Flash Gas Compressor Package-technical

Flash Gas Compressor Package Technical Bids

Company: Zhanwang Inc. Contact: Tania Liu Tel: 86-28-85140878 Fax: 86-28-86266501 Email: [email protected]

Content

Chapter I

General Information

Chapter II

Compressor

Chapter III

Drive Engine

Chapter IV

Piping System and foundation

Chapter V

Controlling System

Chapter VI

Codes and Standards

Chapter VII

Testing and Inspection

Chapter VIII

Guarantee and Service in site

Chapter IX

Painting, Packing and Shipping

Chapter X

Construction and Installment

Chapter XI

Training

Chapter XII

Outstanding Achievement

Chapter XIII

Scope of Supply

Annex 1

Special Tool List for ZWF1250T-ES604/2 Gas Compressor Unit

Annex 2

Spare Parts Lists for Start-Up of ZWF1250T-ES604/2 Gas Compressor Unit

Annex 3

Spare Parts List in two years for ZWF1250T-ES604/2 Gas Compressor Unit

Annex 4

Performance files on ZWF1250 ES604/2 Gas Compressor Unit

Chapter I

General Information

1. Design basis The technical proposal is prepared in accordance with Scope of Work for Flash Gas Compressors Package (UPD-WP-P2-ME-SW-0003) and Specification for Flash Gas Compressor Package (UPD-WP-P2-ME-0006). 2.

Environment Condition

2.1

Purpose: Boosting

2.2

Compression media: Natural gas

2.3

Condition

2.3.1

Ambiance Temperature: 40 ºC

2.3.2

Moisture: MIN 56%; MEAN 87%; MAX 93%;

2.4

Condition of Public system

2.4.1

Instrument air pressure MIN 0.45MPa, MEAN 0.8MPa, MAX 1.2MPa

2.4.2

Power supply <132KW 400V AC 3 PHASE neutral solidly earthed.3/4 wire,50Hz.

2.4.3

Startup gas and fuel gas: Temperature 64.8 ºC Pressure 2.34MPaG Refer to Table 1-1 for composition of startup gas and fuel gas: Table 1-1 Constituent H2S CO2 N2 C1 C2 C3 i-C4 n-C4 i-C5 n-C5 n-C6 n-C7 n-C8 n-C9 n-C10 C11+ H2O TOTAL

Constituent (mol %) 0.0001 2.943 1.933 89.262 5.776 0.085 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 100.00

3. Technological condition and requirement 3.1 Refer to Table 1-2 for the composition of natural gas (volume percent). Constituent

Constitution (mol %) First Stage Second Stage 5.223 61.324 5.055 9.551 25.771 13.480 17.340 4.004 21.366 3.921 9.591 0.940

CH4 C2H6 C3H8 iC4H10 nC4H10 iC5H12

Constituent nC5H12 C6H14 H2S N2 CO2 H2O

Table 1- 2 Constitution (mol %) First Stage Second Stage 5.457 0.535 2.534 0.325 0.094 0.107 0.029 0.953 1.327 4.28 6.213 0.580

3.2 Refer to Table 1-3 for design parameters. Table 1- 3 Item

Pressure of Intake air MPaG

Pressure of air Temperature of Exhaust intake air MPaG ºC

0.34 1.17

1.28 4.85

Category First Stage Second Stage 3.3

67.6 34

Air flow rate of single set 104Nm3/d 19.0 23.0

Technical requirements Reciprocating compressor unit shall be provided that is skid-mounted and driven by natural gas engine. The unit is a standard product with the latest and mature technology. It has been proved through operation on site to be safe, reliable and configuration-reasonable. The unit can be operated continuously 8000 hours with overhaul interval of 4000 hours and lowest operation life of 20 years.

4

Confirmation for site condition

4.1

In the compressed gas, the content of H2S is 0.094% at 1st stage and is 0.107% at 2nd stage. According to Clause 15.3 in API11P 1989 standard, when the H2S content is no higher than 2%, the factory standard materials should be utilized to the compressor and auxiliaries

4.2

In the compressed gas, the content of CO2 is 1.327% at 1st stage and 4.28% at 2nd stage. According to Clause 15.4.2 in API11P 1989 standard, when the inlet pressure is not exceed 400PSIG(2.758MPaG), and the content of CO2 in moist gas is not exceed 50%, compressor and auxiliary will adopt factory standard materials.

4.3

The gas compressor unit provided in the proposal completely complies with the environmental condition on site in Article 2. The unit can compress the natural gas in Article 3.1, meet the precossing requirement in Article 3.

