Axial, Centrifugal and Expander Compressors - DeP 31.29.40.30

DEP SPECIFICATION

AXIA A XIAL L , CENTRIFUGAL , AND EXPA NDER COMPRESSORS (AMENDMENTS/SUPPLEMENTS TO API STD 617)

e l a s e r r o f t o N . l l e h S m o r f e s n e c i l t u o h t i w d e t t i m r e p g n i k r o w t e n r o n o i t c u d o r p e r o N . s e i n a p m o C f o p u o r G l l e h S t h g i r y p o C

DEP 31.29.40.30-Gen. February 2016

ECCN EAR99

DESIGN AND ENGINEERING PRACTICE

DEM1

© 2016 Shell Group of companies All rights reserved. No part of this document may be reproduced, stored in a retrieval system, published or transmitted, in any form or by any means, without the prior written permission of the copyright owner or Shell Global Solutions International BV. This document contains information that is classified as EAR99 and, as a consequence, can neither be exported nor re-exported to any country which is under an embargo of the U.S. government pursuant to Part 746 of the Export Administration Regulations (15 C.F R. Part 746) nor can be made available to any national of such country. In addition, the information in this document cannot be exported nor re-exported to an end-user or for an end-use that is prohibited by Part 744 of the Export Administration Regulations (15 C.F.R. Part 744).

This document has been supplied under license by Shell to: Petroleum Development Oman GNMechanicalInspector@ [email protected] pdo.co.om 27/06/2016 14:46:49

ECCN EAR99

DEP 31.29.40.30-Gen. 31.29.40.30-Gen. February 2016 Page 2

PREFACE DEP (Design and Engineering Practice) publications reflect the views, at the time of publication, of Shell Global Solutions International B.V. (Shell GSI) and, in some cases, of other Shell Companies. These views are based on the experience acquired during involvement with the design, construction, operation and maintenance of processing units and facilities. Where deemed appropriate DEPs are based on, or reference international, regional, national and industry standards. The objective is to set the standard for good design and engineering practice to be applied by Shell companies in oil and gas production, oil refining, gas handling, gasification, chemical processing, or any other such facility, and thereby to help achieve maximum technical and economic benefit from standardization. The information set forth in these publications is provided to Shell companies for their consideration and decision to implement. This is of particular importance where DEPs may not cover every requirement or diversity of condition at each locality. The system of DEPs is expected to be sufficiently flexible to allow individual Operating Units to adapt the information set forth in DEPs to their own environment and requirements. When Contractors or Manufacturers/Suppliers use DEPs, they shall be solely responsible for such use, including the quality of their work and the attainment of the required design and engineering standards. In particular, for those requirements not specifically covered, the Principal will typically expect them to follow those design and engineering practices that will achieve at least the same level of integrity as reflected in the DEPs. If in doubt, the Contractor or Manufacturer/Supplier shall, without detracting detracting from his own respons bility, consult the Principal. The right to obtain and to use DEPs is restricted, and is typically granted by Shell GSI (and in some cases by other Shell Companies) under a Service Agreement or a License Agreement. This right is granted primarily to Shell companies and other companies receiving technical advice and services from Shell GSI or another Shell Company. Consequently, three categories of users of DEPs can be distinguished: 1)

Operating Units having a Service Agreement with Shell GSI or another Shell Company. The use of DEPs by these Operating Units is subject in all respects to the terms and conditions of the relevant Service Agreement.

2)

Other parties who are authorised to use DEPs subject to appropriate contractual arrangements (whether as part of a Service Agreement or otherwise).

3)

Contractors/subcontractors and Manufacturers/Suppliers under a contract with users referred to under 1) or 2) which requires that tenders for projects, materials supplied or - generally - work performed on behalf of the said users comply with the relevant standards.

Subject to any particular terms and conditions as may be set forth in specific agreements with users, Shell GSI disclaims any liability of whatsoever nature for any damage (including injury or death) suffered by any company or person whomsoever as a result of or in connection with the use, application or implementation of any DEP, combination of DEPs or any part thereof, even if i t is wholly or partly caused by negligence on the part of Shell GSI or other Shell Company. The benefit of this disclaimer shall inure in all respects to Shell GSI and/or any Shell Company, or companies affiliated to these companies, that may issue DEPs or advise or require the use of DEPs. Without prejudice to any specific terms in respect of confidentiality under relevant contractual arrangements, DEPs shall not, without the prior written consent of Shell GSI, be disclosed by users to any company or person whomsoever and the DEPs shall be used exclusively for the purpose for which they have been provided to the user. They shall be returned after use, including any copies which shall only be made by users with the express prior written consent of Shell GSI. The copyright of DEPs vests in Shell Group of companies. Users shall arrange for DEPs to be held in safe custody and Shell GSI may at any time require i nformation satisfactory to them in order to ascertain how users im plement this requirement. All administrative queries should be directed to the DEP Administrator in Shell GSI.


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DEP 31.29.40.30-Gen. 31.29.40.30-Gen. February 2016 Page 3 TABLE OF CONTENTS

PART I 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8

INTRODUCTION ............................................................... ........................................................................................................ ......................................... 5 SCOPE........................................................................................................................ ........................................................................................................................ 5 DISTRIBUTION, INTENDED USE AND REGULATORY CONSIDERATIONS ......... 5 DEFINITIONS ......................................................... ............................................................................................................. .................................................... 5 CROSS-REFERENCES CROSS-REFERENCES ............................................................... ............................................................................................. .............................. 6 SUMMARY OF MAIN CHANGES............................................................ ............................................................................... ................... 6 COMMENTS ON THIS DEP ....................................................................................... ....................................................................................... 6 DUAL UNITS ........................................................................................... ............................................................................................................... .................... 7 NON NORMATIVE TEXT (COMMENTARY).............................................................. 7

PART II

GENERAL REQUIREMENTS .................................................................................... .................................................................................... 8

PART III

AMENDMENTS/SUPPLEMENTS TO API STD 617.................................................. 9

Part Part 1

General General Requirements ................................................................ .............................................................................................. .............................. 9

3

Terms, Defin ition it ion s, and Abb revi atio ns ................ ...................... ........... ........... ........... ........... ........... ........... ........... ........... ........ 9

4 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

General ......................................................... ....................................................................................................................... ..............................................................9 Statutory Requirements ............................................................. ........................................................................................... .............................. 9 Unit Responsibil Responsibil ity .......................................................... ................................................................................................. ....................................... 10 10 Basic Design ........................................................ ........................................................................................................... ................................................... 11 Materials...................................................... Materials ................................................................................................................... ............................................................. 13 Casings ........................................................ .................................................................................................................... ............................................................ 16 Rotating Elements ........................................................... .................................................................................................. ....................................... 21 21 Dynamics ............................................................... ................................................................................................................. ..................................................23 Bearings Bearings and Bearing Bearing Housings .......................................................... ........................................................................... ................. 27 Shaft End Seals Seals ................................................................ ....................................................................................................... .......................................27

5 5.1 5.2 5.3 5.4 5.5 5.6 5.7

Ac ces sori so ri es ........................................................... ............................................................................................................. .................................................. 30 Drivers and Gearing . ...............................................................................................30 Couplings and Guards ............................................................... ........................................................................................... ............................ 31 Lubrication and Sealing Sealing Systems ........................................................ ......................................................................... ................. 31 Mounting Plates ................................................................ ...................................................................................................... ...................................... 32 Controls and Instrumentation .............................................................. ................................................................................ .................. 34 Piping and Appurtenances ........................................................ .................................................................................... ............................ 34 Special Tools ......................................................... ........................................................................................................... ..................................................34

6 6.1 6.2 6.3 6.4

Insp ecti on, Testi ng and Prepar atio n f or Ship ment .............. ................... ........... ........... ........... ........... ......... ....34 ..................................................................................................................... ............................................................34 General ......................................................... Inspection .............................................................. ................................................................................................................ ..................................................35 Testing ......................................................... ..................................................................................................................... ............................................................ 35 Preparation for Shipment ........................................................... ....................................................................................... ............................37

7 7.1 7.2

Suppl Sup plier ier ’s Data ...................................................... ........................................................................................................ .................................................. 38 General ......................................................... ..................................................................................................................... ............................................................38 Proposals ............................................................... ................................................................................................................. ..................................................38

8 8.1 8.2 8.3

Weight Cont rol for Offs hor e Facili ti es ............ ................. ........... ........... ........... ........... ........... ........... ........... ........... .......... .....40 General ......................................................... ..................................................................................................................... ............................................................40 Engineering Engineering Information ............................................................ ........................................................................................ ............................ 40 Weight Weight Control During Manufacturing Manufacturing ..................................................................41

Part Part 2

Noni nteg rall y Geared Centri fugal fu gal and A xi al Comp ress ors ....... ............. ........... ........... ........... ........ ... 42

4 4.4 4.6 4.7 4.8 4.9

General ......................................................... ..................................................................................................................... ............................................................42 Basic Design ........................................................ ........................................................................................................... ................................................... 42 Casings ........................................................ .................................................................................................................... ............................................................ 43 Rotating Elements ........................................................... .................................................................................................. ....................................... 46 46 Dynamics ............................................................... ................................................................................................................. ..................................................47 Bearings Bearings and Bearing Bearing Housings .......................................................... ........................................................................... ................. 48


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5 5.5 5.6

DEP 31.29.40.30-Gen. February 2016 Page 4

Ac ces sories ............................................................................................................. 50 Controls and Instrumentation ................................................................................ 50 Piping and Appurtenances .................................................................................... 51

6 Insp ecti on, Testing and Prepar atio n f or Shipment .............................................51 6.3 Testing ..................................................................................................................... 51 6.4 Preparation for Shipment .......................................................................................54 Annex B (informative) .................................................................................................................... 54 Part 3

Integr ally Geared Centri fug al Compress ors ........................................................55

4 4.4 4.6 4.7 4.8 4.9 4.11

General .....................................................................................................................55 Basic Design ........................................................................................................... 55 Casings .................................................................................................................... 55 Rotating Elements .................................................................................................. 56 Dynamics .................................................................................................................56 Bearings and Bearing Housings ........................................................................... 56 Integral Gearing ...................................................................................................... 57

5 5.1 5.4 5.5 5.6

Ac ces sories ............................................................................................................. 58 Drivers ......................................................................................................................58 Mounting Plates ...................................................................................................... 58 Controls and Instrumentation ................................................................................ 58 Piping and Appurtenances .................................................................................... 59

6 Insp ecti on, Testing, and Prepar atio n f or Shipment ............................................ 59 6.3 Testing ..................................................................................................................... 59 6.4 Preparation for Shipment .......................................................................................60 Annex B (informative) .................................................................................................................... 60 Part 4

Expander-compressors .......................................................................................... 61

4 4.4 4.7 4.8 4.9

General .....................................................................................................................61 Basic Design ........................................................................................................... 61 Rotating Elements .................................................................................................. 61 Dynamics .................................................................................................................61 Bearings and Bearing Housings ........................................................................... 62

5 5.5

Ac ces sories ............................................................................................................. 63 Controls and Instrumentation ................................................................................ 63

6 Insp ecti on, Testing, and Prepar atio n f or Shipment ............................................ 63 6.3 Testing ..................................................................................................................... 63 6.4 Preparation for Shipment .......................................................................................63 Annex B (informative) ....................................................................................................................64 PART IV

REFERENCES ......................................................................................................... 65

This document has been supplied under license by Shell to: Petroleum Development Oman [email protected] 27/06/2016 14:46:49

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PART I

INTRODUCTION

1.1

SCOPE This DEP specifies requirements and gives recommendations for axial, centrifugal and expander compressors. th

This DEP is based on API Standard 617, 8 edition, published September 2014. This DEP contains mandatory requirements to mitigate process safety risks in accordance with Design Engineering Manual (DEM) 1 – Application of Technical Standards. This is a revision of the DEP of the same number dated February 2014; see (1.5) regarding the changes. 1.2

DISTRIBUTION, INTENDED USE AND REGULATORY CONSIDERATIONS Unless otherwise authorised by Shell GSI, the distribution of this DEP is confined to Shell companies and, where necessary, to Contractors and Manufacturers/Suppliers nominated by them. Any authorised access to DEPs does not for that reason constitute an authorization to any documents, data or information to which the DEPs may refer. This DEP is intended for use in facilities related to oil and gas production, gas handling, oil refining, chemical processing, gasification, distribution and supply/marketing. This DEP may also be applied in other similar facilities. When DEPs are applied, a Management of Change (MOC) process shall be implemented; this is of particular importance when existing facilities are to be modified. If national and/or local regulations exist in which some of the requirements could be more stringent than in this DEP, the Contractor shall determine by careful scrutiny which of the requirements are the more stringent and which combination of requirements will be acceptable with regards to the safety, environmental, economic and legal aspects. In all cases the Contractor shall inform the Principal of any deviation from the requirements of this DEP which is considered to be necessary in order to comply with national and/or local regulations. The Principal may then negotiate with the Authorities concerned, the objective being to obtain agreement to follow this DEP as closely as possible.

1.3

DEFINITIONS

1.3.1

General definit ions The Contractor is the party that carries out all or part of the design, engineering, procurement, construction, commissioning or management of a project or operation of a facility. The Principal may undertake all or part of the duties of the Contractor. The Manufacturer/Supplier is the party that manufactures or supplies equipment and services to perform the duties specified by the Contractor. NOTE:

In API STD 617, the term Vendor is used. In this DEP, the term Vendor shall be understood to mean the Manufacturer/Supplier.

The Principal is the party that initiates the project and ultimately pays for its design and construction. The Principal will generally specify the technical requirements. The Principal may also include an agent or consultant authorised to act for, and on behalf of, the Principal. NOTE:

In API STD 617, the term Purchaser is used. In this DEP, the term Purchaser shall be understood to mean the Principal.

The lower-case word shall indicates a requirement. The capitalised term SHALL [PS] indicates a process safety requirement. The word should indicates a recommendation.


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1.3.2

1.4


Abbreviations Term

Definition

CFD

Computational Fluid Dynamics

DGS

Dry Gas Seal

FEA

Finite Element Analysis

PES

Project Execution Strategy

SPEP

Shell Packaged Equipment Solutions

CROSS-REFERENCES Where cross-references to other parts of this DEP are made, the referenced section or clause number is shown in brackets ( ). Other documents referenced by this DEP are listed in (Part IV).

1.5

SUMMARY OF MAIN CHANGES This DEP is a revision of the DEP of the same number dated February 2014. The previous th version of this DEP was based on the 7 edition of API STD 617; this revision is now based th on the 8 edition of API STD 617. The changes are too extensive to list individually. The following table lists the most significant changes.

1.6

Section/Clause

Change

Part 1, 4.4.5, Item 1

This was a duplicate DEM1 requirement, now referring to (identical) 4.4.1.6

Part 1, 4.10.1.3

DEM1 requirement for maximum seal pressure to be at least equal to settle out pressure

Part 1, 6.3.2.1

DEM1 requirement for Hydrotest to be 1.5 * maximum allowable working pressure (MAWP)

COMMENTS ON THIS DEP Comments on this DEP may be submitted to the Administrator using one of the following options: Shell DEPs Online (Users with access to Shell DEPs Online)

Enter the Shell DEPs Online system at https://www.shelldeps.com Select a DEP and then go to the details screen for that DEP. Click on the “Give feedback” link, fill in the online form and submit.

DEP Feedback System (Users with access to Shell Wide Web)

Enter comments directly in the DEP Feedback System which is accessible from the Technical Standards Portal http://sww.shell.com/standards. Select “Submit DEP Feedback”, fill in the online form and submit.

DEP Standard Form (Other users)

Use DEP Standard Form 00.00.05.80-Gen. to record feedback and email the form to the Administrator at [email protected].

Feedback that has been registered in the DEP Feedback System by using one of the above options will be reviewed by the DEP Custodian for potential improvements to the DEP.


