Document No. Cl. No. Section Section Detail/Description Pre-bid query APGDC/ MECON's Reply 198 Technical Volume II of II Proposed System Architecture for TGM/RPD Based Metering Skid Page No. 209 of 633 Signal form LEL What are the serial data required from LEL monitor, request also to provide the moitor specs. Tender Condition Prevails. However, serial data to be provided as per site requirement. 199 Technical Volume II of II General Pressure drop We request GAIL/Mecon to confirm maximum DP allowed or not? Pressure drop across the skid of Item no. A.1 shall be 6 kg/cm2. Rest Tender condition prevails. 200 Technical Volume II of II General Pressure drop Please provide the acceptable DP across the compel skid and also across the FCV. The same is required for the sizing of FCV. Pressure drop across the skid of Item no. A.1 shall be 6 kg/cm2. Rest Tender condition prevails. 201 Technical Volume II of II General Temperature We request Mecon/GAIL to Please provide inlet and outlet temperature of all station Tender conditions prevail. 202 Technical Volume II of II Annexure III General Drawings As per the drawings provided in the tender document 03 streams of 8" Metering Lines with 02 stream of PRS at downstream have been considered. We would like to inform you that in this scenario it shall be difficult to design the PRS as per the tender requirement. We request you to kindly consider higher size (12") 02 metering streams which will suffice the flow requirement. As per our experience it will reduce the operation & maintenance cost drastically and also will be a feasible option. Request you to kindly confirm on the same. Tender conditions prevail. 203 Commercial 1.0 Salient Features Of Bid Document Volume I of II Clause No. 1.5 Page No.: 4 of 220 Delivery from Fax of Acceptance : 9 (nine) months from the date of issue of Fax of Acceptance (FOA) on FOT site Basis. Date of receipt & acceptance of material at site shall be considered as the date of delivery. Looking into the size of meters and the requirement of Calibration and 3.2 certification we request MECON / GAIL to kindly accept delivery period of atleast 10 months from the date of FOA. Tender conditions prevail. 204 Commercial 26. Price Reduction Schedule For Delayed Delivery Volume I of II 26. Price Reduction Schedule For Delayed Delivery Page No.: 170 of 220 26.1.1 Deductions shall apply as per following formula: In case of delay in delivery of equipment/materials or delay in completion, total contract price shall be re...
Document No. Cl. No. Section Section Detail/Description Pre-bid query APGDC/ MECON's Reply 172 Technical Volume II of II Specification for Control Panel & Accesories Point No. b Page No. 63 of 633 Control Panel : 3 mm thick CRCA steel/5.0 mm thick HRCA steel, Welded to frame Please confirm the acceptance of Rittal Standard Specs. Rittal Make panels are also acceptable. Rest, Tender Condition Prevails. 173 Technical Volume II of II Technical Specification for On line Gas Chromatograph Point No. c Page No. 76 of 633 e) RS485/RS-232C communication ports with modbus protocols to communicate with Flow Computers of various make like Instromet, RMG, Xxxxxx, Bristol Xxxxxxx, FMC, OMNI, PIETRO etc. installed in the same control room. Please include Elster Instomet Make Flow Computer FC1. Included. 174 Technical Volume II of II Technical Specification for On line Gas Chromatograph Point No. c Page No. 76 of 633 c) Four nos. 4 to 20 mA (isolated) output signals for driving 600 Ohms load resistance. Outputs will be used for: (and shall be user configurable): I Gross calorific value II. Relative density (specific gravity) III. Mole % CO2 IV. Mole % N2 Each output should be user assignable. We request GAIL / Mecon to avoid 4 - 20 Ma, as the same is not used nowadays for metering. Tender Condition Prevails. 175 Technical Volume II of II PORTABLE CONFIGURATOR: Point No. c Page No. 77 of 633 i. The Portable configurator should have at least Pentium-4 processor, 10 GB hard disk, 128 MB internal RAM, serial port, CD Combo Drive, 17” LCD display. Other details are as under: a) The portable configurator should provide the facility to store all the analysis results made in the past. They can be retrieved and printed out at any time. This PC will be used for following functions: i) Any modification in the programs, which will be used by the analyzer. ii) To Retrieve all data from the analyzer including the chromatogram and should have the facility to configure/ change user related data and should have diagnostic features to face any trouble shootings. Please confirm the requirement of Separate Laptop for GC, however GC softwares can be loaded on HMI PC. For USM skids, Laptop is already envisaged & the GC software needs to be loaded in that laptop. Rest, Tender condition prevails. 176 Technical Volume II of II Technical Specification for On line Gas Chromatograph: Point No. 1.9 Page No. 79 of 633 Gas Chromatograph shall transmit data to remotely mounted flow computers through serial link. Req...
