Compressor- Reciprocating API 618-1

TALISMAN E

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NAO ENGINEERING SPECIFICATIONS - ROTATING EQUIPMENT

COMPRESSORS - RECIPROCATING API618 NAO-SPC-D-RE-001

COMPRESSORS. RECIPROCATING API 618 Issue: 2011/01/01

Next Review Date: June 2011

HSE/OI Staff Responsible: RotatinQ Equipment Technical Authority

Published by: Talisman Energy Inc.

Operational Integrity Department Calgary

APPROVALS: Tech Auth: Eng. Auth: VP-HSEOI:

Copyright is owned by Talisman Energy Inc. All rights are hereby reserved. This document (in whole or in part) may not be reproduced, stored in a retrieval system, or transmitted, in any form or means, without the prior written permission of Talisman, or as expressly permitted by law.

Note: This is an existing specification currently being used by Talisman and has not been technically reviewed or signed off by the Technical Authority at this time. Over time, these specifications will be rebuilt and validated through a specification review process. Please ensure that you use the most current copy of the specs listed on the NAO Portal under Engineering Specifications. The Technical Authority identified on the cover sheet is the point of contact 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.

GENERAL SPECIFICATION

TALISMAN ENERGY INC. RECIPROCATING API 618 COMPRESSORS

Rev.

2

Oct. 1996

Page 1 of 17

ES1.K102

TABLE OF CONTENTS 1. GENERAL................................................................................................................................................. 2 2. APPLICABLE REGULATION, CODES, STANDARDS AND SPECIFICATIONS .................................. 2 3. BASIC DESIGN ................................ ........................................................................................................ 3

4. ACCESSORIES ........................................................................................................................................6 5. INSPECTION, TESTING AND PREPARATION FOR SHIPMENT ........................................................ 13

6. VENDOR'S DATA ..................................................................................................................................13

7. SUPPLEMENT FOR SOUR SERViCE...................................................................................................14

TALISMAN ENERGY INC. RECIPROCATING API 618 COMPRESSORS

GENERAL SPECIFICATION Rev.

2

ES1.K102

Oct. 1996

Page 2 of 17

1. GENERAL 1.1. Scope This specification describes the TLM requirements for reciprocating compressors conforming to API Standard 618 as modified herein. 1.1.1. All requirements of this specification are additions to those of API 618.

From Section 2 of this specification onwards, the titles and numbering

follow those of API 618. As a result of this, gaps in numbering may occur. 1.1.2. The compressor vendor shall be responsible for the coordination of the design and for the satisfactory functioning of the complete unit, ie.

compressor, driver, transmission, lubrication, pulsation dampening system and ancillaries. In cases where the compressor vendor supplies equipment that he has not manufactured he shall be responsible for ensuring that the design of these items are compatible with each other and with his own equipment in all respects. In particular, they shall be

compatible dimensionally, in perform,ance,in control and in vibration, such that a fully integrated unit is provided.

2. APPLICABLE REGULATION, CODES, STANDARDS AND SPECIFICATIONS 2.1. TLM Specification 2.1.1. All reciprocating compressors shall be designed, manufactured and tested in accordance with this specification. The following TLM

specifications form part of this specification: · ES1.L 101 Piping sign and Plant Layout

· ES1.L 104 Piping Material

· ES1.1103 Piping Classification · ES1.L104Welding

· ES1.L 102 Piping Fabrication, Installation Testing

· ES1.v101 Unfired Pressure Vessels · ES1.C201 Air Cooled Heat Exchangers · ES1.J101 Instrumentation · ES 1. N 101 Electrical

· ES1.Z403 Painting and Coatings · ES1.A406 Noise Control 2.2. Other Regulations, Codes and Standards

2.2.1. All reciprocating compressors shall comply with the latest editions of the following:

· API 618 -Reciprocating Compressors for General Refinery Service; · ASME Boiler and Pressure Vessel Code.

GENERAL SPECIFICATION

TALISMAN ENERGY INC.

RECIPROCATING API618 COMPRESSORS ES1.K102

Rev.

