GAIL (India) Limited

Transcription

1 GAIL (India) Limited (A Govt. of India Undertaking) CHAINSA-JHAJJAR-BAMNOULI PIPELINE PROJECT BID DOCUMENT FOR USM AND METERING SKID CORRIGENDUM 1 (BID DOCUMENT NO.: 11/0230/JPK/GAIL/07-R0) LIMITED INTERNATIONAL COMPETITIVE BIDDING Issued by

2 GAIL (India) Limited CHAINSA JHAJJAR PIPELINE PROJECT CORRIGENDUM A CORRIGENDUM 1 PS AKA PKS REV. DATE DESCRIPTION PREP CHKD APPD 1

3 Document Name: Volume I of II COMMERCIAL S.No. Page No. No. Section Subject Addition/Deletion/ Modification IFB A (vi) & B (iii) ITB C (Indian Bidder - v & Foreign Bidder - vi) ITB Bid Document No. Evaluation and Comparison of Bids Evaluation and Comparison of Bids E Tender No. Shall be read as Fifteen (15) shall be read as Twenty (20) Fifteen (15) shall be read as Twenty (20) Document Name: Volume II of II TECHNICAL Document Number: Rev. B Stamped Page no Description of Equipment and/or Services ITEM NO. DESCRIPTION QTY 1 LOCATION: DISPATCH STATION AT CHAINSA 3 Nos. of Ultrasonic Gas Flow Meter with upstream & downstream meter runs. Minimum straight lengths and profiler with 10 D US of Profiler + Profiler + 10 D DS of Profiler + meter + 5 D DS of Meter shall be supplied by Bidder (Bidder to use straight lengths + profiler during wet Calibration). Bidder to wet the GAD s/ Piping Details developed by contractor and suggest final upstream/downstream straight length distances. Wet Flow Calibration from accredited flow labs. 1 No. Gas Chromatograph with accessories, tubes, fittings, regulators, valves etc, calibration gas cylinders, Carrier gas cylinders and GSM Modem for remote monitoring as per Technical spec. Supply/Testing of Metering Panel including wiring and fitting of all instruments and accessories including Flow Computer(3 Nos), GC Controller/Display Unit along with Printer, isolators, barriers, repeaters, power supply units, lamps, relays, annunciator etc Pressure & Temperature Transmitters with Thermowell. Interconnecting Special Cables between Flow meter and Metering Control Panel. RS 485 Cable from meters in field to flow computers in control room to be supplied by Bidder. 1 lot CORRIGENDUM I BID DOCUMENT NO. 11/0230/JPK/GAIL/07-R0 REV A SHEET 2 OF 5 2

4 Special Cable (such as RS 485 or any special cable) between GC Field Unit/GC controller and Display Unit in control room to be supplied by Bidder. Serial Interface Cable (such as RS 485/ RS 232 cable) from Flow Computer and GC Display unit to RTU to be supplied by Bidder. Supply of 1 No. Laptop loaded with FC software and GC software for necessary configuration downloading data for FC/GC as and when required along with portable printer, along with suitable cable between Meter/ Gas chromatograph and laptop in safe area/control Room. Tentative distance between field and control room can be taken as 100 meters. Mandatory Spares as per Appendix 8 of Package Unit Instrumentation Supervision of Erection, Testing And Commissioning by Bidder for 20 days. Bidder to quote per diem rates, inclusive of all expenses like travel, boarding, lodging etc. 2 LOCATION: BAMNOULLI TOP (SV- 4) Description of Equipment and/or Services remains unchanged Mandatory Spares as per Appendix 8 of Package Unit Instrumentation Supervision of Erection, Testing And Commissioning by Bidder for 20 days. Bidder to quote per diem rates, inclusive of all expenses like travel, boarding, lodging etc. Document Number: Rev. B Stamped Page No SCOPE OF WORK 3.2 ii) Self Actuated pressure Control Valve (Monitor), FCV and SSV separately as indicated in the P&ID. 3.3 The skid shall be complete in all respects, ready for installation and commissioning at the respective site. There shall be minimum work to be done at site. All field mounted instruments shall be supplied loose to avoid damages of same during transportation of the skid. However, PCV, FCV, Slam Shut, Ultrasonic flow meter, and flow Profiler shall be duly mounted on the skid. The flow computer shall be fully configured and all the necessary data as per data sheet should be recorded in FC to minimise site work. The details regarding installation of metering skid, shall be clearly described in the Installation Manual especially made for metering skid installation and the same shall be submitted while despatching skids to various sites. Stamped Page No Flow profiler shall be provided at the ultrasonic meter inlet to eliminate swirls and cross current setup by the pipe fittings, valves or regulators preceding the meter inlet piping where specified. Flow Profiler shall be according to AGA Report No. 8 & 9. Flow Profiler shall be of suitable design to meet tender CORRIGENDUM I BID DOCUMENT NO. 11/0230/JPK/GAIL/07-R0 REV A SHEET 3 OF 5 3

