買家頻道

首頁 | My Commerce

登入 | 加入會員 | 求助

寄送推薦信函

推薦信籃 (0)

買家頻道簡介

買家頻道

買家簡介

欲購買產品

Skid mounted gas terbine regulator

欲購買產品之描述

TECHNICAL DATA :

Technical Specification for skid mounted pressure regulating & metering station for Chittagong Urea Fertilizer Ltd. ( CUFL ), Rangadia, Chittagong.

TAG NO. : BGSL / PLANNING / BULK CMS / CUFL.

GAS FLOW RANGE : 05 TO 90 MMSCFD
Drawing No. : CUFL & DAP / RMS / SK / 06 / 01

Inlet Conditions :

Pressure Range : 350 Psig to 150 Psig.
Temperature Range : 50oF to 113o F
Molecular Weight of Gas : 17.30 to 17.11
Natural Gas Quality : Wet & Dirty, Specific Gravity 0.590 ( ± 1 % ).
Water Content : Less than 7 lbs / MMSCFD.
Filteration required : Down to 03 Microns.
Inlet Flange : 12" RF WN ANSI Class 300

Outlet Conditions :

Pressure Range : 130 Psig to 100 Psig.
Temperature Range : 60oF ( Min. )
Gas Quality : Dry & Cleaned to 03 Microns.
Outlet Flange : 14" RF WN ANSI Class 300

Quantity :

No of Stations : 01 ( One )

1.1 SCOPE OF WORK :

The bidder shall be responsible for the Design, Procurement, Fabrication, Testing, Packing, Delivery C & F Port Chittagong, Bangladesh, clearance from port & transportation to site, installation & necessary hookup with the existing nearby pipeline off-take, commissioning of the skid mounted customer metering station, Local training of BGSL Engineers. Existing CMS will be replaced Regulation. The Minimum scope of supply for the station is as follow :

- Duplex Filter with Separator.
- Straightening Vanes.
- Orifice meter sets ( For main runs )
- Turbine Gas Meter ( For low flow run)
- Pressure regulating sets.
- Associated slam shut valves, Transmitters, Recorders, Alarm indicating instruments, relief valve etc. as required as per typical drawing & Corresponding schedule of symbols.
- Associated piping & Valving.
- Special installation tools.

Technical Specification Page 25
- Commissioning spares as necessary.
- Standard Calibration Check equipment.
- Operation, Maintenance & Parts Manual for each individual Components ( Three set each ).

1.2 Equipment Parameters :

The Equipment shall include but not limited to that shown on typical regulating & metering station drawing. These items shall be in accordance with the following technical requirements.

1.2.1 Filter Separators (2 Nos. 90 MMSCFD each for CUFL & 02 Nos. 15 MMSCFD each for DAP).

The filter separators shall be fabricated steel / vessels to ASME 8 Div 1 and shall be designated for 30 barg and 50o C with a corrosion allowance of 3mm for all pressure parts.

Each unit shall be 100% Capacity and shall remove 99% of all liquids & solid ( dirty sludge ) above 3 microns size.

The unit shall include but not be limited to the following feature.

- All valves (Globe as per drawing where necessary).
- Quick easy opening & closure system.
- Internals.
- Removable filter elements.
- Under sludge Condensate collection tank with end flange for inspection.
- Level indicator gauge glass.
- Relief Valve.
- Vent.
- Manual discharge drain to facilitate condensate collecting to a Drum ( Drain valve should be globe type ).
- Differential pressure gauge & valves.
- Condensate storage tank with vents & drawing facilities having 2,000 ( Min.) liter capacity.

These units shall be of the Horizontal type with easy filter elements removable from base level. This unit shall be sized for 1.0 Bar clean & 3.0 Bar drop when maintenance is required.

1.2.2. Slam shut Valves ( 03 Nos. for CUFL & 02 Nos. for DAP i.e, Total 05 Nos.).

These shall be quick acting, impulse by signal down stream of the regulators. These should have manual override, and should be reset manually, with an integral-equalizing by-pass. SSV should be stable and vibration proof with supporting test result. Regulator with built-in S.S.V. is not acceptable.