2

Oct. 1996

Page 3 of 17

2.3. Conflct Between Specifications, Codes and Standards

2.3.1. Where a conflict occurs between this specification and any specification, regulation, code or standard which has been specified fc a particular service or item of equipment, then TLM shall be consulted and a ruling in writing shall be obtained before any work is started.

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

3. BASIC DESIGN 3.1. Noise Limits 3.1.1. Noise limits will be specified in ES1.A406 Noise Control.

3.1.2. For lubricated cylinders, mean piston speeds shall not exceed 4.3m/s

(14 fts). 3.1.3. For non-lubricated cylinders, mean piston speed shall not exceed

3.8m/s (12.5 fts). 3.1.4. Compressors in H2S service in any concentration, together vith water in any form shall not exceed 500 rev/min. 3.2. Allowable Discharge Temperature 3.2.1. For hydrocarbon-lubricated compressors, the highest operating

temperature - shall not exceed 148°C. For sour service rated discharge temperature shall not exceed 130°C. 3.3. Critical Speeds

3.3.1. Unless otherwise agreed, the Vendor shall furnish a torsional analysis to show that no torsional vibrations occur within the limits specified in API 618. 3.3.2. If reduction gearing is provided, the design of the complete unit shall

prevent reversal of torque within the operating range. 3.3.3. In order to allow adjustment of torsional critical speed by change of

coupling spacer length, the effect of the coupling torsional flexibility on the torsional critical speeds shall be considered prior to finalizing the general arrangement drawing. 3.4. Compressor Cylinders

3.4.1. The arrangement of valves and ports in horizontal cylinders shall be such as Lo ensure complete and continuous drainage of cylinders.

TALISMAN ENERGY INC.

GENERAL SPECIFICATION

RECIPROCATING API618 COMPRESSORS ES1.K102

Rev.

2

Oct. 1996

Page 4 of 17

3.4.2. Top discharge cylinders shall not be used unless specifically approved

by TLM.

3.5. Valves 3.5.1. Spare valves and springs shall be provided with compressors as

commissioning spares, as follows:

· One complete set of valve assemblies for each different type of cylinder, plus one set of valve plates and springs for every cylinder. Where the order is for more than one compressor, spares are

required for each type of compressor only.

· Valves should be selected to achieve a minimum valve life of twelve months. Vendor's proposal shall state the type and design features of valves.

o Unloading systems that lift valve body from seat in port are not acceptable. Valve unloaders where used shall be pneumatically

operated. 3.6.

Pistons and Piston Rods With inserts of a suitable material, in order to prevent excessive wear from piston rings.

3.6.1. Aluminum pistons shall be provided

3.7.

Crankshafts, Bearings, Cross

. I heads and Crankcases

3.7.1. Crosshead glides shall be provided with replaceable wearing surfaces when the crankcase and crosshead housing are combined in a single casting. 3.7.2. Crankcases shall be fitted with explosion relief valves to the approval of TLM.

3.7.3. Crankcase breathing devices should be fitted with approved traps. 3.7.4. All compressor and driver main and crank bearings shall be of the

replaceable precision sleeve type. All sour service sleeve type bearings shall be aluminum. 3.8. Distance Pieces

3.8.1. Two compartment distance pieces shall be provided for compressors in sour service, and to all compressors on flammable gas service having

integral gas engine drivers. Each compartment shall be separately vented and drained. 3.8.2. Distance pieces shall be provided with gasketed, solid covers.

GENERAL SPECIFICATION

TALISMAN ENERGY INC. RECIPROCATING API 618 COMPRESSORS

Rev.

2

Oct. 1996

Page 5 of 17

ES1.K102 3.9. Stuffing Boxes and PackingErrorl Bookmark not defined.

3.9.1. The manufacturer's recommendation of a packing material shall be

supported by examples of satisfactory service in a similar application. 3.9.2. Packing shall be of a type permittng the replacement of the packing

without dismantlng the piston rod. 3.9.3. Vent and cooling water tubing and fittings shall be 300 series stainless

steel in flammable, corrosive or toxic gas service. Connection shall be through top of distance piece and adequately labelled.