5

Characteristics of process gas Refer to Table 1-4 for characteristics of process gas. Table 1-4 Description Critical Temperature K Critical Pressure MPaA Dry weight (molal) Ratio of specific heat

1st stage 409.6 5.0935 50.98 1.097

2nd stage 255.8 4.7046 26.89 1.187

6

General Information

6.1

Introduction to proposal

6.1.1

Natural gas compressor unit of ZWF1250T-ES604/2 packaged by Zhanwang Inc. is introduced ES604 compressor manufactured by GE in U.S.A, as the main body and L7044GSI gas engine manufactured by WAUKESHA Company of the US as the driver is recommended, which meets the meet the precossing requirement in Article 3 . The unit is integrally skid-mounted. The compressor is driven by natural gas engine through elastic coupling. It is a reciprocating piston compressor with symmetric balanced type, 4 strokes, 4 cylinders, and 2-stage compression. Air cooler is driven by electric motor. The unit is mainly composed of compressor, gas engine, inlet and discharge scrubbers, surge tank, air cooler, control and protection system and foundation, etc.

6.1.2

As shown in the Chart of Process Gas, the natural gas is fed in via the skid-side intake. After separated and filtered through scrubber, it is compressed in the 1st stage cylinder. And then, after inter-cooled, separated and filtered, it is compressed in the 2nd stage cylinder. Finally, it is purified in the scrubber for air exhaust via back cooler and then is discharged from the skid-side gas vent for the use.

6.1.3

Refer to Table 1-5 for main parameters of the unit. Table 1-5 Unit Model Intake Pressure at 1st Stage Intake Temperature at 1st stage Exhaust Pressure at 1st stage Capacity at 1st stage

ZWF1250T-ES604/2 MPaG 0.34 ºC 67 MPaG 1.205 104Nm3/d 19.09

Intake Pressure at 2nd stage Intake Temperature at 2nd stage Exhaust Pressure at 2nd stage Capacity at 2nd stage Discharge Temperature Compressor Model Compressor Stroke Cylinder number of compressor Stage number of compressor Diameter of compressor cylinder Range of compressor speed Max. power of compressor Max. design power of compressor Engine Model Range of Engine Speed Max. power engine 6.2

1.17 34 4.85 23.01 ≤ 50 ES604 152.4 2/2 2 342.9/241.3 700 – 1200 3580.8 970 L7044GSI 700 – 1200 1253

mm 1st stage/2nd stage 1st stage/2nd stage mm r/min KW KW r/min KW

Summary of performance calculation Refer to Table 1-6 for Summary of Performance Calculation of Compressor. Table 1-6

Inlet Pressure 1st

MPaG ºC MPaG 104Nm3/d ºC

Exhaust pressure

Inlet Temp

DSCHG Temp

Added Clearan

2nd

Max. Rod Load Stretch

Speed r/min

Capacity 104Nm3/d

Unit Power KW

Load Rate %

Compress

7

General description of structure

7.1

The main unit adopts GEMINI ES604 gas compressor manufactured by American GE of 4 stroke and 4 cylinders with double acting cylinders.

7.2

Driver adopts P9390GSI natural gas engine manufactured by Waukesha Engine in US with four strokes, which is V-form 16-cylinder engine with turbocharging, intercooling and is connected with compressor through elastic coupling.

7.3

The air cooler is used for cooling process air, cooling water of motor cylinder, auxiliary water of motor, lube oil cooling water of compressor and cooling water of compressor cylinder. It is composed of horizontal fin pipe bundle. The fan of cooler is driven by two-speed motor.

7.4

Cylinders with available clearance pocket

7.5

Scrubber for air admission and exhaust, buffer tank for air admission and exhaust, safety valve for air admission and exhaust, cut-off valve at the inlet, automatic bypass valve, check valve at the outlet, automatic cut-off valve at the outlet, emptying valve, etc. are provided for the process gas system, for safety transportation of compression media, startup, shutdown, loading, unloading, load-free and loaded operation of the unit, which has a function of automatic control.

7.6

Lube oil complementing oil tank are provided for compressor and motor individually, which can realize automatic complement of lube oil.

7.7

Noise elimination processing is made for exhaust pipe of motor.

7.8

Imported products are adopted in critical control instrument of the control system. Centered by PLC, primary instrument, transfer, etc. are provided to control, monitor and shutdown the unit. Corresponding communication interface is provided, which can transfer the date. The control level of the unit is relatively high and its protection is perfect.

7.9

Two pry bases are provided for the unit, including compressor installed on the main pry base, motor, pipe equipment, control panel, etc. Cooler is installed on another pry base. Complete equipment is installed on the lower base. If only process gas, fuel gas, startup gas, etc. pipelines are connected on site, complete equipment shall be put into service. The unit is has small size, low weight, compact structure and easy maintenance.

