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PREPARED BY NA PTT PUBLIC COMPANY LIMITED CHECKED BY ONSHORE COMPRESSOR STATION 4 PROJECT APPROVED BY CERTIFIED (PTT) NA REV. NO. DATE REVISED BY APPROVED BY DESCRIPTION D1 18-Feb-08 NA ISSUED FOR ITB D2 13-Jun-08 REVISION ISSUED FOR ITB SPECIFICATION FOR LUBE OIL AND DRY GAS SEAL SYSTEM SPC-0804.02-30.06 REV.D2 TOTAL 16 PAGES AREA CODE OF SITE LOCATION GENERAL AREA: 6000 . PTT PLC. CONTRACT NO. PTT PLC. PROJECT NO. 0804.02

SPECIFICATION FOR LUBE OIL AND DRY GAS SEAL SYSTEM

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Page 1: SPECIFICATION FOR LUBE OIL AND DRY GAS SEAL SYSTEM

PREPARED BY NA

PTT PUBLIC COMPANY LIMITED CHECKED

BY ONSHORE COMPRESSOR STATION 4 PROJECT

APPROVED BY

CERTIFIED

(PTT) NA

REV.NO.

DATE

REVISED BY

APPROVED BY

DESCRIPTION

D1 18-Feb-08 NA ISSUED FOR ITB D2 13-Jun-08 REVISION ISSUED FOR ITB

SPECIFICATION FOR

LUBE OIL AND DRY GAS SEAL SYSTEM

SPC-0804.02-30.06 REV.D2

TOTAL 16 PAGES

AREA CODE OF SITE LOCATION

GENERAL AREA: 6000

.

PTT PLC. CONTRACT NO.

PTT PLC. PROJECT NO.

0804.02

Page 2: SPECIFICATION FOR LUBE OIL AND DRY GAS SEAL SYSTEM

LUBE OIL AND DRY GAS SEAL SYSTEM

PTT PUBLIC COMPANY LIMITED ENGINEERING SPECIFICATION

SPC-0804.02-30.06 PAGE: 2 OF 16 REV: D2

CONTENTS

CHAPTER 1 – GENERAL REQUIREMENTS .......................................................... 3

1.0 SCOPE ................................................................................................3 2.0 REFERENCE PUBLICATION....................................................................3 4.0 GENERAL ..............................................................................................4 5.0 PIPING..................................................................................................4 6.0 INSTRUMENTATION, CONTROL, AND ELECTRICAL SYSTEMS.................................5 7.0 INSPECTION, TESTING, AND PREPARATION FOR SHIPMENT...................................7 8.0 VENDOR’S DATA.....................................................................................7

CHAPTER 2 – SPECIAL PURPOSE OIL SYSTEM.................................................. 8

1. BASIC DESIGN ................................................................................................8 3. INSTRUMENTATION, CONTROL, AND ELECTRICAL SYSTEMS .......................................12 4. INSPECTION, TESTING, AND PREPARATION FOR SHIPMENT.........................................12

CHAPTER 3 – GENERAL PURPOSE LUBE OIL SYSTEM ......................................13

CHAPTER 4 – DRY GAS SEAL ........................................................................13

1.BASIC DESIGN ...............................................................................................13 3.INSTRUMENTATION, CONTROL, AND ELECTRICAL SYSTEMS ........................................13 4.INSPECTION, TESTING, AND PREPARATION FOR SHIPMENT .........................................13

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LUBE OIL AND DRY GAS SEAL SYSTEM