3.10. Compressor Frame Lubrication 3.10.1. Pre-lube pumps are required. Post-lube pumps shall be provided when

recommended by the manufacturer.

3.10.2. Pressure lubrication systems shall consist of oil pump with inlet screen, all required piping, full flow replaceable cartridge type oil filter capable of removing all particles larger than 5 microns, with case valve vent, relief valve, pressure differential gauge, valves to permit cartridge

replacement without draining oil systems in addition to items specified in 618.

API

i

3.10.3. Heating shall be provided for all oil reservoirs where the minimum ambient temperature is less than the manufacturer's specified minimum start up temperature.

3.10.4. A separate oil cooler shall be provided for each compressor. The heat exchanger shall be a removable bundle type. 3.11. Cylinders and Packing Lubrication 3.11.1. Each lubrication point shall have its own line from the force-feed

mechanical lubricator.

3.11.2. Each system shall include high pressure shutdown, no flow shutdown,

filter, lube meters, pressure gauges, blowout plugs, block type distributors with pin type indicators and rupture type indicators at each

distribution point. Engine and compressor lubricator shall be equipped with elevated reservoir(s).

3.11.3. Elevated reservoirs shall be provided for makeup crankcase oil for each

engine and compressor, with provisions for filling from platform or foundation grade, complete with distributing lines.

3.11.4. Separate or partitioned reservoirs shall be provided where different types of oil are required. Minimum size of reservoirs shall provide capacity for eight weeks normal usage. Provisions shall be made to maintain adequate flow during cold weather.

TALISMAN ENERGY INC.

RECIPROCATING API618 COMPRESSORS ES1.K102

GENERAL SPECIFICATION Rev.

2

Oct. 1996

Page 6 of 17

3.11.5. Oil level regulators and filters shall be provided for engine or compressor crankcase lubrication system and for each compressor cylinder lubrication system (if compressor required different oil from engine). Oil meters shall be provided for engine crankcase.

3.11.6. Compressor shall be supplied with a tubing of suitable material for cylinder and packing lubrication. No copper tubing is to be used. 3.11.7. Cylinders shall be designed for lubrication by synthetic lubricants only when approved by TLM.

4. ACCESSORIES 4.1. Motor Drivers

4.1.1. The type and constructional requirements for electric motors will be specified by TLM. 4.2. Internal Combustion Gas Engine Drivers

4.2.1. General

· Gas engine drivers shall be manufacturer's standard design, and may be two or four cycle, naturally aspirated turbo-charged or blower scavenged, carburated or fuel injected designed for heavy duty

stationary industrial application. 4.2.2. Engine Sizing

· Rating for the specific location shall include correction for altitude and maximum ambient temperature and shall be based on five years of continuous full load operation between major overhauls. 4.2.3. Engines shall be derated as follows, unless otherwise approved by TLM:

· Turbocharged DEMA rated engines shall be derated to 90% of the maximum guaranteed horsepower - 15 r/s (900 RPM). · Naturally aspirated non-DEMA rated engines shall be derated to 80%

of maximum guaranteed horsepower output at 15 r/s (900 RPM).

· Turbocharged, non-DEMA rated engines shall be derated to 70% of maximum guaranteed horsepower output at 15 r/s (900 RPM). 4.2.4. Design Speed

· TLM shall approve the rating, maximum operating r/min, and final selection of all engines.

· The design kW demand on engines shall be set no higher than the manufacturer's rated kW based on DEMA Standards, after derating as

GENERAL SPECIFICATION

TALISMAN ENERGY INC.

RECIPROCATING API618 COMPRESSORS

Rev.