7.10

For all intake air and air exhaust of process gas, intake air and vent of fuel gas and startup gas, compressor, motor, all scrubbers, blowdown or vent of safety valves, pipes are arranged to the pry side. Pipes outside the pry shall be provided by the user.

8

Oil, electricity and gas consumption of the unit Refer to Table 1-7 for oil, electricity and gas consumption of the unit. Table 1-7 Volume of lube oil in the unit L Oil Replacement Interval H Lube Oil of Consumption of lube oil in cylinder and packing L/d compressor Yearly consumption of lube oil (not including replacement of L oil, to be calculated as per 350 days) Volume of lube oil (including oil tank, oil cooler, oil filter) L Oil replacement interval H Lube oil, of Max. daily consumption of lube oil (not including replacementL engine, gasof oil) and startup gas Max. Yearly consumption of lube oil (not includingL replacement of oil, to calculated as per 350 days) Max. consumption of fuel gas Nm3/h Consumption of natural gas in pre-lubrication and startup Nm3/h (pressure: 1.0 MPaG) Coolant One filling volume : 1200 L, closed circulation, slight consumption Control system 220VAC KW Motor for pre-lube pump in compressor 380VAC KW Power Motor of cooler 380VAC KW Others (including electric tracing) 220VAC KW

9

Recommendation for lube oil Compressor frame: Shell NGC Fluid00l compressor lube oil (SAE40);

160 2000 7 2450 340 1500 – 2100 8.5 2975 291 4.4 1.0 0.75 50 1.0

Compressor cylinders: Shell Valvata oil J460 compound cylinder oil; Engine: Shell NGC Fluid00l compressor lube oil (SAE40); Coolant for compressor and engine: Shell GUARD FREEZN coolant for industrial use. 10

Physical dimension and weight of the unit Refer to Table 1-8 for physical dimension and weight. Model of the unit Dimension on the unit (L x W x H) Total Weight of the unit Physical dimension of the compressor (L x W x H) Weight of compressor Weight of largest inspection part (cylinder) of comp. Physical dimension of motor (length x width x height) Weight of motor

11

Table 1-8 ZWF1250T-ES604/2 M15 x 4 x 4.465 x 3.30 Kg51,000 M2.4 x 4.559 x 1.1 15,000 Kg1400 M3.626 x 2.117 x 2.381 kg13040

Description of proposal

11.1 Field adaptability of the unit In the proposal, it is noticed that in the compressed gas, the institution is heavy and . In order to enable a good adaptability and reliable working of the unit to the technologic condition on site and achieve a long service life of consumable part, appropriately low operating speed shall be adopted. From Table 1-6, it can be seen that the operating speed is 950r/min under the working condition of designed air flow rate. Relatively low operating speed can bring a relatively long service life of consumable parts, such as valve, when the compressor is compressing heavyconstitution natural gas. 11.2 Capacity The capactiy can satisfy the requirement of processing gas in the Article 3. 11.3 Temperature of air exhaust The highest temperature of air exhaust among all status points is 108 (before cooled), complying with ISO13631 “regulation that temperature of air exhaust shall not exceed 135 ”. The temperature of air after cooled in the cooler shall be lower than 54 . 11.4 Rod load The maximum extension rod load under all working conditions is 158561kg, being 73.5% of rated load (21562kg). The maximum compression rod is 17486kg, being 77.0% of rated load (22696kg). The unit can be operated safely and reliably. 11.5 Counter angles Counter angles comply with the regulations in API618 standard, which guarantee

the favorable lubrication condition of the main bearing bush, connecting rod bush, and crosshead bush, etc.. 11.6 Pressure pulsation and vibration of gas stream 11.6.1 GEMINI software kit is introduced in calculation and analysis to determine the buffer volume and enable the unevenness of gas stream pressure being lower than 3%, complying with “pulsation peak value of gas stream at flange of compressor cylinder shall be limited in 7% of average absolute pressure of pipeline”, so as to control the pressure pulsation of gas stream effectively. 11.6.2 It shall be designed as per the Design Method 2 in Clause 3.9.2 in API618 standard. Acoustic effect among compressor, inhibiting device and pipeline shall be evaluated with acoustic simulation technology to determine the pulsation inhibition device and submit pulsation analyze report. 11.6.3 The compressor is of symmetric balanced type structure. Reciprocate inertial force can be completely balanced. It has good balance, small vibration and stable operation. 12 Conclusion The Proposal adapts to the field environmental condition in Article 2, satisfies the technological condition and requirement in Article 3, complies with regulations of API618 and ISO13631 standards with the speed,exhaust temperature and rod load etc. being in appropriate range. It guarantees long and continuous operation, favorable performance, safe and reliable operation of the unit and long service life of wearing part under the conditions in Article 2 and 3. Chapter 2 Compressor 1 Manufacturer: GE (General Electric) in USA. 2 Main technical parameters Refer to Table 2-1 for main technical parameters. Table 2-1 Model ES604 Orientation Facing to the back end (main oil pump), and rotating in anticlockwise direction Speed r/min 700 1200 Designed Speed r/min 950 Maximum shaft power KW 3580 Designed maximum shaft power kW 970 Allowable max.average speed of piston m/s 6.096 Designed average speed of piston m/s 40826 Rated lever load (tension/compression) kg 21562/22696 Designed maximum rod load (tension/compression) kg 15856/17486 Stroke mm 152.4 Stroke number 4 Diameter of piston mm 57.15 Diameter of main bearing location of crankshaft mm 165.1 Diameter of connecting rod neck of crankshaft mm 165.1 Diameter of cross head pin mm 88.9 Stage number of compression 2