PTT PUBLIC COMPANY LIMITED ENGINEERING SPECIFICATION

SPC-0804.02-30.06 PAGE: 3 OF 16 REV: D2

INTRODUCTION This specification (SPC-0804.02-30.06) is based on API 614, fourth edition. The item numbers used in this specification amend, supplement and delete various clauses/paragraphs of API Standard 614. Clauses of API Standard 614 which are not mentioned in this specification remain applicable as written. This specification shall be used in conjunction with the data/requisition sheet relevant to the equipment its serve. The equipment covered by API 614 Standard and this specification shall be designed and constructed for 20 years minimum service life and at least 5 years of uninterrupted operation. Chapter 3 of API Standard 614 shall not be used unless the cross references from Chapter 2 is indicated. Chapter 1 – General requirements 1.0 SCOPE 1.1 (Add.) This specification covers the minimum requirements for lubrication, shaft sealing, and control oil systems to be used for special purpose applications. Such systems may serve compressors, gears and pumps. Compliance with this specification does not relieve the CONTRACTOR of the responsibility for furnishing equipment of proper design and construction that shall be fully suitable for all specified operating conditions. Special attention shall be paid to accessibility and easy operation of valves and instruments that are required to operate on tube and local consoles (e.g. continuous-flow transfer valves of filters and coolers, drain and vent connections of filters and coolers, etc.) and easy reading on pressure gauges and other instrument indicators. 2.0 REFERENCE PUBLICATION 2.3 (Add.) Reference engineering standard will as follow:

SPC-0804.02-20.02 Quality Requirement for Pressure Vessel SPC-0804.02-20.03 Marking for Vessels and Heat Exchangers. SPC-0804.02-30.00 General requirements for Machinery SPC-0804.02-30.06 Lube Oil and Gas Seal System SPC-0804.02-40.05 Wind and Earthquake Loading. SPC-0804.02-40.06 Design Loading for Structures. SPC-0804.02-40.07 Structural Steelwork Design. SPC-0804.02-60.01 I nstrumentation General Specification. SPC-0804.02-60.03 Package Instrument Specification. SPC-0804.02-60.06 Instrument Installation Specification. SPC-0804.02-60.13 MPC, LSC, ASC Specification. SPC-0804.02-70.01 Electrical Standard. SPC-0804.02-70.02.03 Motors. SPC-0804.02-91.01 Equipment Noise Specification. SPC-0804.02-92.01 Hot Insulation for Piping and Equipment.

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LUBE OIL AND DRY GAS SEAL SYSTEM

PTT PUBLIC COMPANY LIMITED ENGINEERING SPECIFICATION

SPC-0804.02-30.06 PAGE: 4 OF 16 REV: D2

SPC-0804.02-92.02 Cold Insulation for Piping and Equipment. SPC-0804.02-92.06 Painting SPC-0804.02-95.01 Inspection and Test for Centrifugal Compressor System. SPC-0804.02-95.06 Inspection and Test for Lube and Seal Oil System. SPC-0804.02-99.00.05 Basic Engineering Design Data SPC-0804.02-91.01 Equipment Noise Specification PR-0804.02-10.03 Design Guidelines XXXXXXXXXXX Design Basic Manual

4.0 General 4.2 (Replace by) In case of conflict between this Specification (SPC-0804.02- 30.06) and API, this Specification shall govern. In case of conflict among documents such as data sheet, standard and the others which are related to this subject, CONTRACTOR/VENDOR shall notify PTT for such conflict and proceed with the work based on PTT decision. Any alternations, repairs and replacements of parts and the method of repair thereof shall obtain PTT/CONSULTANTS approval, before CONTRACTOR/VENDOR proceeding with the work. 4.3.1 (Add.) The vendor shall base his offer on the requirements and recommendations of Chapters 2, 3 and 4 appendices. 4.3.2 (Add.) Vendor of materials, equipments, components, sub-equipments, devices and systems shall be in accordance with PTT’s project vendor list. 5.0 Piping 5.1.3 (Add.) All oil and gas piping systems shall be stainless steel. These are included the supply and drain piping parts connected to the main equipment casing or bearing housing. Stainless steel weld neck flanges, RF, with spiral wound gaskets, shall be used for all flanged connections. Flange facing finish shall be in accordance with ASME/ANSI B16.5. 5.1.7 (Replace the last sentence of this clause by) Welded fittings shall be butt welded; socket welding shall not be used. 5.1.20 (Replace the last sentence of this clause by) Instrument valves for oil and gas service shall be stainless steel with corrosion-resistant plating and stainless steel stems. 5.2.1 (Add.) Oil drains which are routed back to the reservoir shall be equipped with oil sight flow indicator. (Add) As a minimum, all drain lines shall be 1½ inch (flanged). (Add) Seal oil drain lines shall be a minimum of 1mm. per 24 mm. slope. Other oil drain lines the slope shall be 1mm. per 48 mm.

