Base Line Specification for Vessels & Piping

CONTENTS 1.

AL DABB’IYA SURFACE SURFACE FACILITIES-PHASE III DESCRIPTION ................ ......... ....... 4

2.

PURPOSE OF THIS SPECIFICATION ......................................................... 6

3.

DEFINITIONS AND ABBREVIATIONS ......................................................... 9

4.

REFEREN REFERENCES CES ................................. ................................................. ................................. ................................. ......................... ......... 10 4.1

PROJECT SPECIFICATIONS................... ......... ................... ................... ................... .................. ........... 10

4.2

ADCO SPECIFICATIONS SPECIFICATIONS ................... ......... ................... .................. ................... ................... ................ ....... 11

4.3

SHELL SHELL DEP ............................... ................................................ ................................. ................................. .................... ... 11

4.4

International Industry Standards ..................................................... 11

5.

WORK STEPS FOR BASELINE THICKNESS T HICKNESS SURVEY SURVEY ............... ............. ......... .... 11

6.

BASELINE PROCEDURE PROCEDURE FOR PIPING .................. ......... .................. ................... ................... ................ ....... 13

7.

6.1

SELECTION OF REPRESENTATIVE REPRESENTATIVE LINES ................... .......... ................... ............... ..... 13

6.2

SUSCEPTIBLE AREAS OF INTERNAL CORROSION AND/OR EROSION EROSION ............................... ................................................ .................................. ................................. ...................... ...... 13

6.3

THICKNESS MONITORING LOCATIONS FOR PIPING SYSTEMS SYSTEMS............................... ................................................ .................................. ................................. ...................... ...... 15

6.4

PROCEDURES PROCEDURES OF O F TML SETTING FOR PIPING SYSTEM ............ .......... .. 16

6.5

THICKNESS MEASUREMENT POINTS PER TML (GENERAL RULE) RULE) ................................ ................................................ ................................. .................................. ............................ ........... 17

6.6

PREPARATION FOR BASELINE THICKNESS SURVEY ............... .......... ..... 17

6.7

BASELINE THICKNESS SURVEY SURVEY AT SITE ................. .................. .......... ........ 18

6.8

GUIDELINE FOR TML SETTING.................. ......... ................... ................... ................... ............... ..... 20

6.9

RECORDING FORMAT FOR BASELINE THICKNESS T HICKNESS THICKNESS SURVEY .................................................................... 26

BASELINE PROCEDURE PROCEDURE FOR EQUIPMENT .................. ......... ................... ................... ................ ....... 27 7.1

SELECTION OF STATIC EQUIPMENT FOR BASELINE THICKNESS SURVEY .................................................................... 27

7.2

SETTING OF TMLS FOR STATIC EQUIPMENT .................. ......... .................. ........... 28

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610

SPECIFICATION FOR BASELINE SURVEY FOR EQUIPMENT AND PIPING

PAGE : 2 of 49

ORIGINATOR No. 3844-VZ-SG-GA000033 Directory Path

ADCO Project No. P02605

Rev.01

Date : 28/10/2015

8.

7.3

BASELINE SURVEY EXECUTION LOCATION (VENDOR VS SITE) ................................. ................................................. ................................. .................................. ............................ ........... 30

7.4

PREPARATION FOR BASELINE THICKNESS SURVEY ............... .......... ..... 31

7.5

BASELINE THICKNESS SURVEY.................. ......... .................. ................... ................... ............. .... 32

7.6

GUIDELINE FOR TML SETTING FOR PRESSURE VESSEL ........ 35

7.7

GUIDELINE FOR TML SETTING FOR STATIC EQUIPMENT NOZZLES (WHEN APPLICABLE)................................................... 41

7.8

RECORDING FORMAT FOR BASELINE THICKNESS SURVEY ... 44

DETAILS OF INSPECTION PLUGS AND MARKING LABELS FOR TMLS 45 8.1

APPLIED READY-MADE READY-MADE INSULATION PLUG PLUG OF TMLS ............... .......... ..... 45

8.2

RECOMMENDED SIZE OF READY-MADE INSPECTION PLUG FOR PIPING AND PRESSURE PRESSURE VESSEL NOZZLES ................. ....... ............... ..... 47

8.3

APPLIED MARKING MARKING LABEL OF TMLS FOR BARE BARE PIPING AND PRESSURE VESSEL ..................................................................... 48

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 3 of 49



Rev.01

Date : 28/10/2015

1.

AL DABB’IYA SURFACE

FACILITIES-PHASE FACILITIES-PHASE III II I DESCRIPTION

The scope of Al Dabb’iya surface Facilities Phase III involves increasing the production by an additional 73 MBOPD to achieve a total Dabb’iya Production of 145 MBOPD by year 2018. The above shall be achieved by drilling 114 wells which include 59 oil producers and 55 injectors. Dabb’iya Phase III exercises its development in both existing clusters and new clusters. Existing clusters shall undergo several brownfield modifications. modifications. Below is a brief description of the surface facilities in addition to the cluster and wellhead facilities.

1.1

NEW CLUSTERS/GATHERING CLUSTERS/G ATHERING STATIONS FOR PRODUCTION AND INJECTION The existing Al Dabb’iya field is developed by means of mixed producer wells, injector well clusters and a number of remote wells. Al Dabb’iya field shall be developed by means of the following clusters: •

9 new onshore clusters, 4 of which (CLS-Q, CLS-S, CLS-T, CLS-Z) are on Bu Labyad Island

•

2 new offshore offshor e clusters (CLS-U and CLS-V)

77 mixed production and injection wells shall be accommodated between these new clusters. In addition, 37 new Phase III wells shall be added within the existing 6 well clusters; 2 offshore (CLS-A and CLS-B) and 4 onshore (CLS-D, CLS-F, CLS-N and CLS-P), requiring expansion of manifold, trunk lines, and associated systems/equipment. systems/equipment. Part of the core scope of the project is to de-bottleneck the capacity constraint of the existing MP compressor and to restrict to 132 MMSCFD technical (110 MMSCFD sustainable). For this purpose, diversion of high GOR wells enables relieving the gas load on the existing CPP Phases I/II. A total of 9 high GOR wells are diverted and distributed among CLS-A, CLS-B and CLS-F. Note that only one new oil producer (P8) in CLS-N shall be routed to connect to existing Trunkline-02. This diversion scope also contributes to the requirement of offloading 30 MBOPD from Dabb’iya Phases I/II export system as a result of the high backpressure, currently experienced by the MOL pumps. Major brownfield scopes shall be implemented as part of project as described in the Contract and subsequent TBs and I-OE’s. I-OE’s.

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 4 of 49



Rev.01

Date : 28/10/2015

Due to the requirement for installing permanent water injection pigging facilities, water disposal facilities are required. Eight water disposal wells shall be strategically distributed amongst 8 clusters.

