Compressor Centrifugal Nao Spc d Re 005

TALISMANE N E R G y

NAO ENGINEERING SPECIFICATIONS - ROTATING EQUIPMENT

COMPRESSORS - CENTRIFUGALNAO-SPC-D-RE-005

COMPRESSORS.CENTRIFUGAL

Issue: 2011/01/01

Next Review Date:June 2011 Published by:

HSE/OI Staff Responsible: Talisman Energy Inc.Rotatina Equipment Technical Authority Operational Integrity Department

APPROVALS:Calgary

Tech Auth:Copyright is owned by Talisman Energy Inc. All

Eng. Auth: rights are hereby reserved. This document (inwhole or in part) may not be reproduced, stored in

VP-HSEOI: a retrieval system, or transmitted, in any form ormeans, without the prior written permission ofTalisman, or as expressly permitted by law.

Note: This is an existing specification currently being used by Talisman and has not beentechnically reviewed or signed off by the Technical Authority at this time. Over time, thesespecifications will be rebuilt and validated through a specification review process. Pleaseensure that you use the most current copy of the specs listed on the NAO Portal underEngineering Specifications. The Technical Authority identified on the cover sheet is the point ofcontact for this specification.

Attention: Paper copies are uncontrolled. This copy is valid only at time of printing, 12/15/2010.The controlled document is available on the Talisman NAO Portal.

TALISMAN ENERGY INC. GENERAL SPECIFICATION

CENTRIFUGAL COMPRESSORS Rev 2 Oct 1996 Page 1 of 12ES1.K101

TABLE OF CONTENTS

1. GENERAL ................................................................................................................................2

2. BASIC DESIGN ........................................................................................................................ 3

3. ACCESSORIES ........................................................................................................................7

4. INSPECTION, TESTING, AND PREPARATION FOR SHIPMENT........................................ 10

5. VENDOR'S DATA ..................................................................................................................12

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1. GENERAL

1.1. Scope

1.1.1. This specification describes the TLM requirements for centrifugalcompressors conforming to API Standard 617 as modified herein.

1.2. General

1.2.1. All requirements of this specification are additions to those of API

Standard 617, fifth edition, unless otherwise qualified as a substitutionfor the API Standard. From Section 2 of this specification onwards, the-titles and numbering follow those of API 617. As a result of this gaps innumbering may occur.

1.2.2. Unless otherwise specified, the compressor vendor shall be responsible

for the coordination of the design and for the satisfactory functioning ofthe complete unit, ie. compressor, driver and ancillaries. In cases wherethe compressor vendor supplies equipment that he has notmanufactured, he shall be responsible for ensuring that the designs ofthese items are compatible with each other and with his own equipmentin all respects and they shall be included in his guarantee. In particularthey shall be compatible dimensionally, in performance, in control and invibration, such that a fully integrated unit is achieved.

1.3. Applicable Regulations, Codes, Standards and Specifications

TLM Specifications

1.3.1. All centrifugal compressors shall be designed, manufactured and tested

in accordance with this specification. The following TLM specificationsform part of this specification:

. ES1.L 101 Piping design and Plant Layout

. ES1.L104 Piping Material

. ES 1. L 103 Piping Classification

. ES1.L 104 Welding

. ES1.L 102 Piping Fabrication, Installation Testing

. ES1.v101 Unfired pressure Vessels

. ES1.E101 Shell and Tube Heat Exchangers

. ES1.C201 Air Cooled Heat Exchangers

. ES1.J101 Instrumentation

. ES1.N101 Electrical

. ES1.z403 Painting and Coatings

. ES1.z406 Noise Control

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1.4. Other Regulations, Codes and Standards

1.4.1. All centrifugal compressors shall comply with the latest editions of the

following:

. API 617 - Centrifugal Compressors for General Refinery Service

. ASME Boiler and Pressure Vessel Code

. A5TM A350 - Footings, Carbon and Low Alloy Steel, Requiring NotchToughness Testing for Piping Components

. ASTM A352 - Steel Castings, Ferritic and Martensitic, for PressureContaining Parts, Suitable for Low Temperature Service

1.4.2. Conflict Between Specification, Codes and Standards

. Where a conflict occurs between this specification and anyspecification, regulation, code or standard which has been specifiedfar a particular service or item of equipment, then TLM shall beconsulted and a ruling in writing shall be obtained before any work isstarted.

. Where regulatory codes or regulations conflict with this specification,the more rigid specification shall govern.

2. BASIC DESIGN

2.1. General

2.1.1. In addition to the requirements of API 617 Noise Limits shall comply to

the requirements of GS 406 Noise Control.

. Compressors having variable speed drives shall, whenever possible,be designed to meet all specified operating conditions, by speedchange alone. For those operating conditions that (cannot be met inthis manner, alternate methods shall be stated in the vendor's

proposal and shall be subject to approval by TLM prior to orderplacement.