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LUBE OIL AND DRY GAS SEAL SYSTEM

PTT PUBLIC COMPANY LIMITED ENGINEERING SPECIFICATION

SPC-0804.02-30.06 PAGE: 5 OF 16 REV: D2

5.3.3 (Add.) Tube fitting shall be “Swagelok”. Tubing valves shall be “Whitey”. 5.1.26 (Add new clause) Filters, coolers and associated piping shall be equipped with valved high point vents and valved low point drains. 5.5 Intercoolers and Aftercoolers 5.5.1 (Replace by) When specified, the vendor shall furnish an intercooler between each compression stage. Intercoolers shall be air cooled. 5.5.6 (Replace by) Air coolers shall be in accordance with API std 661 and SPC- 0804.02-20.22 6.0 Instrumentation, Control, and Electrical Systems 6.1 General 6.1.2 (Add.) As a minimum, but not limited, the vendor shall furnish and mount the instruments as specified below:

- Level transmitters on oil reservoir and overhead tanks - Level controllers - Level control valves - Pressure and differential pressure controllers - Pressure control valves - Self-acting control valves - Self-acting control valves for N2-buffering on oil reservoir and degassing tanks - Electric heaters with thermostat control - Temperature controllers - Temperature control valves - Orifices - Sight flow glasses in piping

6.1.3 (Replace by) All controls and instrumentation shall be suitable for outdoor installation and operation at site ambient temperature. 6.1.7 (Replace by) The vendor shall provided block, isolation and vent-bleed valves for all instruments. 6.2 Instrument Installation 6.2.1 (Replace by) Instruments for console, gas seal module, and equipment shall be gauge board mounted. 6.2.1.1(Add.) Name plates, with the instrument tag number (as per P&IDs) and the instrument description (i.e. seal gas pressure), located on the gauge boards shall be riveted on above or below each local instrument and local display of transmitter. The gauge boards shall be securely supported to eliminate vibration, undue forces on piping and damage during shipment, storage, operation and maintenance.

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LUBE OIL AND DRY GAS SEAL SYSTEM

PTT PUBLIC COMPANY LIMITED ENGINEERING SPECIFICATION

SPC-0804.02-30.06 PAGE: 6 OF 16 REV: D2

6.2.2 (Replace the first sentence by) A panel shall be provided and shall include all panel mounted instruments for the driven equipment and driver. 6.2.3 (Replace by) Panel instruments shall be provided by VENDOR. 6.3 Alarms and Shut-downs 6.3.1 (Replace by) As a minimum, the vendor shall furnish and mount the indication, primary alarm and shutdown elements on the gauge board for each unit as specified below, in appropriate chapter and in Attachment 1 of this specification.

a) For pressure indication and transmitter: (valved and flanged connections are required) - Discharge of lubricating oil and seal oil pumps (upstream of discharge valves) - Control oil - Differential across lubricating oil and seal oil filters - Lubricating oil at the bearings - Seal oil at seals - Downstream of each pressure controller - Gas reference pressure - Seal liquid to gas reference differential - Seal gas to gas reference differential