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1.7


DUAL UNITS This DEP contains both the International System (SI) units, as well as the corresponding US Customary (USC) units, which are given following the SI units in brackets. When agreed by the Principal, the indicated USC values/units may be used.

1.8

NON NORMATIVE TEXT (COMMENTARY) (COMMENTARY ) Text shown in italic style in this DEP indicates text that is non-normative and is provided as explanation or background information only. Non-normative Non-normative text is normally indented indented slightly to the right of the relevant DEP clause.


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PART II GENERAL REQUIREMENTS Part III of this DEP is written as amendments and supplements to API STD 617, Eighth Edition, September 2014. Wherever reference is made to API STD 617, it shall be understood to mean API STD 617 Eighth Edition, September 2014, as amended/supplemented by this DEP. For ease of reference, the clause numbering of API STD 617 has been used throughout Part III of this DEP. Clauses in API STD 617 that are not mentioned in this DEP shall remain valid as written. A bullet (•) in the margin against certain clauses (paragraphs) in API STD 617 indicates that a decision by the Principal is required. This DEP addresses the decisions required by most of the API STD 617 bullet clauses. The remaining decisions decisions shall be indicated directly on the relevant data/requisition sheet when provisions are made for them; otherwise they shall be indicated on the data/requisition sheet under the heading 'Additional Requirements' or stated in the purchase order.


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PART III AMENDMENTS/SUPPLEMENTS TO API STD 617 This part covers four Parts of API STD 617: Part 1:

General Requirements

Part 2:

Nonintegrally Nonintegrall y Geared Centrifugal and Axial Compressors

Part 3:

Integrally Geared Centrifugal Compressors

Part 4:

Expander – Compressors

Part Part 1

General General Requirements

3

Terms, Definiti ons, and Abbr eviations

3.1

Terms Terms and Definiti Definiti ons

3.1.19

Replace definition with the following: 1.

Refer to DEP D EP 01.00.01.30-Gen. 01.00.01.30- Gen. for determining det ermining the temperature.

minimum design

metal

2.

Refer to DEP 31.10.02.31-Gen. 31.10.02.31- Gen. for the requirements associated with the minimum design metal temperature.

Add the following following new clauses: clauses: 3.1.67 Stonewall Stonewall capacity capacity 1.

The capacity capacity where the the decrease decrease in polytropic polytropic head is 10 % for an increase of of 1 % in inlet volume capacity.

3.1.68 Minimum pressurization temperature temperature 1.

The lowest lowest possible possible temperature temperature of of the casing (or (or container, container, piping, piping, etc.) at which the casing (or container, piping, etc.) may be pressurized to its design pressure.

3.1.69 Very Toxic-acute, -environment, -chronic 1. 3.2

Refer to DEP 01.00.01.30-Gen. 01.00.01.30-Gen.

Abbreviations

Add new abbreviations: abbreviations: 1.

MCOS

Maximum Continuous Operating Speed, also see MCS, clause 3.1.22.

2.

AIGV

Adjustable Inlet Guide Vane

4

General

4.2

Statutor y Requirements Add the following following to this clause: clause: 1.

In the event event of conflict between between documents documents relating relating to the inquiry inquiry or purchase purchase order, order, the following hierarchy of documents shall apply: a.

First level:

Local regulations and statutes

b.

Second level: Purchase order and variations thereto

c.

Third level:

d.

Fourth level level (when indicated in the Purchase Order): PES solution (SPEP) (SPEP)

Data/requisition Data/requisition sheets and drawings


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DEP 31.29.40.30-Gen. February 2016 Page 10 e.

2.

Fifth level:

this DEP (and by construction, the underlying API document)

Any apparent conflict between the requirements of this DEP and any other relevant document in the purchase order shall be notified to the Principal for clarification. Where the Purchase Order indicates a PES solution (SPEP), these conflicts have been approved by Principal during creation of the PES solution and no additional notification is required for those particular conflicts.

4.3

Unit Responsibil ity

4.3.1

Replace this clause with the following: 1.

The Manufacturer shall be responsible for the design and engineering, the total mechanical/aero-dynamic performance, and the guarantee of the entire compressor unit including the compressor, driver, power transmission equipment and all auxiliary equipment furnished by sub-suppliers.

2.

This responsibility shall include determining critical speeds and performing the lateral rotor dynamic analysis for each major component of the unit and the torsional analysis for the entire unit, as well as any other analysis specified in the data/requisition sheets.

Add the following new clauses: 4.3.2 1.

The Manufacturer shall have an implemented and effective quality system in accordance with ISO 9001.

2.

The Manufacturer shall have an implemented and effective design release system, which indicates and presents any design changes for approval by the Principal.

1.

The Manufacturer shall be responsible for coordination including the following as a minimum:

4.3.3

a.

Obtaining information required for fulfilling its obligations;

b.

Communicating necessary data, specifications and other documents to Subsuppliers;

c.

Negotiating interfaces with its Sub-suppliers;

d.

Standardising all components within the train, its auxiliaries and its utility requirements (such as oil type/grade).

4.3.4 1.

The Supplier shall provide a separate quote with the Supplier’s final response to the request for proposal (RFP) for factory service technicians to assist the Purchaser during initial installation, commissioning, and start-up.

1.

The Manufacturer shall base the performance calculations on the gas composition as stated in the data/requisition sheets.

2.

For reference purpose, the physical properties of the process gas (Cp/Cv, molecular weight, etc.) may be given on the data/requisition sheets in order to facilitate the compressor calculations.

1.

The Manufacturer shall:

4.3.5

4.3.6

a.

calculate the performance of all proposed compressors using its standard methods for computing the physical properties of the specified gases

b.

take full responsibility for any design features affected.


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2.

The Manufacturer shall state the equation of state (EOS) and values of all physical properties of the process gas used in computations.

1.

If the data/requisition sheet requires the Manufacturer to calculate compressor performance by means of an alternative computational method (this may include use of an alternative EOS) and the result is a significant difference in the predicted performance of the selected compressor design, the following shall apply:

4.3.7

a.

the Manufacturer to demonstrate the validity of the original calculation results to the Principal

b.

b. the contractual performance prediction of the compressor to be agreed mutually between Principal and Manufacturer

4.4

Basic Design

4.4.1

General

4.4.1.1

Performance

4.4.1.1.3

4.4.1.2

Add the following to this clause: 1.

The Manufacturer shall confirm the ability of the compressor to operate at all other conditions specified in the data/requisition sheets.

2.

The Surge Reference Line and Surge Control Line should be chosen as such that “80% plant throughput” operating points in performance diagram for all normal operating conditions specified in requisition are located on the right hand side of SCL and therefore the Anti-surge control valves are still closed.

Replace the first sentence of this clause with the following: 1.

The equipment (including auxiliaries) covered by this standard shall be designed and constructed for: a.

a minimum service life of 20 years

b.

to deliver at least 6 years of uninterrupted continuous operation, during which time the equipment will not require shutdown to perform maintenance or inspection

Add the following to this clause:

4.4.1.3

2.

Compressor ratings, components and auxiliaries shall not exceed the limits of the Manufacturer's design and be within their actual experience.

3.

The compressor shall be designed for a minimum operating period of 12 years between required major overhaul inspections.


Refer to DEP 31.29.60.32-Gen. for the requirements for the cooling water systems, excluding those on process coolers.

4.4.1.6 Add the following to this clause: 1.

All electrical components and installations SHALL [PS] be suitable for the area classification, gas grouping, and temperature classes specified by the Principal on the data/requisition sheets.


All left-handed threads shall be clearly marked.

2.

Any maintenance item with a mass greater than 20 kg (44 lb) shall be provided with lifting lugs or similar dedicated fixed lifting point(s).

3.

Screw-in eye-bolts may be used only for bearing housing covers and for internal components where other lifting arrangements are impractical.


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4.


The correct bolt size to be for eye-bolts shall be indicated by: a.

permanently marking the hole for the eye-bolt;

b.

only if field marking is impractical, bolt size information to be clearly indicated in the instruction manual.


Compressor units installed on floating facilities, including auxiliaries, shall be capable of accommodating any specified dynamic movement while in tr ansport.

2. Compressor units, including auxiliaries, which are installed on floating facilities or barges, shall be capable of: a.

operating at the specified static vessel positions

b.

operating while accommodating any specified dynamic vessel movements (i.e. pitch, roll, velocity) and deflections

4.4.1.10 Replace this clause with the following : 1.

The Contractor shall communicate the project noise limits in the data requisition sheets.

2.

The Manufacturer shall complete datasheet DEP 31.10.00.94-Gen., which forms part of the requisition.

3.

The Manufacturer shall submit expected sound power levels of the equipment with the proposal, including any special silencing measures necessary to meet the specified levels.

4.

If noise enclosures are supplied: a.

Full access to the equipment for operational and maintenance purposes shall be ensured by means of an appropriate design.

b.

No firefighting system shall be installed inside the noise enclosure.

c.

Gas detectors SHALL [PS] be installed in the noise enclosure, or directly in the exhaust of the enclosure ventilation system.

d.

The design of the enclosure shall not obstruct any required cooling of the equipment.

4.4.1.11 Replace the words “if specified” with: 1.

“Only when specified by Principal”

4.4.2

Speed Requirements

4.4.3


Supplier shall submit vibration acceptance criteria to be used when the equipment is on its permanent foundation (evaluated during commissioning and start-up).

2.

If the Supplier does not provide values, “vibration acceptance criteria” shall be the lower of: a.

200 % of the Avl values used during FAT (4.8.2.10)

b.

66% of the alarm level

4.4.4

In the last sentence of this clause, delete the words “If specified”.

4.4.5


4.4.7

See (Part 1, 4.4.1.6).

In the first sentence of this clause, replace the words “If specified” with the following: 1.

Unless otherwise specified by the Principal,

Add the following to this clause:


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2.


When open loop, atmospheric air operation is specified in the data/requisition sheets, the Manufacturer shall state in the proposal: a.

What modifications, if any, are required in order for the compressor to operate on air.

b.

What constraints, if any, apply to this operational mode.


The Manufacturer/Supplier shall provide details of proven operational experience of identical or similar machines in service and also list in the proposal all detailed design and material changes that have been introduced in the selected compressor design in similar machines in the last 5 years, or which have not acquired at least a total of 24,000 h in operation. This is 24,000 hours combined for all machines and not per machine.

2.

Although the Manufacturers have the right to make continual developments in their product line, these changes shall be subject to review by the Principal.

3.

If the Manufacturer fails to provide evidence of proven reliability, then the Principal should request alternate designs, or initiate design review/development release.

1.

In the event of a design or manufacturing error, faulty material, or damage to a critical compressor part, the damaged component shall be replaced or repaired. Where repair is chosen, the following apply:

4.4.9

a.

The repair method shall be subject to the review and approval of the Principal.

b.

Additional tests or calculations may be required to prove the effectiveness of the repair and that there will be no detrimental effect on the serviceability of the component. Critical compressor parts include casing (including heads and nozzles), impellers following overspeed, and shafts.

4.5

Materials

4.5.1

General

Add the following clause: 1. 4.5.1.1

All repairs to pressure containing parts shall be subject to approval by the Principal.


The Manufacturer may offer alternative materials, subject to approval of the Principal, if its experience indicates that these would be a better selection, provided these proposed materials are confirmed to be suitable for the gas composition(s) given in the data/requisition sheets.

4.5.1.2 Add the following to this clause: 1. 4.5.1.6

Equivalent materials in accordance with other internationally recognised standards may be acceptable, subject to approval by the Principal.

Replace this clause and the “NOTES” in this clause with the following : 1.

For compressors handling gas containing hydrogen sulfide (H2S) as defined by standard NACE MR0103, all components including associated systems and ancillaries in contact with the gas SHALL [PS] comply with NACE MR0175 / ISO 15156 or NACE MR0103, as applicable. a.

NACE MR0175 / ISO 15156 apply to oil and gas production facilities and natural gas sweetening plants. NACE MR0175 is equivalent to ISO 15156.


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DEP 31.29.40.30-Gen. February 2016 Page 14 b.

NACE MR0103 applies to other applications (e.g., oil refineries, LNG plants and chemical plants).

c.

In many applications, small amounts of H2S are sufficient to require materials resistant to sulfide stress corrosion cracking. When there are trace quantities of wet H2S known to be present or if there is any uncertainty about the amount of wet H2S that may be present, the purchaser should consider requiring materials that are resistant to sulfide stress corrosion cracking.

2.

Hydrogen Induced Cracking (HIC) tested plate shall be used for moderate sour service as determined by the Principal. Refer to DEP 30.10.02.17-Gen.

3.

Hardness control (within the limits of NACE MR0175 / ISO 15156 or NACE MR0103) of all components in contact with H 2S shall be demonstrated.

4.

The Manufacturer shall submit all welding procedures including a cross-sectional hardness survey with the appropriate supporting Procedure Qualification Records. The welding requirements shall meet the requirements of NACE MR0175 / ISO 15156 or NACE MR0103 as applicable.

5.

Dissimilar metal welds shall not be used in any components in contact with H 2S.

6.

The stress level of all carbon and low alloy steel components in contact with sour gas (such that NACE materials restrictions are imposed) shall be limited to 75 % of their specified minimum yield strength. The stress level of other steel alloys shall be subject to approval by the Principal.

7.

External bolting on the casing and seal glands covered by lagging, insulation, blankets, weather shields, or similar coverings are subject to (Part 1, 4.5.1.6, item 1), meaning they have DEM1 requirement to comply with NACE MR0175 / ISO 15156 or NACE MR0103, as applicable.

8.

Steel plate materials shall comply with the through-thickness tensile test of ASTM A770 (S3) and shall have a minimum reduction of area of 35 %.

9.

In dry conditions, as per severity diagram for carbon or low alloy steel (7.2.1.2), NACE MR0175 / ISO 15156 shall be applied in case of H 2S partial pressure (ppH2S) greater than 0.0030 bar (0.0435 psi). In sour service with wet condition with ppH 2 S greater than 0.0030 bar (0.0435 psi), the failure risk is due to wet H 2S. The damage mode is related to hydrogen uptake and hydrogen embrittlement.

10. NACE materials shall apply for hydrocarbons gases with ppH 2S greater than 0.0030 bar (0.0435 psi). 11. If the pressure rating of horizontally split casings, handling gases containing hydrogen sulfide, requires a bolt design exceeding the limitations of NACE MR0175 / ISO 15156 or NACE MR0103, as applicable, the Manufacturer may consider a barrel type casing as an alternative to modifying the horizontally split casing design. 12. Refer to DEP 39.01.10.12-Gen. for additional requirements on use of martensitic precipitation hardened material in pressure containing and controlling components. Note, DEP 39.01.10.12-Gen. has a Process Safety, DEM1 requirement forbidding use of such material for pressure containing or pressure controlling service. 4.5.1.7 Add the following to this clause: 1.

Refer to clause 4.5.1.6 , Item 1.a and 1.b


Overlays, including chromium plating, iron plating, plasma spray, impregnation, or similar methods, may be applied subject to approval by the Principal.


ECCN EAR99



For welded components with a maximum allowable temperature above 200 °C (400 °F), the limitations of NACE MR0175 / ISO 15156 or NACE MR0103, as applicable, SHALL [PS] apply.


If the Manufacturer of studs and nuts specifies anti-seizure compounds, modified torque values should be included in the manuals.

2.

Molybdenum disulfide lubricants should not be used.

3.

Close tolerance mating parts, such as shaft sleeves, that are made from galling materials and that cannot be disassembled by hydraulic or thermal expansion techniques should have a suitable metallic coating to prevent galling.


The Manufacturer should specify the Supplier, material, grade, and Shore hardness of all O-rings, including O-rings used in oil seals and dry gas seals, and demonstrate that the selected materials are suitable for the specified operating conditions.

2.

O rings shall be capable of withstanding a rate of depressurization of 80% of maximum pressure in 15 minutes.