5 specification. Bidder shall furnish complete details/design of straight length (upstream/downstream) arrived at. Document Number: Rev. B Stamped Page No Each metering stream shall at least include the following equipment: One Pneumatic (Gas over oil Actuated)/manual, inlet double block and bleed integrated isolation valve, (with open/close proximity switches and solenoid valve for remote operation). This valve shall be equipped with a by-pass for line pressurisation. This by-pass shall be composed of one isolation valve and one manually operated globe or plug valve. The CONTRACTOR shall specify the valve stroke time required to avoid unacceptable acceleration torsion in the ultrasonic meters. (Refer P&ID for Metering Skid at Chainsa and Bamnoulli.) Other descriptions remains unchanged. Document Number: Stamped Page No DESCRIPTION OF THE GAS PRESSURE LETDOWN SKID Process data for the gas pressure letdown skid are given in the Process Design Basis. The gas pressure letdown skid shall include the necessary equipment to perform safely the operation for which it is designed. It shall be equipped with, but not limited to (see also the relevant P&ID): One process connection at inlet (600 # according piping classes). Two process connection at outlet (600 # according piping classes). Other descriptions remains unchanged. Document Number: Rev. B Stamped Page No The turndown ratio of each flow meter shall be minimum 1:40. The accuracy of the Ultrasonic flow meter shall be ± 0.3 %(including Lab uncertainty) or better and repeatability shall be better than ±0.1% of reading and accordingly Bidder shall select the no. of paths to meet accuracy requirement and indicate the same in calculations/back-up literature. Other descriptions remains unchanged. Stamped Page No INSPECTION AND TESTING The Ultrasonic meters shall be flow calibrated with natural gas and shall have calibration certificate duly signed by weights and measures authority such as NMI, PTB or other reputed National Standard laboratory of its country of origin such as Trans Canada Calibrations, (TCC) Canada,Colorado Engineering Experiment Station Inc.(CEESI) USA,South West Research Inc. (SWRI) USA. Accuracy with CORRIGENDUM I BID DOCUMENT NO. 11/0230/JPK/GAIL/07-R0 REV A SHEET 4 OF 5 4

6 wet flow calibration shall be demonstrated within ±0.3% for multi path type under flow conditions in the turndown ratio of 1:40. The meter proving system to be used by Bidder shall be traceable to international standards and uncertainty of meter proving system shall be furnished. Gas metering system integration, testing, validation and including third party "wet' calibrations (only for the ultrasonic meters with its associated upstream / downstream meter runs) should be done in flow labs as detailed above Other descriptions remains unchanged. Document Number: Stamped Page No. 273 & 274 PAINTING TABLE DELETED LIST OF ATTACHMENTS S.No. Description Document No. 1. Replies to Bidders Queries N.A. 2. Data Sheet Ball Valve Rev B 3. Piping Material Specification Rev C 4. Data Sheet For Dry Gas Filter Rev A 5. Data Sheet For Slam Shut Valve Rev C (sheet 10 0f 15) 6. Data Sheet For Flow Control Valve Rev A 7. Data Sheet For Pressure Control Valve Rev A 8. Mandatory Spares Rev C (Appendix 8) 9. Creep Relief Valve Rev A 10. P & IDs D Rev 1 (sheet 3 of 3); S Rev 5 (sheet 1,2 of 5); S Rev 1 (sheet 3,4,5 of 5). CORRIGENDUM I BID DOCUMENT NO. 11/0230/JPK/GAIL/07-R0 REV A SHEET 5 OF 5 5

7 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM 1 TECHNICAL DATE: Sr. No Section / No. Scope of supply 1.2 Scope of supply Job Specifica tion for Filtration, Metering and Let down. Point No Scope of supply Job Specifica tion for Filtration, Metering and Let down. Point No Ultrasoni c Flow Meter, Sheet 5 of 13 Tender Doc. Page No. Sheet 3 of 14, Page no. 7 Page no. 32, Sheet 8 of 11 Page no. 32, Sheet 8 of 11 Page 87 Description Bidder s Query Reply/Clarifications Loose supply of three number (3) Flow computers, GC controller/display Unit along with printer, Isolators, barriers and repeaters, power supply units etc required for the system. Flow profiler shall be provided at the ultrasonic meter inlet to eliminate swirls and cross current setup by the pipe fittings, valves or regulators preceding the meter inlet piping where specified. Flow Profiler shall be according to AGA Report No. 8 & 9. Flow Profiler shall be a bundle of SS 316 tubes. Vendor shall Furnish complete details/design of straight length (upstream/ downstream) arrived at. Ultrasonic meters shall undergo wet test calibration to accuracy equal to or better than +0.3%. The meter Shall have rangeability of 1:40 for the accuracy mentioned over the entire range. The accuracy of the Ultrasonic flow meter shall be ±0.25% or better & repeatability shall be better than ±0.25% of reading and acc. vendor shall select the no. of We recommend the supply of Flow Computers along with accessories in a control panel and not loose. Please confirm. As per the detail provided in Sheet 6 of 12, Page 51 USM based Metering skid, you have asked for a flow profiler as in between flanges type. This is contradictory to the tender clause on Point No. 3.39, Page no. 32, Sheet 8 of 11. Please confirm the type of flow profiler required. As per the detail provided in Sheet 5 of 13, Page 87, Ultrasonic Flow Meter, rangeability required in USM is 1:20. We understand that the rangeability required is 1:40. Please confirm The accuracy requirement for Ultrasonic meter in all the GAIL tenders is 0.1% and inclusive of lab inaccuracy it is 0.3%. We understand the same is required in this tender also. Vendor to supply metering Panel along with Flow computer, Gas Chromatograph Controller/ display unit with all accessories mounted, completely wired and tested. (Refer Corrigendum 1) Stamped page 2 SS Tube Bundle is to be deleted. Flow Profiler design to meet tender specs to be supplied. (Refer Corrigendum 1) Stamped page 3 Accuracy shall be + 0.3% (including Lab uncertainty), Repeatability shall be + 0.1%, and Rangeability 1:40 Refer S.No. 3 Page 1 of 23 6