b) For temperature indication and transmitter: (thermowell connection is required) - Lubricating oil and seal oil at inlet and outlet of lube and seal oil coolers - Lubricating oil and seal oil reservoirs at pump suction location - Degassing drum - Reservoirs c) For level indication and transmitter: (including valved and flanged level indicator) - Lubricating oil/seal oil reservoir - Contaminated seal oil separators - Seal oil overhead tank - Lube oil run-down tank - Degassing drum or collecting tank d) For alarm and/or cut-in of standby pumps and fan coolers in the operator work- stations only: (connections required as under (a), (b) and (c)) - Low lubricating oil/control oil pressures - Low lubrication oil/control oil temperature - High lubricating oil temperature downstream of cooler - Low level in lubricating oil reservoir - Seal liquid (in seal ring cavity) to gas reference differential pressure (in the case of mechanical contact seals) - Low level lube oil emergency rundown tank - High level contaminated seal oil separators - Main lube oil pump not available - Tank heater not available

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LUBE OIL AND DRY GAS SEAL SYSTEM

PTT PUBLIC COMPANY LIMITED ENGINEERING SPECIFICATION

SPC-0804.02-30.06 PAGE: 7 OF 16 REV: D2

e) For shutdown, the shutdown logic shall be executed in the UCP and the alarm shall be shown on the operator work-station: (connections required as under (a), (b) and (c)) - Low-low lubricating oil pressure - High-high level in seal oil overhead tank in the case where no accumulator is installed - Low-low seal liquid to gas reference differential pressure (in the case of mechanical contact seals) - High high Seal gas vent pressure - Low low Seal air/nitrogen pressure

6.4 Instrumentation 6.4.5.2.1 (Replace by) Liquid-filled gauge shall be furnished in locations subject to vibration. 6.4.8.1 (Add) Pressure safety valves supplied shall be conformed to API 526, 527 and 528. Stem shall be 13% Cr-steel or austenitic steel. CONTRACTOR/VENDOR shall submit the complete instrument data sheets of all pressure safety valves to PTT. (Add) Pressure safety valves shall not be rupture disc type. 6.4.8.2 (Add) The undue pressure rise shall be interpreted as the pressure in excess of 85% of the relief valve setting on lube oil systems and as the pressure in excess of 110% of the settle out pressure on seal oil systems. 6.4.9.6 (Add new clause) Control valves shall be sized such that no more than 90% and no less than 5% of the valves rated “CV” is utilized for any flow requirement. This requirement may involve consideration of two parallel valves, one sized for high flow or pressure and the other for low flow or pressure conditions. 6.5 Electrical System 6.5.3 (Replace by) All electrical components and installations located on the unit shall be suitable for area classification, gas grouping and temperature classes, and in accordance with the related PTT specifications. 7.0 Inspection, Testing, and Preparation for Shipment (Add) Requirements for inspection and testing shall be in accordance with PTT’s Specification, SPC-0804.02-95.06: Inspection and Test for Lubrication and Shaft Sealing System. 8.0 Vendor’s Data 8.3.5.2 (Replace the first sentence by) The vendor shall provide necessary spare parts included with the PTT’s required spare parts for start-up and commissioning. (Add.) Tools and fixtures required to disassemble, assemble, or maintain the unit shall be provided by the vendor as part of initial supply for the unit.

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LUBE OIL AND DRY GAS SEAL SYSTEM

