Fabrication and Erection of SS304L Piping Subassemblies and associated structural works

Amount

SS PIPE FABRICATION & ERECTION: Handling, transportation of stainless steel pipes of grade 304L quality (Supplied as Free Issue Material), marking, cutting, fabrication (excluding welding), and surface treatment of pipes as per approved procedure and erection of pipes on fabricated supports at site as per the approved drawings. Sizes of pipes involved ranges from DN 15 to 50 SCH40. (The rate for each meter erected up to pipe size DN 25 shall be considered as one inch metre)

PIPE BUTT WELDING (ER 308L Filler Wire): Preparation of drawings, Gas Tungsten Arc butt welding of stainless steel pipes of grade 304L quality, Sch 40 pipe size DN 15 to DN 50, including hookup joints, using Argon gas for shielding and purging, ER 308L filler wire as consumable, Liquid penetrant examination (LPE) and local passivation of the weld joints as per specifications. (The rate for each butt joint welded up to DN 25 shall be considered as one inch Dia.)

PIPE FILLET WELDING: Gas Tungsten Arc fillet welding of pipe to pipe, pipe sleeves, etc of stainless steel pipe lines, wherever required. Welding shall be carried out using ER308L filler wire with Argon gas for shielding and purging as per specifications. Item rate shall be inclusive of LP examination and local passivation. (The rate for each fillet joint welded up to DN 25 shall be considered as one inch Dia)

SS RECTANGULAR / SQUARE DUCT WORK: Handling, transportation, marking, cutting, bending, forming, including cut outs wherever required, fabrication of duct matching with supports and fixing of 3.00 mm thick stainless steel sheets conforming to AISI 304L quality supplied as free issue material (FIM), surface treatment followed by installation of the same as per approved drawings excluding welding. Measured as the area of sheet / duct actually erected at site.

PLATE WELDING: Gas Tungsten Arc welding of stainless steel plate / sheet / sections of 304L quality of 3mm thick with a) stainless steel strutural member b) Embedded Carbon steel EP plates. Welding shall be carried out using Argon gas for shielding and purging, Liquid penetrant (LP) examination and local passivation of the weld joints as per specifications. Item rate shall be inclusive of LP examination and local passivation. Butt weld joints: Stainless steel to Stainless steel welding using ER308L filler wire.

PLATE WELDING: Gas Tungsten Arc welding of stainless steel plate / sheet / sections of 304L quality of 3mm thick with a) stainless steel strutural member b) Embedded Carbon steel EP plates. Welding shall be carried out using Argon gas for shielding and purging, Liquid penetrant (LP) examination and local passivation of the weld joints as per specifications. Item rate shall be inclusive of LP examination and local passivation. Fillet weld joints: Stainless steel to Stainless steel welding using ER308L filler wire.

PLATE WELDING: Gas Tungsten Arc welding of stainless steel plate / sheet / sections of 304L quality of 3mm thick with a) stainless steel strutural member b) Embedded Carbon steel EP plates. Welding shall be carried out using Argon gas for shielding and purging, Liquid penetrant (LP) examination and local passivation of the weld joints as per specifications. Item rate shall be inclusive of LP examination and local passivation. Fillet weld joints: Stainless steel ISMC to Carbon steel EP dissimilar welding using ER309L filler wire.

NOZZLE FABRICATION AND WELDING: Marking, cutting, drilling of stainless steel pipes of grade 304L quality suplied as free issue materail for the preparation for Nozzle joints as per approved procedure and Gas Tungsten Arc full penetration Nozzle welding using Argon gas for shielding and purging, ER 308L filler wire as consumable, Liquid penetrant (LP) examination and local passivation of the weld joints as per specifications.

Pipe-in-Pipe bend fabrication: Fabrication of stainless steel pipe-in-pipe bends (90 to 150 degree bends) by filling with fresh river sand in annular space between two pipes, closing of annular space and pipe inside separately by using machined SS washer and SS dummy or wooden plug. Fabrication of bend by hydraulic bending machine or any other means as per approved drawing and procedure. Bending procedure shall be dully approved by department in advance. The rate shall include liquid penetrant examination, thickness measurement of pipes before and after bending at bend portion using ultrasonic thickness measurement gauge and local passivation as per approved procedure. As per specification Bend radius shall be 5D of pipe DN. For payment size of outside pipe will be considered. Please see the relevant clause Section-V of tender document. Sizes of pipe involved are 15 NB to 25 NB.