8 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM Ultrasoni c Flow Meter, Sheet 5 of 13 Ultrasoni c Flow Meter, Sheet 5 of 13 datashee t of Control Valves P&ID's Page 87 Page 87 Sheet 1 of 2, Page 239 paths to meet accuracy requirement and indicate the same in calculations/ back-up literature. The accuracy of the Ultrasonic flow meter shall be ±0.25% or better and repeatability shall be better than ±0.25% of reading & accordingly vendor shall select the no. of paths to meet accuracy requirement and indicate the same in calculations/back-up literature. The flow metering system shall consist of Multipath Transit time Ultrasonic flow meters. Details in the datasheet are missing Note 2. All the MOV's above 12"shall be manually operated and hydraulically actuated type The repeatability requirement for this tender is 0.25%. For USM, the repeatability requirement should be more stringent than the accuracy requirement and we suggest the repeatability requirement should be as 0.1% minimum while as most of the reputed manufacturers repeatability is 0.05% of the reading. We highly recommend the use of USM with minimum 4- path. The use of 2-path meter would jeopardise the reliability of the metering system which is cash register for GAIL. Ultimately it s the decision of the customer about the minimum path requirement for USM. But one should keep in mind that the popularity of USM in GAIL is due to the fact that the installed USM meters performance at GAIL is exceeding expectations and all the USM in critical service are 4-path meters only. 1. Please provide the detailed data sheet for flow control valve. 2. Please provide the working philosophy of the same. As per our previous experience, valves below 16" along with pressure balancing system can easily be operated manually. Hydraulic actuation is not necessary for valves below 16". It will unnecessary increase the cost. Kindly confirm the requirement of hydraulic actuator. Accuracy shall be + 0.3% (including Lab uncertainty). Repeatability shall be + 0.1%. Tender Condition prevails. 1. Refer Corrigendum 1 Stamped page 35 to Refer S.No. 19 Refer Corrigendum 1 Stamped page 29 to 30 9 Datashee t of Filter 10 Datashee Filter datasheet is not in the tender. Kindly provide. Kindly provide the velocity limit within the filter vessel. Page 2 of 23 Refer Corrigendum 1 Stamped page 32 to 33 velocity limit within the filter vessel is 2.5 m/sec 7

9 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM t of Filter As per normal industrial practice, velocity inside the filter vessel is limited to 2.5 m/s. Kindly confirm if the same is applicable for this tender. Filter P&ID for Filtration skid specificat ion of Filtration skid Sheet 5 of 10, Page 40 Sheet 5 of 10, Page no. 40 Sheet 5 of 12. page 50 The Quick opening closure shall be equipped with locking device which can be opened only when the vessel is completely depressurized. Alternatively, swing bolts with pin arrangement shall be provided for the closure, if specified in the data sheet. The swing bolts shall be of one piece construction without welding. Hinge pins shall be forged and of the same material as the swing bolts. Typically, the filter is provided with level gauge & transmitter, Manometer & D P transmitter, vent valves (2 manual valves in series, one block valve and one throttling valve) and drain valves (2 manual valves in series, one block valve and one throttling valve). One pneumatically actuated/manual, inlet double block and bleed integrated isolation valve, (with open/close proximity switches & solenoid valve for remote Since both QOC and option of Swing bolt is given in the tender, we recommend to use QOC in place of swing bolt arrangement. Please confirm only QOC is acceptable as per vendor list. Please provide the DP for both clean and dirty condition. We understand that the inlet valve of 16" 600 class should be fitted with Gas Over Oil Actuator (GOOA). Please confirm if our understanding is correct and provide the specifications for GOOA. We understand that Manometer and Level Transmitter is not required. Kindly confirm. Please confirm if we have to provide pneumatically actuated or manual Double Block and Bleed Valve. Page 3 of 23 Only QOEC shall be considered for Filter Vessel closure. DP Clean bar DP Dirty bar Bidder s Understanding is correct. However Valve size is revised to 12. Bidder s Understanding is correct Refer Metering P&ID of Chainsa and Bamnoulli. Stamped page 42 & 46 8

10 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM 1 16 Scope of supply 1.2 Descripti on of equipme nt and or services Location: Dispatch station at Chainsa Sheet 3 of 14, Page no. 7 operation). This valve shall be equipped with a by-pass for line pressurization. This by-pass shall be composed of one isolation valve and one manually operated globe or plug valve. Special Cable (such as RS 485 or any special cable) between GC Field Unit/GC controller and Display Unit in control room to be supplied by metering Vendor. There is no special cable required for our system. However, kindly confirm the scope of supply for the special cable. All Cables to be provided by metering Vendor, including field to Control Room Cables Scope of supply 1.2 Descripti on of equipme nt and or services Location: Dispatch station at Chainsa Ultrasoni c Flow Meter Sheet 3 of 14, Page no. 8 Sheet 9 of 13, Page 91 Supply of all cables, trays, junction boxes, impulse tubing, valves, manifolds within the skid, and all cables from field instruments/ meters/ Gas Chromatograph to control room Meter electronics shall be capable of multiple output signals as follows: a) Frequency pulse output to flow computers configurable for flow rate signals. b) One configurable 4-20 ma analogue output internally powered and galvanically isolated. c) Digital discrete outputs for direction of flow, trouble alarm and output data validation. d) RS-485/422 communication port with MODBUS protocol for Please confirm if all the cables between field and control room are in our scope of supply As USM already has a pulse O/P and Modbus O/P denoting the flow, there is no requirement for 4-20 ma analog O/P. The same is also not mentioned in your data sheet. Kindly confirm your acceptance. Page 4 of 23 Yes. All Cables shall be provided by metering Vendor, including field to Control Room. Vendor to furnish: 1. One RS 485/RS 422 Modbus RTU output. 2. Frequency Pulse output 3. Digital output to show various alarms as mentioned. 9