PTT PUBLIC COMPANY LIMITED ENGINEERING SPECIFICATION

SPC-0804.02-30.06 PAGE: 8 OF 16 REV: D2

(Add) Torque wrenches, hydraulic devices for bolt tightening, pulley removal, coupling removal shall be supplied by VENDOR. Accumulator charging device (including pressure gauge) shall be supplied. Chapter 2 – Special Purpose Oil System 1.0 Basic Design 1.1 General 1.1.4 (Add.) Oil system components shall be provided in stainless steel. In this respect the stainless steel shall be either AISI 316L or AISI 316 Ti only. (Add.) Oil system components covered by this clause are: - Strainers - Oil Filter Set - Reservoirs - Accumulators - Run-Down Tanks - Valves and manifold valves - Degassing Drums and Collecting Drums - Piping - Flanges and Gaskets - Orifices - All other components provided by VENDOR 1.1.14 (Add) The pavement on walkways and platforms shall be grating type. Access between components (control and monitor stations) shall be, as a minimum, 600 mm. width. 1.2 Baseplates 1.2.1 (Mod.) The oil system shall be arranged in a single package on the structural steel baseplate. Components such as pumps, filters, coolers and reservoir shall be mounted directly on the structural steel. This base plate shall be separated from that of the compressor and its driver. 1.3 Oil Reservoirs 1.3.2.1.1 (Add.) Pumps and filters shall not be top-mounted on but shall be mounted on a common baseplate with the reservoir. (Add) A degassing drum or contaminated seal oil collecting tank, if require, shall not be mounted on top of the reservoir unless PTT/CONSULTANT approve. (Add.) Pumps and drivers shall not be mounted on an unsupported section of the baseplate. 1.3.3.1 (Add.) All return oil connections shall be extended below the minimum oil level or installed as shown in API 614, Appendix A, to promote degassing and avoid the generation of a static charge. Strainers are not permitted in the interior of the reservoir.

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LUBE OIL AND DRY GAS SEAL SYSTEM

PTT PUBLIC COMPANY LIMITED ENGINEERING SPECIFICATION

SPC-0804.02-30.06 PAGE: 9 OF 16 REV: D2

1.3.4 (Add.) In addition to the valved drain connection which is specified in two valved connections, shall be provided to facilitate the use of the oil purifier/conditioner. The nozzles shall be located below the minimum operating level of the oil reservoir. The drainage nozzles shall be connected at the lowest level of the oil reservoir and opposite to the suction nozzle of the oil pumps. A ¾ inch minimum size plugged connection shall be provided in each compartment to facilitate purging. The connections shall be strategically located to ensure an effective sweep of purge gas towards the vents. (Add) A clearly accessible ladder with extended handrails shall be provided when components or valves are to be mounted on a reservoir tap at least 1 meter above grade. Grade shall be considered as being the bottom elevation of VENDOR’S base. (Add) All tank nozzles of 1½” and below shall be supported with a minimum of two gussets.

(Add) Skid drain shall be piped to funnel drain (oily water sewer) ,which is inside curbed area. Curbed area shall consist of funnel drain(s) and floor drain(s). 1.3.5.1.4 (Add.) The oil re-fill enclosure shall be 4” minimum equipped with a quick opening closure and a screen mesh No. 100 stainless steel strainer. A minimum 4-inch blind flange vent connection shall be furnished for each reservoir compartment. (Add) CONTRACTOR/VENDOR shall supply the oil filling pump (drum pump). The pump shall be explosion proof motor driven type. 1.3.5.2 (Replace by) Venting provisions to prevent overpressurizing of both lube- oil in the event of gross leakage of compressor seals. These vents shall be sized to handle the calculated gas flow or one standard pipe size larger than the respective main oil return lines, whichever is greater. Since the reservoir vents must be directed outside the immediate area of the oil systems, it shall be the responsibility of the vendor of the oil systems to size the vents and to provide the flanged connections; however, the vent lines themselves and the required overpressure protection device shall be supplied by the contractor. The design of Nitrogen purge on the reservoir shall take this device into account. 1.3.5.3 (Add new clause) Oil mist/vapor from the reservoir, oil sump, gearbox, bearing housing and coupling enclosure shall be well-organized. Highest efficiency mist eliminator with minimum pressure drop shall be provided at those outlets so that oil mist discharge to atmosphere is limited to a minimum. Motor-driven mist extraction fan shall be provided (automatic start/stop). Plain-weave screen(s) shall be installed at the end of atmospheric vent line(s). 1.3.6.2.7 (Add new clause) When there is possibility of the reservoir being over pressurized due to leaking of compressor shaft seals, the reservoir bund shall be des igned to have at least the area of all return lines into the

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LUBE OIL AND DRY GAS SEAL SYSTEM