2

Oct. 1996

Page 7 of 17

ES1.K102

necessary for altitude and ambient temperature. TLM may require additional derating of engines rated by Standards other than DEMA. . Engines shall be capable of continuous operation at speed from 50%

to 100% of the approved maximum operation r/min. . Engine speed range to be recommended by the engine manufacturer

with due regard for minimum maintenance. Preferred maximum

operating speed for separable engines should not exceed 15 r/min (900 RPM). 4.2.5. Fuel Gas System . Fuel gas chemical composition pressure and other conditions shall be

specified by TLM on the Data Sheet. The Contractor shall provide a fuel system to accept fuel gas at the conditions specified. This shall include regulators, shut off valves and surge chamber complete with drain connection and isolating valve. A three-way fuel gas shut-off and vent valve actuated from panel and installed so as to shut off the

fuel and vent the engine will be provided. The vent line shall be independent of all other vent lines. 4.2.6. Starting System . Starters shall be manufacturer's standard unless otherwise specified.

. Pneumatic starte,;s lhall be the vane-type sized to start the engine at

00 C. ¡

. The starting system pipe shall include an independent quick-opening

valve to be operated from the control paneL. A manually operated block valve and a pressure relief valve shall be installed upstream of the quick opening valve. . Instrument Air is not to be used to start engine.

4.2.7. Ignition System

. A CSA approved Class 1, Group D, Division II solid-state ignition system shall be provided. . The ignition wiring harness shall be mechanically protected by

grounded, metal-shielded, flexible conduits.

. The shut-dawn system shall either ground or open the ignition circuit and shall include a time delay after fuel gas shutoff. 4.2.8. Inlet Air System . Air shall not be taken from inside the building housing the engine.

. An oil-bath air filter shall be provided. . On fuel injected engines, a backfire relief valve shall be included.

4.2.9. Engine Speed Control

TALISMAN ENERGY INC. RECIPROCATING API 618 COMPRESSORS

GENERAL SPECIFICATION Rev.

2

ES1.K102

Oct. 1996

Page 8 of 17

· Engines shall be provided with a governor for engine speed control design to accept a pneumatic or electronic signal for speed variation. · An overs peed shut down shall be provided. 4.2.10. Exhaust System

· Contractor shall supply a complete exhaust system for field installation by TLM. The system will include a residential type muffler, Burgess-Manning, Maxim or TLM approved equal suitable for exterior

mounting in a vertical position on support trunions.

· System shall be designed so that the back pressure at the exhaust manifold does not exceed manufacturer's allowance minimum.

· Adequate protection to be provided on the muffler to prevent snow, rain or condensate, from collecting in the exhaust system. · Contractor shall supply all exhaust system bellows, companion

flanges and exhaust piping.

· Outlet exhaust of stack shall be at least 8m above skid level (1.5 times estimated building height).

· Engine backfire relief valves shall be provided and manifolded so as to exhaust to one convenient location outside the building. If turbocharged engines are quoted, backfire rélief system shall be provided unless reviewed and exempted by TLM.

· Vendor will recommend an installation layout of the exhaust system indicating supports, line sizes, drain valve locations, etc. Muffler shall

not be installed adjacent to engine. · Engine-compressor installations are subject to maximum noise concentrations at tree top levels. Vendor shall provide with his

quotation qualified engineering data on emissions for the complete speed range of equipment selected to be used by TLM for calculation

of exhaust tip height. Structures to support exhaust system at design weight will be by TLM, however, variances in cost to TLM will be used in the economic evaluation of the equipment to be selected. 4.2.11. Lubrication System

· Engine shall be equipped with a crankcase oil level controller, Kenco POC-11-FS or TLM approved equal. Vendor will provide and install

lube oil piping complete with valve to a single, easily accessible location. Vendor will provide an appropriately sized common lube oil supply tank and tie in to piping at this point. · Integral engines shall be equipped with a mechanical force-feed

lubricator, Modular Lube, Model 55 or TLM approved equal when recommended by engine manufacturer for proper lubrication.

· Naturally aspirated engines rated less than 300 kW shall be equipped with a manual prelube pump to flush bearings with oil before starting.

Engines nominally rated in excess of 300 kW and all turbo-charged engines shall be equipped with an automatic prelube, postlube

system.