Valve materials shall be identical to that of isolation valves as given below. All instruments for this equipment shall be housed in painted galvanized steel whether proof enclosure with adequate ventilation and space for easy maintenance.

1.2.3. Pressure Regulation Valves ( 06 Nos. for CUFL & 04 Nos. for DAP i.e, Total 10 Nos., 100% Capacity per stream. )

Pressure regulating valves shall act in one stage Monitor – Active mode. The units shall be of the pilot operated type using process gas only with an individual control loop for each regulator and an additional loop for the waiting monitor complete with selector pilot. The active & monitor regulator should be identical.

Technical Specification Page 26

Regulator should be controlled by pilot regulated gas. Regulator valve should have “ Online” maintenance facility. The main gas to be regulated should not be directly in contact with the main diaphragm of the regulator. They shall be well proven units capable of stable operation over the range of process conditions given in technical Data in section 1.0. The valve opening characteristics shall follow an “ equal percentage” type characteristic & sizing shall be carried out on the basis of 90 present valve open to cater maximum flow at minimum inlet pressure. At lockup, they should provide bubble tight seal. Valve bodies shall be cast steel and of flanged ends.

Valve trim shall be of the caged, low noise type or other wise suitable designed for low noise operation. Capacity data as well as performance characteristics lockup pressure must be included in the tender proposal. Regulator must be fail to open ( or Active - FTO & Monitor - FTC ).

Radiated noise from the regulator package shall not exceed 85 DBA at one meter. The detail calculation regarding suitability & appropriated ateness of size of the regulator must be provided.

1.2.4 Silencers ( 3 Nos. one in each stream for CUFL regulating run ).

Down stream of the regulator a silencer shall be supplied to limit the noise generated by pressure reduction to 85 DBA at one meter, under the worst-case process condition. Calculation must be provided with the tender to verify the effectiveness of the system proposed.

The silencer shall be designed to include a 03 mm corrosion allowance.

1.2.5 Relief Valve and Vents ( 3 Nos. Two for main & One for low flow run ).

These shall be of spring loaded self actuated or pilot operated type. Valve bodies shall be of cast steel with flanged ends.

The capacity of relief valve shall be 5% of the full stream flow under worst-case regulator fault conditions.

The scope of supply shall include vent pipe work with weather caps extending to at least 03 meters above ground level supported by steelwork integral with the skid. The size of the vent pipe work system should be adequate enough for pressure setting of the main regulators. For transportation a detachable system should be considered.

All instrumentation bleeds shall be discharged to an independent system. Arresters should be incorporated with the systems.

The relief valve system should be supplied in accordance with drawing vents for relief valves and manual vents shall include flat type weather protectors of antistatic design which shall be designed full closed after the end of gas discharge. For maintenance of the relief in running condition a manually operated ball valve with lockup system should be provided.

Technical Specification Page 27

1.2.6. Flow Meter Package ( 05 Nos. ; 02 for main run & 01 for low run of CUFL & 02 for DAP; 100% Capacity per stream ).

1.2.6.1 General :

The Regulating and Metering Station is aimed at installing for the purpose of supplying dry, clean, regulated natural gas and necessary the same for billing / fiscal purpose for the gas consumer. The principle of such measurement shall necessarily guide the design & use of meters to have the actual measurement of gas flow at different pressure & temperature conditions. The selection of meters shall be based on the guideline given in this document. The selected manufacturer of meters must have ISO-9001 Certificate and valid ISO-9001 Certificate must be included in the proposal.

1.2.6.2 The general arrangement of the custody transfer meter is shown on the P & I Drawing No. CUFL & DAP / CMS / SK / 06 / 01 duel chamber type orifice meter designated for the measurement of natural gas for fiscal purpose shall be used as the custody transfer meter. The bidder is to include a detailed write-up on the calibration techniques to ensure the confirmed accuracy of the meters and the bidder is also to supply as part of its bid any and all equipment necessary to carry out such tests ; the list of equipment along with the price should be provided separately.

