Document No.
GIS 34-302
Applicability
Group
Date
REVISION FOR REVIEW 11 January 2010
GIS 34-302
Special Purpose Steam Turbines (ISO 10437 or API 612)
Group Instruction for Supply
BP GROUP ENGINEERING TECHNICAL PRACTICES
REVISION FOR REVIEW 11 January 2010
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
Foreword This is the third issue of Engineering Technical Practice (ETP) Group Instruction for Supply (GIS) GIS 34-302.
Copyright © 2010 BP International Ltd. All rights reserved. This document and any data or information generated from its use are classified, as a minimum, BP Internal. Distribution is intended for BP authorized recipients only. The information contained in this document is subject to the terms and conditions of the agreement or contract under which this document was supplied to the recipient's organization. None of the information contained in this document shall be disclosed outside the recipient's own organization, unless the terms of such agreement or contract expressly allow, or unless disclosure is required by law. In the event of a conflict between this document and a relevant law or regulation, the relevant law or regulation shall be followed. If the document creates a higher obligation, it shall be followed as long as this also achieves full compliance with the law or regulation.
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REVISION FOR REVIEW 11 January 2010
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
Table of Contents Page Foreword ........................................................................................................................................ 2 Introduction ..................................................................................................................................... 5 1
Scope .................................................................................................................................... 6
2
Normative references............................................................................................................. 6
5
Statutory requirements........................................................................................................... 6
6
Basic design .......................................................................................................................... 7 6.1 General ....................................................................................................................... 7 6.2 Nameplate and rotation arrows ................................................................................... 7
7
Casings.................................................................................................................................. 7 7.1 Pressure casings ........................................................................................................ 7 7.3 Internal stationary components ................................................................................... 8 7.4 External forces and moments...................................................................................... 8
8
Rotating elements .................................................................................................................. 8 8.1 General ....................................................................................................................... 8 8.2 Shafts ......................................................................................................................... 8 8.3 Blading........................................................................................................................ 9
9
Rotor dynamics ...................................................................................................................... 9 9.1 General ....................................................................................................................... 9 9.2 Lateral analysis ........................................................................................................... 9 9.5 Torsional analysis ..................................................................................................... 10 9.6 Vibration and balancing............................................................................................. 10
10
Bearings, bearing housings, and seals................................................................................. 10 10.1 Radial bearings ......................................................................................................... 10 10.2 Thrust bearings and collars ....................................................................................... 11 10.3 Bearing housing ........................................................................................................ 11 10.4 Grounding ................................................................................................................. 11 10.5 Shaft seals ................................................................................................................ 11
11
Materials .............................................................................................................................. 12 11.1 General ..................................................................................................................... 12 11.3 Welding ..................................................................................................................... 12
12
Controls and instrumentation ............................................................................................... 12 12.1 General ..................................................................................................................... 12 12.3 Overspeed shutdown system .................................................................................... 12 12.5 Instrument and control panels ................................................................................... 13 12.6 Indicating instrumentation ......................................................................................... 13
14
Piping and appurtenances ................................................................................................... 13 14.1 General ..................................................................................................................... 13
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REVISION FOR REVIEW 11 January 2010
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
15
Accessories ......................................................................................................................... 14 15.1 Couplings and guards ............................................................................................... 14 15.2 Gear units ................................................................................................................. 14 15.3 Mounting plates ........................................................................................................ 14 15.5 Lubrication and control-oil system ............................................................................. 15 15.7 Insulation and jacketing............................................................................................. 15 15.8 Turning gear ............................................................................................................. 15
16
Inspection, testing and preparation for shipment .................................................................. 16 16.1 General ..................................................................................................................... 16 16.2 Inspection ................................................................................................................. 16 16.3 Testing ...................................................................................................................... 16 16.4 Preparation for shipment ........................................................................................... 17
17
Vendor's information ............................................................................................................ 18 17.2 Proposals .................................................................................................................. 18 17.3 Contract data ............................................................................................................ 19
Bibliography .................................................................................................................................. 21
Page 4 of 21
REVISION FOR REVIEW 11 January 2010
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
Introduction a.
Requirements for special purpose applications of steam turbines in the petroleum, petrochemical, and natural gas industries are based on ISO 10437 (2003). ISO 10437 is equivalent to API Std 612, sixth edition, November 2005.
b.
Requirements of this GIS are modifications to ISO 10437.
c.