4.5.1.16 Delete “if specified” from the first sentence of this clause. 4.5.1.17 Replace in this clause “if specified” with: 1.

Only when specified and approved by Principal.

4.5.1.19 Low Temperatu re Servic e 4.5.1.19.2

Delete “if specified” from the first sentence of this clause.

4.5.1.19.3 Add the following to the end of the first sentence: 1.

Refer to DEP 01.00.01.30-Gen. for the requirements for determination of the minimum design metal temperature. Normally, this will be the lower of the minimum surrounding ambient temperature or minimum gas compressing temperature; however, the purchaser can specify a minimum design metal temperature based on properties of the compressed gas, such as auto refrigeration at reduced pressures.

4.5.1.19.6 Add the following to this clause: 1.

For pressure-containing parts that can operate at a temperature of 0 °C (32 °F), or below, the proposed materials of construction shall be subject to approval by the Principal.

Add the following new clause: 4.5.1.19.8 1.

Refer to DEP 31.10.02.31-Gen. for additional requirements for compressors in low temperature service.

Add the following new clauses: 4.5.1.20 1.

NACE materials shall have coupons follow along with project material at all heat treatment steps, and tested to demonstrate material properties to be NACE compliant.

1.

Refer to DEP 39.01.10.12-Gen. for additional requirements on materials in H 2S environments.

4.5.1.21


ECCN EAR99

4.5.2

Castings

4.5.2.3.2

Delete this clause.

4.5.2.5.3


4.5.3


Use of cast iron for non-pressure containing components shall be subject to approval by the Principal.

Forgings


Any material not listed in the Annex D of Parts 2, 3 or 4, shall be subject to approval by the Principal.

4.6

Casings

4.6.1

Pressure-containi ng Casings


Delete the text “or cast iron” from this clause.

4.6.1.3.1


4.6.1.3.2 4.6.1.4

Pressure containing casings shall not be de-rated from their design MAWP and the applied hydrostatic test pressure shall be selected accordingly.

Ductile cast iron shall be in accordance with ASTM A395 or ASTM A571. Delete this clause.

Delete the words “or eye bolts” the third sentence of this clause.

4.6.1.7 4.6.1.7.5

Delete “if specified" from the first sentence of this clause

4.6.1.7.6

Replace this clause with the following:

4.6.1.9

1.

The minimum quality bolting material for pressure joints shall be ASTM A193 Grade B7.

2.

For compressors in H2S service, all internal and external bolting on the casing and piping shall be ASTM A193 Grade B7M with Grade 2HM nuts.

3.

See (Part 1, 4.5.1.19) for low temperature requirements.


The Welding Procedure Specifications and Procedure Qualification Records shall be made available to the Purchaser for review and approval.

Add new clause: 4.6.1.10 1.

Any manufacturing process that uses plugging or welding to manufacture a casing part shall be clearly highlighted in the proposal by vendor.

4.6.2

Casing Repairs and Inspecti ons

4.6.2.1


Destructive mechanical tests, including impact tests if required, shall be carried out on test blocks after all heat treatments have been performed, including those for any repairs.


Refer to (Part III, 4.5.1) for requirements on approval for repairs

4.6.2.3


ECCN EAR99


Add the following new clauses: 4.6.2.3.1 1.

Leaks and defects in pressure-containing castings SHALL [PS] not be repaired by peening or burning-in, or by impregnation with plastics or cement compounds.

2.

Leaks and defects in pressure-containing castings shall be reported to the Principal for approval on plan to correct.

3.

Repair by welding or plugging shall be undertaken only if permitted by the material specification, and then only in accordance with requirements specified in (4.6.2.2), (4.6.2.3.2) and (4.6.2.3.3).

4.6.2.3.2

Repair by Welding 1.

Weldable grades of castings may be repaired by welding subject to the following criteria: a.

Details of all major weld repairs (per 4.6.2.2) and the heat treatment shall be recorded and reported to the Principal.

b.

The repair welding procedures and the repair welder's qualifications shall be in accordance with ISO 15607 / ISO 9606, ASTM A488, ASME IX, or equivalent standard approved by the Principal.

2.

Weld repairs SHALL [PS] not be performed on ductile cast iron.

3.

Regardless of the size of the weld repair, any casing of C-1/2Mo,1-1/4Cr-1/2Mo through to 12 Cr alloy SHALL [PS] be postweld heat treated after repair, through either a local PWHT or a complete casing PWHT.

4.6.2.3.3

Repair by plugging 1.

The need for repair by plugging shall be reported to the Principal and shall be subject to approval by Principal (before any repair is commenced).

2.

Ductile cast iron may be repaired by plugging within the limits specified in ASTM A395 and shall be reported to the Principal.

3.

The drilled holes for plugs shall be carefully examined by dye penetrant to ensure removal of all defective material.

4.

All necessary repairs not covered by ASTM shall be subject to approval by the Principal.

5.

Details of all repairs shall be recorded and included in the manufacturing report.

4.6.2.4 4.6.2.4.1


Plates from which pressure-containing components are to be cut, forged, rolled, or formed in any other manner shall be subject to systematic ultrasonic inspection for laminations in accordance with ASTM A578 (level B) or equivalent approved by the Principal.

2.

To prevent laminar tearing, ASME Section VIII Division I, UG-93 (d)(3) should be applied to all joints where laminar tearing may become a concern. a.

Inspection methods and acceptance criterion shall be per ASME Section VIII, Division I, Appendix 6 or Appendix 8 as applicable.

4.6.2.4.3

Delete the words “If specified”.

4.6.2.4.6


All welds in the casing, including those in piping attached to the casing, SHALL [PS] be examined radiographically or ultrasonically.


ECCN EAR99

4.6.3


2.

Fillet welds (those not covered by 4.6.2.4.6, Item 1) may be examined by magnetic particle or liquid penetrant.

3.

See clause (4.6.3) for requirements and acceptance criteria.

4.

Residual gauss levels in fabricated steel casings and steel casting that have been weld repaired shall be a maximum of 0.001 tesla (10 gauss).

Material Inspecti on of Pressure-containi ng Parts Replace this entire section and clauses with the following:

4.6.3.2

Material Inspecti on Table 1.

Material inspection shall be carried out as summarised in the Table 4.1; the procedures and acceptance criteria are given in the subsequent clauses. Table 4.1

Summary of Inspecti on of pressur e-cont aining parts

Component

Required Material Inspecti on

Compressor casing – cast

RT (or UT per 4.6.3.3), and MT or PT; and VI

Compressor casing – fabricated materials

UT, and MT or PT; and VI

Compressor inner barrel

RT or UT, VI and MT or PT

Compressor fabrication welds: -full penetration welds

RT or UT, and MT or PT

-fillet welds

MT or PT

Diaphragms, guide channels

MT or PT, and VI

Labyrinths

VI

Shaft

UT, VI, and MT or PT (see 4.6.3.1, Item 5)

Impellers

RT or UT, and MT or PT, and VI (see 4.3.3.6)

Shaft sleeves, balance piston

MT or PT, and VI

Bearing housing, bearings

VI and MT; or UT

Shaft seals

VI

NOTES: 1. Material inspection descriptions: VI=Visual Examination MT=Magnetic Particle Examination PT=Liquid Penetrant Examination RT=Radiographic Examination UT=Ultrasonic Examination 2.

"Casing" includes all items of the pressure boundary of the finished compressor casing (the casing itself and other parts such as nozzles, flanges, end head, closure plates, shear rings etc.).

3.

RT shall be applied to cast casings where the UT does not provide conclusive results.

4.

Timing of inspection shall be as follows: a.

VI/MT/PT performed after final heat treatment in the final machined condition.

b.

RT/UT of castings: i.

before or after final heat treatment if it is followed by MT/PT after the heat treatment.


ECCN EAR99


iii.

the radiographic sensitivity indicator (e.g., penetrameter) shall be selected according to the actual thickness.

RT of welds and UT of fabricated material and welds after final heat treatment.

d.

UT of wrought material prior to any machining operations (e.g., for keyways, drilled holes) that may interfere with the UT examination.

5.

PT examination shall only be used where MT is not feasible see (4.6.3.5).

6.

Shafts of compressors with a driver rated power above 50 MW (67000 hp) shall have a full UT examination.

7.

Refer to ASME VIII, Division 1, Appendix 7 for acceptance criteria for inspection of castings. a.

Critical sections of each casting shall be fully radiographed.

b.

UT shall be used for the following: i.

where critical sections of casting cannot be radiographed

ii.

for casting wall thickness above 50 mm (2 in).

The Manufacturer shall submit details of the critical sections proposed to undergo RT/UT, for the Principal's approval.

Radiographic examination (RT) 1.

RT of welds shall be in accordance with ASME VIII, Division 1, UW-51. a.

4.6.3.4

after final heat treatment but they need not be in the final machined condition provided that the thickness is not more than 110 % of the final thickness.

c.

c. 4.6.3.3

ii.

Coverage shall be 100 %.

Ultrason ic examination (UT)

4.6.3.4.1 1.

UT of welds shall be in accordance with ASME VIII, Division 1, Appendix 12. a.

Coverage shall be 100%.

2.

UT of welds shall be performed for weld thicknesses over 30 mm (1.2 in).

1.

UT of fabricated material shall be in accordance with ASME V, Article 5. The acceptance criteria shall be as follows:

4.6.3.4.2

a. Austenitic forgings, referring to ASTM A745, as follows:

b.

i.

QL-1 for straight beam with thickness t = 0 mm to 75 mm (0 in to 3.0 in)

ii.

QL-2 for straight beam with thickness t = 76 mm to 200 mm (3.001 in to 8.000 in)

iii.

QA-2 for angle beam, all thicknesses.

Non-austenitic forgings, referring to ASTM A388, as follows: i.

For straight beam examination, back reflection method, no areas shall have a loss of 95 % or more of the reference back reflection.

ii.

For straight beam examination, reference block method, there shall be no indications equal to, or larger than, the indication received from the reference block constructed with the following flat bottomed holes: 1) 1.5 mm for t = 0 mm to 37 mm (0 in to 1.500 in) 2) 3 mm for t = 38 mm to 150 mm (1.501 to 6.000 in)


ECCN EAR99

DEP 31.29.40.30-Gen. February 2016 Page 20 3) 6 mm for t = 151 mm (6.001 in) and greater iii.

c.

d.

4.6.3.5

For material inspection during fabrication see (4.6.2.4.1).

ii.

After fabrication UT inspection shall be in accordance with ASTM A577.

Tubular material, in accordance with ASTM E213, in which the calibration notch shall take the following form: i.

Shape rectangular

ii.

Depth a maximum 5 % of the nominal wall thickness

iii.

Length 25 mm ±0.5 mm (1.000 in ±0.020 in)

iv.

Width no greater than twice the depth

All welds and wrought material surfaces shall be examined.

Liqu id Penetrant Examination (PT) 1.

PT shall only be performed when specified MT is not possible.

2.

PT shall be done in accordance with ASME VIII, Division 1, Appendix 7 for castings or Appendix 8 for welds and wrought material. a.

All casting, weld and wrought surfaces shall be examined.

Visu al Examinati on (VI) 1.

4.6.3.8

i.

MT of welds and wrought material shall be performed in accordance with ASME VIII, Division 1, Appendix 6. a.

4.6.3.7

Plate material

Magnetic partic le examination (MT) 1.

4.6.3.6

For angle beam examination, there shall be no indications equal to, or larger than, the indication received from the reference notch or amplitude reference line.

All surfaces shall be VI inspected in accordance with ASME V, Article 9.

2.

Acceptance criteria for pressure-containing steel castings shall be in accordance with ASTM A802.

3.

Acceptance criteria for other parts shall be in accordance with the material specification and the Manufacturer's documented procedures."

Hardnes s Testin g 1.

Welds and associated heat-affected zones shall be hardness tested as follows: a.

100% of all repair welds

b.

10 % of all production welds made by each welder or welding operator.

2.

Hardness shall be in compliance with the requirements of NACE MR0175 and MR0 103 / ISO 15156.

3.

Hardness testing shall be done on coupons created at the same time as the repair or production welds.

4.

Hardness testing on new parts shall not be done as this creates stress risers in the parts at the point of testing.

4.6.4

Pressure Casing Connectio ns

4.6.4.1

General

4.6.4.1.1


All connections shall be flanged or machined and studded. All process gas connections to the casing shall be suitable for the MAWP.


ECCN EAR99

2. 4.6.4.1.7

4.6.4.2

No threaded connection SHALL [PS] be applied for any pressure casing connection. Replace this clause with the following:

1.

If required by the compressor Supplier, casing drains shall be provided.

2.

When casing drains are provided, the individual drains should be manifolded into a common drain connection, piped to an accessible location."

Main Process Connecti ons

4.6.4.2.6


4.6.4.2.7

Ductile or nodular cast iron flanges shall be subject to approval by the Principal. Replace this clause with the following:

1. 4.6.4.3


Flat-faced flanges may be used only on ductile cast iron casings and shall have full raised-face thickness.

Aux ili ary Connectio ns

4.6.4.3.2


If approved by the Principal, NORSOK flanges (and possibly other compact flanges) may be used on compressor auxiliary connections when standard ANSI flanges interfere with compressor assembly and disassembly.

2.

If flanges other than ANSI are used at the compressor auxiliary connections, actual customer connections shall still be in accordance with ASME standards.

4.6.4.3.3


Auxiliary connections shall be welded and flanged or machined and studded.

2.

All welded connections shall be full penetration. a.

Socket welded connections shall not be permitted where there is a possibility of crevice corrosion or in applications where there is the potential for cracking.

b.

Socket welded connections shall not be allowed on lube oil and dry gas seal connections.

3.

Openings smaller than DN 25 (NPS 1) shall be reinforced.

4.

Casing connections shall not be smaller than DN 20 (NPS ¾).

Delete the following clause and all of its subclauses: 4.6.4.3.8

Requirements for Threaded Connections


Openings in process gas containing casings that are not connected to piping SHALL [PS] be provided with an appropriate gasket and a blind flange of the same pressure rating as the corresponding casing connection flange.

1.

Pressure or temperature measurement connections shall not be made in the main process nozzles.

4.6.4.5

4.7 4.7.6

Rotating Elements Add the following to this clause: 1.

Replaceable thrust collars shall be hydraulically fitted into position.

Add the following new clause: 4.7.9.1


ECCN EAR99

1. 4.7.10


Sleeves, spacers and bushings shall be made of non-galling materials.

Impellers


The Manufacturer/Supplier shall provide details of proven operational experience of impellers in identical or similar service and list in the proposal all detailed design and material changes that have been introduced in the selected design in similar machines in the last 5 years, or which have not acquired at least 24,000 h in operation. This is 24,000 hours combined for all machines and not per machine.

2.

The Manufacturer shall demonstrate by means of appropriate calculations (e.g., finite element analysis) that the stress levels in the impellers are within acceptable limits and that the design does not suffer from harmful resonances, excited by any speed harmonic in the machine.

3.

If the Manufacturer cannot provide the above evidence, a frequency test shall be performed to confirm that the design is free of any harmful resonances.

4.

Where finite element analysis (FEA) is used, the Manufacturer shall furnish the maximum calculated stresses at trip speed, maximum allowable speed and overspeed for all rotating components. a.

5.

These values shall not exceed the minimum specified and certified yield strength of the material.

Average impeller stresses at maximum continuous operating speed shall be less than 70 % of the material yield strength, unless otherwise approved by the Principal.

4.7.10.1.2 1.

The Manufacturer shall demonstrate that all impellers offered in the proposal have proven aerodynamic performance. a.

Unless there are three or more available references in identical or similar services, a specific impeller test shall be carried out.

b.

Model testing is acceptable, provided it is done under aerodynamic and thermo-dynamic similarity conditions and supported by Computational Flow Dynamics (CFD) analysis.

c.