Document No. Cl. No. Section Section Detail/Description Pre-bid query APGDC/ MECON's Reply
Document No. Cl. No. Section Section Detail/Description Pre-bid query APGDC/ MECON's Reply 23 213-219 P&ID You have shown DPG across filters . We couldn't find data sheet for Diff Pressure gauge; kindly furnish same. Refer Data sheet of Diff. Pressure gauge attached as annexure-2 withcorrigendum #2. 24 We understand that Third party inspection charges shall be in the scope of Biddder; Kindly confirm our understanding is correct Bidder's understanding is correct. Rest, Tender Condition prevails.
Document No. Cl. No. Section Section Detail/Description Pre-bid query APGDC/ MECON's Reply 79 05/51/23QC/APGDC/030 - MEC / 05 / E5/ TS / XXX-000 Xxx 0 (Xxxx 00 of 633) Straightening vanes shall be provided to eliminate swirls and cross current setup by the pipe-fittings, valves or regulators preceding the meter inlet piping. Straightening vanes shall be designed according to latest revision of AGA Report No-3. Straightening vanes shall be tube bundle of 316 SS tubes and shall be designed and approved by the meter manufacturer. As per AGA-7 In-buit straightner (Within Flow Meter) is acceptable. Please confirm the same. Tender Condition Prevails. 80 05/51/23QC/APGDC/030- MEC / 05 / E5/ TS / XXX-000 Xxx 00 (Xxxx 00 of 633) The turbine meter shall be calibrated with natural gas near operating pressure. Kindly confirm whether calibration using air is acceptable. Tender Condition Prevails. 81 05/51/23QC/APGDC/030- MEC / 05 / E5/ TS / XXX-000 Xxx 00 (Xxxx 00 of 633) The turbine meters shall have HF pulses on the meter head and shall be connected to the flow computer. For Turbine meter of size up to 3", one(1) HF pulse and one(1) LF pulse is also acceptable. However for Turbine meter of size 4" and above, two(2) nos. of HF pulse is required. As per our understanding, only one HF pulse input shall be connected to flow computer and the other (LF/HF) shall be considered as spare. Please confirm. Tender Condition Prevails. 82 05/51/23QC/APGDC/030- MEC / 05 / E5/ TS / TFM-030 Sec 18.3 (Page 56 of 633) Flow calibration shall be performed for at least seven points and error curve shall be obtained. Test medium shall be Natural Gas. Kindly confirm whether calibration using air is acceptable. Tender Condition Prevails. 83 05/51/23QC/APGDC/030- MEC / 05 / E5 / TS/ GC -030 (Page 71 to 81 of 633) Technical Specification for On line Gas Chromatograph As per our understanding, gas chromotograph is applicable only for Metering Package with Ultrasonics Flow Meters (i.e Group-A). Please confirm. Gas Chromatograph is required for all the Items of Group A. 84 05/51/23QC/APGDC/030- MEC/23QC/05/E9/E/00 1 Sec 2.2.3 (Page 105 of 633) All the power and control cables from Electrical Panel to Heater Control Panel and to Electrical Heater required as per the specification. Kindly provide the distance between Heater Control Panel and Metering skid to consider the cable length as the Heater Control Panel to be installed at indoor. Please refer 2.2 1 (i) of Scope of Work (Page 21 of 633) in Volume-II of I...
Document No. Cl. No. Section Section Detail/Description Pre-bid query APGDC/ MECON's Reply 89 05/51/23QC/APGDC/030- MEC/ 05/E5/DS-PG (Page 161 of 633) Options: Liquid filled casing shall be provided As per standard installation practice, liquid filled casing is required for the applications where the vibration will be more (i.e Pump discharge, compressor discharge, etc). As our package is simple metering skid, no liquid filled casing is required for all gauges. pelase confirm. Liquid filled casing is not required. 90 05/51/23QC/APGDC/030- DS No: MEC/ 05/E5/DS- TG (Page 162 of 633) As per Temperature gauge data sheet, Mercury Filled Temperature is selected. Please kindly note that this type of gauges is banned. As per our understanding Bimetal type Temperature gauges are acceptable for our metering skid. Please confirm. Bimettalic type temperature gauges are also acceptable. 91 05/51/23QC/APGDC/030- DS No: MEC/ 05/E5/DS- TG (Page 162 of 633) Thermowell flange material shall be SS316. As per previous bids with Mecon specification, ASTM A105 flange is acceptable for Thermowell. We hope the same is acceptable for this project. Please confirm. Tender Condition Prevails. 92 05/51/23QC/APGDC/030- DS No: MEC/ 05/E5/DS- PT (Page 163 of 633) Accuracy shall be ± 0.025% of SPAN As per standard supply of metering skids ± 0.1% accuracy is acceptable. Also most of our previously supplied skids with this accuracy is proven with good working condition. We hope for this project the same is acceptable. Please confirm. Tender Condition Prevails. 93 05/51/23QC/APGDC/030- DS No: MEC/ 05/E5/DS- RTD (Page 164 of 633) Thermowell flange material shall be SS316. As per previous bids with Mecon specification, ASTM A105 flange is acceptable for Thermowell. We hope the same is acceptable for this project. Please confirm. Tender Condition Prevails. 94 05/51/23QC/APGDC/030- DS No: Rev. MEC/ 05/E5/DS-FCV (Page 172 of 633) Body Material: ASTM A352 GR. LCB/A350 GR. LF2 As per Control valve Manufacturer standard Casting body will be used. Please confirm whether casting body with Low temp. grade (A 352 Gr LCC) is acceptable. Acceptable 95 05/51/23QC/APGDC/030- Doc. No.: MEC/05/E5/FC-SIV (Page 179 of 633) Panel Mounted Flow Computers As per our understanding, Flow Computer shall be installed indoor. Please confirm. Tender Condition Prevails. 96 05/51/23QC/APGDC/030- Doc. No.: MEC/05/E5/FC-SIV (Page 184 of 633) Original licensed software for retrieving the stored data, programming the Flow Computer using La...