Cooling method of cylinder Water cooling Physical dimension (length × width × height) 2.54 4.559 1.10 Weight kg 15000 3 Unbalanced force and moment of compressor When the rotary speed of compressor is 1200r/min, unbalanced force and moment are shown in Table 2-2. Table 2-2 Max. First order force N Max. First Order Moment N m Max. Second order force N Max. Second Order Moment N m Lateral Vertical Lateral Vertical Lateral Vertical Lateral Vertical 0 0 63457.0 14033.4 0 0 0 0 When the rotary speed of compressor is n, its unbalanced force and moment are the sample value in Table 2-2 multiplying coefficient (n/1200)2. 4 Brief introduction to main parts of compressor 4.1 Frame Grey cast iron heavy body with sufficient strength and rigidity. 4.2 Crankshaft Integrated alloyed steel forged crankshaft has very high fatigue strength, abrasion resistance and shock-resistant toughness. 4.3 Connecting rod Wrought steel connecting rod with H form rod section has a very high fatigue strength. 4.4 Cross head Quality carbon constructional steel cross heat with regulating spacer between the cross head body and cross head tile. Alloy steel cross head pin. Balancing weight is installed at the end of piston rod of the cross head. Matched balancing weight can control the reciprocal quality difference between the relative two columns. 4.5 Cylinder Water-cooling cylinders, good perferance at cooling and corrosion resistence. Table 2-3 Parameters of unit Stage- StageDiameter of cylinder mm 342.9 241.3 Maximum allowable operating pressure of cylinder MPaG 5.517 10.345 Action mode of cylinder Double acting Double acting Available clearance pocket Applied Applied Material of cylinder Alloy cast iron Alloy cast iron Cooling method of cylinder Water cooling Water cooling Packing Number for single cylinder (team) 1 1 Number of piston ring for single cylinder 4 4 Parameters of unit Stage- StageStructure type of air valve Reticulated valve Reticulated valve Number of inlet/exhaust valve for single cylinder 4/4 4/4 4.6 Piston and Piston Rod Hard anodized aluminum alloy or cast iron pistons. Carbon filled teflon piston rings standard. 4140 steel piston rods with rotted threads. 4.7 Valves

Steel valve seats and guards PEEK or MT valve plates are standard. 5 Supporting equipment of compressor 5.1 Coupling Disc type elastic coupling manufactured by REXNORD and TB-WOODS of U.S. are adopted. 5.2 Coupling enclosure Sparkless aluminum enclosure 5.3 Lubrication system of compressor There are two independent lubrication systems: body lubrication system and cylinder lubrication system. Both piping and pipe metirals of lubrication system adopt stainless steel. 5.3.1 Body lubrication system Electric neck/rear lube oil pump and indicator for resistance of lube oil in oil filter are provided. Oil level controller with indicator for oil level of crankcase is provided. Supplementary oil tank and low oil pressure shutdown protection device are provided. Lube oil channel: Oil tank of frame main oil pump/electric prelube oil pump oil cooler oil filter main oil way of frame. Oil replacement interval for the crankcase: 2000h or period recommended by lube oil supplier. 5.3.2 Lubrication system of cylinder Manual oil injection device, shutdown protection device for cylinder and packing and low oil level shutdown protection device are arranged. Supplementary oil tank supplements oil automatically. Volume of supplementary oil tank is 100L. Lube oil route: Oil tank of oil injector oil injector no-flow switch distributor one way valve each lubrication point of cylinder and packing. 5.4 Cooling system of compressor Cooling system of compressor is supplied by auxiliary water pump of motor. Cooling water pipe is of carbon steel. Level meter and pressure cap are arranged for expansion water tank of cooling water. Chapter 3 Engine 1 Manufacturer: Waukesha Engine in U.S. 2 Main technical parameters Refer to Table 3-1 for main technical parameters. Table 3-1 Model L7044GSI Mode V-Type, 4 strokes Mode of inspiration Turbocharging, inter-cooling Cylinder number 12 Cylinder diameter × stroke mm 238×216 Discharge capacity 115.4 Average speed of piston @1200 r/min m/s L 8.64 Compression ratio 8:1 Range of speed rpm 700 1200 Idle speed rpm 450 Rated Power KW 1253 Pressure of fuel gas MPaG 0.165-0.345 Pressure of Start-up Gas 0.827 Physical dimension of the unit (L × W × H) 3.626×2.117×2.381 Weight kg 10320 3 Rated power at different speed Refer to table 3-2 for rated power. Table 3-2 Speed r/min 700 800 900 1000 1100 1200 Continuous power kW 731 836 940 1044 1149 1253