11 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM Flow Compute r Point no Point no. 6.9 Sheet 10 of 10, Page 105 Sheet 6 of 12, Page no. 51 Sheet 8 of 9, Page no. 113 communicating with the other control system i.e. control room mounted flow computer for meter diagnostics, test and health data. PID control shall be implemented in flow computer. Also independent microprocessor based PID controller shall be supplied. User will select implementation of PID control in flow computer or independent controller. Ultrasonic Gas Check/Custody Transfer Metering System shall be built and integrated only by the original equipment manufacturer of the Ultrasonic Flow Meter, since critical components within the custody transfer metering system should be compatible to ensure Overall System Uncertainty for this critical fiscal transaction purpose. All components within the metering system must be well proven and compatible in the similar application. The vendor shall supply two each prefilled calibration gas cylinders (one for rich and other for semi rich gas) with regulator mechanism. A recognized laboratory must certify the calibration gas. The calibration gas specification must be approved by the purchaser prior to purchase. The calibration gas shall The P&ID control can be incorporated in the flow computer and no separate P&ID controller is required for the same. Kindly confirm. We understand that the authorised agents who quote on behalf of their principals and are using PTR of the principals, they should build, integrate, test (FAT) the system at the principals place to ensure the integrity and reliability of the system. The consumption for calibration gas for GC is very less hence we request you to accept one number of 0.5 m3 capacity cylinders in place of 2.13 m3 calibration gas cylinders. Kindly confirm your acceptance. Page 5 of 23 Yes, Independent PID Controller is required; however the same shall be implemented in Flow Computer also. Normally FCV will be acting as a Active Regulator and will be controlled by Pressure. In the event of flow exceeding preset value the flow controller will override Pressure controller Tender Condition prevails. Tender Conditions prevails 10

12 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM 1 22 datashee t for USM Sheet 1 of 15, Page no. 221 have a minimum certification accuracy of ±0.2% for components (mole%) greater than 10 % and ±0.5 % for components (mole%) between 1 % to 10% and ±1.0% for components (mole%) below 1%. The calibration shall be traceable to NPL or equivalent (the traceability certificate to be submitted) with 03 years stability. Mixer category shall be PRIMARY. Gas volume per cylinder is approx m3. Material Construction of We understand that the requirement is of low temperature cast steel material. Since the Casting material is having a better physical property with reference to pipe material. Tender Conditions prevails 23 datashee t for Pressure Transmitt er Sheet 3 of 15, Page no. 223 Accuracy 0.04% of Span We understand that the accuracy of 0.04% is only required for metering system and all other PT's will be acceptable for 0.075% accuracy. Please confirm The accuracy of PT installed with USM meter for Custody metering purpose shall be with % accuracy. All other PT s will be acceptable with % accuracy. 24 datashee t for Pressure Relief Valve 7 of 15, Page no. 227 Body and bonnet material mentioned as A 351CF8M We understand that A352 LCB/LCC material should be acceptable in place of A 351CF 8M. Kindly confirm. Tender Conditions prevails datashee t for Creep Relief valve datashee t for SSV and Regulato Datasheet of Creep Relief valve is not available Datasheet of SSV and Regulator are incomplete Please arrange for the same. Please provide the MOC for both. Refer Corrigendum 1 Stamped page 40 & 41 Refer Corrigendum 1 Stamped page 34 Page 6 of 23 11

13 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM r Mandator y Spares Datashee t for Ball Valves & Globe Valves P&ID for Metering skid Sheet 1of 1, Page no. 241 Page no. 249 and SOR Mandays Section 1 of IFB, 3.1 Section I of IFB, 3.3 General Querry E Tender No. Page 6 of 7 Page 7 of 7 Datasheet for valves For Z configuration 3.1 Bid Evaluation Criteria Documents required: Satisfactory work performance cert. for at least 6 months from the end user for item no. 1 & 2 Two Numbers Pilot for FCV has been mentioned, but there is no pilot for FCV. We request you to delete the same. We understand that valve upto 4" size will be provided with wrench operated type, from 6" to 14" Gear operated type and 16" & above HOV or XOV type. Kindly confirm if our understanding is correct. We request you to kindly add Limit switches in the valves for Z configuration enabling the user to see the position in the control room. As per the SOR, we have to provided a lump sum value for supervision of erection, commissioning activity. As the erection is not in Bidders scope, we suggest to make these charges on Mandays basis in place of Lumpsum. 1. Requesting GAIL/JP Kenny to amend this clause as at least one number of supply reference instead of two numbers to establish the PTR. 2. End users will not issue performance letter, hence requesting GAIL/JP Kenny to accept installation/ commissioning report date to establish six months operation of the meter/skid. End User of the Ultrasonic meter/skids does not issue the performance letter as the vendor may use it for their marketing purposes. In this situation, we request GAIL / JP Kenny to waive this condition. Installation report or supply details/po Copies will be produced to establish the supply/ptr. Kindly accept the same. Whether Indian Bidder can quote in Indian rupees based on Global PTR available for Ultrasonic Meters and skids E-Tender Please confirm which one is appearing Correct E-Tender No. Page 7 of 23 Refer Corrigendum I Stamped page 39 Refer Corrigendum I Stamped page 29 to 30 Yes Vendor to provide limit Switches(open/close) for Z configuration Valves and wire them to panel for indication Evaluation shall be made on 20 days. Per diem rate shall be quoted for 20 days, payment shall be made on actual number of days spent. Tender Conditions prevails Tender conditions prevails Indian Bidder can quote in INR. Refer Corregendum I Stamped page 2 12

