Erection of Tanks, Fabrication and erection of SS304L Pipe-in-Pipe Piping and associated structural works for HLW Trench from WTF to WMP of FRFCF Project

Amount

SS Pipe Fabrication & Erection (FIM):Handling, transportation of stainless steel pipes, fittings, etc. 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 at site as per the approved drawings. Sizes of pipes involved ranges from 8NB to 50 NB SCH 10 or 40. (The rate for each meter erected up to pipe size 25NB shall be considered as one inch metre)

Pipe Butt Welding (ER308L Filler Wire): Preparation of drawings, Gas Tungsten Arc butt welding of stainless steel pipes of grade 304L quality, Sch 10 or 40 pipe size of 8NB to 50NB, 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 25NB shall be considered as one inch Dia.)

Pipe Fillet Welding (ER308L Filler Wire): Gas Tungsten Arc fillet welding of pipe sleeves and 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 25NB shall be considered as one inch Dia)

SS Rectangular / Square Duct Work (FIM): Handling, transportation, marking, cutting, trimming, bending, forming, drilling, including cut outs / circular opening wherever required, fabrication of duct matching with supports and fixing of 3mm 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 (Butt Weld): Gas Tungsten Arc butt welding of stainless steel plate / sheet / sections / duct of 304L quality of 3mm to 6mm thick with another stainless steel plate / sheet / sections / duct of 304L quality. 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. Stainless steel to Stainless steel welding using ER308L filler wire.

Plate Welding (Fillet Weld): Gas Tungsten Arc Fillet Welding of stainless steel plate/sheet/sections of 304L quality of 3 to 6mm thick with another stainless steel plate / sheet / sections / pipe support plate of 304L quality. 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. Stainless steel to Stainless steel welding using ER308L filler wire.

Dissimilar Plate Welding (Fillet Weld of SS to CS): Gas Tungsten Arc fillet welding of Stainless steel ISMC to Carbon steel EP / shim plate, etc. Welding shall be carried out using Argon gas for shielding and purging, Liquid penetrant (LP) examination of the weld joints as per specifications. Item rate shall be inclusive of LP examination and DM water cleaning. Stainless steel to Carbon steel dissimilar welding using ER309L filler wire.

Nozzle Fabrication and Welding (Air sniffing line & air injection line (8NB) to outer pipe (40NB) and sub-header): Marking, cutting, drilling of stainless steel pipes of grade 304L quality supplied as free issue material (FIM) for the preparation of 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 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 outer pipe will be considered. Please see the relevant clause Section-V of tender document. Sizes of pipe involved are 25 NB (inner pipe) & 40 NB (outer pipe).

Pipe bending: Fabrication of stainless steel pipe bends using hydraulic bending machine or any other means as per duly approved procedure. The rate shall include liquid penetrant examination, thickness measurement at bend portion using ultrasonic thickness measurement gauge and local passivation as per specification. Bend radius shall be 5D of pipe NB. Ultrasonic thickness gauge shall be dully approved by Engineer In Charge. Pipe size ranging from 8NB to 40NB. Pipes ≤1" shall be considered as 1" bend.

End Cap (Butt Weld Fittings supply): Supply, handling, transportation, fabrication, drilling, machining, surface treatment, and erection of hollow end cap (seamless) for outer pipe (40NB SCH10) made from SS304L as per ASME B16.9 & ASTM A403.

Pipe End Closure: Handling, transportation, surface treatment, fabrication and erection of temporary blinds / end closure / dummy plate made from free issue material (FIM) using 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 / ER308L as per drawing. The item rate includes i) Supply of Stainless Steel 304L / ER308L quality spacer wire of dia. 2.4 to 3.2mm 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, fabrication, surface treatment and erection of pipe supports / C-Channel structural members / end closures plates / Half-cut pipe sleeves, etc 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 upto 6mm as per drawing from department stores. ii) Forming / Fabrication / cutting / drilling or punching of holes, etc in stainless steel members like C-channels , angles, pipe support plate with half cut pipe slot, Half-cut pipe sleeves, End closure plate for ducts & gutters, clamps, etc of various sizes as required as per approved drawings, LPE and local passivation of formed area. iii) Fabrication and erection of pipe supports/structural members/Half-cut sleeves/end closure plates/clamps, etc as per approved drawings and all associated weldings of structural members/ half-cut sleeves/ duct end closures/ pipe support plates/ clamps, etc 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 item made from AISI 304L stainless steel plates as per Drawing. The item rate includes i) Supply of Stainless Steel 304L quality from 1.6mm upto 40mm thick plates/sheets as per drawing ii) Forming/Fabrication of stainless steel items of various sizes as required as per approved drawings, LPE and local passivation of formed area. iii) Fabrication and erection of items as per approved drawings and all associated weldings 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 items 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. Inner and outer pipe line testing separately. (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 Work (Supply): General structural fabrication including supply of carbon steel angles, channels, I-beams, plates, etc (Material conforming to IS 2062 E250BR grade), inclusive of handling, transportation, cutting, drilling, fabrication of support structures or base plates or pad plates or anchore plate or shim plates, etc, 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 of appropriate thickness mentioned in drawing. This includes the provision of necessary scaffolding to carryout the work.