Document No. Cl. No. Section Section Detail/Description Pre-bid query APGDC/ MECON's Reply 100 05/51/23QC/APGDC/030- DS No: MEC/ 05/E5/Spec.- Laptop (Page 207 of 633) SPECIFICATION FOR LAPTOP As per our understanding, Laptop will be under client scope. Pelase confirm. If Laptop to be considered please provide the quantity. Refer reply to query no. 19. 101 05/51/23QC/APGDC/030- MEC / 05 / E5 / TS/ CP - 030 (Page 60 to 70 of 633) SPECIFICATION FOR CONTROL PANEL & ACCESSORIES Please confirm Flow computer can be mounted on this control panel itself. Panel Mounted Flow Computers may be mounted in the bidder's supplied Metering panel. No separate panel for flow computer is required. 102 Inspection & Testing As per scope of work Vendor to carry out 3.2 certification for the complete supplied items and as per datasheet 3.1 certification Required conformation regarding certifications shall be EN 10204 Type 3.2 or 3.1 . Tender Condition Prevails. 103 Inspection & Testing for Pipe, Flange, Fittings , Gaskets and Fasterners As per scope of work Vendor to carry out 3.2 certification for the complete supplied items and as per QAP & Technical spec 3.1 certification we shall follow 3.1 certification for Pipe, Flange, Fittings , Gaskets and Fasternersas per QAP & Technical spec. 3.2 certification to be done for Pipe, Flange, Fittings , Gaskets and Fasterners. 104 Ball, Globe & Check valve As per datasheet of ball, globe & check valve radiography not required and as per Technical spec radiography required 100% 600# and above we shall follow as per Technical spec for Ball, Globe & Check valve. Required as specified in Technical specification. 105 Pressure safety valve & Creep relief valve As per datasheet of PSV & CVR radiography required 100 % as per Technical spec radiography required 100% 600# and above we shall follow as per Technical spec for Pressure safety valve and creep relief valve. Refer PSV/CRV datasheet attached with tender document. 106 Self activated pressure control valve and Slam shut valve As per datasheet 100% radiography required and as per tender QAP no radiography required Required conformation regarding radiography of PCV & SSV. 100% radiography to be done, if applicable. 107 2.2 SCOPE OF SUPPLY 1) x) A structural skid complete with necessary drip pan, walkways, staircase, platforms, gratings, handrails for access for operation and maintenance. Drip Pan shall not be applicable for the Gas skids. Please confirm. Tender Condition Prevails. 108 2.3 Further Scope of Wo...