GENERAL SPECIFICATION

TALISMAN ENERGY INC. RECIPROCATING API 618 COMPRESSORS

Rev.

2

Oct. 1996

Page 9 of 17

ES1.K102 . If an oil distribution system is required for integral units, it shall be

Manzel or TLM approved equal. As applicable, the system shall be annunciated. . Vendor shall supply CSA approved crankcase oil heater.

. Engine shale be equipped with full flow cartridge type oil filters, Peco, Cuno, or TLM approved equal, complete with a shutdown circuit which will activate the drive shutdown system. . Filers to be remotely located for engines nominally rated in excess of

400 kW. Piping to be provided by Vendor to locate filters off the skid

within 5m of the engine. Spool details to be finalized after award of contract. . Engine shall be equipped with gear type engine lube oil pump to

provide lubrication to all important bearings and wearing surfaces. 4.3. Couplings and Guards 4.3.1. Flexible couplings shall be capable of accommodating both angular and

lateral misalignments arising during start-up and normal operation.

4.3.2. Spacers used in couplings that incorporate flexible membranes shall be positively constrained from flying out in the event of failure of the flexible

membranes. 4.3.3. Where gear type couplings are used, thrust bearings of both the driving and the driven shafts shall be capable of absorbing an additional thrust transmitted through the couplings of at least 0.25x the coupling tooth

load. This thrust shall be considered as additional to the axial loads generated within the machines.

4.3.4. Where gear couplings are used, the design shall be such that teeth can be inspected without disturbing the hubs.

4.4. Guards 4.41. All moving parts shall be guarded in accordance with Occupational

Health and Safety regulations. The material shall be sheet steel unless conditions specifically require an alternative. 4.5. Reduction Gears 4.5.1. Direct Drive should be used.

4.6. Belt Drives

4.6.1. Belt drives shall be "v" shaped oil-resistant and fire retardant anti-static type. Either integral multi-vee belts or multiple belts supplied in

matched sets shall be used. 4.6.2. The belts should be adjustable without the need to remove the guard.

TALISMAN ENERGY INC.

RECIPROCATING API618 COMPRESSORS ES1.K102

GENERAL SPECIFICATION Rev.

2

Oct. 1996

Page 10 of 17

4.7. Controls and Instrumentation

4.7.1. General

4.7.2. Instrumentation equipment shall conform to TLM specification ES1.J101.

· A separately mounted local instrument panel shall be provided, and shall contain indication of all alarms, trips and important instruments and controls for the compressor, transmission and driver, to facilitate rapid fault finding and safe control.

· Panel mounted electronic tachometer complete with appropriate

enclosure shall be provided for the engine. The tachometer shall have range from the minimum or lowest speed control point to 115% of maximum continuous speed.

4.7.3. Temperature indicators shall be bimetal type with 127mm dial stainless

steel stem, with 3/4 NPT stainless steel thermowell. Those locally mounted shall be easily visible from floor leveL. The following are the minimum to be indicated on the local panel:

· Gas inlet each stage · Gas cylinder discharge · Gas inlet to the cooler each stage · Coolant intnengine · Coolant out of engine

· Coolant into auxiliary cooling section(s) · Coolant out of auxiliary cooling section(s) · Coolant into turbocharger

· Coolant into engine lube oil cooler · Lube oil into engine · Lube oil out of engine · Lube oil into compressor 4.7.4. The following pressure measurements are the minimum to be indicated

on the skid:

· Compressor lube oil · Engine lube oil · Inlet air manifold · Fuel gas to engine · Engine lube oil filter and compressor lube oil filter and compressor lube oil filter differential gauges

GENERAL SPECIFICATION

TALISMAN ENERGY INC.

RECIPROCATING API618 COMPRESSORS ES1.K102

Rev.

2

Oct. 1996

Page 11 of 17

The following pressure measurements are the minimum to be indicated

4.7.5.

on the panel:

Suction pressure (stage I) Discharge pressure (each stage) Engine lube oil Compressor lube oil Start gas or air pressure Fuel gas manifold pressure Fuel gas supply pressure Instrument air or gas pressure

o o o

. o

.