The scope of any testing and the proposed test procedures shall be subject to mutual agreement between the Manufacturer and the Principal.

In this context, “proven” is understood to mean the design has recorded a combined total of at least 24,000 hours of operation in similar service in at least three separate machines without failure (i.e. the sum of hours for all three machines). 4.7.10.1.3 1.

If the compressor has one or more sidestream flows, the Manufacturer shall demonstrate the adequate mixing of the main and sidestream flows at the inlet of the relevant impellers by at least three references in s imilar service.

2.

Sidestream designs outside of demonstrable Manufacturer experience should be modelled using CFD and experimentally tested/verified.

3.

The CFD models of the sidestream should meet the following: a.

include full 360 degrees of the domain (the use of cyclic symmetry is unacceptable)

b.

demonstrate the amount of mixing loss of the streams;


ECCN EAR99

DEP 31.29.40.30-Gen. February 2016 Page 23 c.

show that the flow into the downstream impeller is acceptable both in terms of radial and circumferential distortion.

4.

Acceptable limits for radial and circumferential distortion should be clearly specified and the possible effects on compressor performance and mechanical integrity estimated and justified.

5.

The CFD code should meet the following: a.

a recognized program that is fully 3D with at least a two-equation turbulence model (e.g., K-epsilon or K-Omega);

b.

have sufficient grid resolution to resolve near-wall boundary layers

c.

Manufacturer demonstrates that grid refinement and proximity are sufficient;

d.

mixing plans between rotating and stationary computational domains allow radial variations of flow to be transported.

6.

Boundary conditions should be sited as to minimize influence on solution and well away from zones of interest.

7.

Taking all transient conditions into account, acceptable temperature and velocity profiles shall be demonstrated to prevail at the impeller inlet. These results shall be submitted to the Principal for approval.

4.7.10.1.4

Rotating stall

1.

The compressor shall be designed to avoid any tendency to develop rotating stall in any rotating or stationary part.

2.

If, at any stage of the compressor, the outlet gas velocity angle of the impeller and/or the inlet velocity angle of the diffuser are outside the proven limits of the specific impeller/diffuser combination, the Manufacturer shall provide evidence in the form of a CFD analysis and/or results of model tests that rotating stall will not occur in the respective stages.

3.

If required by the Principal, the Manufacturer shall demonstrate that the impeller/diffuser design complies with the criteria known from internationally accepted publications on this matter (e.g., Kobayashi).

4.7.10.7 Add the following new clause: 4.7.10.7.1

4.7.10.8

1.

The impeller overspeed test shall be based on the maximum allowable speed for that impeller design.

2.

The overspeed test values shall be permanently recorded and tied to a unique indicator on the impeller (serial number) and recorded on the compressor Manufacturer certificate for the specific impeller.


Metal plating of impeller bores shall not be permitted.

4.8

Dynamics

4.8.1

General

4.8.1.3

Delete from the first sentence of this clause the words: “If specified”.

4.8.1.4 4.8.1.4.1


The lateral analysis report shall include the following:


ECCN EAR99

DEP 31.29.40.30-Gen. February 2016 Page 24 a.

Dimensional data of the bearing design in sufficient detail to enable calculations of stiffness and damping coefficients.

b.

Shaft geometry with sufficient detail to model the shaft including the location of bearing centrelines and mounted components.

c.

The weight, polar and transverse moments of inertia and center of gravity of the impellers, balance piston, shaft end seals and coupling(s) with sufficient detail to conduct an independent analysis of the rotor.

d.

The input model used for the Vendor’s analysis.

4.8.1.4.2

Replace the words "If specified" with "Unless otherwise specified."

4.8.1.4.3


4.8.1.5 4.8.1.5.2


4.8.1.5.3

Delete the words "If specified."

4.8.2

Lateral Analys is

4.8.2.2

Delete from this clause "If required" Add the following to this clause: 1.

4.8.2.7

The critical speed and separation margin values resulting from the most unfavourable combination of the parameters under (4.8.2.4) shall be used to verify compliance with the criteria in (4.8.3).

Replace final sentence of this clause with: 1.

The magnitude of the unbalances shall be 4 times the value of U r as calculated by Equation (3) or Equation (4).

4.8.2.11 4.8.2.11.1 1.

Replace in second paragraph “Consideration should be given to” with the following : Considerations shall include, but not limited to the following:

4.8.3

Unbalanced Rotor Response Verificati on Test

4.8.3.1

Replace the words in this clause "If specified or" with "Unless otherwise specified by Principal and" Add the following to this clause: 1.

The Manufacturer may offer an alternative shop verification procedure of the unbalanced response analysis, based on verification in a high speed balancing installation, as per API 684. a.

4.8.3.4

This procedure shall be submitted to the Principal for approval.


Unless otherwise specified, the verification test of the rotor unbalance should be performed on all rotors tested, if multiple identical rotors are purchased.

4.8.5

Level 1 Stabilit y Analys is

4.8.5.8

Level I Screening Criteria

Add the following to the start of this clause: 1.

A level II analysis shall be performed if any of the following apply: a.

seals that have high stiffness and/or damping characteristics (such as honeycomb seals, hole pattern or other cylindrical seals) are used for the balance piston or any other internal high pressure drop location

b.

anti-swirl or other stabilizing devices are used


ECCN EAR99


damper bearings are employed.

Replace Item 2) in a) For centrifugal compressors with the following: 2)

δ A < 0.2

Replace “δA < 0.1” in the first sentence in a) For axial flow rotors with the following: 3.

δ A < 0.2

4.8.6

Level II Stabilit y Analys is

4.8.6.2


The Manufacturer shall specify the methodology for determining the stiffness and damping coefficients for the balance piston and other high pressure drop seals.

2.

The Manufacturer shall include the worst case effects of deflection on the seal, causing either divergent or convergent behaviour.


The dynamic coefficients of the seals shall be calculated at their worst case condition for these influences.

Acc eptance Criteria Add the following to this clause: 1.

Level II final log decrement results <0.2 shall be subject to approval by the Principal.

Add the following new clause: 4.8.6.11 1.

If tilt pad journal bearings are used, the analysis should be performed with synchronous tilt pad bearing stiffness and dampening coefficients.

2.

If the Manufacturer has reference data based upon sub-synchronous bearing coefficients, an additional analysis should be provided.

4.8.7

Torsio nal Analys is

4.8.7.1

Delete the first part of the first sentence of this clause “ For trains including motors, generators, positive displacement units, or gears,” Add the following to this clause: 1.

4.8.7.2

The analysis shall include the effects of operating only part of the train, if this is specified in the data/requisition sheets.

Delete from the first sentence of this clause the words "If specified"

4.8.7.4 Add the following new sub clauses: g)

Torsional transients such as switch-on and terminal short circuits of all types of electric motors, as well as the start-up of variable speed motors and synchronous motors.

h)

Harmonic frequencies from variable frequency drive, including the worst-case transient operation.

i)

Any lateral critical speed.

4.8.7.6 4.8.7.6.1


Torsional critical speeds at one times electrical frequency shall be avoided.

2.

Torsional critical speed at one times running speed shall be avoided.


ECCN EAR99


Add the following new clause 4.8.7.6.2 1.

For torsional analysis of variable speed drive system compressor trains, the Manufacturer and the variable speed drive system Supplier shall identify all excitation frequencies and demonstrate that they have no adverse effect.

2.

These excitations shall include, but not be limited to: a.

Speed independent excitations such as ripple

b.

Integer and non-Integer harmonics

c.

Carrier frequency harmonics

d.

Switching harmonics


The procedures for carrying out stress analyses and the corresponding criteria shall be included in the torsional analysis.

Replace the text “ for synchronous motor driven units” in this clause with the following: 1.

4.8.7.8.1

for synchronous motor driven units and for variable speed electric motor driven units, both induction and synchronous. Add the following new sub clauses:

d)

Switch-on of electric motors;

e)

2-phase and 3-phase terminal short circuits of motors;

f)

Pulse operation of variable speed motors.

4.8.7.10 Delete " If specified," from this clause: 4.8.7.11 Replace “ If specified” with “ Unless otherwise specified” in this clause. 4.8.8

Vibration and Balancing


Stacked rotor designs for in-between bearing compressor designs shall be subject to Principal approval.

Delete “ Unless otherwise specified,” from this clause.

4.8.8.2.2

Delete this clause.

4.8.8.3 4.8.8.3.1

Replace “ If specified” with “ Unless otherwise specified” in this clause.

4.8.8.3.2

Replace “ If specified” with “ Unless otherwise specified” in this clause.

4.8.8.4

Operatin g Speed Balancing Procedure

4.8.8.4.5

Delete “ If specified,” from this clause.

4.8.8.11 Insert the following at the beginning of this c lause: 1.

This clause shall not be used unless with prior written permission of the Principal’s Technical Authority (TA2) for Rotating Equipment.

Replace “ Equation (12 )” with 2.

Equation (13a) or Equation (13b) as applicable. API STD 617 Eighth Edition incorrectly refers to Equation (12)


ECCN EAR99

4.9


Bearings and Bearing Housin gs


Radial and thrust bearing assemblies shall be designed and manufactured by a single OEM.

2.

Bearing-metal temperature sensors shall be 100 ohm, 3 wire, platinum RTD's.

4.9.4

Bearing Housin gs

4.9.4.5

Delete “ If specified,” from this clause. Add the following to this clause: 1.

Bearing temperature measuring devices shall terminate at a terminal strip inside the bearing housing.

2.

Extension wires from the terminal strip shall be routed to Manufacturer supplied junction boxes.

4.10

Shaft End Seals

4.10.1

General

4.10.1.1


If rapid de-pressurisation is specified, the Manufacturer SHALL [PS] confirm that the shaft seals and the sealing system are suitable for this and describe the relevant design features.

4.10.1.3 Replace this clause with the following: 1.

The maximum sealing pressure SHALL [PS] be at least equal to the settle-out pressure.


4.10.3

Compressors equipped with mechanical contact type or liquid film type seals shall allow future conversion of the shaft seals into a dry gas seal type without the need for site machining or removal of the compressor casing from its base plate.

Oil Seals


The inward leakage from each seal shall not exceed ‘D’ litres per day per compressor end, where 'D' is the diameter of the shaft at the seal in millimetres.

2.

During the mechanical running test and, if specified, the complete unit test, the actual measured inward seal leakage shall be at least 40 % of the maximum allowed values for each individual compressor end.

4.10.3.4 Delete " If specified," from this clause. Add the following to this clause: 1.

The connection between the overhead tank and the compressor seals shall be sized and designed so that: a.

friction losses are minimal

b.

a minimum of DN 50 (NPS 2) diameter lines is used

c.

the required static pressure or differential pressure is maintained at the compressor seal rings under the most adverse static or dynamic conditions


ECCN EAR99

4.10.4


Self-act ing Dry Gas Seal


Tandem DGS with intermediate labyrinths (Fig. 1.C-9) shall be used unless the sealing pressure requires a double DGS arrangement (Fig. 1.C-7).

2.

All other DGS arrangements require the approval of the Principal.

4.10.4.3 Add the heading “ Cartridge Design” at the beginning of this clause. Add the following new clauses: 4.10.4.3.1 1.

A separation gas seal shall be included in the dry gas seal cartridge.

2.

If possible, the cartridge shall be designed so that such separation gas seals can be replaced in-situ without removing the complete cartridge.

4.10.4.3.2 1.

Seal gas, secondary seal gas, seal buffer gas, and separation gas piping shall be designed to prevent accumulation of liquids in the seal assembly.

2.

Drain valves in the piping shall be provided at the lowest locations.

4.10.4.3.3 1. 4.10.4.3.4

The seal/cartridge design shall be such that secondary sealing devices such as O-rings will not be damaged or dislodged by inadvertent reverse pressure. Tandem Dry Gas Seal A rrangement

4.10.4.3.4.1 1.

The primary leakage (from the inner DGS) shall be routed to a flare.

2.

The system shall be designed to impose a minimal backpressure on the primary DGS while maintaining a sufficient pressure across the secondary DGS to prevent “hangup”.

3.

The system shall be designed / controlled so that all specified pressure fluctuations from the flare can be accommodated without pressure reversal.

4.

The secondary leakage shall be routed to a separate independent atmospheric vent.

4.10.4.3.4.2 1.

The secondary DGS shall be designed for the maximum pressure that may occur under all foreseeable fault conditions. This will generally be with a disintegrated primary DGS with the primary leakage flow limited only by labyrinths and other restrictions and with the maximum pressure in the flare/vent system resulting from other equipment discharging into it.

2.

As a minimum, the secondary DGS and its housing shall have the same pressure rating as the primary DGS.

4.10.4.3.4.3 1.

The Supplier SHALL [PS] confirm that under a major or total seal failure, the following requirements are met: a.

The maximum possible level of gas leakage to flare and atmosphere is bounded by a finite value (which will be indicated in Manufacturer's proposal).

b.

The design of the combination of the restrictive labyrinth between dual or triple tandem seals, the sealing device between the seals and the bearing compartment, and the venting facilities to flare and safe location do not exceed this gas leakage rate, allowing a controlled and safe shut-down.


ECCN EAR99


The venting lines to flare and safe location are adequately sized to avoid overpressurising of the seal/bearing housing.

4.10.4.3.4.4 1.

The compressor Manufacturer shall advise whether it is necessary to increase the quantity of secondary seal gas for cooling purposes. a.

The unit responsible party shall communicate this advice to the Principal.

4.10.4.3.4.5 1. 4.10.4.3.5

The Manufacture shall ensure that dual gasketing (e.g., two O-rings) is installed under the shaft sleeve. Double Dry Gas Seal Arrangem ent

4.10.4.3.5.1 1.

A double DGS arrangement operating continuously at a pressure level above 6.9 bar (ga) (100 psig) shall be approved by the Principal.

4.10.4.3.5.2 1.

In the case of a pressurized double seal configuration, the compressor shall be tripped immediately on pressure loss of the seal gas s upply between the seals.

2.

The seal Manufacturer shall guarantee the safe run-down of the compressor without failure of the inner seal.

4.10.4.3.6

Triple Dry Gas Seal Arr angement

4.10.4.3.6.1 1.

The triple dry gas seal arrangement shall only be considered if: a.

The tandem seal arrangement does not give sufficient sealing capabilities (e.g., requirements for which the leakage rate shall be zero under all circumstances) refer to DEP 01.00.01.30-Gen. for additional requirements.

b.

The seal operating pressure is above the experience level of the DGS Supplier.

4.10.4.3.6.2 1.

Triple DGS arrangements shall have intermediate labyrinths between the two inner and outer seals.

4.10.4.3.6.3 1.

The configuration of the two outer seals may be a double or tandem arrangement; the final configuration shall be mutually agreed between the compressor Manufacturer, DGS Supplier, and the Principal.

4.10.4.3.6.4 1.

The triple DGS support system shall follow the same philosophy as described in API STD 614 for tandem DGS arrangement.

2.

The final support system design shall be mutually agreed between the compressor Manufacturer and the Principal.

4.10.4.3.7

Single Dry Gas Seal Arr angement

4.10.4.3.7.1 1.

If approved by the Principal, a single DGS arrangement may be considered for moderate pressure, non-very-toxic (acute, environment or chronic), non-flammable services. See DEP 01.00.01.30-Gen. for definitions and requirements.


ECCN EAR99


4.10.4.3.7.2 1.

A single DGS arrangement shall be provided with a secondary/separation seal assembly comprising a pair of segmented carbon ring seals (or other approved closeclearance seals), mounted in a face-to-face configuration with inert buffer gas injected between them.

2.

The DGS/compressor Supplier shall provide evidence of the proven reliability of the proposed secondary seals in similar applications.

4.10.4.3.7.3 1.

4.10.4.3.8 1.