Handling, transportation, surface treatment, fabrication and erection of end closure / dummy plate for pipe / annular pipe made from free issue material (FIM) of 3 to 6mm thick SS304L plate / sheet and fillet / Groove fillet welding with the SS304L pipe ends. Welding shall be carreid out using GTAW process with argon gas for shielding & purging followed by LPE and local passivation of weld joints.

SS SPACER WIRE (SUPPLY): Supply, handling, transportation, surface treatment, fabrication and erection of spacer wires made from AISI 304L / 308L IGC Pr-C as per Drawing. The item rate includes i) Supply the Stainless Steel 304L / 308L quality spacer wire of dia. 2 & 3mm as per drawing ii) Fabrication as per approved drawings. iii) Tack / stitch welding of spacer wire using GTAW process with argon gas for shielding using ER 308L filler wire, followed by site installation as per approved procedure and drawing. iv) All the weld joints shall be subjected to local passivated as per approved procedure v) all the material shall be subjected to surface treatment as per approved procedure prior to erection at site.

SS STRUCTURAL MEMBER FABRICATION (FIM): Handling, transportation, surface treatment, fabrication and erection of supports/structural members/end closures plate made from AISI 304L stainless steel plates supplied by Department as Free issue material (FIM) as per Drawing. The item rate includes i) Collecting the Stainless Steel 304L quality materials such as plates/sheets of thickness 1.6 mm to 6mm as per drawing from department. ii) Forming/Fabrication/drilling of holes of stainless steel members like ISMC 100x50x3mm channels, ISA 40x40x3mm angles, Half-cut sleeves, End closure plate for ducts/trays, clamps, etc of various sizes as required as per approved drawings, LPE and local passivation of formed area. iii) Fabrication and erection of supports/structural members/Half-cut sleeves/end closure plates/clamps as per approved drawings and welding of structural members/half-cut sleeves/end closure/clamps using GTAW process with argon gas for shielding using ER 308L filler wire, followed by site installation as per approved procedure and drawing. iv) All the weld joints shall be subjected to LPE on final pass and local passivated as per approved procedure v) all the structural members shall be subjected to surface treatment as per approved procedure prior to erection at site.

SS STRUCTURAL MEMBER FABRICATION (SUPPLY)): Supply, handling, transportation, surface treatment, fabrication, forming and erection of clamps made from AISI 304L stainless steel plates as per Drawing. The item rate includes i) Supply of Stainless Steel 304L quality 1.6mm thick plates/sheets as per drawing ii) Forming/Fabrication of stainless steel clamps of various sizes as required as per approved drawings, LPE and local passivation of formed area. iii) Fabrication and erection of clamps as per approved drawings and welding of clamps using GTAW process with argon gas for shielding using ER 308L filler wire, followed by site installation as per approved procedure and drawing. iv) All the weld joints shall be subjected to LPE on final pass and local passivated as per approved procedure v) all the clamps shall be subjected to surface treatment as per approved procedure prior to erection at site.

PRESSURE TESTING: Pneumatic testing of pipe lines as per specifications given in the tender. (Each Line from start to end is considered as one number)

RADIOGRAPHY EXAMINATION: X-ray examination of butt welded pipe joints as per the technical specifications of the tender using conventional X-ray machine as per approved procedure. The supply of X-ray machine, film, dark room facility, consumables for film washing, skilled and unskilled personnel are under the scope of the contractor. DN 15 to 50 SCH40 pipe joints.

CS STRUCTURAL SUPPORT (SUPPLY): General structural fabrication including supply of carbon steel angles, channels, I-beams, plates, etc (Material conforming to IS 2062), inclusive of handling, transportation, cutting, fabrication of support structures, MMA welding using E7018 electrodes of approved makes, LP examination of final weld pass after thorough cleaning, site installation and painting (one coat of primer and two coats of enamel painting of approved make and colour) as appropriate. The supply shall include sections like channel, angles, I-beam and plates as required for use as base plates or pad plates of appropriate thickness mentioned in drawing. This includes the provision of necessary scaffolding to carryout the work.

ANCHOR FASTENERS: Supply and fixing the HILTI/Fisher anchor fasteners of size M20 mm x 150 mm along with bolts and washers for fixing the carbon steel base plates for providing Duct / tray supports where ever embedded plates are not available/provided.

Sri Venkateswaraa Engineering

SAKTHI ENGINEERS

WELTECH ENGINEERS

SP Enterprises