HWPK/Mech/2022/316

Amount

Carbon steel piping welding (TIG welding with argon gas purging at root pass & subsequent stablising passes and finally to be welded with SMAW electrodes AWS E-7018-1 spl.) asper technical specification and guide lines of engineer incharge.

SW/FW up to Sch XXS

BW upto Sch 80

BW more than Sch 80 to Sch XXS

Stainless Steel Piping including bevel edge preparation, carrying out welding work as per technical specification (TIG welding with argon gas purging at root pass & subsequent stablising passes and finally to be welded. electrode shall be E-316L for filler passes.

SW/FW upto Sch XXS

Butt Weld upto Sch 80

Butt Weld More than Sch 80 to Sch XXS

Carbon steel piping welding with SMAW method & as per technical specifications, alingment and fitup for welding joints including bevel edge preparation, carrying out welding work as per technical specification (welding with SMAW electrode E-7018 spl.) and as per guideline of HWPK engineer

SW/FW upto Sch 80

Butt Weld upto Sch 80

Erection of pipes along with its fittings, flanges, valves, SRV's, rupture disc, carrying out flange jointing and torquing, welding of supports, anchors, pipe hangers, etc.

Removal of existing pipe cutting, grinding etc from the position:-Existing pipeline to be removed by grinding & cutting by gas/ electrode and making the ends ready for insttalation of butt welded tee. removed pipe spool to be returned to HWPK stores.

Fabrication, welding and erection of structural work for piping supports and strenthening of supports amd platform etc.:-For laying newly welded pipelines with structural sections materials are to be supplied by department & to be fabricated by gas cutting, erection and welding shall be as per site conditions and as per the 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 heating up to 610 degree centrigrade after radiographic examination. The chart of stress relieving shall be submitted to EIC of the work for examination.

Weld build up inside tank and valve bodies area at various locations as marked by engineers incharge. the job includes following works :-(1). Welder qualification as per approved WPS including all destructive/Nondestructive testing required for welder qualification(2).claning 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 tank adjacent area thickness.(6). Liquid penetrant testing before weld build up,after every pass of weld build up & Final After weld build up job completion.(7).Preheating of area before start of weld build up.

Replacment of existing drain collection tank including following jobs :- 1. Removal of existing structural platform, pipelines fabricated over drain tank by cutting at an appropriate locations as per the instructions of Engineer-in charge. 2. Removal of old drain tank with approximate weight 12.5 MT, 2.0(Dia.) Mtr. and 6.5(Length) Mtr. from drain tank area to nearby horizontal plane ground area. 2. Shifting of removed old tank with the help of Mobile Crane TIL and Trailer in plant premises as designated by engineer in charge. 3. Erection, alignment of New drain collection tank with approximate weight 12.5 MT over existing foundation in drain tank area. 4. Re-erection of removed structural of approximate platform over new drain tank at same location. Contractor shall arrange trailer of requisite capacity and dimensions in Good Condition with all requisite state transport approvals. All experienced manpower, riggers, D Shackles, Slings shall be arranged by contractor. Mobile crane TIL may be provided by department as per availability of crane free of cost.

(i) Shifting of 1 No. of vertical storage tank(Approximate Weight 4 MT) from heavy water plant,kota premises to heavy water colony premises as per instruction of engineer in charge.(ii) Shifting of 2 No. of vertical clarifiers(Approximate Weight 4 MT each) from heavy water plant,colony(WTP) to heavy water plant,kota premises as per instruction of engineer in charge.Contractor shall arrange trailer of requisite capacity and dimensions in Good Condition with all requisite state transport approvals. All experienced manpower, riggers, D Shackles, Slings shall be arranged by contractor. Mobile crane TIL may be provided by department as per availability of crane free of cost.

Supply and installation of following pipe fittings and valves :

1/2" NB x 800# outside screw and yoke type gate valve with dimension as per ANSI B 16.11 & design as per API 602

1" NB x 2500# outside screw and yoke type gate valve with dimension as per ANSI B 16.11 & design as per API 602

1" NB x 3000# Socket weld type Half Coupling material confirming to A 403 WPL 316L and dimension as per ANSI B 16.11

NW 25 ND 40 Weld Neck Type DIN 2635 flange of material confirming to A 182 F 316L

Supply of structural steel material as per detail Given Below :-

Supply of structural sections like ISMB, ISMC, ASA, MS flat, MS plate of all thickness sizes, for structural plateform fabrication, welding & erection as per site conditions and as per the guidelines of the HWPK Engineer-In Charge.

Supply of Prefabricated MS gratings for structural plateform fabrication, welding & erection as per site conditions,approved Drawing and as per the guidelines of the HWPK Engineer-In Charge.

M/S SONAM ENGINEERING WORKS