PTT PUBLIC COMPANY LIMITED ENGINEERING SPECIFICATION

SPC-0804.02-30.06 PAGE: 10 OF 16 REV: D2

reservoir. 1.3.7.2.2 (Add) Electrical heaters shall be provided with a thermostatic temperature control and a separate over temperature trip. Heaters shall also trip on low level of the oil reservoir. (Add) The oil heater shall be capable to maintain oil temperature between 80˚C to 90˚C. (Add) The connections required by this clause shall not be threaded connection but shall be welded and flanged and provided with blind flanges. 1.3.9 (Add) Appropriate oil sampling point(s) shall be provided, separated from the low point drain, with suitable tubing ball valve and plug. The preference point is the oil return line to the reservoir. The oil sampling point(s) shall be specified by name tag and tag number. 1.3.10.1 (Add) Oil purifier unit shall be supply by CONTRACTOR/VENDOR. Air Stripping type or Vacuum type shall be selected. 1.3.12 (Replace “When specified,” by) “When the top of the reservoir is 1 meter or more above grade,…” 1.4 Pumps and drivers 1.4.1 (Add) Lube oil pumps shall be 2X100%, each capable of 100 percent of the duty requirement and configuration in hot-standby mode. Both pumps shall be identical driven by electric motor (A.C.). Remote vibration monitoring shall be provided for lube oil pumps and drivers. The control System shall automatically switch over the hot stand by unit when required. 1.4.2 (Replace by) Pumps shall be horizontal mounted and external to the reservoir. Bearings of rotating parts shall be equipped with grease nipple for online grease re-lubrication. 1.4.5 (Replace by) Main and standby pumps shall be motor driven. 1.4.8 (Replace by) Motors shall be complied with IEEE 841-1994 and SPC- 0804.02-70.20.03. 1.4.12.1 (Add) Centrifugal pumps shall be conformed to SPC-0804.02-30.08 1.4.15 (Add) Pressure limiting valve shall be individually routed back to the main oil reservoir and shall be provide with flow indicator, which shall be installed above the highest oil level in the main reservoir. 1.4.17 (Add) Inline Y-type strainers with drain valve shall be installed in the suction piping of each pump. Strainer elements shall be stainless steel. 1.4.24 (Add) Coupling guards shall be non-sparking material. 1.4.25.3 (Add) Pumps and drivers shall be equipped with the accelerometers and the remote online vibration monitoring system.

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LUBE OIL AND DRY GAS SEAL SYSTEM

PTT PUBLIC COMPANY LIMITED ENGINEERING SPECIFICATION

SPC-0804.02-30.06 PAGE: 11 OF 16 REV: D2

1.5 Coolers (Add) Coolers shall be air-to-oil heat exchangers (fin fan type). Cooler fans shall be 2X100%, each fan capable of 100 percent of the duty requirement and configured to be hot standby. The control system shall automatically switch over the hot stand by unit when required. (Add) Air cooler (fin fan type) shall be conformed to SPC-0804.02-30.08 (Add) Motors shall be complied with IEEE 841-1994 and SPC-0804.02- 70.20.03. 1.5.3.6 (Replace by) In additional to the requirements of 1.5.3.1 through 1.5.3.3, air-to-oil heat exchangers (fin fan type) shall be complied with 1.5.3.6.1 and 1.5.3.6.6. 1.5.3.6.2 (Replace by) The cooler tubes shall be Series 300 stainless steel. The header boxes shall be made of hardened stainless steel plate. The header plug material shall be selected to prevent galling. 1.5.6.2 (Replace by) Temperature control valve shall be an internal thermostat operated three-port valve. 1.5.8.2 (Replace by) Vents and drains on oil side shall be piped back to the reservoir through flow indicators. 1.6 Filters 1.6.1 (Add) Oil filters shall be 2X100%, each capable of 100 percent of the duty requirement. Filters shall be equipped with the following; - Vent valves - Drain valves - Equalization/fill valve. - Transfer valve - Local differential pressure gauge - Differential pressure transmitter (Add.) Filter housing shall be Series 300 stainless steel and shall be in accordance with ASME SEC VIII, DIV I. Filter housings shall have concaved vessel bottoms. They shall be provided with a valved drum with no protrusion inside the vessel preventing completely drainage or allowing foreign material to accumulate. (Add.) Manufacturing drawings of the filters shall be subjected to PTT/CONSULTANT for approval. (Add.) Hydraulic oil filters shall be supplied as same specification as oil filters mentioned above. (Add) Oil filter housing and cartridge filters shall be “PALL” U.S.A or “InDufil” The Netherlands. 1.8 Accumulators 1.8.1 (Replace by) Accumulator(s) shall be provided to maintain oil pressure while the