1.2

DABB’I YA

PHASE III CPP FACILITIES

New oil and gas processing trains adjacent to existing CPP facilities •

2 new oil processing trains (Train 3 and Train 4) shall be designed to cater for the additional production from Dabb’iya Fields. Each train is sized to meet 70 MBOPD technical oil production rate. The new trains shall have a slug catcher at each of their inlet. Each train shall adopt the same processing scheme as the existing scheme which includes separation, stabilization and oil export. As means for providing operational flexibility, interconnection between the existing and new CPP manifolds shall be provided. This bidirectional interconnection provides train redundancy.The interconnection shall be sized for the sustainable rate of Derated Phases I/II capacity of 53 MBOPD. An additional interconnection shall be provided at the inlet of the new and existing flow suction tanks and is sized for offloading 10 MBOPD from Phases I/II to Phase III. 2 x 50% compression trains (LP, MP and HP) are provided with two stages of compression each. Dehydration using glycol absorption shall be adopted in Phase III for meeting the gas specification of a maximum water content of 3 lb/MMSCFD (winter condition) and 6 lb/MMSCFD (summer condition). Existing and new HP compressors have a common suction and discharge. Such interconnections enable the efficient utilization of both compressors. Optimizing the use of the new and existing compressors enables the phasing of the installation of the second HP compressor Train 4 which is planned to be installed by year 2025. Export gas compressors (2 x 50%) receive the surplus gas of Dabb’iya Phase I/II and III and applies compression before it is transported to the New Manifold Station and eventually to Hasbhan-05. The Water Injection System involves 4 x 33% variable speed water injection pumps designed for a total technical capacity of 182 MBWPD. 12 Water supply wells shall be drilled, 2 of which shall be spare. A total of 7 water disposal wells shall be drilled. 4 of these water disposal wells shall include three dedicated wells (the fourth well being a spare) for the disposal of water from the WSWs during pump minimum flow or during start-up. The rest of the three water disposal wells include 2 dedicated (the third one being a spare) for the CPP produced water disposal as well as the disposal of water during the initial flushing of the water injection pumps.

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 5 of 49



Rev.01

Date : 28/10/2015

•

Oil and Gas Export Facilities (Pipeline)

Pipelines are routed in both offshore and onshore areas. Offshore pipelines connect Bu Labyad Island and other clusters located on artificial islands with the onshore pipeline sections running on natural islands. Offshore Pipeline routes are in shallow waters dissected by natural or manmade channels. With the exception of Bu Labyad Island, onshore pipelines are routed through large sections of sabkha areas. Pipeline systems involved in Dabb’iya Phase III Development are as described below: •

Field Gathering and Injection Network (Onshore/Offshore) o

•

o

Water Injection System

o

Gas Injection System

Export Lines o

o

o

o

•

Gas Injection System 20’’ Oil Export Pipeline from Dabb’iya CPP to New Manifold Station tie-in to pipeline from Rumaitha to MP-21 12’’ Dabb’iya Gas Export pipeline from Al-Dabb’iya CPP to New Manifold Station. 18’’ Common gas export pipeline from NMS to Hasbhan -5.

Import Lines o

2.

Production gathering pipelines between clusters and CPP, including Oil trunklines (3 new trunklines No.3 & No.4 connecting to CPP Phase III, with trunkline No.5 connecting to Dabb’iya Phases I/II).

Water supply pipelines from ESP wells pumps to CPP shall supply water injection pumps.

PURPOSE OF THIS SPECIFICATION The purpose of baseline thickness survey monitoring (control) and management of internal corrosion / erosion conditions and tendency in an operation phase. Periodical thickness measurement is planned and performed after start-up. In a plant construction phase, thickness measurement locations for piping system and equipment are determined and baseline thickness survey

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 6 of 49



Rev.01

Date : 28/10/2015

(initial thickness measurement) is performed so that corrosion can be monitored and controlled appropriately in an operation phase. This specification is part of the Corrosion Management Manual (as required by SHELL DEP 39.01.10.11 paragraph 2.2.3.3 and SHELL DEP 30.10.02.14) and describes the general requirements for initial and periodical ultrasonic wall thickness measurement for equipment (CPP and Clusters) and process piping (CPP). As described in 30.99.37.1603 Corrosion Monitoring Philosophy: 









At clusters, the major corrosion monitoring methods is on-line monitoring (with corrosion coupon and probes or provision for probes). Each flowline and lines downstream production manifold to pipelines are covered by on-line monitoring; hence periodical UT measurement is not required. Pipelines are covered by in-line inspection (ILI) intelligent pigging (baseline survey). Pig traps shall be monitored according to this specification. At CPP, most of the equipment are made of CRA, with piping in carbon steel. The main monitoring technique is periodical UT measurement with minimal on-line monitoring. Carbon steel equipment and process piping shall be monitored according to this specification. The water supply / disposal / injection systems is covered at key location with on-line monitoring with both corrosion coupon and corrosion probes installed and hence periodical UT measurement is not required.

Baseline survey of pipelines by in-line inspection (intelligent pigging) is outside scope of this specification. For static equipment, the execution of baseline survey shall be carried out by Vendor in its workshop. This specification shall not be however intended and does not have the purpose to define the requirements of quality control of fabrication (dimensional check). Initial or periodical inspection as per fabrication code (ASME) or according to mandatory local laws and regulation are outside scope of this specification: in case of specific mandatory requirements the same must also be complied. This specification also provide as Corrosion Monitoring Plan the recommended inspection frequency for ultrasonic wall thickness measurements which is however a “live information” which need to be periodically updated based on plant actual corrosion rate historical data. DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 7 of 49



Rev.01

Date : 28/10/2015

The full Corrosion Monitoring Manual and Plan therefore consists in the following: Monitoring Type

Applicable items

Reference

Periodical ultrasonic wall thickness measurements

CPP piping

Corrosion loop definitions, selection of lines and equipment and recommended inspection frequency will be covered in dedicated deliverable 30.99.37.1611.

CPP equipment Pig Traps

Additionally, full set of dedicated drawings (static equipment or isometric drawing) will be issued showing selected monitoring location. On-line monitoring sampling

/

CP monitoring

Piping (general)

Recommended inspection frequency is defined in 30.99.37.1603 Corrosion Monitoring Philosophy

Buried items.

Recommended type of inspection and frequency is defined in 30.99.37.1603 Corrosion Monitoring Philosophy

metallic

Storage tanks bottom (underside) Storage tanks / Vessels with internal SACP or ICCP In Line (Intelligent survey)

Inspection Pigging

Visual

Recommended frequency is 02.99.12.1613 Philosophy

inspection defined in Pigging

All items subject to atmospheric corrosion, CUI and items with internal coating.

Recommended type of inspection and frequency is defined in 30.99.37.1603 Corrosion Monitoring Philosophy

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 8 of 49


Pipelines


Rev.01

Date : 28/10/2015

3.