. o

All alarms shall be individually indicated by an annunciator system on

4.7.6.

the local paneL.

The following alarms are to be regarded as the minimum required:

4.7.7.

. . .

Gas discharge, high temperature one per cylinder. Low pressure of bearing oil header(s). Scrubber high liquid levels.

The following shutdowns are to be regarded as the minimum required:

4.7.8. o

Emergency shùtdo~n facilities, arranged to directly trip motor contactors/circuit breakers, shall be provided local to the machine. This is to be in addition to and separate from any other "local" or

remote" shutdown or normal control facilities which may be routed

. . . o

o

. . . . . .

through a logic system. High gas discharge temperatures (each cylinder). Low suction pressure (stage 1) unless otherwise specified. High discharge pressure (each stage). Low discharge pressure (final stage). High engine-jacket water temperature. Low engine oil pressure. Low compressor oil pressure. Forced-feed lubricator noflow. High engine oil temperature. Engine overspeed.

Low oil level on force-feed lubricator.

o

High distance piece pressure.

o

Vibration of cooler. Vibration of compressor.

. . . . . . o o

Vibration of engine. Low coolant leveL. Low engine oil leveL. Low compressor oil leveL. Scrubber high liquid levels. Fuel gas scrubber high liquid leveL. High compressor main bearing temperature.

TALISMAN ENERGY INC.

RECIPROCATING API618 COMPRESSORS ES1.K102

GENERAL SPECIFICATION Rev.

2

Oct. 1996

Page 12 of 17

· High engine main bearing temperature.

· Fire detection c/w solenoid valve. · Gas detection c/w solenoid valve. 4.8. Piping and Appurtenances 4.8.1. Piping systems and vessels shall comply with the requirements of TLM

GS 101 and GS 201 as appropriate.

4.8.2. Threaded connections are not acceptable for process service, even if seal welded. 4.9. Frame Lubricating Oil Piping Requirements

4.9.1. All lubricating oil piping on both engine and compressor must comply with API 3.7.2 and API 3.7.3. 4.10. Intercoolers and Aftercoolers 4.10.1. I ntercoolers and aftercoolers shall comply to the requirements of this

paragraph and to the requirements of the appropriate TLM General Specifications. 4.11. Pulsation and Vibration ControllRequirements 4.11.1. Pulsation ~uppression equipment is to be designed and provided by the

Contractor. 4.11.2. Pulsation suppression devices shall be supplied in accordance with

Design Approach 1 or 2 of API 618 para. 3.9.2.1.

4.11.3. The Vendor shall provide supporting evidence to show that his proposal meets the requirements of API 618 para 3.9.2.1.

4.11.4. Pulsation damping equipment shall be designed and fabricated in accordance with appropriate TLM General Specifications. 4.11.5. Except where otherwise specified, separate moisture removal

equipment shall be provided before the suction pulsation damper at each stage. 4.11.6. Screwed connections on pulsation dampers is prohibited. 4.11.7. Adequate access for manual cleaning and inspection is required to each compartment of the pulsation damping equipment. Construction

drawings of pulsation damping equipment shall be submitted to TLM for approval prior to fabrication.

GENERAL SPECIFICATION

TALISMAN ENERGY INC.

RECIPROCATING API618 COMPRESSORS ES1.K102

Rev.

2

Oct. 1996

Page 13 of 17

5. INSPECTION, TESTING AND PREPARATION FOR SHIPMENT 5.1.1. Shop inspection by a TLM inspector will be required. All hydrostatic and performance tests shall be witnessed by TLM inspector. 5.1.2. The duration of the test shall be a minimum of 4 hours.

5.1.3. Mechanical Running Tests

5.1.4. Performance testing shall be to ASME Power Test Code-9 unless otherwise approved by TLM. 5.1.5. Each compressor shale be run unloaded at maximum speed for a

minimum of 4 hours or until the load taken by the driving motor is constant whichever is longer.

