Fabrication, welding and erection of process pipelines at HWPK site.

Amount

Carbon steel piping welding (TIG welding with argon gas purging using AWS ER 70 S 2 for root & subsequent stablising pass, then remaining to be welded with SMAW using AWS E-7018-1 spl.electrodes) including bevel edge preparation,LPT as per HWPK piping specification and guide lines of engineer incharge.

SW/FW up to Sch XXS

BW upto Sch XXS

stainless steel piping welding (TIG welding with argon gas purging using AWS ER 316L for root & subsequent stablising passes,then remaining to be welded with TIG without purging ) including bevel edge preparation,LPT as per HWPK piping specification and guide lines of engineer incharge.

SW/FW upto Sch XS

Butt Weld upto Sch XS

Carbon steel piping welding (SMAW welding using AWS E-7018-1 electrode for root & all subsequent passes) including bevel edge preparation,LPT as per HWPK piping specification and guide lines of engineer incharge.

SW/FW upto Sch 80

Butt Weld upto 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.

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 desginated place/HWPK stores as per guideline of engineer In Charge .

Fabrication, welding and erection of structural steel platforms/sliding supports/support clamps with structural sections/plates/gratings, structural steel required for the job shall be supplied by department & to be fabricated by contractor as per site conditions in guidelines of the HWPK engineer.

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 whereradiography is to be taken with necessary caution display board.

Stress relieving of the 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.

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) Cnotractor shall follow the weld build up guidelines of Engineer In charge.

Supply of carbon steel pipe fittings as per details given below.

1" NB x sch 80 seamless carbon steel pipes of A 106 GR B and dimension confirming to ANSI B 36.10

1-1/2" NB x 3000# scoket weld type elbow material confirming to A 105 and dimension as per ANSI B 16.11

1/2" NB x 3000# scoket weld type LR elbow material confirming to A 105 and dimension as per ANSI B 16.11

wintech Developers Pvt Ltd, (BID ID -3146030)