DEFINITIONS AND ABBREVIATIONS ADCO

Abu Dhabi Company for Onshore Petroleum Operations (ADCO) Ltd

AIMS

Asset Integrity Management System (AIMS)

CA

Corrosion Allowance

CC

Corrosion Coupon

CLS

Clusters

COMPANY

Abu Dhabi Company for Onshore Petroleum Operations (ADCO) Ltd.

CONTRACTOR

Tecnimont SpA

CORROSION LOOP

One (1) corrosion loop is a group of equipment and lines subject to same internal corrosion / erosion damage mechanisms and same (or similar) process conditions and chemical compositions.

CRunhinibited

Corrosion rate (applicable only for oil service) as resulting from ECE5 calculation.

CRdesign

Design corrosion rate assumed (for non corrosive service) or for standardized service (i.e. flare) as the ratio between the nominal corrosion allowance and design life (30 years) Theoretical max corrosion rate which represents the worst scenario in case of:

CRworst

absence of corrosion inhibition (CRunhinibited for oil service whenever ECE5 calculation have been carried out) or

-

presence of free water phase on material surface (i.e. for dry gas or traced lines using DeWaard Milliams formula with no correction factors)

-

CRdesign for non corrosive or standardized service

CPP

Central Processing Plant

CRA

Corrosion Resistant Alloy

CS

Carbon Steel

CUI

Corrosion Under Insulation

ER

Electrical Resistance Probe (Corrosion Probe)

LPR

Linear Polarization Resistance (corrosion probe)

MSCCR

Material Selection and Corrosion Control Report

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 9 of 49


-


Rev.01

Date : 28/10/2015

MSD

Material Selection Diagram

NACE

National Association of Corrosion Engineers

NNF

Normally No Flow

P

Personal Protection (insulation code)

PROJECT

EPC for Al Dabb’iya Surface Facilities Phase III

PSV

Pressure Safety Valve

SUSCEPTIBLE AREAS SB PIPING TML

Areas of internal corrosion and / or erosion such as injection points which are expected to have accelerated corrosion and/or erosion. Small bore piping (i.e. nominal size of pipe is less and equal to 1-1/2 inch) Thickness Measurement Locations (UT measurement point location)

UT

Ultrasonic Thickness Measurements

VENDOR / SUPPLIER

Firm awarded with Purchase order by CONTRACTOR to supply equipment and / or material for the project

4.

REFERENCES

4.1

PROJECT SPECIFICATIONS 30.99.37.1603:

Corrosion Monitoring Philosophy

02.99.12.1613:

Pigging Philosophy

30.99.91.1633

Process Design Basis

02.99.91.0610

Technical Scope of Work Material Selection and Corrosion Control Philosophy Material Selection and Corrosion Control Report (Clusters and flowlines) Material Selection and Corrosion Control Report (CPP Only) Material Selection and Corrosion Control Report -Pipeline

30.99.37.1601 30.99.38.1601 02.99.38.2601 30.99.38.1611 30.99.37.1604

Corrosion Monitoring Philosophy

30.99.37.1604

Corrosion Inhibition and Chemical Treatment Philosophy

02.99.12.1613

Pigging Philosophy

30.99.90.1750

Document Numbering Procedure

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 10 of 49



Rev.01

Date : 28/10/2015

Corrosion loop definition and selected line list / Equipment list for baseline Survey (to be issued at later stage)

30.99.37.1611

4.2

4.3

4.4

ADCO SPECIFICATIONS CIMS-CM-1.0:

Corrosion Monitoring

ES 30-99-00-0102:

Corrosion and Materials Selection Philosophy

CIS07 (AIMS)

Performance of Asset Integrity Reviews

CIS08 (AIMS)

Project Documentation Requirements

SHELL DEP DEP 39.01.10.11:

Selection of Materials for Life Cycle Performance

DEP 30.10.02.14:

Carbon Steel Corrosion Engineering Manual for upstream facilities

International Industry Standards API 570 EN 473-2001 ISO 9712-2012 ASME V

5.

Piping Inspection Code. Inspection , Repair, Alteration, and Rerating of In-service Piping System Non-destructive testing - Qualification and certification of NDT personnel - General principles Non-destructive testing - Qualification and certification of NDT personnel BPVC – Non-destructive Examination

WORK STEPS FOR BASELINE THICKNESS SURVEY Detailed procedure is described in paragraph 6 (for piping) and paragraph 7 (for equipment). The standard API 570 Piping Inspection Code Inspection, Repair, Alteration, and Rerating of In-service Piping System provide guidelines in the thickness measurement locations selection. Similar approach is followed inside this specification. The major step of the activity can be summarized as follows: 

First step definition of corrosion loops (systems) according to fluid contained (i.e oil processing, stabilized oil, fuel gas, fire water etc...), expected corrosion degradation mechanism and corrosivity (based on Material Selection and Corrosion Control Report)

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 11 of 49



Rev.01

Date : 28/10/2015





Second step is to select materials having thickness loss as potential degradation mechanisms which can therefore be effectively monitored by periodical point UT measurement (baseline survey). Whereas other degradation mechanisms may occur (e.g. cracking etc..) the pointwise inititial UT measurement will not provide any useful information and therefore is not considered Third step is the finalization of equipment and piping (lines) requiring periodical wall thickness UT measurement

Dedicated deliverable 30.99.37.1611 “Corrosion loop definition and selected line list / equipment list for baseline Survey ” will be issued by Contractor covering the steps above and will consist of the following: 





Definition of corrosion loops, recommended initial inspection frequency and mark-ed up MSDs with corrosion loop list of selected representative lines per each corrosion loop and number of susceptible areas per group of lines (belonging to same corrosion loop) which shall be subjection to periodical wall thickness UT measurement list of selected pressure vessel for baseline survey which shall be subjection to periodical wall thickness UT measurement

As further steps: 





Fouth step: assignment of susceptible areas for corrosion / erosion (worst location) for each applicable corrosion loop. Depending on kind of susceptible area, TMLs are then selected accordingly. Details of criteria / procedure for setting TMLs according to susceptible area (for piping) and for pressure vessels are indicated in paragraph 6 and paragraph 7 respectively. Basically the susceptible areas are distributed and located on equivalent lines belonging to same corrosion loop focusing the attention on main lines with the largest diameters; for pressure vessel TMLs are distributed on representative portions of items Fifth step is the verification of accessibility of selected TMLs for piping systems and update (if necessary) Sixth step is the issue of dedicated documents (isometric drawing or Vendor pressure vessel drawing) with indication of actually selected TML locations.

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 12 of 49



Rev.01

Date : 28/10/2015

6.