5.1.6. Where gear units are being supplied, full load testing at the gear manufacturer's works is required. 5.1.7. No dismantling for inspection other than that required by evidence of

malfunction during testing is required. 5.1.8. Preparation for Shipment

5.1.9. And all exterior surfaces shall be finish coated in accordance with ES1Z403 Painting and Coatings.

6. VENDOR'S DATA 6.1.1. Proposals shall include a separate section for the services of the

manufacturer's representative for supervision as recommended by the

manufacture. 6.1.2. A recommended spare parts list with prices shall be provided for initial commissioning and for 12 months running. 6.1.3. Proposals shall include a separate section for performance tests.

6.2. Drawings

6.2.1. Drawings shall be supplied for final approval by TLM prior to construction of vessels and piping systems. Drawings shall include but not be limited to the following listed items: . General arrangement, orientation of equipment; o Mechanical flow sheet;

o Skid design; o Detailed piping;

. Control Panel Assembly and pneumatic instrument lines.

TALISMAN ENERGY INC.

GENERAL SPECIFICATION

RECIPROCATING API618 COMPRESSORS ES1.K102

Rev.

Oct. 1996

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Page 14 of 17

6.3. Curves and Tabulations

6.3.1. The requirements of API 618 section 5.2.2 shall be included in the data books. 6.4. Data

6.4.1. The requirements of API 618 section 5.2.3 shall be included in the data books. 6.5. Vendor Drawings and Data Requirements

6.5.1. The requirements of API 618 section 5.2.4 shall apply.

7. SUPPLEMENT FOR SOUR SERVICE 7.1.1. For reciprocating compressors the service shall be regarded as sour

when the gas contains H2S levels as defined in ES1.v101. In all such cases, the materialsa and fabrication procedures shall be in accordance to NICE Standards and this Specification. i

7.1.2. Piston rods shall be either 11-13% chromium steel or an alternative material approved by TLM. i

7.1.3. Shafts and piston rods in plain carbon, low and medium alloy and 11-

13% chromium steels shall be heat treated to minimize residual stresses, and shall have a hardness not exceeding HRc22 and a yield

stress not exceeding 620 mPa (90,000 Ibf/in2). The rods maybe hardened in the region of the packing by the surface induction

hardening method. 7.1.4. Liners shall be resistant to the corrosive environment. Where cast iron

would be corroded, a suitable grade of austenitic cast iron may be proposed for TLM approval. 7.1.5. Valve plates, rings, channels, seats and stops shall be made from 11-

13% chromium steel, unless otherwise approved by TLM. The maximum hardness for these components shall be HRc30. 7.1.6. Two-compartment distance pieces shall be provided for sour gas

service. 7.1.7. Distance piece vents in sour gas service shall be positively vented with

a vacuum blower and piped into a separate vent system not subject to any back pressure and shall terminate at least 3m above the roof peak of the compressor building. 7.1.8. Distance pieces in sour service shall be piped to a separate sump which

is vented to the distance pieces vent system in paragraph 6.7 the sump must have provision for manual draining.

GENERAL SPECIFICATION

TALISMAN ENERGY INC.

RECIPROCATING API618 COMPRESSORS

Rev.

2

Oct. 1996

Page 15 of 17

ES1.K102 7.1.9. In sour service, a separate flush oil injection system into the suction to

each cylinder shall be installed. This shall be fed from a separate tank connected to the pressure lubrication system.

7.1.10. All compressor and driver main and crank bearings shall be of the replaceable precision sleeve type. All sour service sleeve type bearings shall be aluminum.

7.1.11. Compressors handling gas containing H2S in any concentration, together with water in any form shall limited to a maximum of 500 rev/min. 7.1.12. For sour service rated discharge temperatures shall not exceed 1300C.

7.1.13. For non-lubricated and sour gas compressors, a complete description of

piston, ring and rod packing design, including materials of construction and cylinder bore finish, shall be included in the proposaL.

7.1.14. Alternative materials and design may be used for compressor valves, where proof is submitted that they have given satisfactory service, subject to TLM approvaL.