1.2.6.3 The complete orifice meter run consists of the up and downstream meter tubes, flow straightener, orifice fittings, orifice, disc chart recorder and the necessary instrument piping.

1.2.6.4 The orifice meter shall be designed in accordance with AGA Report No. 3 ( Latest version ) and be based on the gas analysis provided in this document as well as information given in the relevant P & I Drawing. Beta ratio of the orifice metering must be within the limit of AGA Report No. 3 ( Latest Edition ). Percentage of uncertainty must not exceed the limits as listed in AGA-3. The orifice meter manufacturer must have ISO – 9001 Certificate and valid ISO – 9001 Certificate must be included in the proposal. Strength calculation shall be in accordance with the requirements of the ASME Guide for Gas Transmission and Distribution Piping Systems.

1.2.6.5 Meter tube shall be seamless carbon steel pipe having its inside diameter, tolerance and roughness shall be determined and recorded. Valves shall be within limits of AGA Report No. 3. The tube length shall be determined based on the actual piping layout chosen. For reducing the required straight pipe length upstream of the orifice a straightening vane shall be installed. The straightening vane shall be welded to a carrier plate with R.F. Flange facings on both sides. For keeping the straightening vane in place the carrier plate shall be clamped between the flanges. All parts of the flow straightener shall be joined by welding. The design shall allow for withdraw of the flow straightener from the meter tube. Care shall be taken to avoid flow induced vibration of the flow straightening vanes.

1.2.6.6 The Orifice Meter shall allow for exchange of the orifice plate without interrupting the flow through the meter run. This shall be of senior orifice fittings type integral by pass. The bores of the orifice plates shall be calculated by the bidder. The differential pressure across each orifice plate shall not exceed 500 m bar at maximum flow rate. The orifice run should be equipped with necessary spare orifice plate for approx. 25%, 50% and 75% capacity of each run complete with all flow computing equipment’s so that flow can be required factors. The bores of the orifice plates shall be calculated by the bidder / manufacturer. The orifice shall be made of stainless steel AISI 316. Orifice dimensions D and d, Orifice constant, Serial No. as shown in fig. 1 of AGA Report No. 3 shall be permanently marked at the circumference of the orifice and should try to match listed AGA– 3 figures instead of fraction for ease of calculation.

Technical Specification Page 28

1.2.6.7 Flow Computer with other accessories : ( 3 Nos. Two for main & One for low flow run ).

# It shall be capable of measuring natural gas flow (Sp. Gr. 0.570 – 0.60) as per last edition of AGA3 calculation for orifice metering. Using collected field data’s signal ( 4 – 20m A. ) from Transmitter ( Smart type ) and as per last edition of AGA7 or AGA8. All sensing pipe from orifice meter to transmitter must be size of 1/2"or above. All the instruments should be from reputed manufactures having accuracy ± 0.5% or better. flow calculation for Turbine metering using collected pulse signal from turbine meter and static pressure and Temp. from respective stream. For low flow run EVC can be installed.

# It shall have facility to display the followings in its display panel :

(a) Differential pressure, (b) Static / Absolute / Gauge pressure, (c) Temperature, (d) Flow rate, (e) Compressibility Factor, (f) Today’s cumulative flow, (g) Yesterday’s total Flow (h) Previous Month Total etc.

# It must have stored the above parameters for (a) Monthly report for billing purpose (b) Daily & hourly report ( Up to 35 days ), (c) Minute report ( Last 60 minutes ), (d) Min. / Max. report ( Last 24 hours ), (e) 200 – 250 alarm reports (f) Event reports etc.

# It shall have provision for (a) Low flow (b) High flow alarm (c) High pressure alarm (d) Modbus communication (e) Direct local link through built in operator interface port, (f) RS-232 / 485 for asynchronous serial communication (g) Dial up modem for communication over telephone network (h) Radio modem for wireless communication etc.

# Stored data shall be downloaded to Laptop / Host PC and shall be printed out through printer.

# It shall be housed in a weatherproof enclosure for hazardous locations that contains LCD readout and a covered Keypad and suitable for indoor or outdoor installation.