4 Standard equipment of engine Standard equipment allocation of engine manufacturer shall be followed. 5 Supporting equipment of engine 5.1 Intake system Two-level heavy air filter with rain shelter and air resistance indicator are provided. 5.2 Fuel system High-precision filter, pressure regulating valve, fuel electromagnetic valve and safety valve are provided. 5.3 Startup system It is started by starter motor with oil sprayer. Air pressure or natural gas pressure for the start motor is 0.827MpaG. Refer to the Flow Chart of Startup System. 5.4 Air exhaust system Dedicated environmental low-frequency silencer and outdoor rainproof cap are provided. Air exhaust pipe is connected to the outside of plant. Indoor part of silencer and air exhaust pipe are heat insulated. 5.5 Lubrication system Lubrication system is mainly composed of main oil pump, pneumatic pre/after lubrication oil pump, oil cooler, full-flow oil filter, pressure-regulating valve, safety valve, supplementary oil system, etc. Both piping and pipeing materials of lubrication system adopt stainless steel. Supplementary oil tank is provided with a level indicator. Level controller supplements oil to the crankcase sump automatically. 5.6 Cooling system 5.6.1 There are two independent cooling systems, cooling cylinder, cylinder cover and air exhaust manifold of jacket water cooling system, inter-cooler and oil cooler of auxiliary water cooling system, as well as oil cooler and compressor cylinder of cooling compressor. Refer to Process Chart of Cooling System. 5.6.2 Jacket water pump and auxiliary water pump are driven by crankshaft of motor via belt pulley. 5.6.3 Capacity of jacket water is 379L. Thermo valve controls the temperature of cooling water. The temperature of jacket water at the inlet is 74 77 5.6.4 Capacity of auxiliary water is 42L. The temperature of auxiliary water at the inlet 54 . 5.6.5 High temperature shutdown protection device is arranged at the outlet of jacket water and cooling water of inter-cooler. 6 Requirement for fuel gas 6.1 Power requirement 6.1.1 The temperature of inter-cooling water at the inlet of L7044GSI natural gas engine is 54 . When the temperature of jacket water at the outlet is 82 , the relationships among WKI value, power and ignition time are shown in Fig. 3-1. WKI Value Figure 3-1 Curve of WKI Value, Power and Ignition Time 6.1.2 Refer to the following Waukesha Gaseous Fuel Calculations for WKI value of fuel gas in clause 2.5.3 in the Chapter One. Average effective brake pressure Overloading Continuous loading Ignition time lead angle of ignition WKI value calculations for UJUNG PANGKAH 6.1.3 From Fig. 3-1, it can be seen that when the WKI value of fuel gas is larger than 58, L7044GSI natural gas engine can running with full loading or over loading continuously. 6.2 Requirement for content of fuel gas 6.2.1 When the volume percent of sulfide (hydrogen sulfide, etc.) in fuel gas exceeds 0.1%,