14 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM 1 35 S No 172 to of USM specification MR for USM and Metering Skid Page 13 of 14 Page 5 of 13 and Page 1 of 15 Page 5 of 13 in the bid document 1. Tender Doc IFB mentioned: List of recommended vendors for Gas Chromatograph given in tender are 4 Nos only namely DANIEL, RMG, Instromet and ABB. Specification for Ultrasonic Flow Meter, and Data Sheet of US Meter, Meter body shall be made of carbon steel as per data sheets. As per USM data sheets body material of US Meter required is low temperature carbon steel. Specification Ultrasonic Meter, for Flow The accuracy of the US flow Meter shall be +/-0.25% and accordingly the vendor shall select the no. of paths to meet the accuracy requirement and indicate the same in calculations/back up literature Out of this list, 3 vendors namely Daniel, Instromet and RMG are our direct competitors for US meter/metering skid and do not quote to us. Hence we are left with only 1 vendor namely ABB to source/ get offer for GC. We strongly request you to include SIEMENS name in the GC list. Siemens GC model SITRANS is approved by PTB for natural gas online GC for custody transfer applications. We are attaching PTB certificate and reference list of supplies in support of same We strongly feel low temperature cerbon steel is not required for GAIL's process/ambient conditions. In very recent tender GAIL thru EIL has gone in for ASTM A 216 Gr WCB as the body material. We request you to accept the same. Attached is the extract of the tender specification indicating body material as ASTM A 216 Gr WCB. The same is suitable for Natural gas applications and for GAIL's filed requirements. Please clarify that the accuracy requirement of +/- 0.25% is the overall accuracy including the lab uncertainty or is it the uncertainty of the US Meter alone. Please note that from past field experience, to achieve an overall uncertainty of 0.25% or better, the UFM should have minimum 4 paths (4 sets of transducers). If a meter has a total uncertainty of 0.25% in lab calibration, this will translate to a total uncertainty of greater than 0.3% under operating in situ field conditions. This statement is in line with AGA 9 latest clause 9.1, S No 2 on Page 8 of 23 Tender conditions prevails Tender conditions prevails Accuracy shall be + 0.3% (including Lab uncertainty). Repeatability shall be + 0.1%. Other specifications as per Tender requirement. 13

15 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM 1 38 Note No Page 1 of 15 Page 5 of 13 Page 6 of 12 Data Sheet of US Meter, Doc No Number of paths to be decided by manufacturer to meet overall specified accuracy requirements as per AGA 9 guidelines. Specification for Ultrasonic Flow Meter, (Doc No ) All flanges shall be weld neck, raised face and shall meet ANSI B 16.5 Specification for USM based Metering Skid, (Doc No ) Ultrasonic meters with a minimum length of 10D upstream + profiler + 10 upstream + meter + 5D downstream meter run shall be supplied. page 32 and clause 9.3. Moreover as per tender the loss of one path should not degrade the accuracy of measurement of the US Meter by more than +/0.1%. This is practically achievable only when the number of paths is 3 or more so that during loss of one path, you have minimum 2 working paths all the time. In view of all the above we request you to reconsider the minimum paths required for highly accurate custody transfer /reconciliation US Meter for a long accurate performance. As per latest AGA 9 guidelines (April 2007) the accuracy requirements for large meters (>12") is +/- 0.7% and for small meters (<12", it is +/- 1%). ( No and 5.1.2, page 17 & 18 of AGA)Please clarify which accuracy requirements are to be followed while deciding number of paths of the US Meter to be offered. There are cases in which the full meter body including the flanges is a single casting. In such cases, it is not possible to offer weld neck flanges. Kindly confirm your acceptance. Please note that SICK Maihak Gas Ultrasonic Meter is approved for custody transfer of Natural Gas with 5D upstream meter run, PTB approved profiler plate and 3D downstream meter run. This configuration has been approved by PIGSAR, PTB which is reputed lab approved by German Weights and Measures. Attached is the relevant page of the type approval certificate to this effect Pls refer configuration No 2 given on 3rd page in the attached file. We request you to accept the same for best performance results as Page 9 of 23 Accuracy shall be + 0.3% (including Lab uncertainty) If the meter and flange are casted as a single piece, requirement of Weld neck Flanges may be deferred. Tender Conditions prevails 14

16 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM 1 individual case of SICK Maihak Meters Page 4 of 4 Section III B, SCC- Goods, Delivery Schedule The FOT site schedule is 7 months Since scope involves wet calibration of big size meters and supply of GC, we request you to review the delivery period and make it 8 months FOT site. Pls confirm Tender Conditions prevails MR for USM & Metering Skid Page 3 of 14 Loose supply of three number (3) Flow computers, GC controller / Display Unit along with printer, Isolators, barriers & repeaters, power supply units etc required for the system. Refer S.No (ii) 3.3 Job Spec for filtration, metering & let down Page 5 of 11 Job Spec for filtration, metering & let down Page 6 of 11 Two self actuated pressure control valve(s) with integral slam shut as indicated in respective P & ID s. The skid shall be complete in all respects, ready for installation and commissioning at the respective site. There shall be minimum work to be done at site. All field mounted instruments shall be supplied loose to avoid damages of same during transportation of the skid. However, PCVs with integral slam shut, ultrasonic flow meter, flow straightner, control valve shall be duly mounted on the skid. The flow computer shall be fully configured and all the necessary data as per data sheet should be recorded in FC to minimize site work. The details regarding Page 10 of 23 Self actuated Pressure control Valve(monitor), FCV and SSV separately as indicated in respective P & ID s. Refer Corrigendum 1 Stamped page No. 3 15