# One Laptop Computer ( IBM Compatible Latest Configuration ) should be offered without extra cost with tender.

1.2.7. Low Flow Metering Run ( for CUFL ),

A low flow run of following specifications shall also be provided.

Design Parameters :

Gas Flow Range : 01 – 10 MMSCFD
Inlet pressure range : 350 – 150 Psig.
Outlet pressure range : 130 – 100 Psig.
Inlet temperature range : 50oF to 113oF
Outlet temperature : 60oF ( Min.)
Molecular Weight of Gas : 17. 14 to 17. 11
Natural Gas quality : Wet & Dirty, Specific Gravity 0.590 ( ± 1% ).
Water content : Less than 7 lbs. / MMSCFD.

Other specifications for the low flow run should be as same as the scope of work in section 1.0 & instead of orifice meter, there should be turbine gas meter. Load limiting orifice should be incorporated with the meter to protect the meter from over run.

Technical Specification Page 29

1.2.7.1 FOR TURBINE GAS METER OF CUSTODY TRANSFER TYPE :

a) Body material : Cast Steel / Steel Alloy

b) Rangeability : 1: 20 or higher

c) Accuracy : i) Q min. – 0.2 Q max. = ± 1% or better
ii) 0.2 Q max. – Q max. = ± 0.5%
d) Base Condition : Flow at 4 oz/50 mm water column Absorption with built in
Straightening vanes.
e) Connection Type : RF Flange Type ANSI class 300.

f) Length : 3x DN (Nominal diameter).

g) Index : Direct reading index in cubic meter, as per OIML.

h) Seal : Index and other parts where necessary should be properly
sealed to make it temper proof.

i) Battery life : Minimum 05 years.( In case of EVC )

j) Lubrication system : Self lubricated type.

k) Flow capacity, connection size and base condition : as per requirement of the type of CMS.

l) Calibration Certificate is to be supplied with each meter.

1.2.8. Isolation Valves :

All isolation valve shall be full bore ball valve of ANSI Class 300. The valves shall be manufactured & supplied in accordance with API 6D and shall be selected from manufacturers who are listed as holders of the API monogram for ball valve manufacturer. Valve material should comply with the following.

Body : Cast steel A 216 WCB / Forged Steel ASTM A105
Ball : Stainless steel or cr. plated carbon steel / Forged Steel ASTM
A105 with 0.003" Electroless Nickel Plating.
Stem : Stainless Steel.
Seats : PTFE with Fire safe design ( ASTM )
Seals : PTFE / Asbestos with Fire safe.
Operation : 6" NB & below – lever operated, 8" NB & above-gear operated.

Valve manufacturer’s API Certificate must be enclosed with the tender.

1.2.9. Pipe work & fittings :

Line pipe used in the construction of the station shall be manufactured & supplied in accordance with API 5L Gr.B and shall be selected from certified API manufacturers. The minimum thickness shall be Sch. – 40 for over 2" dia. & Sch. – 80 for 2" dia. & less. Actual wall thickness shall be selected according to design pressure & shall include a 3 mm corrosion allowance.

1.2.10. Insulating Joints :

These shall be of the weld end monoblock type. Insulation kits flanges are not acceptable.

Technical Specification Page 30

1.2.11. Bends, Tees & Flanged Fittings :

These shall comply with ANSI B 16.9 & shall be manufactured from 234 grade WPB materials.

1.2.12 Flanges :

These shall comply with ANSI B 16.5 shall be manufactured from ASTM A 105 materials. Class 300 shall be used.

1.2.13. Gaskets :

These shall comply with ANSI B 16.21 & shall be stainless steel spiral wound, carbon asbestors filler with carbon steel centering ring.

1.2.14. Stud Bolts & Nuts :

These shall comply with the following :
Bolts : ASTM 193 Gr. B 7 Cd Plated.
Nuts : ASTM 194 Gr. 2 H Cd plated.

1.2.15. Tubings & Compression fittings :

Valves, tubings and compression fittings to be used for different sensing line should be of stainless steel. Compression fittings should of Inch size NPT.