Modifications to ISO 10437 are defined as Add, Delete, or Modify to Read.
d.
Paragraph numbers in this GIS correspond to ISO 10437.
e.
Paragraphs of ISO 10437 that are not revised remain applicable.
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REVISION FOR REVIEW 11 January 2010
1
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
Scope Add This GIS, together with the documents referenced herein, constitutes minimum technical requirements for this equipment.
2
Normative references
Add BP GP 12-45 BP GIS 15-011 BP GP 30-65 BP GP 30-70 BP GP 32-10 BP GP 32-11 BP GP 32-12 BP GIS 34-501 BP GIS 34-503 BP GIS 34-701 BP GIS 34-705 BP GIS 36-103 BP GP 42-10 API Publ 684
5
Electrical for Packaged Equipment. Noise Control. Control Panels. Control and Instrumentation in Vendor Packaged Equipment. Quality Management for Manufacturing - Overall Strategy. Quality Management for Manufacturing - Implementation of QA/QC Requirements into the PSCM Process. Quality Management for Manufacturing - Rotating Equipment. Special Purpose Gear Units (API 613). Special Purpose Couplings (API 671). Lubrication, Shaft Sealing, and Control Oil Systems and Auxiliaries (ISO 10438). Machinery Protection Systems (API 670). Positive Materials Identification (PMI) for Pressure Vessels, Piping, and Other Components. Piping Systems (ASME B31.3). Tutorial on the API Standard Paragraphs Covering Rotor Dynamics and Balance (An Introduction to Lateral Critical and Train Torsional Analysis and Rotor Balancing).
Statutory requirements Add a.
In case of conflict, order of precedence shall be: 1.
Local codes and standards.
2.
Purchase order/requisition/contract.
3.
Project data sheet and drawings.
4.
This GIS.
5.
Referenced BP documents, codes, and industry standards.
b.
In the event of a conflict, manufacturer shall immediately notify BP for written resolution.
c.
Deviation from the requirements specified shall not be assumed to be acceptable by pump manufacturer.
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REVISION FOR REVIEW 11 January 2010
6
Basic design
6.1
General
6.1.1
Add
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
Turbines shall be sufficiently robust to withstand, without damage, results of occasional abnormal conditions of limited duration, such as surging of compressors or electrical faults on generators. 6.1.2
Modify to Read a.
b.
Turbine vendor 1.
For electric power generation applications, turbine vendor shall be responsible for coordination of design and for satisfactory functioning of complete unit (i.e., turbine, generator, transmission, and ancillaries).
2.
Turbine vendor that supplies equipment which it has not manufactured shall, in all respects, be responsible for ensuring that designs of such items are compatible with each other and with turbine vendor equipment.
3.
Satisfactory functioning of complete unit shall form part of turbine vendor contractual guarantee.
For other applications, driven equipment vendor should normally be responsible for overall coordination. Turbine vendor shall cooperate with driven equipment vendor to facilitate development of complete unit.
Add to h)
6.1.15
1.
Uncoupled or unloaded operation shall undergo a safety review of the operating procedure (especially of overspeed protection).
2.
The safety review shall be completed before the operating procedure is performed. This applies to factory testing and site installations.
Modify to Read Sound and noise shall comply with GIS 15-011.
6.2
Nameplate and rotation arrows
6.2.5
Add a.
All rotor responses, regardless of amplification factor (AF), shall also be stamped on the nameplate. If necessary, a separate critical speed nameplate shall be furnished.
b.
Equipment weights shall be stamped on equipment tag. This weight shall include turbine, complete with cover, rotor, and diaphragms.
7
Casings
7.1
Pressure casings
7.1.1
Add a.
Casing shall be suitable for pressures and temperatures encountered if running uncoupled with design inlet steam conditions.
b.
Actual maximum allowable pressure and temperature for mechanical strength purposes shall be stated on the data sheet.
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REVISION FOR REVIEW 11 January 2010
7.1.3
Add
7.1.6
Add
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
Proposals shall include details of case bolting arrangement showing the method of assembly and disassembly. 7.1.12
7.1.18
Add a.
Casing drains shall be individually valved and piped to edge of turbine base.
b.
Valves shall be accessible from operating floor.
Add Horizontal jacking screws shall be required.
Add 7.1.19
Wobble plate type supports
a.