17 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM 1 installation of metering skid, shall be clearly described in the Installation Manual especially made for metering skid installation and the same shall be submitted while dispatching skids to various sites Job Spec for filtration, metering & let down Page 8 of 11 Flow profiler shall be provided at the ultrasonic meter inlet to eliminate swirls and cross current setup by the pipe fittings, valves or regulators preceding the meter inlet piping where specified. Flow Profiler shall be according to AGA Report No. 8 & 9. Flow Profiler shall be a bundle of SS 316 tubes. Vendor shall furnish complete details/design of straight length (upstream/downstrea m) arrived at. Flow profiler shall be provided at the ultrasonic meter inlet to eliminate swirls and cross current setup by the pipe fittings, valves or regulators preceding the meter inlet piping where specified. Flow Profiler shall be according to AGA Report No. 8 & 9. Flow Profiler of suitable design to meet tender specifications. Vendor shall furnish complete details/design of straight length (upstream/downstream) arrived at Ultrasoni c flow meter Page 5 of 13 The turndown ratio of each flow meter shall be minimum 1:20. The accuracy of the Ultrasonic flow meter shall be ±0.25% or better and repeatability shall be better than ±0.25% of reading and accordingly vendor shall select the no. of paths to meet accuracy requirement and indicate the same calculations/back-up literature. in The turndown ratio of each flow meter shall be minimum 1:40. The accuracy of the Ultrasonic flow meter shall be ±0.3% (including Lab uncertainty)or better and repeatability shall be better than ±0.1% of reading and accordingly vendor shall select the no. of paths to meet accuracy requirement and indicate the same in calculations/back-up literature Ultrasoni c flow meter Page 12 of 13 The Ultrasonic meter shall be flow calibrated with NG and shall have calibration certificate duly signed by Page 11 of 23 The Ultrasonic meter shall be flow calibrated with NG and shall have calibration certificate duly signed by weights & measures authority such as NMI, PTB or other reputed 16

18 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM 1 48 MR for USM & Metering Skid, Item no. 1, Bullet no. 4 Descripti on of Equipme nt & Services, weights & measures authority such as NMI, PTB or other reputed National Std laboratory of its country of origin such as Trans Canada Calibrations, (TCC) Canada,Colorado Engg Experiment Station Inc.(CEESI) USA,South West Research Inc. (SWRI) USA. Accuracy with wet flow calibration shall be demonstratd within ±0.25% for multi path type under flow conditions in the turndown ratio of 1:10. The meter proving system to be used by vendor shall be traceable to international stds and uncertainty of meter proving system shall be furnished. Gas metering system integration, testing, validation & including third party "wet' calibrations (only for the ultrasonic meters with its associated upstream / downstream meter runs) should be done in flow labs as detailed above Loose supply of three number (3) Flow computers, GC controller/display Unit along with printer, Isolators, barriers and repeaters, power supply units etc required for the system. Kindly confirm if all this material is to be supplied loose as per Technical Volume Page 7 - MR for USM & Metering Skids OR A complete Metering Control Panel housing all this equipments as per the SOR item no. 1.0 is to be supplied. National Std laboratory of its country of origin such as Trans Canada Calibrations, (TCC) Canada,Colorado Engg Experiment Station Inc.(CEESI) USA,South West Research Inc. (SWRI) USA. Accuracy with wet flow calibration shall be demonstratd within ±0.3% (including Lab uncertainty) for multi path type under flow conditions in the turndown ratio of 1:40. The meter proving system to be used by vendor shall be traceable to international stds and uncertainty of meter proving system shall be furnished. Gas metering system integration, testing, validation & including third party "wet' calibrations (only for the ultrasonic meters with its associated upstream / downstream meter runs) should be done in flow labs as detailed above Refer S.No PRICE SCHEDULE FOR USM & 2 - METERING SKID - Item no ANSI# 600 Ultrasonic Flow Meter (multipath), Meter runs, Field instruments, Flow Page 12 of 23 Refer S.No. 1 17

19 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM 1 computers Metering panel and control 50 MR for USM & Metering Skid, Item no. 1, Bullet no. 8 Descripti on of Equipme nt & Services, Serial Interface Cable (such as RS 485/ RS 232 cable) from Flow Computer and GC Display unit to RTU to be supplied by metering Vendor. Please provide the distance between FC/ GC Display unit and the RTU. The distance between FC/GC Display unit and the RTU will be 30 mts 51 MR for USM & Metering Skid, Descripti on of Equipme nt & Services, Item no. 1, First Para Supervision of erection and hydro test and commissioning by Vendor for 20 days. Vendor to quote per diem rates, inclusive of all expenses like travel, boarding, lodging etc. Please confirm that Supervision of Hyrdotest is not in bidders scope of supply as this activity is not envisaged during the installation of the US Meter runs. Refer Corrigendum 1 Stamped page 3 52 Preamble to Price Schedule for USM & 5 - Metering Skid Pt. 11 Bidder shall furnish charges for supervision of Erection / Testing / Commissioning in the format Terms and Conditions For Supervision of Erection, testing, & Commissioning as Annexure - 1 to SOR per diem rate for 4 days of supervision per item of SOR (Item 1 = 3 sets and Item 2 = 1 No) shall be considered in evaluation. As per MR for USM & Metering Skid, 1.2 Description of Equipment & Services, Item no. 1, Para-1; 20 days of per diem rates for supervision of erection and commissioning is to be quoted, whilst as per the SOR 4- days would be consider. Please confirm the no. of days that will be considered for Price Evaluation Refer S.No. 30 Refer Corrigendum 1 Stamped page 3 53 List of Recomm ended Vendors Flow Vendor Computers Please provide list of recommended vendors for Flow Computers. Daniel, Bristol Babcock, RMG, OMNI and Instromet 54 Gas Composit ion Sources of Gas Supplied and their composition are given below. Particular source may be selected depending upon Please confirm two particular sources, so that the calibration Gas cylinders could be considered accordingly. Or please confirm that we have to supply 4 nos. of Sources of Gas supply shall be RLNG at Dahej and Lean Gas at Vijaipur. Page 13 of 23 18