1.2.16. Pipe Joints :

For 2" dia & above flanged joints shall be used with proper pressure rating.

4.2.17. Pressure Gauges :

All the pressure gauges that will be used in the CMS should be liquid filled & the dial size would be minimum 6" size.

1.2.18. Control Panel :

The panel which will be situated in the nearby operator room should be a painted galvanized steel, instrument panel fully weather proof. All electrical instrument should be intrinsically safe.

The unit shall include but not be limited to the following items :

- Station inlet pressure indicator (Digital).
- Station Outlet pressure indicator (Digital).
- Flow computer for displaying instantaneous flow rate, hourly, daily & monthly total flow rate, differential pressure, temperature & static pressure.
- Alarm ( Electropneumatic ).
- Alarm Mute button.

Alarm shall include but not be limited to the following items :

- Outlet Gas - Pressure high
- Outlet Gas - Pressure Low
- Inlet Gas - Pressure Low

Technical Specification Page 31

1.2.19. Calibration Equipment & Special installation tools :

Following calibration tool box should be offered without extra cost with the tender :

a) Hand held data communicator for calibration of electronic portion of DP, PT & TT.
b) Calibration box (Pneumatic) for calibration of Pneumatic portion transmitters like DP, PT & TT (Calibrator for DPT, Dead Weight Tester for Static Pressure & Resistance box for RTD).
c) Calibration equipment for calibration of temperature transmitters.
d) Users manual for the operation of the mentioned equipment.

1.2.20. Power supply for the control room :

Power source at 220 volts AC, 50 Hz. would be available at the control room. Bidder should supply internal battery back up offering minimum 30 days operation of the electronic computer in case of power failure.

1.3 Others :

List of all components with Model, Type, size, pressure rating, Manufacturer’s Name & Country of Origin to be provided with bid.

1.4 Approval of P & ID :

Successful bidder must submit PFD, P & ID for approval by the company before the fabrication of CMS.

1.5 Gas Analysis

Component Mole Percent ( 2 Stream Mixing )

Methane 94.15 - 93.97
Ethane 02.91 - 02.89
Propane 00.81 - 00.75
ISO – Butane 00.24 - 00.23
Normal – Butane 00.14 - 00.11
ISO – Pantene 00.04 - 00.07
Normal – Pantene 00.02 - 00.03
Neo – Pantene Trace
Cyclo – Pantene 00.01
Hexane Plus 00.21
Nitrogen 00.32 - 00.26
Carbon di-Oxide 00.45 - 00.43
Water 01.06 - 00.90
Hydrogen Sulphide No. Trace
Specific Value 0.600 - 0.570
Calorific Value 1050.30 - 1036.45 Btu / Ft3
Molecular Weight 17.14 - 17.11
Free Hydrocarbon Liquid Apporx. - 2.00 US.
Content Gallons per MMSCF
Possible Conditions Slugging may occur

Technical Specification Page 32

1.6 Information to be supplied with tenders :

The supplier shall provide at the time of tendering a complete detailed engineering package in accordance with the requirement herein and shall include but not necessary be limited to :
a) Process Flow Diagram ( PFD ) covering the process showing flows, temperatures and pressures.

b) Piping and Instrument Diagram ( P & ID ) for the complete system.
c) Equipment layout and general arrangement drawings.
d) Proposed Schedule of work ( Bar Chart ).
e) Operation procedure manual including : Commissioning, Start up, Shut down and Fault analysis of system.
f) Equipment data sheets for all equipment on the P & ID’S together with instrumentation details with specific Brand names, model and sizes.
g) Total lump sum price for the supply of spare parts (detailed list with unit prices ) for two (2) years operation.
h) Detail calculations for process flow equipment design, mechanical and piping design and instrument design.
i) A detailed description of the Goods essential technical and performance characteristic. The Bidder shall be specific in describing its Goods. Reference to such works as “ typical ” or “ equivalent ” will not be acceptable.

公司介紹

**********

公司基本資料

公司名稱:	**********
聯絡人:	Momin Ahmed
Email:	加入推薦信籃
電話:	**********
傳真:	**********
國家:	Bangladesh