Wobble plate type supports for heat expansion in the lateral direction at the turbine inlet or exhaust end shall be acceptable only with written BP approval.
b.
Calculated expansions expected in the lateral and/or axial direction shall be provided by Vendor with the quotation.
c.
Vendor shall explain how the design prevents torsional roll, off centreline growth, etc.
7.3
Internal stationary components
7.3.2
Add Diaphragms for multistage steam turbines shall be individually secured to prevent axial movement.
Add 7.3.5
Latter stages of condensing turbines shall have drip rims to protect the casing from erosion.
7.4
External forces and moments Add a.
Allowable forces and moments for each casing connection shall be tabulated by turbine vendor.
b.
Vendor shall demonstrate that tabulated forces and moments comply with equations for the resultant and combined resultant forces and moments described in NEMA SM23.
8
Rotating elements
8.2
Shafts
8.2.2
Modify Last Sentence to Read These areas shall be demagnetised or otherwise treated such that combined total electrical and mechanical runout does not exceed the following:
8.2.4
a.
6 μm (0,25 mil) for areas observed by radial vibration probes.
b.
13 μm (0,5 mil) for areas observed by axial position probes.
Modify Second Sentence to Read Shaft ends for couplings shall comply with GIS 34-503.
Page 8 of 21
REVISION FOR REVIEW 11 January 2010
Add 8.2.6
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
a.
Turbine vendor shall, together with driven equipment vendor, establish maximum transient torques that will occur in shafting system during startup, running, and fault conditions.
b.
All components, including coupling and fit of coupling hub on shaft, shall be suitable for at least 115% of the maximum transient torques in a.
8.3
Blading
8.3.1
Modify First Sentence to Read Each blade row shall be verified by Vendor using Campbell diagrams or their equivalent (corrected to actual operating temperatures and speeds), for both nozzle passing frequency and by twice nozzle passing frequency, that excitation does not occur within the range of 90% minimum speed to 110% maximum continuous speed for all multiples of up to 15 times running speed.
Add 8.3.3
8.3.4
a.
Blading that could be in a transition zone between dry and wet regions, under any operating conditions, shall be conservatively designed with low working stresses.
b.
It shall be assumed that chlorides could be present, and fatigue strength of blading materials shall be selected accordingly (see 11.1.6).
a.
Blading shall have been proven in service.
b.
Satisfactory operating experience with each blade profile and height shall be demonstrated.
c.
Vendor shall state whether response frequencies have been substantiated by static or rotating tests.
8.3.5
Vendor shall advise on operating constraints imposed by blading (e.g., limits on extraction, induction and exhaust pressures, temperatures, and flow rates).
9
Rotor dynamics
9.1
General
9.1.2
Modify to Read Resonance conditions shall be reported to BP, regardless of the amplification factor.
9.2
Lateral analysis
9.2.5
Add
Add 9.2.12
a.
A level 1 stability analysis shall be performed by the Vendor in accordance with API Publ 684 to demonstrate that self excited vibration will not occur under any loading condition.
b.
Assumptions regarding magnitude of excitations from oil film, aerodynamic, and other sources shall be stated.
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REVISION FOR REVIEW 11 January 2010
9.5
Torsional analysis
9.5.1
Add
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
Turbine vendors that are responsible for overall coordination shall perform a torsional vibration analysis of the complete coupled train (see 6.1.2). 9.5.2
Add i)
9.5.3
surge of compressors.
Add For generator drive applications, lowest torsional resonance of complete train shall be at least 30% below frequency of electrical system.
9.6
Vibration and balancing
9.6.3
Add Balancing procedures shall be such that rotor and coupling interchangeability can be achieved without need for rebalancing. This requires rotors to be first balanced without couplings and subsequently check balanced with coupling hubs mounted.
9.6.4
9.6.6
Add a.
If high speed balancing is specified, the rotor shall be run to 127% of rated operating speed to demonstrate its integrity in accordance with 12.3.1.1.
b.
If low speed balancing is specified, Vendor shall provide assurance that rotor integrity will not be compromised at 127% rated operating speed.
Modify to Read A rotor that will be high speed balanced shall first receive a sequential, low speed balance as specified in 9.6.2.
9.6.7
Delete Delete “if specified”. Add High speed balanced rotors shall also receive a residual balance check.
10
Bearings, bearing housings, and seals
10.1
Radial bearings
10.1.1
Add a.