20 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM 1 requirement. Calibration Gas Cylinders Bullet no. 3 The ultrasonic flow meter with a minimum length of (10 D upstream + profiler + 10 upstream + meter + 5 D downstream straight lengths) shall be supplied by Vendor. This pipe shall fulfill the codes and manufacturer std requirements for such a measuring tube. As per our understanding, in reference to AGA 9 Pt. no. 7.2, For the Wet Calibrated US Meter; the upstream Pipespool may be 1OD after Flow Straightner and 5D downstream Pipe spool. And only in the event the wet calibration is not performed, then the additional 1OD before flow profiler is required. Kindly confirm if it is acceptable to supply the meter run with Flow Profile+1OD Upstream Spool + Meter+5D Downstream spool, entire Metering assembly calibrated at an independent flow calibration facility. OR We request GAIL! JPK kindly also consider! accept that in the event a Ultrasonic Meter Manufacturer having a Valid Type Test Approval from an Internationally Accredited Weights and Measures Body like NMI!PTB!etc. which confirms that the USM has an uncertainty of < +0.3% than maybe USM Meter run with 1OD±Flow Straightner+1OD+Meter +5D could be supplied without Wet Calibration. (The Type Test Approval Certificate alongwith the Test Reports could be presented to GAIL /JPK) Wet Calibration has to be carried out at six points. Flow profiler + 10D downstream + US Meter + 5D are required for Calibration at accredited lab Para 1 In order to provide proper alignment throughout the metering lines, three knock-out dowel pin holes with different diameters shall be drilled in the ultrasonic flow meter flanges and in the corresponding upstream and downstream meter tube flanges. The internal diameter of The Manufacturing process of USM is an OEM standard. It is understood that this requirement is not mandatory as we feel that the process of the USM design/ manufacturing should be left on the OEM. Please confirm our understanding. Page 14 of 23 Bidder s Understanding Correct 19

21 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM 1 the meter tubes shall be identical to the internal diameter of the ultrasonic flow meters Para 3 The circularity of the meter tubes shall comply with ISO requirements. Please provide the standard no. of ISO being referred. Circularity of the meter tubes shall comply with API Ultrasonic Gas Check! Custody Transfer Metering System shall be built and integrated only by the original equipment manufacturer of the Ultrasonic Flow Meter, since critical components within the custody transfer metering system should be compatible to ensure Overall System Uncertainty for this critical fiscal transaction purpose. All components within the metering system must be well proven and compatible in the similar application Ultrasonic Gas Check! Custody Transfer Metering System shall be built and integrated only by the original equipment manufacturer of the Ultrasonic Flow Meter, since critical components within the custody transfer metering system should be compatible to ensure Overall System Uncertainty for this critical fiscal transaction purpose. All components within the metering system must be well proven and compatible in the similar application Tender Condition prevails Each metering line shall be thermally insulated, including the ultrasonic flow meter, and the transmitters shall be installed in a protective enclosure in order to minimize the environmental temperature effects on the overall accuracy of the metering system. 1. It is understood that only the U!S & DIS Pipe spools with the USM is to be insulated and not the entire Metering Line. - Kindly confirm our understanding. 2. Kindly provide detail specifications for the Protective Enclosures for the Transmitters along with the MOC, also confirm if the same has to be with a thermostat controlled heater (Eexd) such that the temperature within the enclosure would be uniform disregard of the changes in the ambient conditions. 1. Bidders understanding is correct 2. Thermostat controlled heater is not required. 3. Protective Enclosures for Transmitters shall be weather proof to IP The ultrasonic flow meters shall be calibrated in an accredited laboratory. 1. It is understood that, that in the event it is not possible 1. Refer S.No. 55 Page 15 of 23 20

22 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM 1 If possible, complete lines shall be checked. If not, the ultrasonic flow meter shall be calibrated with its upstream length. The calibration shall be done on 5 points for each flow meter. Wet calibration of the complete metering run (including 1OD straight run before profiler, flow-profiler, 1OD meter run after profiler, US meter and SD straight run after meter) shall be performed as per AGA9 latest recommendations. to calibrate the entire assembly of 1OD + FS + 1OD + SUM + 5D than in that case, the calibration should be performed with 1 OD+USM. - Please confirm our understanding. 2. It may be noted that it might not be possible to get the entire assembly calibrated as for the 16 Meter the approximate length of the entire assembly would be mm, in that case we would request GAIL / JPK to allows us the calibration of the Meter with Flow Straightner, 1 U/s 1OD spool, USM and the SD Downstream Spool. 2. Tender conditions prevail Para 7 Metering supervisory system is to be provided at Bamnouli and SV 4. It is understood that Bamnouli and SV-4 are one and the same station and only One Metering supervisory is envisaged for the item no. 2 of SOR. One Metering supervisory system is envisaged. Bidder s Understanding is Correct Leak test : After final assembly on skid, all lines shall be pneumatic tested for detection of leaks by the method of soap bubbles Kindly confirm the pressure at which the pneumatic test is to be conducted. Also confirm if the pneumatic test isto be conducted for the 3 nos. of 16 USM Metering System also. Pneumatic Test Pressure shall be 7 bar The gas pressure letdown skid shall include the necessary equipment to perform safely the operation for which it is designed. It shall be equipped with, but not limited to (see also the relevant P&ID): One process connection at inlet (600 # acc piping class) One process connection at outlet (600 # acc piping class) Please confirm the actual requirement for the Process Connections at the PRS skid outlet. Refer Corrigendum 1 Stamped page 4 Page 16 of 23 21