BASELINE PROCEDURE FOR PIPING

6.1

SELECTION OF REPRESENTATIVE LINES The general criteria for the selection of the representative line(s) for each corrosion loop are the following: 



Main process piping system having (preferably NPS > 6”; SB are excluded)

largest

pipe diameters

Carbon steel, LTCS, low alloy material steel lines (Stainless steel, High Ni alloy, and non-metal material are not included)



Bare, insulated, steam traced (jacketed section excluded) piping



Worst location(s) for each loop



lines not already covered by on-line monitoring (corrosion coupons, probes)

Piping systems which are integral part of component of rotating or reciprocating mechanical devices such as pumps, compressors, turbines generators, engines etc..(within package battery limit) are excluded from baseline survey.

6.2

SUSCEPTIBLE AREAS OF INTERNAL CORROSION AND/OR EROSION Susceptible areas of internal corrosion and/or erosion such as injection points are expected accelerated corrosion and/or erosion. In general, thickness measurement is conducted focusing on susceptible areas. Therefore, baseline thickness survey shall be conducted at susceptible areas. In general, number of susceptible areas to be inspected is based on corrosivity. More corrosive lines should have more areas to be inspected. Table 1 shows required number of susceptible areas of each representative line(s) to be inspected for each corrosion loop based on risk rank of internal corrosion and/or erosion. Table 1 also shows corrosivity definitions of each risk rank.

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 13 of 49



Rev.01

Date : 28/10/2015

Table 1 - Number of susceptible areas Number of susceptible areas to be inspected**

Corrosivity definition

Extreme (E)

5

CRworst is extremely high: above 1 mm/y.

High (H)

3

CRworst is 1 mm/y or less.

Medium High (MH)

2

CRworst is 0.20 mm/y or less.

Medium (M)

0


Low (L)

0


Negligible (N)

0

Negligible corrosion is expected.

Risk Rank*

*

For special cases concerned, raise Risk Rank in order to select additional areas to be inspected.

**

Number of susceptible areas may be changed depending on accessibility, etc.

Typical susceptible areas of internal corrosion and/or erosion are shown in Table 2. These areas shall be selected for baseline thickness survey preferentially. Table 2 - Typical susceptible areas of i nternal corrosion and erosion Susceptible area

Detailed Location

Injection Point

Injection point

Downstream of Orifice & Venturi

Orifice & Venturi section

Downstream Valves

Reducer & piping

of

Control

Changed section of flow direction

Changed section of flow

Including downstream piping Tee

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 14 of 49


Reducer


Rev.01

Date : 28/10/2015

Susceptible area

Detailed Location

direction

Including downstream piping Elbow

Changed section of flow direction

NNF (Normally No Flow) parts

Including upstream & downstream piping Upstream of PSV, Dead Ends, and NNF lines

Followings are the points to identify susceptible areas. 

Dead legs and lines with intermittent flow



Locations susceptible to velocity erosion



Chemical injection points

In case that for the selected applicable lines there aren’t sufficient location as per Table 2 or in case of not accessibility:

6.3



alternative representative lines are selected (first option)



straight portion of pipe are selected

THICKNESS MONITORING LOCATIONS FOR PIPING SYSTEMS Thickness monitoring locations (TMLs) are locations set on each susceptible area. Lines of 6 inches and above are preferentially selected for setting of TMLs for easier measurement. Number of TMLs for each susceptible area is indicated in Table 3. Table 3

Number of thickness susceptible areas

Susceptible area

Injection Point

4

Downstream of Orifice & Venturi

4

locations

for

Remarks

Applied to corrosive or erosive conditions only.

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 15 of 49


Number of TMLs

monitoring


Rev.01

Date : 28/10/2015

Susceptible area

Number of TMLs

Downstream of Control Valves Changed section flow direction

of

Changed section flow direction

of

Changed section flow direction

of

Remarks

2 1 2 1 2 or 3

Dead leg zone Straight portion of pipe

2 1 or 3 1 or 2 2

TML is not set for SB Piping Top and Bottom position

Followings are also considered for selection of TMLs.

6.4



Locations where fluids of two different operating parameters mix.



Two phase fluid joining manifold/header from different branches.



Accessibility for inspection with minimum or no scaffolding required.

PROCEDURES OF TML SETTING FOR PIPING SYSTEM TMLs are set in accordance with following steps, considering the accessibility and susceptible areas of internal corrosion and/or erosion: Step 1: Identify susceptible areas by using P&ID and piping 3D-model and select areas to be inspected per corrosion loop in accordance with Table 2. Step 2: Confirm the accessibility to susceptible areas selected at Step 1 and set TMLs in accordance with Table 3 and paragraph 6.8. Areas where accessibility is not enough cannot be candidates for TMLs.

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 16 of 49



Rev.01

Date : 28/10/2015

6.5

THICKNESS MEASUREMENT POINTS PER TML (GENERAL RULE) The number of thickness measurement points per TML is shown in Table 4. Table 4

Number of thickness measurement points per TML

Nominal pipe size (inch)

Number of thickness measurement points per TML

Remarks

-

Two (2)

See Note 1.

<6

One (1)

Long radius side only

6 < Size <18

Two (2)

> 20

Three (3)

Reducer

-

Two (2)

Tee

-

Three (3)

Cap

-

One (1)

Componen t

Pipe Elbow & Bend

Note 1: In the case that a pipe is connected to Tee or Elbow, number of thickness measurement points per TML is 1 or 2 depending on the piping layout.

6.6

PREPARATION FOR BASELINE THICKNESS SURVEY TMLs for a piping system are determined per each corrosion loop and drawn in isometric drawings. Description of TMLs is as follows: Area Code – Plant Area Code - CLxxx – P-xxx(X4) - Segment - Sequential number Area Code:

as defined in 30.99.90.1750 Document Numbering Procedure Attachment 2 (e.g. 02)

Plant Area Code:


CLxxx:

Corrosion Loop Number (e.g. CL001)

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 17 of 49



Rev.01

Date : 28/10/2015

P-xxx:

TML location number (e.g. P-001)

X4:

Number of measurement points (e.g. “X4” means 4 measurement points)

Prior to the site survey, recording format of baseline thickness survey indicating the followings is prepared. 









Description of TML (Area Code / Plant Area Code / Corrosion Loop Number/ TML location number/ Sequential Number: Number of measurement number) Additional information (Line Number/ Parts Name/ Orientation) Specification of TMLs (Material/ Nominal Size/ Nominal Thickness/ Schedule/ Corrosion Allowance/ Minimum Allowable Thickness by CODE/ Insulation/ Plug Size/ Required support work (Scaffolding)) Baseline Thickness Survey Result (Readings/ Date/ Inspector) Columns (Reading/ Date/ Inspector) for additional measurements for future inspections

Typical example of recording format f or baseline thickness survey is shown in paragraph 6.9.

6.7

BASELINE THICKNESS SURVEY AT SITE Baseline thickness survey shall be performed by Ultrasonic thickness measurement. Operators of ultrasonic thickness measurement shall be certified as per paragraph 6.7.2.