Bearing design shall be such that bearings can only be installed correctly. Bearing shall be marked as to its location.
b.
For mechanical drive applications, radial bearings shall be capable of withstanding reverse rotation for short periods of time without damage.
Add 10.1.3
Bearing metal temperatures shall not exceed 90°C (194°F).
Page 10 of 21
REVISION FOR REVIEW 11 January 2010
10.2
Thrust bearings and collars
10.2.1
Add
10.2.2
10.2.5
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
a.
Thrust bearings shall be designed such that they can only be installed correctly.
b.
For mechanical drive applications, thrust bearings shall be capable of withstanding reverse rotation for short periods of time without damage.
Add a.
Bearing metal temperatures shall not exceed 90°C (194°F).
b.
The limit in a. shall apply for maximum thrust conditions and maximum continuous speed, with design clearances.
Add a.
Maximum face unit loading shall be 1 400 kPa (200 psi), including coupling thrust, based on clean blading at all points in operating range.
b.
Graphic display of speed against maximum load capacity that shows boundaries defined by the following criteria shall be submitted:
c.
1.
Minimum oil thickness for continuous operation.
2.
Maximum bearing lining temperature for continuous operation.
3.
Fatigue or mechanical limit for bearing or its lining material.
This graph shall also indicate maximum continuous and transient loads applied to bearings.
10.3
Bearing housing
10.3.1
Add Bearing housings shall have connections for breathers or vents.
10.3.2
10.3.5
Add a.
Provisions for air or nitrogen buffering shall be made.
b.
Buffering shall be designed to purge oil labyrinths with axial velocity of 4,5 m/s to 6,0 m/s (15 ft/s to 20 ft/s). Allowance should be made for wear to two times design clearance.
Modify to Read a.
Provision shall be made for mounting two noncontacting radial vibration probes in each bearing housing, three axial position probes at the thrust end of each machine, and a one event per revolution probe in each machine.
b.
Probe installation shall comply with GIS 34-705.
10.3.6
Add
10.4
Grounding Add a.
A monitoring circuit shall be provided to alarm on brush failure.
b.
Brush shall be suitable for reverse rotation.
10.5
Shaft seals
10.5.1
Add a.
Outer gland packing shall be replaceable without disturbing top half of turbine casing.
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REVISION FOR REVIEW 11 January 2010
b.
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
Labyrinth packing “teeth” shall be on replaceable packing elements. Shaft sleeves with integral teeth shall not be supplied.
Add 10.5.6
On gas seal installations, steam seal drive collar locking attachment to shaft shall be subject to BP approval.
11
Materials
11.1
General
11.1.1
Add a.
Bearing housings adjacent to couplings and using semicircular mounting flange shall be steel or steel alloy.
b.
Bearing housing brackets shall be steel or steel alloy if attached to a steel turbine case.
11.1.6
Add
11.1.10
Add Unless approved otherwise by BP, steam path components, excluding valve seats, valve plugs, bushings, and stems, shall be 22 HRC, maximum.
11.3
Welding
11.3.1
Add If evidence of BP approved welding procedures cannot be provided, welding procedures shall be subject to BP approval prior to fabrication.
12
Controls and instrumentation
12.1
General Add a.
Instrumentation and control equipment required to monitor and sequence turbine through startup, operation, and shutdown shall be furnished.
b.
Electrical equipment and instrumentation shall comply with GP 12-45 and GP 30-70.
c.
Machinery protection systems shall comply with GIS 34-705.
12.3
Overspeed shutdown system
12.3.1
General
12.3.1.1
Add Vendor shall demonstrate (by calculation or otherwise) that the system response time will allow compliance with this clause (refer to 12.3.4.7).
12.3.2
Electronic overspeed detection system
12.3.2.1
Modify to Read a.
An overspeed shutdown system based on 2oo3 voting logic shall be furnished.
b.
System shall have three independent channels, an uninterruptible power source, and self diagnostic facilities.
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REVISION FOR REVIEW 11 January 2010
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
12.3.3
Electro-hydraulic solenoid valves
12.3.4
Trip valves/combined trip and throttle valve
12.3.4.2 12.3.4.5
Add Trip valve strainer material shall be monel.
12.3.4.7
Add Vendor shall submit the calculation, which shall be subject to BP approval.
12.5
Instrument and control panels
12.5.1
Modify to Read Such panels shall be designed and fabricated in accordance with GP 30-65.