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LUBE OIL AND DRY GAS SEAL SYSTEM

PTT PUBLIC COMPANY LIMITED ENGINEERING SPECIFICATION

SPC-0804.02-30.06 PAGE: 12 OF 16 REV: D2

standby pump accelerates from idle condition to operating speed. The control pressure shall be maintained above the equipment manufacturer’s minimum specified, supply pressure at all operating conditions (including transients). Typically, this will be within 10 percent of the normal system pressure. Accumulators shall be of the bladder type. Pre-charge of the bladders shall only be done with dry nitrogen. The pre-charge pressure shall be indicated on the vessel. Accumulators shall be provided with a lock open block valve and drain/vent valve to permit removal during operation of the oil system (see Figures 2A-15, API 614) (Add) Accumulator shall be sized for at least 5 seconds to permit start up of the stand-by pump from cold condition. (Add) Check valve shall be provided in each header between the oil filters and accumulators. The pressure transmitter for start/stop standby pump shall be located upstream of this check valve. 1.8.3 (Replace by) Accumulator vessels shall be made of Series 300 stainless steel. 1.9 Overhead Tanks 1.9.2.1 (Replace by) Emergency lube oil rundown tank shall be used for emergency lube-oil supply for the whole compressor train (compressor, driver and gearbox). The rundown tank (either atmospheric or pressurized) shall be provided by the vendor. The vendor shall specify the coast-down time period, but this period shall not be less than 3 minutes of normal lube-oil pump running (see Figures 2A-13A and 2A-13B). The tank shall be made of Series 300 stainless steel. 1.9.2.2 (Add.) The bottom outlet connection of emergency lube oil run-down tanks shall extend at least 25 mm. inside the vessel in order to retain foreign matter. In addition a flush mounted 1 inch flanged drain connection shall be provided. 1.9.2.3 (Add.) Tanks shall be equipped with level sight glasses. 3. Instrumentation, Control, and Electrical Systems 3.1.1 (Add) Only arrangement 3 shall be applied. Pressure and level transmitters shall be used. Switch type shall not be used. Table 1: Note D (Replace by) Pressure transmitter needed to start standby pump at pressure low alarm setting value. 4. Inspection, Testing, and Preparation for Shipment (Add) Requirements for inspection and testing shall be in accordance with PTT’s Specification, SPC-0804.02-95.06: Inspection and Test for Lubrication and Shaft Sealing System.

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LUBE OIL AND DRY GAS SEAL SYSTEM