4.10.4.3.9

The primary leakage (i.e., the gas leaking outwards from the DGS plus the inward leaking separation gas) shall be conducted to a flare, vent, or other suitable disposal system. DGS Testing Unless otherwise agreed, DGS cartridges shall be tested in accordance with (Annex 1D) at the DGS Supplier's works prior to shipment and before assembly into the compressor. Bi-dir ection al or Uni-directi onal Design

1.

The DGS Supplier shall clearly indicate on the data/requisition sheet whether the offered DGS design is bi-directional or uni-directional.

2.

For uni-directional designs the following apply: a.

The direction of rotation shall be permanently marked on the outside of each cartridge.

b.

The compressor Manufacturer and the DGS Supplier shall ensure that inadvertent fitting of a cartridge at the wrong end of a compressor casing is physically impossible.

4.10.4.3.10 Machi nes Requir ing Barrin g 1.

If the compressor or driver needs to be rotated at low speed for the purpose of warming up or cooling down (barring/slow roll), the Manufacturer shall: a.

confirm that the dry gas seals will not be damaged by such operation

b.

warn the Principal of any special precautions to be taken.

5

Accessories

5.1

Drivers and Gearing

5.1.4

Replace the first sentence with the following: 1.

Refer to DEP 31.29.60.31-Gen. and API STD 612 for the requirements for steam turbine main drivers.

In the second sentence, replace “specified normal steam condition” with: 2. 5.1.5

specified steam conditions (minimum inlet steam condition and maximum steam outlet condition unless specified otherwise).


Refer to DEP 33.66.05.31-Gen. or DEP 33.66.05.36-Gen., and IEC 60034-1 and IEC 60034-14 and standardization agreements for the requirements for electric motor drivers.

2.

Drivers shall be capable of developing continuously the greater of the following: a.

110 % of the highest kW (hp) rating (including gear and coupling losses) required for any of the specified compressor operating conditions.


ECCN EAR99


3.

5.1.6

5.1.7

110 % of the highest kW (hp) required at the top of the power curve of the compressor at rated speed (including gear and coupling losses).

Compressor trains, driven by fixed speed motors, shall be capable of being started at the specified settling-out pressure with the suction throttle valve, if applicable, on the minimum stop. Otherwise, the fixed speed motor driver shall be capable of starting the compressor at the highest specified suction pressure.


Refer to DEP 31.29.70.31-Gen. and API STD 616 for the requirements for gas turbine drivers.

2.

Gas turbine drivers shall be sized by agreement between the Principal and the Manufacturer.


Refer to DEP 31.29.00.32-Gen. and API STD 613 for the requirements for speed increasers and reducers.

2.

Speed increasers and reducers shall be sized for the maximum power and speed of the driver under all specified operating and ambient conditions.

3.

For integral gears in compressors, see API STD 617 Part 3.

5.2

Couplin gs and Guards

5.2.2

Replace the words: “API 671” with “DEP 31.29.00.36-Gen.” Add the following to this clause:

5.2.5

1.

Non-lubricated spacer type couplings shall be used.

2.

Coupling hubs shall be hydraulically keyless fitted on the compressor shaft ends.



The coupling shall be designed so that the full rated torque of the coupling is transmitted by friction only and not by the coupling bolts’ shear load.

1.

Coupling should be balanced to ISO 1940 Grade G1 or better.

2.

Verification of coupling balance should be in accordance with ISO 10441, following clauses should be met:

5.2.7.1

a.

12.4.2 Assembly Balance Check

b.

12.4.3 Balance Repeatability Check

c.

12.4.4 Component Interchangeability Check shall be made for couplings with: i. a maximum continuous speed in excess of 5000 rpm ii. a maximum continuous speed in excess of 3000 rpm and a rating in excess of 40 MW.

5.3

Lubr icatio n and Sealin g Systems

5.3.3


Refer to DEP 31.29.60.32-Gen. for the requirements for the lubrication, shaft-sealing, and control oil systems and auxiliaries.

Add the following new clause:


ECCN EAR99


5.3.4 1.

A single oil type and viscosity grade should be selected for the complete machine train.

5.4

Mountin g Plates

5.4.1

General

5.4.1.2 5.4.1.2.1 Add the following to this clause: 1.

The casing shall be supported from the base plate by vertical supports.

2.

Shim packs for vertical alignment shall be provided between surfaces that do not have relative movement.

3.

Shim packs shall have a total thickness of at least 5 mm (0.20 in) and be made of stainless steel.

4.

Provision shall be made to support the machine whilst shims are removed or replaced.

Add the following new clause: 5.4.1.2.18

5.4.2

1.

Mounting plates for offshore facilities on steel structures shall be supplied with jacking arrangements to facilitate levelling of the mounting plate.

2.

For three point mounting, the jacking arrangement shall facilitate the removal, replacement, and positioning of each mount.

3.

The type of jacking arrangement to be used shall be subject to approval by the Principal.

Baseplates


Baseplates for units for offshore application shall comply with the following minimum requirements: a.

Unless otherwise specified, the complete compressor unit, including gear and driver, shall be mounted on a single lift base plate of structural steel. i.

2.

The only limits to the size of the base plate being those derived from transportation, installation (lifting constraints), and/or plant lay-out considerations.

b.

If specified, the baseplate shall be designed for a three-point mounting and include all auxiliary oil and shaft sealing systems.

c.

The baseplate shall be designed to minimise weight.

d.

Baseplate shall be subject to a dynamic analysis to ensure that its flexibility does not have adverse effects on the rotor dynamic behaviour of the complete train.

The complete unit shall be shipped mounted on its baseplate.

5.4.2.1.1


5.4.2.4


5.4.2.4.1



For offshore facilities, baseplates shall be suitable for column mounting.

2.

Unless otherwise specified, the baseplate shall be epoxy grouted to a concrete foundation.


ECCN EAR99

5.4.2.6


3.

The grouting shall be poured to the height of the bottom flange of all structural members, including cross-members with provision made to allow drainage of the spaces between the structural members.

4.

The structural resonant frequencies of the base plate shall be separated from the fundamental running frequencies of the compressor train by a minimum of 20 %.

Delete “ If specified,” from this clause”.


For offshore facilities, baseplates shall have machined mounting pads.

5.4.2.11 Delete “ If specified,” from this clause. Add the following new clauses: 5.4.2.14 1.

If grating is required around the perimeter of the compressor baseplate, the Manufacturer shall supply only the grating supports.

1.

Auxiliary piping to compressor supplied by the Manufacturer shall allow removal of the entire machine or machine heads.

1.

The baseplate design and layout shall consider safety, operator and maintenance efficiencies, and cost effectiveness.

2.

Piping, conduit and other auxiliary equipment shall be routed to eliminate tripping hazards.

3.

Piping and conduit shall be routed downward from the compressor and driver into troughs below the deck level and through the side of the baseplate.

5.4.2.15

5.4.2.16

a.

Grating or decking shall cover troughs below the deck level.

5.4.2.17 1.

A minimum of two grounding lugs, installed diagonally at opposite ends of the baseplate, shall be provided.

5.4.3

Soleplates and Subsol eplates

5.4.3.1


5.4.3.1.3


Anchor bolt holes shall be counter bored so that the hold-down nuts do not extend beyond the upper surface of the soleplate.

2.

The design of the sub-soleplates shall be included in the proposal.


ECCN EAR99


5.5

Control s and Instr umentation

5.5.1

General

5.5.1.2


5.5.2

Control Systems

5.5.2.2


5.5.2.3


5.5.2.4

Delete " If specified," from this clause.

5.6

Piping and Appur tenances

5.6.1

General

5.6.1.2


Refer to DEP 31.29.60.32-Gen. for the requirements for the lubricating oil, seal oil, and dry gas seal systems.

5.6.1.4 Add the following to this clause:

5.6.3

1.

For horizontally split casings, auxiliary piping shall be confined to the lower portion of the casing and be routed as close as possible to the compressor to minimize interference with normal maintenance access.

2.

For barrel type casings, the auxiliary piping on the outboard end of the casing shall be designed for easy maintenance removal including the following: a.

First flange break connections shall be located as close as possible to the compressor casing.

b.

Lube oil and seal gas supply flanges shall lie in a vertical plane to facilitate installation and checking of screens during lube oil and seal gas systems commissioning.

c.

The Manufacturer shall manifold auxiliary piping to provide a single connection for each required service, except where such manifolds would interfere with normal operating and maintenance access areas.

Process Piping Replace this clause with the following: 1.

Process piping is not generally part of the scope of supply. If process piping is part of the scope of supply, the Principal and the Manufacturer shall mutually agree on the extent and the technical requirements.

5.7

Special Tools

5.7.2.1

Delete “ If specified,” from the clause.

6

Inspecti on, Testing and Preparatio n for Shipment

6.1

General

6.1.6



ECCN EAR99


6.2

Inspection

6.2.1

General

6.2.1.5


6.2.1.6 Add the following to this clause: 1. 6.2.2

Hardness testing is required when hardness limits are applicable (e.g., hydrogen service, sour service, chlorides).

Rename this clause as: Material Inspection Certification and Marking

Add the following new clauses: 6.2.2.6

Material Certificates 1.

The Manufacturer shall furnish material certificates in accordance with ISO 10474, of the type as specified in Table 6.1. Table 6.1

Certific ation of Materials by Compresso r Part

Component

Certificate Type

Pressure containing parts (casing, end head and main process nozzles)

3.1 (and PAMI)

Shaft/impellers

3.1 (and PAMI)

Shear rings

3.1

Internals - inner barrel, diaphragms, guide channels, labyrinths, shaft sleeves, shaft seals

3.1

Bolting

3.1

All other process and auxiliary piping, flanges and connections

3.1

2.

6.2.2.7

ISO 10474

Positive alloy material identification (PAMI) shall be applied at the time of assembly to pressure containing parts, rotor shafts and impellers that are made of low-alloy steel, high-alloy martensitic steel, ferritic or austenitic stainless steel, or nickel alloys. a.

This shall be used to positively identify that the materials have the specified alloy composition.

b.

The method and procedures are subject to approval by the Principal.

Positi ve Material Identifi catio n (PMI) 1.

For acid, sour and low temperature service, all internal wetted components and casing splitline bolting shall be subject to 100% PMI. It is not only rotor and impeller that are critical, other wetted parts including sleeves, bushings, seal rings are critical to ensure the integrity of the machine and prevent Loss of Primary Containment (LOPC) or major hazards.

2.

Refer to DEP 31.10.00.10-Gen. for additional requirements on PMI.

6.3

Testing

6.3.2

Hydrost atic Test

6.3.2.1


Pressure casings SHALL [PS] be tested hydrostatically with liquid at a minimum of 1.5 times the MAWP.

2.

The minimum hydrotest pressure shall not be less than 1.5 bar (ga) (20 psig).


ECCN EAR99

3.


Hydrostatic test shall be performed only after final machining of the subject component.

6.3.2.3

Replace " 50 mg/kg (50 parts per million" with " 10 mg/kg (10 ppm)"

6.3.3

Oversp eed Test

6.3.3.1

Impell er Oversp eed Test Add the following to this clause: 1.

6.3.5

For fixed speed compressors, impeller overspeed shall be at least 121 % of rated speed.

Mechanic al Runnin g Test

6.3.5.2 6.3.5.2.1


6.3.5.9 6.3.5.9.3 6.3.5.9.3.1 Delete " If specified," from this clause. 6.3.5.9.4


6.3.5.9.6


During the mechanical running test, the lubricating oil and seal oil temperatures shall be held for a minimum period of 30 minutes at the temperature corresponding to the minimum allowable viscosity, and for 30 minutes at the temperature corresponding to the maximum allowable viscosity.

2.

Variable speed compressors shall be checked for correct rotor dynamic behaviour through their full speed range during this temperature variation.

3.

Oil pressures and temperatures and bearing temperatures shall be measured throughout the test.

6.3.5.10 6.3.5.10.3 Add the following to this clause: 1.

Shaft end seal contacts that result in a measurable change in dimension or metal transfer may be cause for rejection.

6.3.5.11 Replace this clause with the following : 1.

Mechanical contact type or dry gas seals shall not be removed after a successful running test.

2.

Subject to the approval of the Principal, oil film type shaft seals shall be removed for inspection following a successful running test.

6.3.7

Option al Tests

6.3.7.3

Gas Test After Hydr o Replace " MAWP" with " a pressure of 8 bar (ga) (115 psig)" in this clause:

6.3.7.7

Full-pressu re/Full-lo ad/Full-sp eed Test Add the following to this clause: 1.

For each component in the train, the requirements of (Part 1, clause 6.3.5.9) and (Part 2, clause 6.3.1) shall apply during full-pressure/full-load/full-speed testing.

2.

During full-pressure/full-load/full-speed testing, it is acceptable to allow overall vibration levels to increase to 150 % of the vibration criteria in this DEP.

3.

Any discrete non-synchronous vibration shall be reviewed by the Principal.


ECCN EAR99



During a full load inert test, a hydrocarbon mechanical test, or a hydrocarbon class I performance test, the overall amplitude of unfiltered vibration in any plane at any other speed within the specified operating speed range, shall not exceed the lower of the following: a. 38 µm (1.5 mils; b.

In SI Units: A = 38.1*(12 000/N)^0.5

c.

In US customary units: A = 1.5*(12 000/N)^0.5

Where: A = amplitude of unfiltered vibration, µm (mils) N = maximum continuous speed, rpm 2.

While the equipment is operating at maximum continuous speed and full load, or any other speed and/or load required by the test agenda, vibration data shall be acquired to determine amplitudes at frequencies, other than synchronous. a.

3.

6.4

This data shall cover a frequency range from 0.25 to 3 times the maximum continuous speed.

The maximum amplitude of any discrete, subsynchronous vibration shall not exceed 20% of the allowable vibration as specified in (Part 1, 4.8.2.10).

Preparation for Shipment Add the following to this clause: 1.

6.4.3

The equipment shall be shipped in the fewest possible number of base plate sections.


During the application of the rust preventive to the internals, the shaft shall be rotated slowly to ensure complete coating of all bearing and impeller surfaces.

2.

All openings shall be sealed immediately after coating.


Separately shipped parts and spare parts shall be prepared and packaged per Manufacturer’s standard preparation methods.

2.

Identification tags shall be attached to each part as well as to the outside of each box.

3.

Spare parts shall be crated separately from parts needed for initial installation.


Unless otherwise specified by Principal, each individual spare rotor shall be crated in a metal container for transportation and storage. a.

2. 6.4.3.10.1

The identification attached to spare rotor containers shall include Manufacturer serial number, the Principal’s equipment tag number, and the weight of the container, including the rotor.

Containers shall be suitable for 12 years outdoor storage in the vertical position. Delete “If specified,” from this clause.

6.4.3.12 Delete “ If specified,” from this clause. 6.4.3.13 Delete “ If specified,” from this clause.


ECCN EAR99



If vapour-phase inhibitor (VPI) or silica gel crystals in bags are installed in large cavities, either for inhibiting corrosion or absorbing moisture respectively, they should be placed so that they can be removed easily.

2.

The bags should be properly secured and their locations indicated with corrosion resistant tags.

7

Supplier’ s Data

7.1

General

7.1.4

Delete “I f specified” from this clause.

7.2

Proposals

7.2.1

General Add the following to this clause: 1.

7.2.3

Descriptions of tests, procedures, functions and other data required by any clause of this DEP or the Data Sheets shall be provided by the Manufacturer in the proposal.

Techni cal Data Add the following to sub clause f) 1.

and include the following in the proposal as separate items: a.

A spare rotor for each compressor casing;

b.

Spare couplings for all applied main couplings;

c.

Spare shaft seal cartridges for each compressor casing;

d.

Spare bearings (radial and thrust) for each compressor casing, the gearbox (if applicable), and the driver;

e.

A recommended spare parts list including, but not be necessarily limited to the following consumable and wearing parts: i. Labyrinths ii.

impeller seals

iii.

gaskets and O-rings

iv.

filter cartridges for oil, seal gas, and buffer gas.