Add 12.5.4
a.
Junction boxes, bulkhead plates, cable transits, and blind enclosures shall have fixed identification tags.
b.
Tubing runs and multitube bundles shall be tagged at each end.
c.
Tubing of any length that passes through a wall, bulkhead, or equipment that obscures one end from the other shall be tagged at each end.
12.6
Indicating instrumentation
12.6.4
Thermocouples and resistant temperature detectors
Add 12.6.4.1
Thermocouples and resistance temperature detectors should be connected to instrument junction boxes or be otherwise suitably terminated.
12.6.4.2
a.
Vibration and axial position monitoring systems shall comply with GIS 34-705.
b.
Completed API 670, Appendix A, data sheet shall be provided.
a.
Bearing temperature monitors shall be supplied and calibrated in accordance with GIS 34-705.
b.
If space allows, each sensor shall have installed spare (not duplex).
c.
Sensors shall be securely fixed in intimate contact with bearing metal and located at bearing “hot spot”.
d.
Type of thermocouple or resistance temperature detector (RTD) shall be subject to BP approval.
12.6.4.3
14
Piping and appurtenances
14.1
General
14.1.1
Modify to Read Piping design, fabrication, examination, and inspection shall comply with GP 42-10 and GIS 34-701.
14.1.3
Modify to Read Gaskets shall be spiral wound, centering guide (CG) type, and type 304 SS with flexible graphite filler.
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REVISION FOR REVIEW 11 January 2010
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
Add 14.1.4
Piping and conduits shall be designed to give maximum operations and maintenance access.
14.1.5
Winterisation
a.
b.
If winterisation is required, mutual provisions shall be made for: 1.
Protection against freezing of gages and small piping.
2.
Supplying heat (oil circulation) to provide proper oil temperature for startup of pressure lubrication systems.
In all cases, complete drainage shall be provided for the turbine, auxiliary equipment, steam, water, and oil lines.
15
Accessories
15.1
Couplings and guards
15.1.2
Modify First Sentence to Read Couplings and guards shall comply with GIS 34-503.
15.2
Gear units Modify to Read Gear units shall comply with GIS 34-501.
15.3
Mounting plates
15.3.1
General
15.3.1.2
Add Turbine feet shall have vertical jackscrews installed in a location outside of the shimming area.
15.3.1.3
15.3.1.6
Add a.
Size and number of jackscrews shall comply with levelling requirements in 15.3.1.6.
b.
Levelling jackscrew hole size shall be at least 16 mm (5/8 in).
c.
Levelling jackscrew holes shall be drilled and tapped a length equal to or greater than jackscrew diameter.
d.
Levelling jackscrew holes shall be at least 100 mm (4 in) away from anchor bolt holes.
Modify to Read a.
Mounting plates shall be machined parallel within 0,042 mm per linear m (0,5 mil per linear ft) of mounting surface.
b.
Elevation difference between mounting plates under a single piece of machinery shall be within 0,127 mm (0,005 in), maximum.
c.
Surface finish shall be 3 μm (125 μin) arithmetic average roughness (Ra). Equipment mounting surfaces on fabricated baseplates shall also comply with this requirement.
15.3.1.12 Add a.
Peelable or laminated shims, step shimming, or tapered shims shall not be used.
b.
The maximum number of shims per support point shall be three.
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REVISION FOR REVIEW 11 January 2010
15.3.2
Baseplates
15.3.2.3
Add
15.3.3
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
a.
If equipment is mounted on a baseplate and no machine surface is available for 150 mm (6 in) level to determine baseplate levelness, 75 mm by 75 mm (3 in by 3 in) levelling targets or machined flats shall be provided.
b.
Targets or flats shall be adjacent to each anchor bolt location.
Soleplates and subplates
Add d)
Vertical levelling jackscrew holes shall be located in each soleplate corner.
e)
Soleplates longer than 1 m (3 ft) shall have additional jackscrew holes aligned with corner jackscrew holes such that spans between jackscrew holes on each side of soleplate are even and at least 1 m (3 ft).
15.5
Lubrication and control-oil system
15.5.4
Modify to Read Pressurised oil systems shall comply with GIS 34-701.
Add 15.5.7
Type of water removal device that is specified shall be mutually agreed upon with Vendor to maintain moisture levels within its specified limits.