. Direct coupled units shall be used where practical to avoid the use of

gears.

2.1.2. Where single shaft gas turbines or constant speed electric motors areused for compressor drivers, Contractor shall verify that the turndownratio (through the use of inlet guide vanes, throttle valves, etc.) isadequate for ambient air temperature variations and/or anticipatedpartial load operations. Two shaft gas turbines drives shall be specifiedwhere necessary.

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2.1.3. In applications there parallel operation of compressors is expected, the

Vendor shall specify the minimum acceptable slope of the compressorcurve (% rise from normal operation point to surge).

2.1.4. The compressor Vendor (or gas turbine Vendor when driver is a gasturbine) shale provide factory representatives to supervise the initialinstallation and initial operation. The initial and normal startupprocedures shall be prepared by the Vendor.

2.2. Casings

2.2.1. For casing design temperatures below -29°C casing material shall have

the impact strength required by ASTM A350 or A3S2.

2.2.2. The compressor Mendor shall determine the maximum casing working

pressure in accordance with the requirements of ASME Code SectionVIII. The Thickness of the casting shall include at least a 3mm corrosionallowance.

2.3. Interstage Diaphragms and Inlet Guide Vanes

2.3.1. Diaphragms for horizontally split compressors shall have provision forjacking and lifting to permit removal without damage.

2.3.2. Diaphragm cooling-is unacceptable.

2.4. Casing Connections

2.4.1. For horizontally split casings, all main process piping connections, and

as far as possible other connections, shall be located in the lower half ofthe casing.

2.4.2. Seal welding of threaded connections is not permitted.

2.4.3. All lube and seal oil lines downstream of the main filters shall be welded

Type 18-8 stainless steel. Valves shall be carbon steel with stainlesssteel trim, flanged or socketweld type.

2.4.4. Instrument and controls shall be installed with suitable insulation topermit removal of the device while the system is operationaL.

2.4.5. Depending on the application and the compressor design, thecompressor may be required to withstand forces and moments higherthan those quoted in API 2.5.1. The figures to be used shall be subjectto approval by TLM.

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2.5. Rotating Elements

2.5.1. All components subject to axial thrust shall have positive axial locationon the shaft.

2.5.2. The compressor Vendor shall, jointly with the driver Vendor, establishthe maximum transient torques that will occur in the shafting systemunder start-up, running, and fault conditions. All components, includingthe coupling, and the fit of the coupling hub on the shaft, shall besuitable for at least 115% of this figure.

2.5.3. On sour services as defined in ES1.v1 01, riveted impellers shall beused only with the approval of TLM.

2.6. Bearings and Bearing Housings

2.6.1. Radial Bearings

. Bearings shall be capable of full speed, full load operation. They shallalso withstand reverse rotation for a period of time without damage.

2.6.2. Thrust Bearings

. Bearings shall be fitted with embedded temperature sensors to detect

metal surface temperatures.. Thrust bearings shall be capable of operating in reverse rotation, at

maximum continuous speed and with full load, without damage, for aperiod of time.

2.6.3. Bearing Housings

. When separate seal and lubricating oil systems are to be used,positive separation of the seal and bearing housings shall be providedto ensure that cross flow of seal oil into the lubricating system cannotoccur.

. The design of shaft and casing shall be such that space is available tofit a shaft grounding brush to overcome bearing problems resultingfrom electrical discharge between shaft and earth.

2.7. Shaft Seals

2.7.1. The range of conditions against which the seals are to operate willnormally be specified on the purchaser's data sheet or agreed prior toorder placement. In the absence of specified operating conditions, thesealing systems shall be suitable for operations over the pressure rangefrom atmospheric to maximum allowable working pressure stipulated in2.2.1 of this specification.

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2.7.2. Seals shall be designed for removal on site without the application ofheat and without moving the driving or driven equipment, including gearboxes.

2.7.3. Unless it is certain that seal oil contaminated with process gas will

remain suitable for direct re-use, the seal inward (contaminated) flowshall not exceed 50 Iires per seal per day. This shall apply even if theseals are normally buffered by a clean non-contaminating gas.

2.7.4. Mechanical (contact) seals shall prevent process gas leaking to the

atmosphere and seal oil leaking into the process gas stream under allspecified conditions of operation, including startup and shutdown.

2.7.5. The vendor shall state in his proposal the method(s) to be used to de-gas and to clean contaminated seal oiL. Any system requiring degassingor cleaning of seal oil shall additionally be provided with facilities tocollect, store and subsequently dispose to waste contaminated oiL. Suchstorage capacity shall accommodate at least 3 days normalconsumption.

2.7.6. Where gas has to be vented to ensure proper drainage of oil and toprevent any oil reaching the gas side, the gas flow required shall bespecified by the Vendor.