fuel gas shall be processed. 6.2.2 Under the participated coolest temperature, it the liquid carbon hydrogen compound is converted into volume of air, its volume percent shall not exceed 2%. 6.2.3 The volume percent of free hydrogen shall not exceed 12%. 7 Discharge amount of exhaust gas 7.1 The temperature of inter-cooling water at the inlet of L7044GSI natural gas engine is 54 . When the temperature of jacket water at the outlet is 82 , the discharge amount of exhaust gas is shown in Fig. 3-3. Table 3-3 /HP.h NOX CO NMHC 23.0 2.0 0.2 7.2 Ignition module and detonation control module of L7044GSI engine monitor the operating process of each cylinder and modifies ignition timing automatically to adjust the fuel gas consumption amount and exhaust gas discharge amount of the unit. 7.3 By regulating the air burning mixing ratio of fuel gas according to different fuel gas constitution and working conditions, controlling module enables the engine to achieve optimal discharge. 8 Curve of consumption rate of fuel gas Refer to Fig. 3-2 for power and consumption rate of fuel gas under different rotary speeds. Fig. 3-2 Curve for Power and Consumption Rate of Motor 9 Correction of power 9.1 For every 5.5 increase in ambient temperature above 38 ,progressive decrease in power is 1%. 9.2 For every 305m increase in see level elevation above 1828m,progressive decrease in power is 2 . 9.3 When L7044GSI natural gas engine is operating under the ambient condition specified in point 2 of Chapter 1, its power shall decrease 1% in the maximum Fuel consumption rate ambient temperature. Chapter 4 Piping equipment and foundation 1 Overview Design of pipeline, piping equipment and foundation is completely in conformity with API618, ISO13631, and specification for GEMINI compressor matching, etc. 2 Process gas pipeline 2.1 General 2.1.1 Process gas pipeline consists of intake air pipeline and exhaust pipeline of compressor, by-pass pipeline, blow-down pipeline and drain pipeline, which is used to realize the safe delivery of compressed gas, starting of the unit, shutdown, loading, unloading, no-load operation and load operation. 2.1.2 Safety valve for intake air is arranged on intake air main, while that for air exhaust is set on exhaust pipeline. Outlets of all safety valves are connected to emptying main, for protecting the safety of the unit. 2.1.3 At the inlet of the unit, automatic dump valves are assembled, and on by-pass pipeline, by-pass autovalve is arranged, which is with automatic control function. 2.1.4 Check valve is equipped on outlet pipeline of the unit, which can prevent the downstream high-pressure gas backflows into process gas system of compressor. 2.1.5 As for air exhaust of the unit, emptying valve is arranged, while for intake air system, emptying can be realized by the manual drain valve of scrubber. 2.2 See Table 4-1 for technical parameters. Table 4-1 Stage-1Intake Manifold Stage-1 Exhaust

Manifold Stage-2 Inlet Manifold Stage-2 Exhaust Manifold Nominal Diameter mm 300 200 200 100 Designed pressure MPaG 1.0 2.5 2.5 6.3 Designed temperature 93 177 93 177 Designed flow speed m/s 8.6 7.0 7.3 8.9 2.3 Process flow As in process chart of process gas system, natural gas enters from the gas intake beside skid into the system, after being separated and filtrated in stage-1 scrubber for intake gas, flows into grade-1 compressor cylinder, where it is compressed, then after being cooled, it is compressed in stage-2 cylinder and finally is discharged from the gas vent of cooler. 2.4 Technology Specification 2.4.1 By-pass pipeline is used for starting of the unit and for loading and unloading when machine stops. In the process of starting or shutdown, for the by-pass valve is completely opened, the gas discharged from compressor flows into feed scrubber, overcoming only the resistance of by-pass pipeline and by-pass valve. Therefore, the unit is running with no load. 2.4.2 For inlet of Stage I, monitoring point for control and HP and LP alarm is arranged. As for air exhaust, monitoring point for control and high temperature and high pressure is set. 2.4.3 Piping materials comply with requirements in Seamless Steel Pipe for Transportation of Fluid GB/T8163-1999, with RF (raised face) for flange sealing face. 2.4.4 GEMINI matching technique is referred in calculation, analysis and design of pipeline and reasonable arrangement of ripple rejection device, which can effectively control the unfavorable pulsations and vibrations. Acoustics analog technology is applied for evaluating impact of oscillating on performance of compressor. Then based on the analysis report for oscillating brought forward, pipeline, pipe clamps and supports of valves are rationally arranged. The vibration of unit is small. 3 Feed scrubbers and blowdown scrubber 3.1 See Table 4-2 for technical parameters. Table 4-2 Stage-1 inlet scrubber Stage 2 Inlet scrubber Inside diameter mm 1000 800 Designed pressure MPaG 1.0 2.5 Designed temperature 93 93 Corrosion allowance mm 3.2 3.2 Treatment volume Factor K 0.09 0.07 Vessel category II II Shell materials 20R 20R Material for filter screen 0Cr18Ni9 0Cr18Ni9 Filtration precision m 3 3 Filtration efficiency 99% 99% Quantity 1 1 3.2 Technology Specification 3.2.1 Scrubber is of vertical separation filter, with stainless steel net skimmer inside. It embodies many separation and filtration methods, such as inertia, filtration, adsorption, and is high in separation efficiency and good in filtration result. After gas flows into the air receiver of scrubber, it rises upward, with big free liquid drop and solid particles dropping into the liquid connector at lower layer of scrubber. When gas is going through the dense stainless steel net, solid particles of small size are obstructed, and the small liquid drops accumulate in steel net and fall into the liquid