15.7
Insulation and jacketing
15.7.1
Modify First and Second Sentences to Read
15.7.2
a.
Turbines shall be insulated and should be jacketed.
b.
Insulation and jacketing shall extend over portions of the turbine casing that may reach a normal operating temperature of 65°C (149°F) or higher.
Modify to Read a.
Insulation surface temperature shall not exceed 65°C (149°F) under normal operating conditions.
b.
Jackets and insulation shall be designed to minimise potential damage during removal and replacement.
15.8
Turning gear
15.8.1
Modify to Read
15.8.4
a.
It shall be possible to quickly restart the turbine without delay after shutdown of any duration. A turning gear shall be supplied, if necessary, to meet this requirement.
b.
Slow roll to remove the shaft bow prior to restart shall not be an acceptable substitute for a turning gear.
Add Automatic engagement shall not occur in the event of reverse rotation following a trip.
15.8.6
Modify Second Sentence to Read Consideration shall be given to: a.
Duration of use.
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REVISION FOR REVIEW 11 January 2010
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
b.
Minimum speed required for the turbine and driven equipment (including seals).
c.
Type of oil supply.
16
Inspection, testing and preparation for shipment
16.1
General
16.1.4
Modify to Read
16.1.7
a.
Quality plan and inspection and test plans shall be developed in accordance with GP 32-10, GP 32-11, and GP 32-12.
b.
Required amount of advance notice to be provided by Vendor to BP is specified in the manufacturing and test quality plan (MTQP) clause in GP 32-11.
Delete “If specified”. Add The initialled and dated checklist shall be submitted by Vendor before shipment.
16.2
Inspection
Add 16.2.1.4
An inspection plan shall be subject to BP approval.
16.2.2
Materials inspection
Add a.
Details of procedures and acceptance limits for thermal stability tests on rotors shall be supplied.
b.
Positive material identification (PMI), if specified, shall be performed in accordance with GIS 36-103.
16.2.3
Mechanical inspection
16.2.3.3
Add The following will be inspected by BP for cleanliness: a.
All equipment and all piping and appurtenances furnished by or through Vendor, prior to installation of nozzle blocks and steam chest covers.
b.
The closure of openings in vessels and exchangers.
c.
Assembly of piping.
16.3
Testing
16.3.3
Mechanical running test
16.3.3.1
Add k)
16.3.3.2
Electrical runout at the location of each proximity probe shall be measured immediately before the mechanical running test.
Add to c) The contract overspeed trip system shall be used.
Page 16 of 21
REVISION FOR REVIEW 11 January 2010
16.3.3.2
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
Add to d) The contract governor shall be used.
16.3.3.3
16.3.3.3
Add to b) 1.
Sweep of vibration amplitudes versus frequencies shall additionally be performed at minimum operating speed and at normal operating speed.
2.
Journal orbits shall be recorded at maximum continuous speed.
Modify e) to read Real time vibration data shall be recorded electronically.
16.3.3.3
Add to g) 1.
2.
Lube oil and control oil temperatures shall be held for: a.
At least 30 min at value corresponding to minimum allowable viscosity.
b.
30 min at values corresponding to maximum allowable viscosity.
For both conditions described in 1., shaft vibrations shall be measured in accordance with 16.3.3.3.b), checking in particular for oil film instabilities.
Add 16.3.3.5
For all rotors, both stiff shaft and flexible shaft, an attempt shall be made to identify critical speeds, up to the maximum test speed.
16.3.4
Optional tests and inspections
16.3.4.6
Overspeed shutdown systems test
Add Overspeed shutdown system test shall be performed. 16.3.4.8
Inspection of hub/shaft fit for hydraulically mounted couplings
Add 16.3.4.9
Trip valve test
Add Trip valve test shall be performed. 16.3.4.11
Sound level test
Modify to Read Sound level test shall comply with GIS 15-011. 16.4
Preparation for shipment
16.4.1
Add a.
Items shall be suitably packed and protected against damage during shipment.
b.
Each item, crate, bag, etc., shall be identified with the BP purchase order number and all special markings, as specified by the order.
c.
Special tools that are needed for installation and maintenance and small accessories shall be boxed and made part of the initial shipment.
Page 17 of 21
REVISION FOR REVIEW 11 January 2010
16.4.3
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
Add to a) 1.
Coating systems shall withstand maximum expected temperature.