Document No. Cl. No. Section Section Detail/Description Pre-bid query APGDC/ MECON's Reply 114 PRESSURE REDUCTION SKID AT IPS-3 (Ref P & ID No.: MEC/23QC/05/28/M/00 1/0015) Pipe sizes Inlet : 12" Outlet : 12" As per pipe sizing Pipe sizes shall be as below, please accept Inlet : 8" Outlet : 10" Tender Condition Prevails. 115 TYPE – 2 (FOR CGDN / CONSUMER CONNECTIVITY) (Ref P & ID No.: MEC/23QC/05/28/M/00 2/0002) Pipe sizes Inlet : 2" Outlet : 3" As per pipe sizing Pipe sizes shall be as below, please accept Inlet : 1.5" Outlet : 2" Tender Condition Prevails. 116 TYPE – 1 (FOR CGDN / CONSUMER CONNECTIVITY) (Ref P & ID No.: MEC/23QC/05/28/M/00 2/0001) Pipe sizes Inlet : 2" Outlet : 3" As per pipe sizing Pipe sizes shall be as below, please accept Inlet : 1.5" Outlet : 2" Tender Condition Prevails. 117 2.3.10. b) Calculation of metering system uncertainty based on the approved design and it shall be within +/-0.3 %. (Vendor shall submit the Calculation for overall system uncertainty including all components of the metering system). Wet Calibration of Ultrasonic / Turbine Meters shall be done (at 45-50 Kg/cm2 or more) by the bidder considering the above mentioned overall uncertainty. The calibration shall be done at minimum 7 points initially. The calibration shall be done at the following nominal flow rates: 0.025 qmax, 0.05 qmax, 0.1 qmax, 0.25 qmax, 0.5 qmax, 0.75 qmax, and qmax. The calibration reports should also contain verification for minimum two flow readings after adjustment of factors as per AGA 9 / 7. Tender Condition Prevails. 118 1.0 GENERAL Flow Rate Each streams of Skid shall be designed to cater flow of 50% / 100 % of max. (Rated) flow capacity (as per P&ID). We understand that mentioned flow on P&ID is max Rated flow. Bidder's understanding is correct. 119 P&ID Xx.Xx. 213 to 219 of 633 Temperature Design Upstream as - 29 to 65 DegC. Temperature Design Downstream - 45 to 65Deg C. Kindly Confirm the working & sizing temperature for regulator. Tender Condition Prevails. 000 X&XX Xx.Xx. 213 to 219 of 633 Point 14 of notes. Temperature at inlet of the skid has been asumed 25 Deg C(Min). How ever M/s APGDC has to confirm. Please confirm the Minimum temperature it will be useful in material selection. Tender Condition Prevails. 121 Data Sheet: pressure control valves & Slam shut Xx.xx. 169 , 170 Body Material: ASTM A352 GR. LCB/A350 GR. LF2 If Minimum temparature is 25 Deg C then WCB material will be suitable, because WCB can withstand upto -25Deg C to 65 Deg C....
Document No. Cl. No. Section Section Detail/Description Pre-bid query APGDC/ MECON's Reply 145 VOL II of II Page 33 of 633, Clause no.4.0)) Process Description The maximum permisssible pressure across USM skids is higher than 3 Kg/cm2 g mentioned in the tender for designing the skids. We request Mecon/ APGDC to allow SSV and regulator with available pressure to optimise sizing and for better performance Pressure drop across the skid of Item no. A.1 shall be 6 kg/cm2. Rest Tender condition prevails. 146 We request APGDC/ Mecon to review the requirement of LTCS MOC for Pressure Regulating system because even after pressure reduction the gas temperature will be well above the design temperature of CS MOC (-29 deg C) Tender Condition Prevails. 147 VOL II of II Page 35 of 633, Clause no.6.2 Clause B) As per our understanding we have to perform pneumatic leak test duriing FAT at 7 Kg/cm2 not at operating pressure as mentioned in the clause. Please confirm our understanding is correct Tender Condition Prevails. 148 VOL II of II Page 36 of 633, Clause no.6.3.1 Clause C) Requirement of Hydro test along with Meter Run is not applicable for Gas Ultrasonic Meter. However we will be performing Hydro test of bare body of the meter at Manufacturing location Hydrotest of meter runs & bare body of meter is to be carried out. Rest, Tender Condition Prevails. 149 VOL II of II Page 41 of 633, Clause no13.0 and 13.1) Mandatory Spares Mandatary spares list is only mentioned for PRS. However there is no mention of spares requirement for critical instruments like Ultrasonic Meter, Gas Chromatograph and Flow Computer. Please review and advice 1 set of "Sensor Transducer assembly" is required for USM as Mandatory spare with each USM skid. However, Mandatory spare for FC & GC is not required. Rest, Tender Condition Prevails. 150 As per understanding Regulator, SSV and Meter both Cast and Forged body is acceptable and necessary tests like radiography etc is applicable Tender Condition prevails. However, equivalent casting grades are also acceptable. 151 Approved Vendor List for Ball Valves As per our understanding all approved vendors in GAIL/ EIL for Ball Valves like Flowchem, Microfinnish etc are accepted PTR may be submitted. However, Tender Condition Prevails. 152 Globe Valve and Check valve datasheet for LTCS Material As per P&ID, the PMS code for the PRS Skid and downstream valves including the FCV is D4A We understand that the PMS code fD4A shall be considered for the downstream of the PRS...
Document No. Procurement of USM / TURBINE BASED METERING SKID FOR KAKINADA-SRIKAKULAM PIPELINE PROJECT (PHASE-1) Tender Doc. No.: 05/51/23QC/APGDC/030 (E Tender No. 140042 ) Reply to Pre-Bid Queries MECON LIMITED Andhra Pradesh Gas Distribution Corporation Ltd.