23 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM 1 64 P&l Diagram SV-4 for Dispatch Station at Bamnouli (sheet 2 of 5) One Process Connection of 16 Line size at outlet is indicated on the D/S of PRS. Refer Corrigendum 1 Stamped page 42 to P&l Diagram SV-4 for Letdown Skid at Bamnouli, TOP, SV-4 (sheet 5 of 5) Two Separate Process connections of 12 & 16 with common outlet header of 16 is indicated. Refer Corrigendum 1 Stamped page 42 to Last bullet and first Para One manual actuated inlet double block and bleed integrated isolation valve. This valve shall be equipped with a bypass for line pressurization this by-pass shall be composed of one 2 isolation valve and one manually operated control valve. Please confirm that For the By-pass for line pressurization a Globe/plug valve is envisage for throttling purpose and not a manually operated control valve. Bidder s understanding is Correct contd. One slam shut-off valve, with the following character istics: Last Bullet the setting range shall be: for the maximum set point, 90 to 150% of the maximum outlet pressure; for the minimum set point, 10 to 40% of the maximum outlet pressure. Based on the Setting range indicated for minimum and maximum se-point, It is understood that under pressure cut-off (UPCO) for the SSV is envisaged for this application. AS per standard practice UPCO is not provided for high pressure installations and only OPCO (Over Pressure Cut-off) is provide. Please confirm I clarify the requirement. Both UPCO & OPCO shall be provided Scope Pt. no VDC - Shall be provided at one end for the control panel by client I others. 1. Please confirm that 24 VDC source shall be made available by client! others. 2. Also confirm is any source for 230 VAC UPS supply shall also be available. 3. Also confirm the power source availability for the Chainsa Meter run Panel (if a panel is to be supplied). 24 V DC will be supplied to Vendor. Vendor to convert to other level of Voltages required. Page 17 of 23 22

24 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM Package Unit Instrume ntation 13 Spec. for Panel, subclause 13.8 USM Based Metering Skid 3.4 Metering Supervis ory System Vendor to provide meter supervisory system with desk top computer + HMI software with all cableslfurniture and complete with configuration of all parametersldisplays as per P&lDs, details furnished during detail engineering, The operating system of the Metering Supervisory System shall be window based. The computer system for the supervisory control system shall be industrial type IBM compatible, suitable for continuous operation in the nonair-condition environment. It will be mounted in the control panel Kindly confirm if the Supervisory System has to be a standard Desktop type (as per Instrumentation Package - Control Panel) or that the same has to be industrial type which will be installed in the Control Panel (as per Metering Skid specifications for the Metering Supervisory). Also confirm the type of display required for the same (is the Monitor required to be of Industrial grade or a standard TFT - LCD Monitor is acceptable) Everything monitor(tft/lcd), keyboard, and printer shall be panel mounted. Monitor shall be of Industrial grade Flow Compute r Last Para Printers for GC and EC shall be desktop type and shall be supplied along with required furniture by contractor. In the tender document at several places it is indicated the Printer for the GC & FC shall be mounted in the Control Panel, whilst here it is mentioned otherwise, please confirm the exact requirement. Further it may be noted that the Dot-Matrix Report Printer could be installed in the Control Panel and the LaserJet Report Printer (for GC Reports and Daily reports from the HMI) should be installed on a separate furniture outside for ease of day to day operations. Printer for the GC & FC shall be mounted in the Control Panel. 72 Flow Meter Instrume ntation & Leak test using a known reference gas at the maximum rated pressure of the Please re-confirm that leak test at Max. Rated Pressure i.e barg is to be conducted during the FAT for Leak Test Pressure is 7 bar. Page 18 of 23 23

25 CHAINSA JHAJJAR BAMNOLI PIPELINE PROJECT TENDER FOR FILTERATION & METERING TECHNICAL CORRIGENDUM 1 Control Tests Bullet - 4 meter. the US meters. 73 Ultrasoni c Flow Meter Instrume ntation & Control Tests Last Bullet Transducer replacement test to demonstrate the ability of the transducer extraction/replaceme nt tool under operating pressure conditions. A zero flow verification test shall be repeated to verify the accuracy and performance of the meter after replacement of one or more transducer pairs. It is understood that a type test report for the same has to be submitted and not the actual testing as described under this clause is envisaged. Please confirm our understanding. Bidder s understanding is Correct. 74 Tech Specs for Flow Compute r 9 Ticket Printer Ticket printer to be included by vendor within each flow computer unit for printing the reports Kindly confirm acceptance of one common printer with an automatic changeover switch for the flow computers. It maybe noted that in the event this Printers have to be mounted in the Control Panel than installing 2 or 3 ticket printers within the same control Panel might increase the size of the Panel too. At Chainsa, Single Printer is acceptable. At Bamnoulli, the printer of Meter Supervisory System shall be used to indicate flow values. 75 Tech Specs for Flow Compute r 10 Misc, Pt. b) PID control shall be implemented in flow computer. Also independent microprocessor based PID controller shall be supplied. User will select implementation of PID control in flow computer or independent controller. Please re-confirm that the PID Control is required in the Flow Computer as well as Separate PID controllers for each FCV is to be supplied. Independent PID Controller is required, the same shall be integrated with Metering supervisory system. 76 Chromat ograph - NG Metering Station 5.1; Pt. (vi) Cycle time: Operator assignable (5 minutes max). We would request you to kindly confirm the same as GAIL for applications smaller than this tender requirement is also asked for cycle time of less than 4 minutes whilst here it is mentioned as 5 minutes max. Tender Conditions prevails. Page 19 of 23 24