PTT PUBLIC COMPANY LIMITED ENGINEERING SPECIFICATION

SPC-0804.02-30.06 PAGE: 13 OF 16 REV: D2

Chapter 3 – General Purpose lube Oil System -- This Chapter shall not be applied. Chapter 4 – Dry Gas Seal 2. Basic Design 2.1.1 (Add) Dry gas seal system shall be designed in accordance with the following minimum technical requirements and the diagram in Attachment 2. - Dry gas seal system shall be designed individually for each compressor. - Seal gas shall be identically with process gas, tapped from compressor discharge side of each compressor. - Separation gas shall be Nitrogen. The gas consumption shall be minimized by selecting the appropriate oil/gas separation seal. - Seal gas supply system shall be flow control and monitoring by transmitters and differential pressure transmitters and/or pressure transmitters. - Rotating seat shall be Bi-directional type. Gas seal cartridges of NDE and DE side shall be the same size and identical and interchangeable to each other without any cartridge disassemble. - Seal gas booster shall be furnished to maintain sufficient seal gas pressure and flow rate to dry gas seal during compressor start up, shutdown, slow roll and pressurized standby. Operation of seal gas booster unit shall be automatically start/stop and shall be also commanded via manual start/stop button. The other gas filters shall be provided at suction of booster unit. - Seal gas and seal gas booster shall be vented to flare. - Seal gas filter & Separation gas filter shall be 2x100% with transfer valve. All filters shall be "INDUFIL" MAKER, made from stainless steel. Filter element shall be of stainless steel wire mesh type. - Safety valves with isolation valves and by pass valve shall be provided. - Drain port with sight glass (connected to flare with isolation valves) shall be furnished for each dry gas seal. - Primary and secondary vents shall be connected to flare. - Separation/Buffer gas (nitrogen) shall be vent to safe area. At the end of these vents shall be equipped with flame arrester. 2.1.8 (Replace by) VENDOR shall provided block, isolation and vent-bleed valves for all instruments. 3. Instrumentation, Control, and Electrical Systems 3.2.2 Arrangement 1: This clause shall not be applied. 3.2.3 Arrangement 2: This clause shall not be applied. 3.2.4 Arrangement 3: This clause shall be applied. 3.3.2.1 (Add.) Pressure safety valves shall not be rupture disc type. 4. Inspection, Testing, and Preparation for Shipment (Add) Requirements for inspection and testing shall be in accordance with PTT’s

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LUBE OIL AND DRY GAS SEAL SYSTEM

PTT PUBLIC COMPANY LIMITED ENGINEERING SPECIFICATION

SPC-0804.02-30.06 PAGE: 14 OF 16 REV: D2

Specification, SPC-0804.02-95.06: Inspection and Test for Lubrication and Shaft Sealing System.

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LUBE OIL AND DRY GAS SEAL SYSTEM

PTT PUBLIC COMPANY LIMITED ENGINEERING SPECIFICATION

SPC-0804.02-30.06 PAGE: 15 OF 16 REV: D2

ATTACHMENT 1 Alarm and trip requirement for oil console and dry gas seal console

Description Device Alarm Trip 2 out of 3 voting

Lube oil supply press. PT Yes Yes Required Hydraulic oil pressure PT Yes Yes Required Control oil pressure PT Yes Yes Required Lube oil tank level LT Yes Oil Pump vibration (s) Accel. Yes Oil Pump driver vibration (s) Accel. Yes

Stand by pump running Yes Lube oil supply temp high TE Yes Yes Required Lube oil tank temp high TE Yes Lube oil filter diff press. PDT Yes Lube oil supply flow rate to Gas generator FT Yes

Oil pump disch press.(s) PT Yes Oil temp inlet cooler TE Yes Oil temp outlet cooler TE Yes Cooling water inlet temp TE Yes Seal gas booster unit running Yes

Separation gas supply press.(s) PT Yes

Seal gas supply press.(s) PT Yes Separation gas filter diff press. PDT Yes

Seal gas filter diff press. PDT Yes Seal gas primary leakage ,drive end FT Yes Yes Required

Seal gas primary leakage ,non-drive end FT Yes Yes Required

Seal gas secondary leakage ,drive end FT Yes

Seal gas secondary leakage ,non-drive end FT Yes

Seal gas outlet heater temp TE Yes

Status of all motors,heaters ( run ,stop,fail)

Yes

Note: Pressure, level and flow sensing device shall be transmitter type, switch type shall not be used.

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LUBE OIL AND DRY GAS SEAL SYSTEM

PTT PUBLIC COMPANY LIMITED ENGINEERING SPECIFICATION

SPC-0804.02-30.06 PAGE: 16 OF 16 REV: D2

ATTACHMENT 2

Dry Gas Seal Schematic Diagram

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