collector. This process makes the compressed gas effectively purified and thus ensures the safe and reliable operation of compressor. 3.2.2 Scrubber is equipped with liquidometer, automatic and manual blowdown apparatus and high-level shutdown and protective apparatus. If the liquid level of the scrubber is too high, automatic shutdown will be triggered so as to prevent liquid from entering the cylinder. 3.2.3 Exhaust air scrubbers are arranged behind the air cooler. 3.2.4 Blowdown main of scrubber is connected to skid edge. To prevent liquid in blowdown main from backflowing, check valves are equipped for all exhaust manifolds of scrubbers. 3.2.5 Design and Manufacture are in compliance with Steel Pressure Vessel GB150-1998. 4 Buffer tank 4.1 See Table 4-3 for technical parameters. Table 4-3 Stage-1 Intake Buffer tank Stage- 1 Exhaus t Buf fer tank Stage-1 I nt ake Buf fer tank Stage-1 Exhaust Buffer tank Designed pressure MPa 1,0 2.5 2.5 6.3 Designed temperature 93 177 93 177 Corrosion allowance mm 3,2 3,2 3,2 3,2 Vessel category Main materials 20R 20R 20R 20R Designed maximum oscillating peak 3% 3% 3% 3% Quantity 1 1 1 1 4.2 Technology specification To control the intensity of oscillating pressure of gas stream is very important. To stabilize the intake and exhaust air pressure, reduce oscillating of gas stream and interference of mechanical vibration of pipeline caused by oscillation of gas stream, buffering volume big enough is given at gas intake and gas vent of each cylinder, which separates the cylinder of compressor and pipeline, consumes the oscillating of gas stream and stables the operating pressure. The volum of buffur tank will be determined after receiving the piping gas flow pulsation analysis report. 5 Cooling system 5.1 Cooling system, which is used to cool process gas, add cooling water for engine and compressor, consists of mainly the air cooler and cooling pipeline. 5.2 The cooler is combined air cooler. Stage-1 and Stage-2 process coolant pipe tanks are integrated with the coolant tank. Fin pipe bundle is arranged horizontally. Fan for cooler, driven by electric motor, is of forced draft type, with angle of blades adjustable. Cooling pipe box for process air is equipped with manual blind window. The cooling air quantity can be adjusted to control the temperature of process air after cooling. 5.3 Separate skid is provided for air cooler, thus it can be installed at outdoor place. 6 Foundation 6.1 Foundation is constructed by welding profiled bars. Reinforced concrete for installation position of compressor is grouted, and between the bottom of compressor

and the concrete, there exists epoxy mortar with good rigidity, high intensity, so not susceptible to deformation. Reciprocating piston compressor is with inherent vibration. This foundation structure can effectively reduce the vibration of unit and facilitate installation. 6.2 Position adjusting bolts are arranged for engine, which can accurately adjust the alignment between the engine and compressor. 6.3 The base is also equipped with foundation bolts and adjusting bolts. With the help of adjusting bolts, the level of unit can be adjusted. Annex I: List of Special and General-purpose Tools for ZWF1250T ES604/2 Gas Compressor Unit S/N Description Drawing No Q’ty 1 ES604 kits 1 2 Lead-out sleeve for piston rod ES604 compressor 1 3 Special wrench for ES604 compressor cross head nut 1 4 Special tool for ES604 compressor piston nut 1 5 Spark plug wrench 475037 1 6 Spark plug separating tool 475006 1 7 Adjustable wrench of valve 494287 1 8 Inner hexagon wrench made in USA 1 9 Torque wrench 60-300Nm 1 10 Torque wrench 280-760Nm 1 11 Torque wrench 750-2000Nm 1 12 Combination wrench made in USA 1 13 Sleeves and extension rod made in USA 1 14 Adjustable wrench 150 1 15 Adjustable wrench 300 1 Annex II Spare Part List for Single Unit of ZWF 1250T ES604/2 Gas Compressor Unit for Start up Item Description P/N Unit QTY ES604 Compressor 1 Oil Filter Element 25Z-PS-2203 1 2 GASKET SEAT for 13.5”CYL 41-100078 4 3 GASKET SEAT for 13.5”CYL 44-100078 4 4 O-RING SEAL for 13.5”CYL 406-3301 8 5 O-RING COVER for 13.5”CYL 260-PS-2987 8 6 GASKET-SEAT for 19.5”CYL SS12-21076 6 7 GASKET-COVER 19.5"CYL A14-21007 6 8 GASKET-SEAT for 19.5” CYL SS4-21076 6 9 GASKET-COVER for 19.5” A7-21007 6 L7044GSI Engine 1 Oil filter Element 168660B 7 Consumable List 1 SHELL NGC Fluid 00l SAE40 L 100 2 SHELL VALUATA J406 L 80 3 SHELL 0480 SAE40 L 1000 4 SHELL GUARD FREEZN L 1300 成都展望能源机械有限公司 ZWF1250T-ES604/2 天然气压缩机组技术标 书 Annex III 2 Years’Spare Parts List ZWF1250T－ES604/2 Gas Compressor Unit Item Description P/N QTY Compressor