6.7.1

Thickness Meter In general, thickness measurement shall be performed by ultrasonic thickness meter without removing paint. Therefore, thickness measurement meters which have cancellation function of paint layer shall be applied. Typical examples of applicable thickness meters are as follows: 

KrautKramer DMS 2



JPC Pocket Memo 6400

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 18 of 49



Rev.01

Date : 28/10/2015

6.7.2

Thickness measurement at site Thickness of one (1) inch diameter area shall be measured for each measurement point and minimum thickness reading obtained in the area shall be recorded in a recording format shown in paragraph 6.9. Thickness data is recorded with one decimal digit point in metric unit. All personnel engaged in inspection shall be trained, qualified and certified in conformity to EN 473-2001 or ISO 9712-2012 (or ASNT SNT TC 1A) for the specific NDT. The NDT reports shall be certified and signed by a Level II in conformity to EN 473-2001 or ISO 9712-2012 (or ASNT SNT TC 1A) for the specific NDT. Ultrasonic thickness meter calibration shall be carried out conformity to EN 473-2001 or ISO 9712-2012 (or ASNT SNT TC 1A) for the specific NDT NDT shall be the subject of a written procedure written by the NDT Team and signed by a Level III in conformity to EN 473-2001 or ISO 9712-2012 (or ASNT SNT TC 1A) for the specific NDT.

6.7.3

Marking of TML locations at site In the case of insulated and steam traced piping system, TML locations are not marked on piping components but identified by insulation windows. With regard to the insulation window, three (3) inch or five (5) inch readymade plug, indicated in paragraph 8.1, is applied in general. Removable insulation box is also applicable for multi-point measurement. Recommended size of ready-made inspection plug for piping system is shown in paragraph 8.2. In general, three (3) inch ready-made plug is applied to lines less than 6 inches. Five (5) inch ready-made plug is applied to lines 6 inches and above for easier measurement. In the case of bare piping, TMLs are not marked on piping components but identified by ready-made labels. With regard to the ready-made label, type F ready-made label, indicated in paragraph 8.3, is applied.

6.7.4

Relocation and cancellation of TMLs at site When TML locations and/or measurement points are changed from the original plan at site due to accessibility, etc., all revision shall be indicated on isometric drawings and revised documents shall be submitted.

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 19 of 49



Rev.01

Date : 28/10/2015

6.8

GUIDELINE FOR TML SETTING P1

INJECTION POINTS

TML-4 TML-2 TML-1

TML-3

FLOW

D

D

D

3D

D: NOMINAL PIPE DIAMETER Each TML has 2 measurement points: Top & Bottom or North & South

P2

ORIFICE & VENTURI

TML-2

TML-1

TML-4

TML-3

FLOW

L

D

D

3D

D: NOMINAL PIPE DIAMETER L: DISTANCEW FROM WELDS 25mm FOR BARE PIPING, WITHIN 150mm FOR INSULATED PIPING Each TML has 2 measurement points: Top & Bottom or North & South

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 20 of 49



Rev.01

Date : 28/10/2015

TML-1

TML-2

TML-3

TML-4

FLOW

L

D

D

3D

D: NOMINAL PIPE DIAMETER L: DISTANCEW FROM WELDS 25mm FOR BARE PIPING, WITHIN 150mm FOR INSULATED PIPING Each TML has 2 measurement points: Top & Bottom or North & South

P3

DOWNSTREAM OF CONTROL VALVES

TML-1 L

TML-2

FLOW

TML-2 FLOW

TML-1

TML-2

L TML-1 L: DISTANCEW FROM WELDS 25mm FOR BARE PIPING, WITHIN 150mm FOR INSULATED PIPING Each TML has 2 measurement points: Top & Bottom or North & South

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 21 of 49



Rev.01

Date : 28/10/2015

P4

CHANGED SECTIONS OF FLOW DIRECTION (REDUCERS)

TML-2

TML-1

FLOW

L

FLOW

TML-2

TML-1

L: DISTANCEW FROM WELDS 25mm FOR BARE PIPING, WITHIN 150mm FOR INSULATED PIPING Each TML has 2 measurement points: Top & Bottom or North & South

P5

CHANGED SECTIONS OF FLOW DIRECTION (TEES)

FLOW

TML-1-3 DOWNSTREAM SIDE

TML-2-2 BRANCH OPENING SIDE

L

FLOW

FLOW

TML-2-1 L L TML-1-1

TML-1-2

OPPOSITE SIDE OF BRANCH OPENING



L: DISTANCEW FROM WELDS 25mm FOR BARE PIPING, WITHIN 150mm FOR INSULATED PIPING IN THE CASE THAT A TRUNNION SUPPORT IS INSTALLED, TML-1-1 SHALL BE CANCELLED or MOVED TO THE DOWNSTREAM SIDE.

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 22 of 49



Rev.01

Date : 28/10/2015

TML-3 (1 point)

FLOW

IMPINGEMENT SIDE

TML-1-3 L

IMPINGEMENT SIDE

FLOW

L L TML-1-1 OPPOSITE SIDE OF BRANCH OPENING

TML-2 (1 point)

TML-1-2


TML-2-2

FLOW

TML-2-1

South or Bottom

North or Top

TML-1-3 L

TML-1-2

South or Bottom

L

North or Top

FLOW

FLOW

TML-1-1 OPPOSITE SIDE OF BRANCH OPENING

TML-2-1 & TML-1-2

TML-2-2 & TML-1-3

L: Distance from welds 25mm FOR BARE PIPING, WITHIN 150mm FOR INSULATED PIPING IN THE CASE THAT A TRUNNION SU PPORT IS INSTALLED, TML-1-1 SHALL BE CANCELLED or MOVED TO THE DOWNSTREAM SIDE.

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 23 of 49



Rev.01

Date : 28/10/2015

FLOW

FLOW

FLOW

L L TML-1-2 North or Top

TML-1-3 South or Bottom

TML-2 (1 point) OPPOSITE SIDE OF BRANCH OPENING North or Top side

TML-3 (1 point) OPPOSITE SIDE OF BRANCH OPENING South or Bottom side

TML-1-1 OPPOSITE SIDE OF BRANCH OPENING

L: Distance from welds 25mm FOR BARE PIPING, WITHIN 150mm FOR INSULATED PIPING IN THE CASE THAT A TRUNNION SUPPORT IS INSTALLED, TML-1-1 SHALL BE CANCELLED or MOVED TO THE DOWNSTREAM SIDE.

P6

CHANGED SECTION OF FLOW DIRECTION (ELBOWS)

TML-3 (1 point for long radius side)

45 deg

L

TML-1-1 Top or North

TML-2 (Number of measurement point for TML-2 is shown in next page). FLOW

L L: Distance from welds 25mm FOR BARE PIPING, WITHIN 150mm FOR INSULATED PIPING

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 24 of 49



Rev.01

Date : 28/10/2015

Number of measurement point for elbow PIPE SIZE < 6 inch 1 measurement point per TML

PIPE SIZE > 18 inch 6 inch < PIPE SIZE < 18 inch 2 measurement points per TML 2 measurement points per TML FLOW

FLOW

FLOW

30 deg 30 deg

45 deg

45 deg 75 deg

45 deg

TML-2-1

TML-2-2 TML-2-1

TML-2-3

TML-2 LONG RADIUS SIDE OF ELBOW IN THE CASE THAT A TRUNNION SUPPORT IS INSTALLED, TML-2 SHALL BE MOVED TO THE DOWNSTREAM SIDE.