2.
Stainless steel parts shall not be coated and shall not be exposed to inorganic zinc primers, zinc bearing paints, or zinc bearing compounds.
Add l)
Vendor shall provide a list and a warning tag affixed to the machine that details the quantity and location of materials required for shipping/storage purposes to ensure removal prior to startup checkout (i.e., moisture absorbers, bearing paper).
Add 16.4.9
Material safety data sheet (MSDS)
a.
Chemicals received at BP facilities shall have an MSDS.
b.
Before shipment, a current MSDS shall be forwarded to BP facility for each substance shipped in or with equipment.
c.
Equipment or materials that contain or are coated with any of the following shall be prominently tagged at openings to indicate nature of contents and precautions for shipping, storage, and handling: 1.
Insulating oils.
2.
Corrosion inhibitors.
3.
Antifreeze solutions.
4.
Desiccants.
5.
Chemical substances.
6.
Hydrocarbon substances.
d.
MSDS copies shall be affixed in protective envelopes to outside of shipment.
e.
MSDS shall fully comply with local regulations for MSDS preparation and shall include statement that substance is considered hazardous by regulation.
f.
If any products are exempt from regulation, a statement to that effect shall be included.
17
Vendor's information
17.2
Proposals
17.2.3
Technical data
Modify d) to Read A list of spare parts for commissioning, normal maintenance (including a major overhaul), and the main insurance spares (e.g., rotor, guide blade carriers). Add
Add 17.2.5
q)
API data sheets shall be used for all equipment.
r)
Blading limitations, approximate lateral critical speeds, and a description of the Vendor quality system.
a.
For each individual connection, allowable forces and moments on nozzles shall be stated in the proposal and confirmed after the order.
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REVISION FOR REVIEW 11 January 2010
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
b.
For the lube oil system and other auxiliary systems, a preliminary bill of materials identifying components by make, type, and materials shall be submitted.
c.
Retention time of the lube oil reservoirs shall be provided.
17.3
Contract data
Add 17.3.5
a.
Rating and design conditions of service shall be provided for all components (e.g., pumps and their drivers, heat exchangers, and heaters).
b.
Dial range for pressure and temperature indicators and control, alarm, and shutdown setpoints shall be provided.
c.
Certified outline drawings shall be supplied for main components of the auxiliary systems, such as pumps and their drivers, filters, heat exchangers, and heaters.
d.
Drawings for heat exchangers shall include dimensions of shell, tubesheets, and tubes, as applicable.
17.3.6
Certified copies of test data shall be provided to BP prior to shipment.
17.3.7
Speed amplitude curve
a.
Vendor shall provide a speed amplitude curve for each radial probe plane. This curve will show: 1.
Critical speeds below operating speed.
2.
The next critical speed above operating speed.
b.
The critical speeds (including responses at 2.5 AF and below) shall be identified as to mode.
c.
If the trip speed of the turbine is above or encroaches upon critical speed (including responses at 2.5 AF and below), a modal response plot for the rotor operating at each such critical speed shall be provided, showing the orbits of at least the following points along the rotor: 1.
Shaft ends.
2.
Bearing centrelines.
3.
Probe plains.
4.
Casing seals.
5.
All interstage seals.
d.
Each orbit shall show phase and amplitude of the major axis.
e.
Maximum and minimum design clearances at each of the points mentioned in c. shall be shown.
f.
Response plots shall be prepared for maximum and minimum bearing clearances.
g.
Critical speeds (including responses with 2.5 AF and lower) below operating speeds shall be shown with maximum allowable unbalance.
h.
Critical speeds within or encroaching upon operating speeds shall be shown using five times the maximum allowable unbalance.
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REVISION FOR REVIEW 11 January 2010
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
17.3.8
One installation manual shall be shipped with the equipment and included on the shipping list.
17.3.9
a.
Parts shall be cross referenced between cross section drawings and a complete bill of material, which shall include drawing numbers of every individual part.
b.
Lists and instructions for spare parts shall be cross referenced to the bill of materials by individual part numbers.
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REVISION FOR REVIEW 11 January 2010
GIS 34-302 Special Purpose Steam Turbines (ISO 10437 or API 612)
Bibliography BP [1]
GP 44-60, Area Classification (API 500).
[2]
GP 44-65, Area Classification (IP 15).
[3]
GIS 34-206, Steam Surface Condensers.
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