Add the following to sub clause u): 1.

If applicable, diagrams with a description shall be included. Interconnection points with the process system shall be indicated in the diagrams.

Add the following new sub clause: x) 7.2.4

data about the selected impellers in accordance with the requirements of (4.7.10), and refer to impellers where the performance is k nown by either testing or proven service.

Curves

Add the following new sub clause: 7.2.4.2 g)

For constant-speed machines with adjustable inlet guide vanes and/or adjustable stator vanes, the performance curves shall include at least six vane positions, including the fully open and fully closed position.


ECCN EAR99


7.3

Cont ract Data

7.3.1

General


7.3.2

An engineering coordination meeting shall be held between the Manufacturer and/or the Supplier and the Principal, with the following included in the agenda: a.

relevant inspection procedures;

b.

the Supplier’s quality control program;

c.

relevant test procedures;

d.

review of the Manufacturer’s internal order sheet;

e.

review of the self-acting gas seal system.

2.

Representatives of the Manufacturers of the driver, the gearbox, if applicable, and the self-acting dry gas seals shall attend the engineering coordination meeting between the Manufacturer and/or the Supplier and the Principal.

3.

The Supplier's and/or Manufacturer’s quality control procedures shall be made available for review by the Principal at least four weeks before the coordination meeting.

Curv es and Datasheets Add the following to this clause: 1.

7.3.2.1

In addition to the requirements of (Part 2, Annex B), the schematics and drawings shall show all data of: a.

system design temperatures and heat loads

b.

relief valve settings

c.

control valve CVs

d.

equipment elevations

Curves

7.3.2.1.3


The following performance curves shall be supplied: a.

polytropic head and polytropic efficiency versus inlet flow

b.

discharge pressure, required power and discharge temperature versus inlet flow at specified inlet conditions.

7.3.2.1.5

Delete from this clause "If specified,"

7.3.2.1.6

Delete from this clause "If specified,"


Torsional and lateral critical speed maps for the “as-built” condition shall be supplied.

2.

Quadrant type performance curves shall be supplied, if specified.

7.3.3

Progress Reports

7.3.3.1

Replace “at the intervals specified” in the first sentence in this clause with: 1.

monthly or at the intervals specified.


ECCN EAR99


7.3.3.2

Delete from this clause “If specified.”

7.3.4

Parts List s and Recommended Spares

7.3.4.1


If more than one compressor is being supplied, parts interchangeability charts shall be provided.

7.3.5

Installati on, Operatio n, Maint enance, and Techni cal Data Manuals

7.3.5.1

General

7.3.5.1.1 Add the following to this clause: 1.

If the order consists of more than one compressor train, separate documentation, including manuals, shall be provided for each compressor train.

2.

The installation manual shall adequately cover the pre-startup checks, and the initial startup procedures and system checks.

3.

An electronic copy of the data manual shall be provided.

7.3.5.1.2 7.3.5.4

Delete from this clause “If specified,” Techni cal Data Manual Delete from this clause “If specified,”

Add the following new section: 8

Weight Control for Offshore Faciliti es 1.

For all equipment to be installed on an offshore facility, the Manufacturer shall comply with the following requirements.

8.1

General

8.1.1

Inform ation wit h the Proposal

8.2

1.

The Manufacturer shall provide in the proposal, estimates of the total installed mass of each compressor unit to be supplied.

2.

This mass shall include all auxiliaries and appurtenances, regardless of whether they are being supplied separately or installed on the unit.

3.

The estimate shall have an upper tolerance of 10 % or 10 kg (22 lb), whichever is the greater.

4.

If an order is placed, the Manufacturer may be required to guarantee its mass estimates prior to the order date.

Engineering Inform ation 1.

Within four weeks (or any other period, as specified) after the receipt of an order the Manufacturer shall supply the following information to the Principal for review and approval: a.

The mass and location of the centre of mass of the compressor and its main driver in the following situations: i.

b.

As intended to be shipped, included packing, shipping constraints, lifting equipment, etc.

ii.

As installed, including all auxiliaries and appurtenances;

iii.

In operation, i.e., including the normal contents of process fluid and lubricants.

The mass of any auxiliary component or system to be shipped separately.


ECCN EAR99


8.3

The mass of any component or item included in the scope of supply that has a mass greater than 200 kg (440 lb).

Weight Contro l During Manufact urin g 1.

The Manufacturer shall submit their weight control program for approval by Principal.

2.

The Principal shall be notified of any deviation of more than 5 % or 5 kg (11 lb), whichever is the greater, from the original mass estimate of (8.1) above.

3.

The Manufacturer shall be responsible for verifying the correct mass of all components and auxiliaries, as they are completed in its workshop or as they are received from sub Suppliers.

4.

When all masses of significant components have been verified; the Manufacturer shall review its initial mass estimate and confirm or modify the data by re-issuing the information as required by (8.2) not later than one month prior to the agreed shipping date of the compressor unit.

5.

Upon completion of the complete compressor unit, the Manufacturer shall re-verify the mass and issue a certificate on the final mass and centre of mass of the unit.


ECCN EAR99


Part 2

Nonint egrally Geared Centrifu gal and Axi al Compresso rs

4

General

4.4

Basic Design

4.4.1

Performance

4.4.1.1 Add the following after the first sentence of this clause: 1.

This rise shall be sufficient to result in an increase of the pressure ratio of at least 5 % when operating at specified suction conditions. a.

2.

4.

If guide vanes are provided, this requirement shall be met for each setting of adjustable inlet guide vanes or axial stator vanes.

The gradient of the tangent of the compressor head capacity curve shall: a.

decrease continuously;

b.

never increase;

c.

never become zero from stonewall capacity up to the surge point.

The stonewall capacity shall be at least 110 % of the rated capacity at rated speed. The stonewall capacity is defined in (Part 1, 3.1.67).

5.

The compressor Manufacturer shall confirm the suitability of the compressor to operate continuously at the stonewall point and any limitation on operating beyond the stonewall point.

6.

For the purpose of operational flexibility: a.

The end-of-curve (EOC) capacity is defined as the capacity at rated speed where the polytropic head is 85 % of the polytropic head at rated capacity. If applicable, the EOC capacity shall be stated in the data/requisition sheets.

b.

The turn-down (TD) capacity is defined as the capacity at the control point for the surge at rated speed. The predicted surge capacity at rated speed shall be stated in the data/requisition sheets.

c.

For identical compressors operating in parallel (if so stated in the data/requisition sheets), the respective heads at the same flow shall not differ by more than 2 % from each other at any point on the curves.

d.

The operating stability range of the compressor shall be at least 25 % of the rated point flow.


For axial compressors equipped with adjustable stator vanes for capacity and antisurge control, performance curves for polytropic head versus inlet flow shall be supplied for each stator vane setting (at least six stator vane positions including the fully open and fully closed position).

Add the following new clauses: 4.4.1.3 1. 4.4.2

For cryogenic services in particular, the temperature differential across the compressor shall be limited to 200 °C (360 °F).

Impeller Flow Coeffici ents 1.

Impeller flow coefficients as Equation 4.1 shall be within the range of 0.01 to 0.12. a. Flow coefficient: ϕ= Q1 / (D² * U)

Eqn. 4.1


ECCN EAR99


Where Q1 = inlet volume flow m³/s (ft³/s) U = impeller tip speed m/s (ft/s) D = impeller diameter m (ft) 2. 4.4.3

The Contractor shall ensure that any required model tests are included in the purchase order.

Impeller Stage Head Coeffici ents 1.

Impeller stage head coefficients as Equation 4.2 shall be within the 0.4 to 0.55 range: a. Head coefficient: ψ = Hp / U²

Eqn. 4.2.a

Where Hp= impeller stage polytropic head J/kg U = impeller tip speed m/s

Head coefficient: ψ = Hp * gc / U²

Eqn. 4.2.b

Where Hp= impeller stage polytropic head lbf ft/lbm U = impeller tip speed ft/s 2

gc = 32.2 lbm.ft/s /lbf 2. 4.4.4

The Contractor shall ensure that any required model tests are included in the purchase order.

Shaft Length-to-diameter 1.

Shaft length-to-diameter ratio L/D shall not exceed a factor of 10. Where:

L = compressor bearing span in m (ft). D = average shaft diameter under the impellers m (ft).

4.4.5

4.4.6

Impeller Inlet Mach Number 1.

Average impeller inlet Mach numbers shall be less than 0.85.

2.

On a case-by-case basis, subject to the Principal’s approval, higher numbers may be acceptable if computational fluid dynamics (CFD) results indicate that localized stalling at the impeller eye rim is minimal, and is not affected by the specified temperature and pressure variations in the impeller inlet.

3.

Transonic conditions shall not be accepted.

Machin e Mach Number 1.

Machine Mach numbers or impeller tip Mach numbers shall be less than 1.2.

2.

Higher Machine Mach numbers may be accepted by Principal approval, if the Manufacturer provides adequate references and corresponding CFD results for these designs.

4.6

Casings

4.6.1

Pressure-containi ng Casin gs Add the following to this clause: 1.

Subject to the approval of the Principal, compressor casings may be of a horizontally split design up to a MAWP of 50 bar (ga) (725 psig), which shall meet all of the following: a.

The proposal to use such a design includes sufficient and adequate references to the satisfaction of the Principal's Technical Authority.


ECCN EAR99


Where a proposed design falls at the limits of the manufacturer's proven reference range a full 3D finite element analysis (FEA) of the specific casing is provided.

c.

The Principal's Technical Authority approves this case configuration prior to the start of main component manufacturing.


If gaskets are applied, gasket materials shall be asbestos-free and suitable for the gas handled. Soft metal gaskets or O-rings are preferred. This requirement clearly prohibits the use of asbestos in any rotating equipment package. In case this prohibition is circumvented, presence of asbestos would require approval from the Principal's Technical Authority and recording on the project and the asset risk register.

2.

Gaskets in high-pressure compressors shall be suitable for high rate de-pressurisation. Unless otherwise specified, the minimum rate of de-pressurisation shall be 80 % reduction of the maximum discharge pressure within 15 minutes. If the gasket is only capable of 79% (or less) rate of de-pressurisation, a deviation would need to be raised and recorded in the project record (deviation log).


For radially split compressors, the inner casing shall be of the horizontally split design. a.

End covers (Head) shall be of a single piece.

4.6.1.9 1. 4.6.4

End covers of axial compressor casings in hydrocarbon service SHALL [PS] be of a single piece construction without a split line.


Add the following new clause: 4.6.4.1.1 1. 4.6.4.2

4.6.4.3


All casing openings for pipe connections shall be welded to the casing and flanged or, alternatively, machined and studded.

2.

All welded connections shall be full penetration butt welded.

3.

Casing openings smaller than DN 25 (NPS 1) may be self-reinforced branch fittings of the weldolet type.

Replace this clause with the following : 1.

4.6.4.4

The Manufacturer shall state in the proposal, for each nozzle, the Mach number, actual gas velocity at rated point and the maximum recommended gas velocity.

Auxiliary connections shall not be threaded.

Delete the words “If specified,”


Specially designed individual drain connections to the inner casing of a radially split barrel compressor may be threaded into the inner casing in order to facilitate disassembly of the compressor. a.

The outer casing connections shall be treated like a process connection.


ECCN EAR99


4.6.6

External Forces and Moments

4.6.6.1

Replace the last sentence of this clause with: 1.

4.6.7

For each main process nozzle, the Manufacturer shall furnish in tabular format the following data: a.

The maximum allowable forces and moments and combinations thereof for continuous operation including any transient conditions such as start-up and (emergency) shut-down;

b.

Expected nozzle movements due to thermal expansion between the cold static and normal full load operating conditions;

c.

Any expected movement, in addition to thermal effects, as a result of transient conditions.

Guide Vanes, Stators, and Stationary Internals

4.6.7.1 Add the following to this clause: 1. Refer to DEP 31.29.40.10-Gen, 5.22 for limits on AIGV use. 4.6.7.2

Replace " If specified or " with " When"

4.6.7.3


4.6.7.10.1

Except for air and inert gas compressors, the guide vane housing shall incorporate an external shell capable of providing an external purge of filtered air or inert gas. Add the following clause:

1.

All non-return valves (check valves) in compressor discharge process lines in centrifugal and axial compressor applications regardless of service shall be the annular flow non-slam type check valve.

4.6.7.11 Add the following new clause: 1.

4.6.9

Internal fasteners (bolts and nuts) in the flow path shall be positively locked in place so that under all circumstances they are prevented from entering the gas flow path and subsequently damaging the compressor.

Seal Component s

4.6.9.1 Add the following to this clause:

4.6.10

1.

Close clearance seals should be stationary labyrinths.

2.

Rotating labyrinths with stationary abraidable seal designs may be used, if proven in similar applications and shall be subject to the review and approval by the Principal.

3.

If rotating labyrinths are used, they shall be replaceable or part of a replaceable component.

Diaphragms

4.6.10.3 Replace " If specified" with the following: 1.

When recommended by the Supplier and approved by the Principal.


Diaphragms with internal liquid cooling shall not be used.

1

Compressors shall be provided with vane-less diffusers (i.e., application of vaned and low solidity diffusers (LSD) diffusers r equires approval of the Principal).

2.

Vaned diffusers and/or low solidity diffusers (LSD) shall not be applied for efficiency increase only.

4.6.12


ECCN EAR99

DEP 31.29.40.30-Gen. February 2016 Page 46 a.

They should only be applied if curve stability and/or rotating stall would otherwise be a problem and if the resultant narrowing of the operating window is acceptable in the specified service.

4.7

Rotating Elements

4.7.1

General

4.7.1.1

Add “ or wear and tear ” to the last sentence of this clause:

4.7.2

Shafts

4.7.2.1

Replace this clause with the following :

4.7.2.2

4.7.3

1

Centrifugal compressor shafts shall be made only of a single piece of forged and heat treated steel.

2.

The shaft should be forged as close as possible to the final dimensions and then suitably machined.

3.

Shafts shall not be made from hot rolled bar stock.

4.

The use of shafts made from vacuum remelted bar shall be subject to approval of the Principal.


The use of a built-up rotor construction in axial compressors in hydrocarbon services shall require the specific approval of the Principal.

2.

Individual rotor components of axial compressors which have a built-up rotor construction shall each be made of a single piece of forged, heat treated and machined steel.

Thrust Balancing

4.7.3.3

Replace this clause and sub-clause, with the following : 1.

During the factory test, balance piston flow shall be measured, monitored and recorded.


4.7.4

The proposal shall state the following: a.

The design of the balance piston seal

b.

The predicted balance piston leakage flow.

Impellers


Double flow casings or double suction impellers shall not be used, unless approved by the Principal.

1.

Single section compressors with in-line impeller arrangements shall have no more than nine impellers per casing.

2.

Two-section compressors shall have no more than eight impellers per casing.

3.

Compressors with one sidestream shall have a maximum of seven impellers per casing

4.7.4.2

a.

For each additional sidestream, the maximum number of impellers shall be reduced by one.


ECCN EAR99


4.7.4.3 1.

Refer to DEP 31.29.40.10-Gen,, 3.3.2.1 for limits on flows and impeller width.

1.

For overhung rotors, the impeller mounting on the shaft shall be subject to approval by the Principal.

4.7.4.4

4.7.5

Axi al Compresso r Rotor Bladin g Add the following to this clause: 1.

The selected axial compressor rotor and stator blading shall have proven references in similar and/or identical services to the satisfaction of the Principal. Otherwise a verification of the blade resonances shall be performed.

2.

If unreferenced axial compressor blade design is based on theoretical Campbell and Goodman diagrams, the OEM shall: a.

Perform full-scale blade testing on a representative test rig to verify these calculations.

b.

Perform A further verification by means of measurement of the actual blade stresses during a full load test of the compressor.

c.

Submit Test procedures for approval by the Principal.


