HWPK/MECH/2024/342

Amount

Carbon steel to carbon steel piping welding job including pipe cutting, bevel edge preparation and fit up with the use of GTAW process for root & stabilizing pass using ER 70 S 2 filler and SMAW process for fill up /final passes using AWS E 7018-1(spl.) electrode. Job also includes Liquid penetrant test of each joint after root and final pass. Preprration of as build isometric drawings and weld inspection report. The ten to fifteen percent of total quantity job shall be at a height of thirty to fifty meter height above the ground. For execution of welding job at height scaffolding/winch system shall be used. Contractor shall arrange all scaffolding material/winch system as per job requirement & guideline of EIC.

SW/FW/NW type joints of Sch XXS

BW type joints up to Sch. XXS

stainless steel to stainless steel piping welding job including pipe cutting, bevel edge preparation and fit up with the use of GTAW process for root, stabilizing & fillup/final passes using pass using ER 316L filler wire. Job also includes Liquid penetrant test of each joint after root and final pass. Preparation of as build isometric drawings & weld inspection report. The 70 to 80 % of total quantity shall be at a height of 5 to 15 meter range. For welding job at height scaffolding/winch system shall be used. Contractor shall arrange all scaffolding material/winch system as per job requirement & guidelines of EIC.

SW/FW/NW type joints of Sch 40S

BW type joints up to Sch. 40S

Carbon steel to carbon steel piping welding job including pipe cutting, bevel edge preparation and fit up with the use of SMAW process for root, stabilizing pass, fill up/final passes using AWS E 7018 electrode. Job also includes Liquid penetrant test of each joint after root and final pass. Preparation of as build isometric drawings and weld inspection report. The 100 % job shall be at a height of zero to fifteen meter height above the ground. For welding job at height scaffolding material and its preparation shall be in contractor scope. Contractor shall follow guidelines of HWPK piping/tender specification with prior approval of EIC.

SW/FW/NW type joints of Sch 80

BW type joints up to Sch. 80

Erection of CS/SS welded pipes along with its fittings, flanges, valves, SRV's, rupture disc, carrying out flange jointing and torquing, u clamps, anchors, pipe hangers, etc. shifting of material from central store shall be in scope of contractor. All the scaffolding material, material handling equipments like chain pulley blocks, slings, ropes, grinding machine shall be in contractor scope of work. Hydro testing of newly fabricated line shall be contractor scope.

Removal of existing installed pipes from their position by gas cutting, grinding m/c etc :-Existing pipeline to be cut and removed by grinding/ gas cutting and shifting of same to designated place/HWPK stores as per guideline of engineer In Charge. all the scaffolding material, material handling equipments like chain pulley blocks, slings, ropes, gas cutting set and grinding machine shall be in contractor scope of work.

Supply & fabrication, welding and erection of structural steel platforms/sliding supports/support clamps with structural sections/plates/gratings to be fabricated by contractor as per site conditions in guidelines of the HWPK engineer.

Weld build up inside tanks, valve bodies and flange areas at various locations as marked by engineers InCharge. The job includes following works :-(1). Cleaning of area with Wire brush/grinder.(3)Root pass and Subsequent pass welding with GTAW process with use of ER 70 S 2 Filler wire. (4). Balance Passes With SMAW process with electrode E 7018-1.(5). Flushing of excess welding to match the adjacent area thickness. (6). Liquid penetrant testing before weld build up, after every pass of weld build up & After weld build up job completion.(7).Preheating of area as per job requirement before start of weld build up.(8) Contractor shall follow the weld build up guidelines of Engineer In charge.

Radiography of the weld joint with gamma ray source as per ASME code section III :-For carrying out radiography work, contractor should arrange Gamma ray source of proper capacity. Arrange for punching segment mark on the pipeline nearer the weld joint arrange source and film positioner, taking exposed film and developing it, drying the film and submission to HWPK engineer. Film to be used for this purpose shall be NDT - 65 or its equivalent. They should also cordon the area where radiography is to be taken with necessary caution display board.

Post weld heat treatment of welded joints by resistance heating up to 610 degree centrigrade after radiographic examination. The chart of stress relieving shall be submitted to Engineer In charge. The contractor shall follow the HWPK post weld heat treatment procedure as per guideline of EIC.

wintech Developers Pvt Ltd, (BID ID -3194890)