Painting of CS EP / Plates: Surface cleaning, Chipping of concrete if any, grinding, emery / sandpaper, rust removal. one coat of primer and two or more coats of enamel painting of approved make and colour of 150 micron dry film thickness.

Supply, Erection & dismantling of CS Structure for Temporary shed work above trench: Supply, handling, transportation, fabrication, SMAW welding (E7018) and erection of dismantable type CS structural members (IS2062) [steel hollow sections or tubes viz square / rectangular / circular pipes (40*40*2.5 mm or equivalent) etc as per relevant specifications] with painting (one coat of primer and two coats of enamel painting of approved make and colour). The work includes dismantling of temporary structure after the completion of piping works, handling, transportation and delivery of item to FRFCF stores.

Supply, erection & dismantling of Roofing sheet for Temporary shed work above trenches: Supply, handling, transportation, fabrication, erection of prepainted GI corrugated sheet or Al-Zn colour coated sheet of 0.30 to 0.35mm thk above the MS Structure for temporary shed work. This includes sheet fixing, screwing with the hollow section / tubes and all associated works including consumables. The work includes dismantling of roofing sheet after the completion of piping works, handling, transportation and delivery of item to FRFCF stores.

Anchor Fasteners: Supply and fixing of Heavy-Duty Wedge Anchor HSL4-G HILTI or equivalent make anchor fasteners of size M20 mm x 205mm along with nut and washer for fixing the CS or SS base plates for erecting Duct / structural member / piping supports, etc. wherever required. Rebar mapping, drilling or core cutting for fixing anchor fasteners are in the scope of contractor.

Providing and constructing at all floors and lifts 115mm thick brick work in cement mortar 1:4 using well burnt bricks including curing, racking out the joint on both faces, etc. complete as per specification and as directed by the Engineer-in-Charge.

Providing plastering in cement mortar 1:4, 15mm, thick at all elevations with 2% of water proofing compound or as per manufactures specification, 'lmpermo' or approved equivalent make including racking of concrete surfaces with pointed tool, scaffolding, finishing, curing, all as per specifications.

Dismantling brick works at all levels by manually / by mechanical including Cutting and stacking of steel reinforcement bars and disposal of unserviceable materials within 50m distance, labour, tools required etc. complete in all respects as per specifications and directed by the Engineer-in-charge.

Tank Erection: Handling, Transportation, shifting of SS Tanks from Storage Yard to WMP Plant, loading, unloading, lowering to EL(-) 6.0 m Lvl, Skidding, cleaning of CS EP and tank saddle support base plate. Cutting, preparation & introducing shim from FIM plates of various sizes & thickness in gaps if any, Erection & Alignment of the following tanks as per the detailed scope of work given in Technical specification of tender document.

Tank erection in UG BAY-1, 2 & 3 1.6m dia x 4.45 m long and 6 Cu.Mtrs with weight of 3MT approx. (Total 6 tanks)

Tank erection in UG Cells 1.65m dia x 3.66m long and 5 Cu.Mtrs with weight of 3MT approx. (Total 5 tanks)

Surface Treatment of Stored Tanks: Handling, lifting & transportation to convenient location using hydra crane, surface preparation, pre-cleaning, degreasing, acid cleaning by continuous swabbing or pouring method and preservation or covering of SS Tanks as per technical specification. This includes identifying of surface contaminations like corrosion, rust, dirt, etc and cleaning using aluminum oxide sander wheel / emery paper / SS wire brush, etc without reduction of base material thickness. The necessary SS tray or tarpaulin sheet for collection of acid, DM water for washing and its safe disposal are in the scope of contrator.

1.6 m dia x 4.45 m long of surface area 30 Sq.m approx. (Total 6 tanks)

1.65 m dia x 3.66 m long of surface area 27 Sq.m approx. (Total 5 tanks)

Sadddle support welding: GTA Welding (Fillet weld) of SS 304L 16mm thk base plate of Tank to the embedded CS EP plate using ER 309L filler wire. Welding shall be carried out with Argon for shielding followed by LP examination (LPE) for root & Final pass of weld joints and DM water cleaning. Rate shall be inclusive of LPE and DM water cleaning of weld joints. Fillet weld Leg Length upto 13mm.

SS Supports Fabrication for tanks using Free Issue Material (FIM): Handling, transportation, marking, cutting, surface treatment, fabrication and erection of Supports made from AISI 304L 10mm, 20mm, 25mm, 40mm thk, etc SS304L plates etc supplied by Department as FIM as per Drawing . The item rate includes i) Collecting the Stainless Steel 304L quality materials from department. ii) Fabrication of supports as per the approved dwg which involves water jet / plasma cutting & 10mm Fillet welding using GTAW process with argon gas for shielding using ER 308L filler wire, followed by site installation using ER309L filler wire GTA welding as per approved procedure and drawing. iii) All the weld joints shall be subjected to LPE on root & final pass and local passivation as per approved procedure iv) All the supports fabricated at shop shall be subjected to surface treatment as per approved procedure prior to erection at site.

Vacuum techniques PVt Ltd (BID ID -3163742)