4.7.5.3

Compressor blade designs that have been verified by means of a complete FEA analysis of the blades, including the stress levels at resonance conditions, are acceptable, but the same testing as in (Part 2, 4.7.5) is also required if there are no proven references.


One blade from each stage shall undergo ring testing to verify blade natural frequencies, unless the Manufacturer can produce verified testing results from previous examples.


All rotor and stator blades shall be designed for subsonic flow at every specified operating point.

2.

The Manufacturer shall verify that no transonic flow occurs at other conditions on the expected compressor map.

1.

Under any operating condition in the specified operating window of the compressor, the rotor and stator components shall be free of any resonance that may be detrimental to the life time of these components and the attached components, such as blade bushings and variable stator vane linkages.

4.7.5.7

4.8

Dynamics


For axial compressors, the Manufacturer shall demonstrate that the compressor is able to cope with the following: a.

An imperfect flow velocity profile (aero-dynamic blade performance) and temperature performance.

b.

The tolerance of blade tip clearance.


ECCN EAR99


Transient conditions such as start-up, defrosting, recycle, and/or process trip conditions shall be considered.

4.8.2 1.

2.

The application of damper seals (hole pattern, honeycomb, or other style), swirl brakes or shunt injections on the balance drum or anywhere else in the compressor shall be subject to approval of the Principal, considering the following: a.

These devices shall be considered only in compressors with standard labyrinth type impeller and balance drum seals, where their use would improve the dynamic stability of the rotor and so avoid high vibration under deviating operating conditions.

b.

These devices, intended to improve the dynamic stability of the rotor, shall not be applied in low pressure equipment;

c.

They should be evaluated for high pressure compressors.

d.

Principal should consult with PTE for guidance on adequate design review requirements.

In case of uncertainty in the initial design phase, provisional balance drum shunt injection holes may be installed in the compressor casing in order to facilitate hook up if required. a.

The corresponding performance degradation shall be indicated in the Manufacturer’s proposal and be taken into account in the overall plant performance by the Contractor.

4.9


4.9.1

General

4.9.1.1


4.9.1.3

Hydrodynamic radial and thrust bearings shall only be provided.

Replace the first sentence of this clause with the following: 1.

2.

As design criteria, bearing metal temperatures shall not exceed 100 °C (212 °F) at any specified operating conditions, and with inlet oil temperature of: a.

50 °C (120 °F) for VG32 systems;

b.

60 °C (145 °F) for VG46 systems.

Vendors shall provide bearing temperature alarm and shutdown limits on the datasheets.


Shaft or shaft bearings with specific rotor dampening features, (e.g., damper bearings or overhung damper), or any other separate viscous dampening features, shall not be used.

2.

If deemed necessary by the Manufacturer, these features shall be subject to approval by the Principal. a.

The Compressor OEM shall demonstrate that the compressor will be able to operate without the dampening device and avoid any damage to the rotor or the stationary compressor internals or shaft seals.

b.

Principal should consult with PTE for guidance on adequate design review requirements.


ECCN EAR99


4.9.2

Hydrody namic Radial Bearings

4.9.2.3

Replace in this clause “If specified” with “ Only when approved by Principal” Add the following to this clause: 1.

When selected, copper-alloy bearings shall have hardened steel inserts for support.


The bearing design shall suppress hydrodynamic instabilities and provide sufficient damping over the entire range of allowable bearing clearances to limit rotor vibration to the maximum specified amplitudes, see (Part 1, 4.8.8.8), while the equipment is operating loaded or unloaded, including operation at any critical frequency within the specified operating speed range.

1.

Spherical seat pad bearings shall not be used without approval of the Principal.

1.

Radial bearings shall have two metal temperature sensors (typically dual element) within the expected load zone, as per DEP 32.29.20.10-Gen. and API 670.

2.

The load-bearing pad and one adjacent downstream pad shall have bearing-metal temperature sensors, as per DEP 32.29.20.10-Gen. and API 670.

4.9.2.6

4.9.2.7

4.9.3

Hydrody namic Thrust Bearings


The thrust capability of the bearing with reverse rotation shall be stated in the proposal.


2

Bearings shall have a unit load limit no greater than 1.7 N/mm (250 psi), unless otherwise approved by the Principal.


The Manufacturer shall provide rotor thrust balance calculations and the associated specific thrust bearing loading, as a part of the design review meeting.


4.9.4

1.

Thrust bearings shall have five metal temperature sensors, three on the active side and two on the inactive side, as per DEP 32.29.20.10-Gen. and API 670.

2.

Metal temperature sensors shall be located in the highest loaded part of the pad, as per DEP 32.29.20.10-Gen. and API 670.

3.

If tilting pad bearings are used, each metal temperature sensor shall be installed in a separate bearing pad, as per DEP 32.29.20.10-Gen. and API 670.

4.

Bearing-metal temperature sensors shall not be in adjacent pads, on both the active and inactive sides of the bearing, as per DEP 32.29.20.10-Gen. and API 670.

Bearing Housing s Add the following to this clause: 1.

Bearing brackets shall be suitably doweled, with hardened cylindrical dowels, to the casing so that no further internal alignment of the rotor is required, once installed at site.


ECCN EAR99



Each compressor/driver unit shall be provided with the following: a.

Two radial vibration displacement type probes at each radial bearing, located at an angle of 90 degrees to one another;

b.

Three axial position displacement probes at each thrust bearing;

c.

A shaft rotation phase reference transducer (once per turn angular reference);

d.

If gearbox transmission is used, a shaft rotation phase reference transducer for both high and low speed shafts shall be installed.

e.

Probes and their installation shall be as described in API STD 670 and as per DEP 32.29.20.10-Gen.

4.9.4.5 1.

Bearing temperature measuring devices shall terminate at a terminal strip inside the bearing housing or in a terminal head on the outside of the casing.

2.

Extension wires from the terminal strip shall be routed to Manufacturer supplied junction boxes in flexible electrical conduit or in cable trays, per project specification.

1.

Oil and instrument connections shall be in the lower half of the bearing housing to eliminate the need for removal during bearing inspection and maintenance.

4.9.4.6

5

Accessories

5.5

Contro ls and Instr umentatio n


Capacity control of centrifugal compressors with adjustable inlet guide vanes shall be subject to approval by the Principal.

Replace the first sentence of this clause with: 1.

For constant-speed axial compressors, the control of the adjustable stator vanes shall be furnished by the Manufacturer as an integral part of the compressor.


5.5.5

Variable stator vane control mechanisms shall meet the following: a.

a proven design;

b.

include positive locking of all components under all operating conditions;

c.

provide an accurate stator vane position signal back to the control loop.

Alarms , Shutdow ns, and Contro l Systems Add the following to this clause: 1.

Refer to DEP 31.29.00.11-Gen. for additional guidance and requirements on alarms, shutdowns and controls.

2.

The Manufacturer shall supply a list of alarms and/or shutdowns for the entire compressor train.

3.

The recommended set points for all these alarms and/or shutdowns shall be included.

4.

The list shall include, but not be limited to: a.

speed (when variable speed);


ECCN EAR99

5.5.7


radial bearing vibrations;

c.

radial and axial bearing temperatures;

d.

axial displacement position/limit of the rotor(s;)

e.

lube and control oil system parameters;

f.

oil seal or dry gas seal systems parameters;

g.

operational process gas conditions/limitations.

Vibration , Positi on, and Bearing Temperature Detectors

For all clauses of 5.5.7, replace “API 670” with “API 670 and DEP 31.29.00.11-Gen.”. Add the following new clause: 5.5.7.7 1.

All wire entries into the compressor casings or bearing housings shall be fully sealed against leakage into the environment and wiring conduits.

5.6

Piping and Appu rtenances

5.6.1

General

5.6.1.2

Replace “If specified” with “When specified by Principal”

5.6.2

Process Piping Replace “ API 614, Fifth Edition” with “DEP 31.29.60.32-Gen.”

6

Inspecti on, Testing and Preparatio n for Shipment

6.3

Testing

6.3.1

Mechanical Running Test

6.3.1.1 6.3.1.1.3

Delete "If specified" from this clause.

6.3.1.1.4

Replace "API 614, Fifth Edition" with "DEP 31.29.60.32-Gen."

6.3.1.2 6.3.1.2.2

Replace the third sentence of this clause with the following: 1.

The amplitude of any discrete, non-synchronous vibration shall not exceed 20% of the allowable vibration as specified in (Part 1, 4.8.8.8), under any load condition.


Subject to the approval of the Principal, spare rotors for compressors may be exempted from the mechanical running test, provided the following conditions are met: a.

Both main and spare rotors have been balanced at high speed in accordance with the requirements of (Part1, 4.8.8.3) to (Part 1, 4.8.8.7).

b.

The first rotor has successfully completed the mechanical running test and the performance test.

c.

The spare rotor is subjected to a trial fit/rotation/float test in the casing.


ECCN EAR99


6.3.2.3

Replace “ if specified” with “ when specified by Principal”

6.3.3

Optional Tests

6.3.3.1

Factor y Perfor mance Test

6.3.3.1.1


The performance test shall demonstrate the compliance of the aerodynamic performance with the requirements of (Part 1, 4.4.1.1.1).

2.

For variable speed compressors, the surge line shall be established between minimum governor and maximum continuous speeds by means of additional points. a.

For sidestream compressors, a minimum of eight points on the curve shall be verified.

3.

Compressors with sidestreams shall have a minimum of eight temperature probes installed in each stage to determine the stage exit temperatures.

4.

Both pressure and temperature shall be measured at four locations of the impeller inlet, as well as in the sidestream.

5.

Axial compressors shall have the performance map tested at least six stator vane settings, including fully open and fully closed. a.

6.3.3.1.4

At each setting, five points, including surge and overload, shall be measured.


The speed required to achieve the specified performance and related tolerances shall be less than originally stated maximum continuous operating speed (MCOS).

6.3.3.1.4.1 Add the following to this clause: 1.

Following a design point speed or MCOS change, the original design requirements related to speed shall be confirmed to be still valid and applicable documents and reports shall be updated to reflect new speed ranges.

2.

Examples of elements that shall be updated include, but are not limited to:

6.3.3.1.6

a.

Lateral and Torsional Rotordynamic reports and required separation margins

b.

Impeller Overspeed testing and Impeller dynamic analysis

c.

Train Overspeed limits and protection"


6.3.3.1.7

All design documents shall be updated to reflect hardware modifications. Replace this clause with the following:

1.

All compressor bundles and rotor shall be performance tested,

2.

If duplicate or spare bundles are proposed to not receive performance testing, this shall be accompanied by economic justification and risk evaluations and subject to approval by the Principal.

6.3.3.1.8


If specified in the data/requisition sheets, multi-section compressors, in either a single or multiple casing, shall be tested per section in accordance with (Part 2, 6.3.3.1).

2.

Each section shall comply with the requirements of (Part 1, 4.4.1.1.1).

3.

Individual sectional head (pressure) tolerances shall be as specified in the data/requisition sheets.

4.

Unless otherwise specified, the combined power of all sections involved shall not exceed the limits of (Part 2, 6.3.3.1.3 through 6.3.3.1.5) at the specified guarantee point, but no individual section shall exceed 106 % of the power value specified for that section.


ECCN EAR99


5

Compressors with sidestreams shall have their guarantee points per section as indicated on the data/requisition sheets.

6.

If specified in the data/requisition sheets, multi-section compressors in either a single or multiple casing shall be guaranteed and tested for each section in accordance with (Part 2, 6.3.3.1).


If specified in the data/requisition sheets, the performance shall be guaranteed by the Manufacturer within the additional tolerances specified below: a.

The flow at surge point shall not be higher than predicted (have 0% positive tolerance) compared to the predicted surge flow.

b.

The actual head rise from rated flow to surge shall have a ±2% deviation tolerance from the predicted head rise.

c.

Any sidestream discharge pressure at rated flow shall be within a +0% to -5% tolerance.

d.

The differential pressure of any sidestream suction pressure at rated flow and at the compressor rated suction pressure shall be within a +0% to -5% tolerance."

6.3.3.1.11 1.

The contract seals shall be used during the performance test. On applications with dry gas seals, the following flows shall be measured during the performance test: a.

dynamic seal leakage during the test

b.

static leakage before and after the test

c.

seal gas and buffer gas flows

d.

separation gas flows

2.

The dynamic seal leakage measurement shall be performed at a speed and sealing pressure as close as possible to the conditions of the seal Manufacturer's shop test (see Annex F API STD 617).

3.

The measured leakage rates may be adjusted for differences in conditions (e.g., pressure, temperature and speed) between the performance test and seal Manufacturer's shop test by means agreed between the Manufacturer and the Principal prior to the test.

4.

The seal shall be acceptable if the adjusted leakage rates are within 150 % of the accepted seal Manufacturer's shop test results and the seal gas and buffer gas flows are within the allowable range.

6.3.3.1.12 1.

During performance testing, the original internal clearances and tolerances shall be maintained.

2.

Increasing the clearances of the balance drum and/or other close clearance points with a subsequent performance correction is not permitted.

6.3.3.1.13 1.

Reynolds number correction in accordance with ASME PTC 10 shall not be carried out in the calculation of compressor performance for class 2 tests.

2.

Alternative Reynolds number corrections and dedicated Reynolds correction methods for very high pressure applications may be proposed by the Manufacturer.


ECCN EAR99


6.3.3.1.14 1.

In the performance test procedure, the Manufacturer shall quantify all flows and correction factors for interstage losses, balance losses, and other such losses to be considered.

2.

The performance procedure including these calculations shall be subject to the Principal's approval before the actual performance test.

6.4

Preparation for Shipment

6.4.1

Delete “if specified” from this clause

An nex B (informative) Vendor (Supplier) Data and Drawing Requir ements B.2

Descriptions 27 c.

Delete from item 27c the words “ when specified”


ECCN EAR99


Part 3

Integrally Geared Centrifug al Compresso rs

4

General

4.4

Basic Design

4.4.1

Performance

4.4.1.1

Replace the first sentence in this clause with the following : 1.

Each compressor stage head-capacity characteristic curve shall rise continuously from the rated point to predicted surge.

2.


3.

4.



decrease continuously

b.

never increase

c.

never become zero from stonewall capacity up to the surge point

The stonewall capacity shall be at least 110 % of the rated capacity at rated speed. a.

Stonewall capacity is defined in (Part 1, 3.1.67)

5.


6.

For the purpose of operational flexibility:

7.

a.


b.


c.


d.


The compressor, without the use of a bypass, shall be suitable for continuous operation at any capacity at least 10 % greater than the predicted surge capacity shown in the proposal.

4.6

Casings

4.6.4


4.6.4.2

Aux iliary Connectio ns

4.6.4.2.1 Add the following to this clause: c)

Auxiliary connections shall not be threaded.


ECCN EAR99

4.6.7


Variable Inlet and/or Diffus er Guide Vanes Add the following to this clause: 1.

Compressors shall be provided with vane-less diffusers.

2.

Vaned diffusers and/or low solidity vaned (LSV) diffusers shall not be applied for efficiency increase only. a.

3.

They should only be applied if curve stability and/or rotating stall would otherwise be a problem and if the resultant narrowing of the operating window is acceptable in the specified service.

High-speed, integrally geared compressors may be provided with vaned diffusers, if this is the Manufacturer’s standard design and subject to the Principal’s approval.


Refer to DEP 31.29.40.10-Gen, Section 5.22 for requirements related to AIGV

4.7

Rotating Elements

4.7.3

Thrust Balancing Add the following to this clause: 1.

No thrust reversal shall occur at any load condition.

4.8

Dynamics

4.8.1


Lateral evaluation of bull gear and pinion shall reflect the variable gear forces on the bearings (as typically done in an API STD 613 gear lateral analysis).

4.9


4.9.1

General

4.9.2

Hydrod ynamic Radial Bearings

4.9.2.2


Copper alloy backed tilt pads shall not be used.