P7

TML-2-2

IN THE CASE THAT A TRUNNION SUPPORT IS INSTALLED, TML-2-2 SHALL BE MOVED TO THE DOWNSTREAM SIDE.

IN THE CASE THAT A TRUNNION SUPPORT IS INSTALLED, TML-2-2 SHALL BE CANCELLED.

DEAD ZONE (Cap)

TML-2-1 Top

TML-1 (1 point)

TML-2-1 Bottom L: Distance from welds 25mm FOR BARE PIPING, WITHIN 150mm FOR INSULATED PIPING

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 25 of 49



Rev.01

Date : 28/10/2015

6.9

RECORDING FORMAT FOR BASELINE THICKNESS THICKNESS SURVEY

Description of TML

No,

Area

Plant Area

Code

Code

Additional information TML

CL No.

Location number

Seq. No.

Line Number

Parts Name

Specification of TML

Orientation Material

Size (inch)

Sch

Thick.

CA

MAT

(mm)

(mm)

(mm)

Baseline survey result

Insu.

Plug

Support work

(inch) Scaffold

Readings

Date

Inspector

(mm)

02

01

CL001

P-001

1

XXXXXXXX

Pipe

N

XXXXXXXX

Pipe

S

3.0

-

5

Yes

10.1 10.1

***

2

7.3 7.3

DD/MM/YY

P-001

10.3 10.3

Yes

CL001

40 40

5

01

12 12

-

02

A 53 A 53

3.0

2

DD/MM/YY

***

3

02

01

CL001

P-002

1

XXXXXXXX

Pipe

TOP

A 53

12

40

10.3

3.0

7.3

H

Yes

10.1

DD/MM/YY

***

4

02

39

CL001

P-002

2

XXXXXXXX

Pipe

BOTTOM

A 53

12

40

10.3

7.3

***

39

CL001

P-003

1

XXXXXXXX

Elbow

-

-

12

40

10.3

7.3

5

Yes Yes

DD/MM/YY

02

H H

10.1

5

3.0 3.0

5 5

10.1

-

-

12

40

10.3

3.0

7.3

H

5

Yes

10.1

-

7.3

-

-

-

-

-

3.0

-

No

***

3.0

-

No

10.0 10.0

DD/MM/YY

7.3

DD/MM/YY

***

3.0

7.3

No

10.0

DD/MM/YY

***

3.0

7.3

No

10.0

DD/MM/YY

***

02

39

CL001

P-003

2

XXXXXXXX

-

-

-

-

-

-

99

***

P-001

1

XXXXXXXX

***

CL020 CL020

***

CL020

***

CL020

100 101 102 Legend: CL No.: Seq. No.: Sch: CA: Insu.: N: S:

P-001 P-002 P-002

Corrosion Loop Number Sequential Number Schedule Corrosion Allowance Insulation code North (Construction North) South

2 1 2

Elbow -

XXXXXXXX XXXXXXXX XXXXXXXX

Pipe Pipe Pipe Pipe

N

A 53

12

40

10.3

S

A 53

12

40

10.3

N

A 53

12

40

10.3

S

A 53

12

40

10.3

Equip. No.: Size: Thick: MAT:

Equipment Number Nominal size Nominal thickness Minimum Allowable Thickness by CODE

E:

East

-

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610

SPECIFICATION FOR BASELINE SURVEY FOR EQUIPMENT AND PIPING ORIGINATOR No. 3844-VZ-SG-GA000033 Directory Path


PAGE : 26 of 49

Rev.01

ings (mm)

1

6

Periodical Inspection Read-

Date : 28/10/2015

Periodical Inspection Read-

Date

Inspector

ings (mm)

Date

Inspector

7.

BASELINE PROCEDURE FOR EQUIPMENT As described in paragraph 2 of this specification, baseline thickness survey is conducted for corrosion monitoring and corrosion control purpose after start-up and shall not be intended as replacement of quality control of static equipment during fabrication (dimensional check).

7.1

SELECTION OF STATIC EQUIPMENT FOR BASELINE THICKNESS SURVEY Baseline thickness survey shall be planned for static equipment that satisfies all the following conditions simultaneously: 





Tagged static equipment Note 1) Pressure static equipment or above ground storage tank (rotating equipment excluded) Material of construction: carbon and low alloy steel (Stainless steel, High Ni alloy, and Non-metal material are excluded from baseline thickness survey) Note 2)

Notes: 1) Static equipment of utility systems, except for steam boiler, is not included in the baseline thickness survey. For example, the baseline thickness survey for the following static equipment is not performed: a. Air tanks of instrument air system b. Static equipment of packaged equipment / machinery (such as compressors / generators) of utility systems The baseline thickness survey shall be carried for static equipment of packaged equipment / machinery of process systems such as GDU / GRU and VRC (only for items made of carbon and low alloy steel). 2) In the case that a component (i.e. shell, head, nozzle, etc) of static equipment is fabricated by solid, cladding, or weld-overlay of stainless steel or high Ni alloy, setting of TMLs and initial thickness survey are not performed. In case of partial clad / weld overlay, setting of TMLs and initial survey are required only on the section without clad / weld overlay

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 27 of 49



Rev.01

Date : 28/10/2015

7.2

SETTING OF TMLS FOR STATIC EQUIPMENT When setting TMLs, the process and design data of the static equipment, that requires baseline thickness survey, shall be referred to confirm the followings: 



Type and function of static equipment Constructed material and corrosion allowance, including internal coating, lining, and cladding



Operating conditions and probable damage mode



Type and thickness of thermal insulation

Setting of TMLs for static equipment shall be performed in accordance with the guideline, shown in Table 1, Table 2, paragraphs 7.6, 7.7 and paragraph 8 considering the accessibility and susceptible location of internal corrosion and internal erosion. In the case of static equipment shell and head, the number of measurement point per TML shall be one (1).

Table 1 Guideline of TML setting for static equipment No.

1

2

3

4

Type of static equipment

Column

Reactor & Vertical drum

Horizontal drum

Shell & tube type heat exchanger

Point *

Remarks

Bottom & top head

①⑤

**

Shell

②③④

Nozzles

-

Every manhole elevation Detail is indicated in Table 3.

Bottom & top head

①③

**

Shell

②

Nozzles

-

Head

①⑤

Shell

②③

Boot head

④

Nozzles

-

Shell cover Shell Channel

① ②③ ④

Nozzles

-

Every platform elevation Detail is indicated in Table 3. Liquid and gas phase Water phase Detail is indicated in Table 3.