1 Oil filter Element 25Z-PS-2203 4 2 RINGGS&SPRINGS-TFE 10-PS-6058 16 3 RINGGS&SPRINGS-TFE 10-PS-4288 8 4 FLSEHEAD PACKING 10-PS-4338 8 5 RING PISTON 2071-100067 8 6 VALVE PLATE FOR 13.5"CYL 109-01-55141 16 7 CLOSING SPRING FOR 13.5”CYL 14-01-30262 256 8 WAFER SPRING for 13.5 CYL 111-01-55100 16 9 GASKET SEAT FOR 13.5”CYL 41-100078 8 10 GASKET SEAT FOR 13.5”CYL 44-100078 8 11 O-RING SEAL FOR 13.5”CYL 406-3301 16 12 O-RING COVER FOR 13.5”CYL 260-PS-2987 16 13 89 SERIES INLET VALVE ASSEMBLY FOR 13.5”CYL 1-01-55141 2 14 89 SERIES DISCHARGE VALVE ASSEMBLY FOR 13.5”CYL 1-01-55142 2 15 RING PISTONG FOR 19.5”CYL 2089-100000 8 16 VALVE PLATE FOR 19.5”CYL 109-01-60269 24 成都展望能源机械有限公司 ZWF1250T-ES604/2 天然气压缩机组技术标 书 17 CLOSING SPRING FOR 19.5”CYL 14-01-30262 480 18 WAFER SPRING PLATE FOR 19.5”CYL 111-01-603000 24 19 GASKET-SEAT FOR 19.5”CYL SS12-21076 12 20 GASKET-COVER FOR 19.5”CYL A14-21007 12 21 GASKET-SEAT FOR 19.5”CYL SS4-21076 12 22 GASKET-COVER FOR 19.5”CYL A7-21007 12 23 89 SERIES INLET VALVE ASSEMBLY FOR 19.5”CYL 1-01-60269 2 24 89 SERIES DISCHARGE VALVE ASSEMBLY FOR 19.5”CYL 1-01-20270 2 25 GASKET FOR 19.5”CYLV 1-029309 4 26 0-RING FOR 19.5”CYL 277-PS-2987 4 27 BEARING FOR 19.5”CYL 11-473852 4 28 BEARING FOR 19.5”CYL 11-473852 4 29 BUSHING FOR 19.5”CYL 11-103305 4 成都展望能源机械有限公司 ZWF1250T-ES604/2 天然气压缩机组技术标 书 2 Years’Spare Parts List ZWF1250T－ES604/2 Item Description P/N QTY L7044GSI Engine 1 Gasket, Valve Cover 153994C 24 2 Element, Lube Oil Filter 32" 168660B 14 3 O-Ring, Oil Bypass 168922M 2 4 O-Ring, Oil Filter Cover VHP16&AT 168922N 2 5 Gasket, Carb 119035 4

6 Belt,WP, Aux. A199868 2 7 Element, Air Cleaner 169180K 4 8 Element, Air Cleaner(Heavy Duty) 169180C 4 9 O-Ring,Lube Oil Strainer 493023 2 10 Seal, Lube Oil Strainer 493026 2 11 Gasket 493637 4 12 Diaphragm, Carb. 499222 4 13 Plug, Spark 60999Z 24 14 Extension, Spark Plug A211797G 24 17 Ignition Repair, VHP-12V IGN12 2 19 Kit, Repair Fisher 99 FUELREG2 2 Controlling system 1 Relay RXL2A12B2BD 3 2 Button XB2-BA31C 3 3 Indicator XB2-BVB4C 5 4 Fuse 5 成都展望能源机械有限公司 ZWF1250T-ES604/2 天然气压缩机组技术标书 Zhanwang Inc. Technical Bids of ZWF550T-ES604/1 Natural Gas Compressor Unit Performance Calculation for ZWF1250－ES604/2 Natural Gas Compressor 成都展望能源机械有限公司 ZWF1250T-ES604/2 天然气压缩机组技术标书 Zhanwang Inc. Technical Bids of ZWF550T-ES604/1 Natural Gas Compressor Unit __