2.7.7. The seal arrangement shall be such as to ensure sealing when the

compressor is not running and the seal-oil system is shutdown.

2.7.8. The process gas composition and the operating conditions will be statedon the TLM data sheet. The compressor vendor shall state whether ornot buffer gas injection is necessary, to prevent corrosion of seals andoil contamination, or to prevent subatmospheric pressures or extremetemperatures being imposed upon the seals.

2.8. Dynamics

2.8.1. The compressor manufacturer shall ensure that both the torsional andthe lateral critical speeds for the driver, compressor and transmission,as a complete coupled set, installed at site, are acceptable as requiredby API 2.9.1. The compressor Vendor shall provide TLM with supportingdata to this effect.

2.9. Vibration and Balancing

2.9.1. Balancing procedures shall be such that rotor and couplinginterchangeability can be achieved without the need for rebalancing.This will require rotors to be first balanced without couplings, and then tobe check balanced with coupling hubs mounted. For rotors running atabove 6000 rpm, alternate methods of balancing may be proposed forTLM approval.

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2.9.2. The method of proving the calibration and sensitivity of the balancingmachine shall be subject to TLM approval.

2.10. Lube-Oil and Seal-Oil systems

2.10.1. Overhead seal oil tanks shall have sufficient capacity to seal gas in thecompressor for a minimum of five minutes after compressor unit hasshutdown due to low seal oil leveL.

2.10.2. To prevent cooling water from entering the lube oil system, the lube oilpressure shall be in excess of the cooling water pressure. Aerial coolersare preferred.

2.11. Materials

2.11.1. Compressors in sour service shall conform to the requirements ofES1.L 102 and ES1.v1 01.

2.11.2. Repairs by welding to castings shall not commence without the priorapproval of TLM.

3. ACCESSORIES

3.1. Drivers

3.1.1. The rating of drivers shall be subject to TLM approvaL. In all cases, thedriver shall be capable of continuously developing 110% of the powerrequired for each specified operating condition, including transmission

losses, at the corresponding speed and with the specific utility andambient conditions.

3.1.2. Unless otherwise specified, motor drivers shall be in accordance with

ES1.N101.

3.2. Couplings and Guards

3.2.1. The coupling type to be used shall be subject to approval by TLM.

3.2.2. A coupling which does not conform to API 617 will be considered, but in

this case full design details and evidence of successful operation will berequired for approval by TLM.

3.2.3. The following shall apply to flexible disc couplings:

. Spacers shall be positively constrained from flying out in the event offailure of the flexible membranes.

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· Full supporting information shall be provided to demonstrate that theflexible elements have an 'infinite' life under all conditions of torque,speed, axial movement, lateral and angular misalignment that can beencountered in normal service and at start-up. This information shallinclude Goodman diagrams showing steady and alternating stressesfor each situation and the assumptions used in the calculations.

3.2.4. Unless approved by TLM, coupling hubs should be arranged forhydraulic mounting and dismounting.

3.2.5. The following shall apply to gear couplings:

· Each set of teeth shall be provided with a measured lubricating oilsupply. The instruments used for measuring the oil flows shall be of atype in which all parts in contact with the oil are of steel construction.The arrangement of the coupling guard, piping, oil flow measuringinstrument, orifices, etc. shall be such that dismantling of the guard isnot necessary to clear a blockage in an oil supply line. The oil supplyshall have filtration.

· The design shall be such that teeth can be inspected withoutdisturbing the hubs.

3.3. Mounting Plates

3.3.1. The compressor shall be furnished with a base plate.

3.3.2. A single continuous base plate for compressor gear units and driver

should be provided.

3.4. Instrumentation

3.4.1. Instrumentation shall comply to the detailed specifications in inquiry ororder. All instrumentation for compressors and auxiliary equipment shallcomply with GS 401 Instrumentation.

3.5. Control Systems

3.5.1. The type of control system will be specified on the TLM data sheet.

3.5.2. Alarms and Shutdowns

3.5.3. The instrumentation listed below shall be provided as a minimum

required.

. Indicator Alarm Shutdown

. Inlet pressure for each section

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. (see note a) x

. Inlet temperature for each section x

. Outlet pressure for each section x0 Outlet temperature for each section x x. Reference gas pressure x0 Balance drum differential pressure x. Buffer gas differential pressure x x. Compressor flow for each section. (see note b) xe Recycle flow for each section x0 Compressor speed x. Shaft vibration at each bearing x x. Rotor axial position x x x. Bearing drain oil temperature x. Thrust bearing metal temperature x x. Lubricating oil supply pressure x x x. Seal oil differential pressure x x x. Manual local shutdown x. Remote shutdown x

Notes: a)Suction pressure indicators shall be downstream of any filters.

b)For side stream machines, suffcient flow indicators shall be provided to allow theflows through each compressor section to be deduced.

c)Tapping points for section inlet and outlet pressures and temperatures shall besuffciently removed from the compressor to ensure accurate readings.