Detail is indicated in Table 3.

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 28 of 49


TMLs


Rev.01

Date : 28/10/2015

No.

5

6

7

Type of static equipment Kettle type heat exchanger

Air cooled heat exchanger

Boiler

TMLs

Point *

Shell head Shell & cone Channel

① ②③ ④

Nozzles

-

Header box of both side

①②

Nozzles

-

Steam drum Water drum

①② ③④

Remarks

Detail is indicated in Table 3. Bottom side or top side on the basis of process fluid Detail is indicated in Table 3.

TML is not determined Circumferentially 4 locations *** Bottom plate ①②③④⑤ Center of bottom plate Above shell bottom plate, TML is Shell Mid. determined every ⑥⑦⑧ section layer of shell, along with stairway. 8 Tank TML shall be determined circumferentially 4 ⑩⑪⑫⑬ Roof locations, in the case that tank is cone roof type and permanent platform exists. Detail is indicated in Nozzles Table 3. Inlet & outlet section Radiant tube of each coil ①② Fired heater (Flame side) 9 Tube TML is not Nozzles determined. * Point number (sequential number) in the column shall be referred in conjunction with the location number, shown in paragraph 7.6. ** If accessible by using permanent platform or permanent access route, TMLs setting and initial thickness survey are performed. In the case of fire proofed section, TML shall be cancelled. *** If man-entry is not practical during construction stage, only TMLs setting shall be performed. Nozzles

-

・

・

For jacketed equipment (this is applicable only for jacket containing process fluids, not for insulation jacketing) TMLs on item shell / heads etc are set only on non jacketed section. Whereas jacket contains corrosive DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 29 of 49



Rev.01

Date : 28/10/2015

service fluid (as per par. 5.2) TMLs are also set on the jacket itself at convenient locations. Table 3 Guideline of TML setting for static equipment nozzles (when applicable) TML setting nozzles Nozzles of Column, drum, reactor, heat exchanger, and tank

Specification of TML setting

Remarks

Inlet and outlet nozzles: In the case that nozzles of static equipment have permanent stage or permanent platform for access, TML shall be determined for corrosion monitoring. - Two (2) measurement points per one (1) TML shall be determined (i.e. top and bottom, or north and south) for nozzles. However, TML setting of the following nozzles is not performed: - Small bore nozzles Nozzle size is up to 1.5” diameter - Accessory nozzles for instrumentation (i.e. level gauge nozzles, relief valve nozzles, pressure gauge nozzles, etc.)

7.3

BASELINE SURVEY EXECUTION LOCATION (VENDOR VS SITE) For shop fabricated items, the execution of baseline survey shall be fully executed by Vendor in its workshop. The activities include: 





engineering activities (i.e. selection of TMLs location as per this specification and issue of dedicated drawings showing finalized locations, preparation of database of recording measurements) procurement of materials (i.e. labels etc.) execution of UT measurements by qualified personnel and fill of dedicated database

The following are special cases: 

For insulated items baseline survey shall be also executed by Vendor in shop and labels installed. Whenever at site the insulation plugs are installed by site contractor (all insulation code except personal protection since realized with metallic wire) they shall exactly match with the inspection label installed beneath the insulation otherwise TML shall be re-located at site and new measurement made (by site contractor). In this latter case, Vendor

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 30 of 49



Rev.01

Date : 28/10/2015

is required to re-vise the dedicated drawing and update the database 

For process packages (i.e. GRU, VCR) which will be delivered to site skid assembled, Vendor activities includes also setting of TMLs for piping as per paragraph 6 of this specification. In addition to above the activity includes: issue of dedicated isometric drawings showing location, and supply and installation of inspection plugs (as per paragraph 8 of this specification) for insulated items

In all above cases, final setting of TMLs location shall be confirmed based on accessibility of locations with minimum scaffolding requirement. All formats (drawings, template for database etc.) shall be agreed with CONTRACTOR / ADCO. All engineering activities are subject to review by CONTRACTOR / ADCO. Only for special cases and / or specific circumstances, the CONTRACTOR may decide to carry out the baseline survey at site instead of at Vendor shop. For site fabricated items, the baseline survey shall be carried out at site and all the related engineering the activity will be carried out by directly CONTRACTOR.

7.4

PREPARATION FOR BASELINE THICKNESS SURVEY The setting of TMLs for static equipment is performed on skeleton drawing. Setting result of TMLs is indicated on skeleton drawing. The description of TML on skeleton drawing is as follows: Area Code – Plant Area Code - Equipment number - Segment - Sequential number Area Code:


Plant Area Code:


Equipment number:

Tag number (i.e. C-1431)

Segment:

Part name. Examples: N1 (nozzle number) TH (Top head)

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 31 of 49



Rev.01

Date : 28/10/2015

BH (Bottom head) SH (Shell) CH (Channel) SC (Shell cover) BT (Boot head) Sequential number:

Sequential number of TML for equipment. Example: 1-1, 1-2, 2,3,4,5

Prior to the survey, recording format of baseline thickness survey, indicating the followings, is prepared by Microsoft Excel file. 









7.5

Description of TML (Area Code/ Plant Area Code / Equipment number/ Sequential Number) Additional information (Parts Name/ Orientation) Specification of TMLs (Material/ Nominal Thickness/ Corrosion Allowance/ Minimum Allowable Thickness by CODE/ Insulation/ Plug Size/ Required support work (Scaffolding)) Baseline thickness survey Result (Reading/ Date/ Inspector) Columns (Reading/ Date/ Inspector) for additional measurements for future inspections

BASELINE THICKNESS SURVEY Baseline thickness survey for every TMLs shall be performed by Ultrasonic thickness measurement. The personnel responsible to taking measurements shall be certified as per paragraph 7.5.2.

7.5.1

Thickness Meter In general, thickness measurement shall be performed by ultrasonic thickness meter without removing paint. To measure the thickness without removal of paint, the thickness measurement meter, that has the cancellation function of paint layer, shall be applied. Typical examples of applicable thickness meter are as follows: 

KrautKramer DMS 2

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 32 of 49



Rev.01

Date : 28/10/2015



7.5.2

JPC Pocket Memo 6400

Thickness measurement Thickness of one (1) inch diameter area shall be measured for one (1) measurement point (one TML) and minimum thickness reading obtained in the area shall be recorded in a recording format shown in paragraph 6.9. Thickness measurement reading is recorded to one decimal digit point in metric unit. All personnel engaged in inspection shall be trained, qualified and certified in conformity to EN 473-2001 or ISO 9712-2012 (or ASNT SNT TC 1A) for the specific NDT. The NDT reports shall be certified and signed by a Level II in conformity to EN 473-2001 or ISO 9712-2012 (or ASNT SNT TC 1A) for the specific NDT. Ultrasonic thickness meter calibration shall be carried out conformity to EN 473-2001 or ISO 9712-2012 (or ASNT SNT TC 1A) for the specific NDT NDT shall be the subject of a written procedure written by the NDT Team and signed by a Level III in conformity to EN 473-2001 or ISO 9712-2012 (or ASNT SNT TC 1A) for the specific NDT.

