invitation for bids - Gail

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layers shall be staggered joint construction and each layer shall besecured in place and details of securement shall be the same for eachlayer.e) Wet or Damaged Insulation shall not be used under anycircumstances. Insulation materials are to be applied shall not be keptover bare ground to avoid water absorption. Installed materialsawaiting its protective cover shall be adequately protected fromdamage, rain and contamination and shall be covered with cladding ata minimum loss of time.f) Piping: Rock or glass wool shall be in preformed pipe section in twohalves for sizes upto which manufactured and at least for all pipeswith outside diameter over insulation of 500 mm. In bigger sizes,multi segments are preferred if manufactured, otherwise, blankets areacceptable.g) Insulation Securement: Each layer of insulation shall be securedfirmly in place with at least three loops of binding wire/bend, one loopto be placed not more than 75mm from each end and at least one loopto be equally spaced between end loops, for each section. Binding wireshall be drawn about the insulation with end tightly twisted together,bend under and pressed into the surface of insulation. Bends or wiresin no case are spaced more than 200 mm apart.h) Expansion joints shall be provided at regular intervals as below:Temp øCSpacing (M)Upto 200Not required200 to 300 10300 to 350 8Expansion joints shall be formed by 25mm space between the pipeinsulation sections and space shall be filled by compressed mineralrock fibre.i) Elbow & Bends: For bends of pipe size 6" and below due to lack ofspace insulation shall be secured by spirally wound 16 SWGgalvanized steel wire for hard materials and 10 SWG galvanized steelwire for soft materials.j) Flanged Joints or Valves: These shall be insulated with prefabricatedremoval Aluminum covers, lined with pipe sections/lags/slabs.Insulated valves shall be completely covered, but the insulation shallbe cut and shaped around the valve stem and kept clear of thestuffing box gland.k) Head of Equipment: Preformed blocks and slabs cut and shaped to fit.Alternatively blankets may be accepted.24
14.0 COLD INSULATION:-A) Insulation materials slabs and sections shall be stored on a flatsurface in horizontal position. All precautions shall be taken to ensurethat each day's work is vapour sealed and cladded during erection andbefore being left over-night to prevent seepage of water into thematerials and getting trapped. The system shall be protected bytarpaulins, water shed and other protective means.B) All flanged joints shall be cold insulated with removable boxinsulation. Bonnet of valves above the packing gland does not requireinsulation.C) All materials used for insulation, fixing, sealing, and protection shallbe new and shall conform to the specifications. All insulatingmaterials whether dry or wet shall be non-corrosive to the surfacesinsulated.D) Operating Temperature Range: Insulation Materials:- 195 0 C to + 80 0 C Polyurethane foam or PolystyreneE) Form of Insulation for Pipes upto 16" dia : Preformed pipes sections.The material used shall not disintegrate, settle, and change its form ofcomposition, in a detrimental way at the service conditions. Thematerial shall be chemically inert, moisture free rot and vermin proof.F) Polyurethane foam:a) The insulation material shall be rigid pre formed cellular Urethanefoam of self-extinguishing type in accordance with ASTM-C - 591,TYPE - II Grade - 2. The foam shall be formulated in such a way thatit shall be of a self-extinguishing quality which under nocircumstances shall cause fire to spread.b) The density of finished foam shall be within 35.0 Kg/m 3 Kg/M3 to 40Kg/m 3 and shall be determined in accordance with ASTM C-302.c) Thermal conductivity: Thermal conductivity of the polyurethane foamslabs and sections shall not be exceed 0.019 K Cal/hr. M C (0.16BTU/ft2 hr F /inch.) at 10 C mean temperature after ageing.G) Pipe support Finished foam PUF density will be 250 Kg/m 3 and shallbe determined in accordance with ASTM C-302.H) ANCILLARY MATERIALS:a) Wire netting shall be galvanized 22 SWG x 20 MM to secure insulationblocks. Lacing and stitching wires shall be 22 SWG galvanized ironwireb) Bands: Shall be of Aluminum, of dimension 20 mm width x 22 SWG,unless specified otherwise.25
Page 3 and 4: GAIL (India) LimitedGIDC INDUSTRIAL
Page 6 and 7: id in the format made available in
Page 8 and 9: A. General1. Scope of Bid2. Eligibl
Page 10 and 11: Section VIGeneral Conditions of Con
Page 12 and 13: equest and the responses thereto sh
Page 14 and 15: Part ‘III’ - BID SECURITY in or
Page 16 and 17: considered as binding upon the bidd
Page 18 and 19: 41. Rejection CriteriaBidder's Bid
Page 20 and 21: SECTION-IIISCOPE OF SERVICES &SPECI
Page 22 and 23: one location as directed by the EIC
Page 24 and 25: iv)Reducers will be considered with
Page 28 and 29: c) The adhesive to be use for bondi
Page 30 and 31: f) Insulation of piping shall be st
Page 32 and 33: authorities and shall keep the Owne
Page 34 and 35: SECTION - IVFORMSANDFORMATS32
Page 36 and 37: F-2ToBID FORMSUB: INSULATION WORK I
Page 38 and 39: F-4PROFORMA FOR BANK GUARANTEE FOR
Page 40 and 41: F-5ADETAILS OF SIMILAR WORK DONE DU
Page 42 and 43: F-6ADECLARATIONTo,GAIL( India) Limi
Page 44 and 45: F-8COMMERCIAL QUESTIONNAIRESUB: INS
Page 46 and 47: F- 10OFFER / APPLICATION FORMATRef:
Page 48 and 49: SCHEDULE OF RATESSECTION - VSlnoDes

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