3.5.4. Instrumentation for the driver and transmission, which shall becoordinated by the compressor vendor, shall also be provided.

3.5.5. On-load alarm and trip testing facilities shall be provided. The systemsused shall be subject to approval by TLM.

3.5.6. Electrical Systems

3.5.7. Electrical equipment shall be CSA approved and shall bear the CSA

approval Monogram. If for any reason this is unattainable, approval inwriting of the appropriate Provincial Electrical Inspection Authority shallbe obtained.

3.5.8. Installation shall conform to the requirements of the Canadian standards

Association and the Provincial Inspection Authority.

3.5.9. Vibration, Position and Bearing Temperature Detectors

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3.5.10. Axial position monitors shall have alarm and shutdown outputs of bothdirections of thrust. Unless otherwise approved, probes should bemounted in holders that permit adjustment and removal while the unit isrunning.

3.6. Piping and Appurtenances

3.6.1. GS 101 shall apply to all lubricating oil, seal oil and control oil pipingprovided by Vendor.

4. INSPECTION, TESTING, AND PREPARATION FOR SHIPMENT

4.1. Inspection

4.1.1. Shop inspection by TLM will be required. The extent of inspection shallbe subject to approval by TLM for each order but the following list is aguide:

. Documents and records requiring approvaL.

. Materials of all critical components;

. Fabrication procedures, particularly for fabricated casings, including

welding procedures, heat treatment, non-destructive testing, welderqualifications;

. Shaft runout at locations of proximity probes;

· Dimensions of critical components including impellers, bearings andseals. Dimensions of all close clearances. Dimensions and relativepositions of nozzles, supports, couplings, shaft ends, etc. affectingassembly on site;

· Weights of major components to be lifted during maintenance on site,e.g. rotor, casing components.

. Tests and construction checks to be observed.

. Non-destructive testing of impellers;

. All proposed repairs;

· Balancing of components;

. Painting and corrosion prevention;

. Packing;

. Fit of main and spare rotors in cylinder, including shutte clearance

with thrust pads removed;· Any other tests specified in the Quality Plan;. Tests and construction checks to be witnessed.

o Balancing of rotor assemblies. Calibration check on balancing

machine;. Hydrostatic and gas testing of all pressure components;

· Mechanical running tests on individual machines and, whereapplicable, on complete trains.

. Performance tests;

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. Sound level tests;o Post-test inspection of components;

. Cleanliness.

4.2. Testing

4.2.1. Hydrostatic Test

4.2.2. The hydrostatic test shall be as specified in API 617. The duration of thetest shall be a minimum of 4 hours.

4.2.3. Mechanical Running Test

4.2.4. The mechanical running test shall be carried out at the vendor's shop.

4.2.5. Immediately before the mechanical running test, the shaft runout shallbe measured at the location of each proximity probe.

4.2.6. For all machines, the sweep of vibration amplitudes versus frequencies

at maximum continuous speed, as required by API 4.3.4.3.2, shalladditionally be carried out-at the minimum operating speed and at thenormal operating speed.

4.2.7. If the shaft seals are not subjected to maximum pressure during the

performance test, they shall be pressurised with a suitable gas to themaximum pressure against which they may have to operate to test theintegrity of the shaft seals and their ancillary systems. Checks shallinclude measurement of seal oil flow rates both inward towards theprocess and outward towards atmosphere. The shaft should be rotatedat as high a speed as possible during the test. If pressure levels arecompatible, this test may be combined with the leak test of clause 4.3.5of API.

4.2.8. Instrument panels shall be tested at the panel vendor's shop.

4.2.9. Optional Tests

4.2.10. Requirements for Performance Tests, Complete Unit Tests, TandemTests, Gear Tests and Sound Level Tests will be specified or agreedprior to order placement.

4.3. Preparation for Shipment

4.3.1. All exterior surfaces shall be finished coated in accordance with TLM

ES1.Z403 Painting and Coatings.

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5. VENDOR'S DATA

5.1. Proposals

5.1.1. The following information shall be provided in addition to that listed inAPI Section 5.1:

· Noise levels, with and without attenuation features where applicable.· Casing maximum working and maximum allowable working

pressures.· Justification for the use of combined lubricating and seal oil systems,

where applicable.· Method proposed for de-gassing and cleaning contaminated seal oiL.· The range of conditions over which the seals can operate, including

any low pressure limitations.· Flow rates for buffer gas and seal oil trap gas venting.· Approximate values for lateral and torsional critical speeds.· Vendor's Quality Assurance Manual shall be submitted for TLM

approval with the vendor's quotation.

5.2. Contract Data

5.2.1. The drawings shall require TLM approval prior to any manufacturing or

fabrication.

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