7.5.3

Marking of TML location In the case of insulated (all insulation code excluding personal protection) static equipment, TML location is identified (at site) by insulation plug. Description of TML is not marked on static equipment. With regard to the insulation window, five (5) inch or three (3) inch readymade plug, indicated in paragraph 8.1, is applied in general. In the case of static equipment except for nozzles, five (5) inch ready-made plug is applied. In the case of static equipment nozzles, three (3) inch or five (5) inch ready-made plug is applied. Recommended size of ready-made inspection plug for static equipment nozzles is shown in paragraph 8.2. In general, three (3) inch ready-made plug is applied to nozzles less than 6 inches. Five (5) inch ready-made plug is applied to nozzles 6 inches and above for easier measurement. In the case of bare (or insulated for personal protection) static equipment, TML is identified (by Vendor at shop for shop fabricated items) by readymade labels. Description of TML is not marked on static equipment. With DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 33 of 49



Rev.01

Date : 28/10/2015

regard to the ready-made labels, type F ready-made label, indicated in paragraph 8.3, is applied.

7.5.4

Relocation and cancellation of TML at site When TML locations are changed and/or measurement points are changed from the original plan at site due to the accessibility, all revision shall be indicated on skeleton drawing. And revised document including Microsoft Excel file shall be submitted. In the case that fire proof is installed at the TML location, TML of fire proof section is cancelled at site. All cancellation of TML shall be indicated on skeleton drawing, and revised document including Microsoft Excel file shall be submitted.

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 34 of 49



Rev.01

Date : 28/10/2015

7.6

GUIDELINE FOR TML SETTING FOR PRESSURE VESSEL V1 - Column

5 4

3

2 1

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 35 of 49



Rev.01

Date : 28/10/2015

V2 - Reactor & Vertical Drum

3

2

1 V3 - Horizontal Drum

5

2

1 3 4

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 36 of 49



Rev.01

Date : 28/10/2015

V4 - Shell & Tube Type Heat Exchanger

2

1

4 3

2

1

3 4

2

1

4

3

2

1 3

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 37 of 49


4


Rev.01

Date : 28/10/2015

V5 – Kettle Type Heat Exchanger

5

2

1 4 3

5

2

1 3

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 38 of 49


4


Rev.01

Date : 28/10/2015

V6 - Air Fin Cooler (Bottom side or top side is selected based on process fluid)

1

2

100mm

100mm

V7 - Boiler

1 2

3 4 DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 39 of 49



Rev.01

Date : 28/10/2015

V8 - Tank 13

12

11

10

100mm from welds

9 8 Tank bottom plate Circumferentially:

1

2

3

4

7

6

Tank bottom plate Center:

5

V9 - Furnace

1

2

1500mm

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 40 of 49



Rev.01

Date : 28/10/2015

7.7

GUIDELINE FOR TML SETTING FOR STATIC EQUIPMENT NOZZLES (WHEN APPLICABLE) N1 Bare nozzles

N2 Insulated nozzles

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 41 of 49



Rev.01

Date : 28/10/2015

N3 Nozzle with O-let or nozzle with doubling

N4 Insulated nozzle with O-let or insulated nozzle with doubling

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 42 of 49



Rev.01

Date : 28/10/2015

N5 Self-reinforced nozzle

N6 Insulated self-reinforced nozzle

N7 Bottom outlet nozzle with elbow

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 43 of 49



Rev.01

Date : 28/10/2015

7.8

RECORDING FORMAT FOR BASELINE THICKNESS SURVEY

Description of TML

No,

Area Code

Additional information

Plant Area SegEquip. No. Code ment

Seq. No.

Parts Name

Orientation

Specification of TML

Material

CA

MAT

Nominal thickness (mm)

(mm)

(mm)

Baseline survey result

Insu.

Plug (inch)

Support work

Readings

Scaffold

(mm)

Date

Periodical Inspection

Inspector

(mm)

1

02

01

C-XXXX

BH

1

Bottom head

SA 516 Gr.65

9.0

3.0

6.0

-

5

No

9.1

DD/MM/YY

***

2

02

01

C-XXXX

SH

2

Shell

SA 516 Gr.65

9.0

3.0

6.0

-

5

No

9.1

DD/MM/YY

***

3

02

01

C-XXXX

SH

3

Shell

SA 516 Gr.65

9.0

3.0

6.0

H

5

No

9.1

DD/MM/YY

***

4

02

01

C-XXXX

N2

4-1

Nozzle

Top

SA 106 Gr.B

6.2

3.0

3.2

H

5

Yes

6.3

DD/MM/YY

***

5

02

01

C-XXXX

N2

4-2

Nozzle

Bottom

SA 106 Gr.B

6.2

3.0

3.2

H

5

Yes

6.3

DD/MM/YY

-

99

***

1

SA***

9.0

3.0

6.0

-

No

9.1

DD/MM/YY

***

100

***

2

SA***

9.0

3.0

6.0

-

No

9.2

DD/MM/YY

***

101

***

1

N

SA***

9.0

3.0

6.0

-

No

6.3

DD/MM/YY

***

102

***

2

S

SA***

9.0

3.0

6.0

-

No

6.3

DD/MM/YY

***

Legend: Equip. No.: CA: Insu.: S:

Equipment Number Corrosion Allowance Insulation South

Seq. No.: MAT: N:

Sequential Number Minimum Allowable Thickness by CODE North (Construction North)

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610

SPECIFICATION FOR BASELINE SURVEY FOR EQUIPMENT AND PIPING ORIGINATOR No. 3844-VZ-SG-GA000033 Directory Path


PAGE : 44 of 49

Rev.01

Readings

Date : 28/10/2015

Date

Periodical Inspection

Inspector

Readings (mm)

Date

Inspector

8.

DETAILS OF INSPECTION PLUGS AND MARKING LABELS FOR TMLS

8.1

APPLIED READY-MADE INSULATION PLUG OF TMLS

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 45 of 49



Rev.01

Date : 28/10/2015

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 46 of 49



Rev.01

Date : 28/10/2015

8.2

RECOMMENDED SIZE OF READY-MADE INSPECTION PLUG FOR PIPING AND PRESSURE VESSEL NOZZLES

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 47 of 49



Rev.01

Date : 28/10/2015

8.3

APPLIED MARKING LABEL OF TMLS FOR BARE PIPING AND PRESSURE VESSEL

DOCUMENT TITLE:

ADCO DOC. NO. 30.99.37.1610


PAGE : 48 of 49



Rev.01

Date : 28/10/2015

Base Line Specification for Vessels & Piping

Recommend Documents