The following bearing design elements shall not be used without approval of the Principal: a.

spherical seat pad design;

b.

squeeze film dampening features;

c.

any other separate bearing dampening features.

4.9.2.5 1.

Radial bearings shall have two metal temperature sensors in the expected load zone (as per DEP 32.29.20.10-Gen. and API 670).

2.

If tilting pad bearings are used, each temperature sensor shall be installed in a separate pad (as per DEP 32.29.20.10-Gen. and API 670.

4.9.3

Hydrod ynamic Thrust Bearings

4.9.3.2


Bearings shall be tilting pad on one or both sides.


ECCN EAR99

4.9.3.3




2.

During the design review meeting, the Manufacturer shall provide all details of the rotor thrust balance calculations and the associated specific thrust bearing loading, in order to demonstrate compliance with the requirements of (4.9.3.4).

3.

The Manufacturer’s primary offering shall be direct lubricated, low oil consumption bearings. As an alternative, the Manufacturer may offer its standard flooded bearing design.

4.

In the proposal, the Manufacturer shall state the power demand difference between the two thrust bearing designs, if applicable.


Thrust bearings shall be arranged to allow axial positioning of each rotor relative to the casing and adjustment of the bearing clearance.

1.

Each pad within one side of the thrust bearing shall be designed and manufactured with dimensional precision that allow interchange or replacement of the individual pads, except for instrumented pads.

1.

Thrust bearings shall have five metal temperature sensors, three on the active side and two on the inactive side ( as per DEP 32.29.20.10-Gen. and API 670).

2.

Metal temperature sensors shall be located in the highest loaded part of the pad (as per DEP 32.29.20.10-Gen. and API 670).

3.

If tilting pad bearings are used, each metal temperature sensor shall be installed in a separate bearing pad (as per DEP 32.29.20.10-Gen. and API 670).

4.

Bearing metal temperature sensors shall not be mounted in adjacent pads on either the active and inactive sides of the bearing (as per DEP 32.29.20.10-Gen. and API 670).

4.9.3.6

4.9.3.7

4.9.4

Bearing Housing s


4.11

1.

Bearing temperature measuring devices shall terminate at a terminal strip inside the bearing housing.

2.

Extension wires from the terminal strip shall be routed to Manufacturer supplied junction boxes.

Integral Gearin g


Permanent coatings or paint shall not be applied to the interior of the casing.

4.11.1.8 Replace this clause with the following : 1. 4.11.3

Gearboxes shall be provided with a flanged-and-blinded purge gas connection.

Gear Rating


Shafts shall not be made from hot rolled bar stock.


ECCN EAR99

2.


The use of shafts made from vacuum remelted bar shall be subject to approval of the Principal.

5

Accessories

5.1

Drivers Add the following to this clause: 1.

Integrally geared compressors shall not be externally driven through the pinion shaft The exception for drive pinions is where one or both wheels on a pinion shaft are expander wheels.

5.3

Lubri cation and Sealing Systems

5.3.1


The compressor/gear and driver shall have a common forced feed lube oil system.

5.4

Mountin g Plates

5.4.1


5.4.3

The oil reservoir shall be integral with the baseplate.


When machined mounting pads as indicated in (5.4.2) have been specified, the Supplier shall also supply the soleplates needed for field installation.

5.5

Control s and Instru mentation

5.5.2

Control Systems


Capacity control of centrifugal compressors with adjustable inlet guide vanes shall be subject to approval by the Principal.

2.

Variable diffuser vanes for capacity and/or head control shall not be applied for flammable, very toxic-acute, very toxic-chronic, very toxic-environment, fouling, or corrosive gases. a.

5.5.5

For any other gases, application shall be subject to approval by the Principal.

Alarms and Shutdow ns Add the following to this clause: 1.

Refer to DEP 31.29.00.11-Gen. for additional guidance and requirements on alarms, shutdowns and controls.

2.

The Manufacturer shall supply a list of alarms and/or shutdowns for the entire compressor train.

3.

The recommended set points for all these alarms and/or shutdowns shall be included.

4.

The list shall include, but not be limited to the following: a.

radial bearing vibrations

b.

radial and axial bearing temperatures

c.

axial displacement of the rotor(s)

d.

lube and control oil system parameters


ECCN EAR99


5.5.7

Vibration , Posit ion, and Bearing Temperature

5.5.7.3


5.5.7.6


5.5.7.7

A bearing temperature monitor shall be supplied and calibrated in accordance with API STD 670 and as per DEP 32.29.20.10-Gen.


5.5.7.8

Radial shaft vibration and axial position monitors shall be supplied and calibrated in accordance with API STD 670 and as per DEP 32.29.20.10-Gen.

An accelerometer shall be supplied, installed at the shaft on the gearbox, and calibrated in accordance with API STD 670 and as per DEP 32.29.20.10-Gen.


An accelerometer monitor shall be supplied, installed and calibrated in accordance with API STD 670 and as per DEP 32.29.20.10-Gen.


All wire entries into the compressor casings or bearing housings shall be fully sealed against leakage into the environment and wiring conduits.

5.6

Piping and Appu rtenances

5.6.2

Process Piping and Acc essori es

5.6.2.3


If process heat exchangers are supplied by the Manufacturer, the basis of design shall be mutually agreed between the Manufacturer and the Principal.


Air compressors with carbon steel system, should install an interstage, notched gate valve (always bleeding) for moisture removal. This is not necessary for air compressors with Stainless Steel systems.

6

Inspecti on, Testing, and Preparation for Shipment

6.3

Testing

6.3.1


6.3.1.3.5

Delete “If specified,” from this clause.

6.3.1.3.6

Delete “If specified,” from this clause.

6.3.1.3.7


6.3.2

Ass embled Compresso r Gas Leakage Test

6.3.1.3.7


6.3.3

Optional Tests

6.3.3.1

Perfor mance Test

6.3.3.1.5


If specified in the data/requisition sheets, multi-section compressors, in either a single or multiple casing, shall be tested per section in accordance with (Part 2, 6.3.3.1).


ECCN EAR99

6.4 6.4.1.1


2.

Each section shall comply with the requirements of (Part 1, 4.4.1.1.1).

3.

Individual sectional head (pressure) tolerances shall be as specified in the data/requisition sheets.

4.

Unless otherwise specified, the combined power of all sections involved shall not exceed the limits of (Part 2, 6.3.3.1.2 and 6.3.3.1.3) at the specified guarantee point, but no individual section shall exceed 106 % of the power value specified for that section.

5

Compressors with sidestreams shall have their guarantee points per section as indicated on the data/requisition sheets.

Preparatio n for Shipment Delete “ If specified,” from this clause.

An nex B (informative) Vendor (Supplier) Data and Drawing Requir ements B.2

Descriptions Modify items c) and d) of item 31) “ Mechanical running test report to include the following” with the following: c)

delete “when specified” from this clause

d)

replace “when specified tape recordings” with “digital record of test using monitoring system”


ECCN EAR99


Part 4

Expander-compresso rs

4

General

4.4

Basic Design

4.4.2

Add the following after the first sentence of this clause: 1.


2.

3.



decrease continuously

b.

never increase

c.

never become zero from stonewall capacity up to the surge point

The stonewall capacity shall be at least 110 % of the rated capacity at rated speed. a.

Stonewall capacity is defined in (Part 1, 3.1.67).

4.


5.

For the purpose of operational flexibility: a.


b.


c.


d.


4.7

Rotating Elements

4.7.4

Impellers

4.7.4.1

Thrust Balancing Add the following to this clause: 1.

No thrust reversal shall occur at any load condition.

4.8

Dynamics

4.8.1

Vibration Balancing

4.8.1.6


4.8.1.7

Residual Unbalanc e Procedure Delete “ If specified,” from this clause.


ECCN EAR99


4.9


4.9.1

General

4.9.1.2


4.9.2

Magnetic bearings shall be supplied in accordance with (Part 1, Annex E).

Hydrody namic Radial Bearings


The bearing design shall suppress hydrodynamic instabilities and provide sufficient damping over the entire range of allowable bearing clearances to limit rotor vibration to the maximum specified amplitudes (Part1, 4.8.8.8), while the equipment is operating loaded or unloaded, including operation at any critical frequency within the specified operating range.

2.

The following bearing design elements shall not be used without approval of the Principal: a.

spherical seat pad design;

b.

squeezed film dampening features;

c.

any other separate bearing dampening features.


4.9.3

1.

Radial bearings shall have two metal temperature sensors in the expected load zone.

2.

If tilting pad bearings are used, each temperature sensor shall be installed in a separate pad.

Hydrody namic Thrust Bearings



2.

During the design review meeting, the Manufacturer shall provide all details of the rotor thrust balance calculations and the associated specific thrust bearing loading in order to demonstrate compliance with the r equirements of (4.9.3.4).


Thrust bearings shall have five metal temperature sensors, three on the active side and two on the inactive side (as per DEP 32.29.20.10-Gen. and API 670).

2.

Metal temperature sensors shall be located in the highest loaded part of the pad.

3.

If tilting pad bearings are used, each metal temperature sensor shall be installed in a separate bearing pad.

4.

Bearing metal temperature sensors shall be mounted in every other pad on both the active and inactive sides of the bearing.


ECCN EAR99

5

Accessories

5.5

Control s and Instr umentation

5.5.2

Hydrody namic Bearings

5.5.2.1

Delete “ Unless otherwise specified,” from this clause.

5.5.2.2


5.5.2.3




All wire entries into the compressor casings or bearing housings shall be fully sealed against leakage into the wiring conduit."

5.5.4

Overspeed Shutdow n System

5.5.4.1

General

5.5.4.1.1

Delete this clause.

5.5.4.1.2


A separate overspeed shutdown system based on two-out-of-three voting logic shall be furnished.

5.5.5

Permanent Strai ner

5.5.5.2


When a permanent strainer is present, it shall have spool piece and permanent pressure instrumentation.

5.5.5.4


6

Inspecti on, Testing, and Preparatio n for Shipment

6.3

Testing

6.3.3


6.3.3.1.1

Delete “ Unless otherwise agreed,” from this clause.

6.3.3.1.2

Add the following to this clause. 1.

Principal shall be advised when test compressor wheel will be used.

6.3.3.3 6.3.3.3.5 6.3.3.4 6.3.3.4.2 6.4

Delete “ if specified” from this clause. Delete “ if specified” from this clause. Delete “ if specified” from this clause. Preparatio n for Shipment Delete the words “ and the following in this section” from this clause:

6.4.1

Delete this clause.


ECCN EAR99


Annex B (informative) Vendor (Supplier) Drawing and Data Requirements B.2

Descriptions Modify items c) and d) of item 29) “ Mechanical running test report to include the following ” with the following: c)

delete “when specified” from this clause

d)

replace “when specified tape recordings” with “digital record of test using monitoring system”


ECCN EAR99


PART IV REFERENCES In this DEP, reference is made to the following publications: NOTES:

1. Unless specifically designated by date, the latest edition of each publication shall be used, together with any amendments/supplements/revisions thereto. 2. The DEPs and most referenced external standards are available to Shell staff on the SWW (Shell Wide Web) at http://sww.shell.com/standards/.

SHELL STANDARDS DEP feedback form

DEP 00.00.05.80-Gen.

Determination of temperature, pressure, and toxicity levels

DEP 01.00.01.30-Gen.

Positive Material Identification (PMI) program

DEP 31.10.00.10-Gen.

Data/requisition sheet for equipment noise limitation

DEP 31.10.00.94-Gen.

Metallic materials - prevention of brittle fracture in new assets

DEP 31.10.02.31-Gen.

Condition monitoring of rotating equipment

DEP 31.29.00.11-Gen

Special-purpose gear units for petroleum, chemical and gas industry services (amendments/supplements to API 613)

DEP 31.29.00.32-Gen.

Flexible couplings for mechanical power transmission - special purpose applications (amendments/ supplements to ISO 10441)

DEP 31.29.00.36-Gen.

Safeguarding and instrumented protective functions for rotating equipment

DEP 32.29.10.10-Gen.

Safeguarding and instrumented protective functions for rotating equipment

DEP 32.29.20.10-Gen.

Special-purpose steam turbines (amendments/supplements to ISO 10437)

DEP 31.29.60.31-Gen.

Lubrication, shaft-sealing and control oil systems and auxiliaries (amendments/supplements to ISO 10438)

DEP 31.29.60.32-Gen.

Gas turbines for the petroleum, chemical, and gas industry services (amendments/supplements to API STD 616)

DEP 31.29.70.31-Gen.

Electrical machines - Cage-induction types (amendments/supplements to IEC 60034-1 and IEC 60034-14)

DEP 33.66.05.31-Gen.

MV induction motors for North American application (amendments/supplements to API 541)

DEP 33.66.05.36-Gen.

Selection of materials for life cycle performance (upstream equipment) including H 2S-containing environments (amendments and supplements to ISO 15156:2009)

DEP 39.01.10.12-Gen.

Shell HSSE & SP Control Framework, Design Engineering Manual (DEM) 1 – Application of Technical Standards

DEM1

https://eu001sp.shell.com/sites/AAAAA8432/CF/Web/Design Engineering Manual 1 DEM1.aspx

AMERICAN STA NDARDS Lubrication, Shaft-sealing and Oil-control Systems and Auxiliaries

API STD 614

Axial and Centrifugal Compressors and Expander-compressors

API STD 617

Machinery Protection Systems

API STD 670

Special-purpose Couplings for Petroleum, Chemical, and Gas Industry Services

API STD 671

Performance test code on compressors and exhausters

ASME PTC 10


ECCN EAR99


Boiler and Pressure Vessel Code: Section V: Non-destructive examination

ASME V

Section VIII: Rules for Construction of pressure vessels

ASME VIII

Section IX: Welding and brazing qualifications

ASME IX

Standard specification for alloy-steel and stainless steel bolting materials for high-temperature or high pressure service and other special purpose applications

ASTM A193

Standard Practice for Ultrasonic Examination of Steel Forgings

ASTM A388

Standard specification for ferritic ductile cast iron pressure-retaining castings for use at elevated temperatures

ASTM A395

Standard practice for steel castings, welding, qualifications of procedures and personnel

ASTM A488

Standard specification for austenitic ductile cast iron castings for pressure-containing parts suitable for low-temperature service

ASTM A571

Standard specification for ultrasonic angle-beam examination of steel plates

ASTM A577

Standard Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications

ASTM A578

Standard practice for ultrasonic examination of austenitic steel forgings

ASTM A745

Standard specification for through-thickness tension testing of steel plates for special applications

ASTM A770

Standard practice for steel castings, surface acceptance standards, visual examination

ASTM A802

Standard Practice for Ultrasonic Testing of Metal Pipe and Tubing

ASTM E213

Standard Material Requirements - Materials Resistant to Sulfide Stress Cracking in Corrosive Petroleum Refining Environments

NACE MR0103

Petroleum and natural gas industries Materials for use in H 2S-containing environments in oil and gas production –

NACE MR0175

Part 1: General principles for selection of cr acking-resistant materials; Part 2: Cracking-resistant carbon and low alloy steels, and the use of cast irons; Part 3: Cracking-resistant CRAs (corrosion-resistant alloys) and other alloys INTERNATIONAL STANDARDS Rotating electrical machines – Part 1: Rating and performance

IEC 60034-1

Rotating electrical machines – Part 14: Mechanical vibration of certain machines with shaft heights 56 mm and higher – Measurement, evaluation and limits of vibration severity

IEC 60034-14

Mechanical vibration — Balance quality requirements for rotors in a constant (rigid) state — Part 1: Specification and verification of balance tolerances

ISO 1940

Quality management systems — Requirements

ISO 9001

Approval testing of welders — Fusion welding

ISO 9606

Petroleum and natural gas industries — Flexible couplings for mechanical power transmission — Special purpose applications

ISO 10441


Axial, Centrifugal and Expander Compressors - DeP 31.29.40.30

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