NCTPS I SE MI circle Boiler Maintenance Division Annual Maintenance work for the year 26 27 Specification No 294 25 26

Lightly Resin Bonded Wool Mattresses 75 MM thick confirming to IS 8183 of latest issue of with ½” x 23 swg wire netting at single side., Bulk density = 150 Kg/Cu.m, Size : 1.52 m x1.22 m x 75 mm thick packed in HDPE bags, including P & F, F&I and unloading charges.(Supply to the NCTPS stores. The contractor should inspect the site in overhaul to ascertain the actual requirement of LRB wool material and as per the direction of Engineer in charge the materials will be supplied by TNPGCL available at stores during execution of works).

MS Square plate 70 x 70 x 1.5 mm (Supply to the NCTPS stores. The contractor should inspect the site in overhaul to ascertain the actual requirement of LRB wool material and as per the direction of Engineer in charge the materials will be supplied by TNPGCL available at stores during execution of works).

GI Holding strip 65 x 652 x 2mm(Supply to the NCTPS stores. The contractor should inspect the site in overhaul to ascertain the actual requirement of LRB wool material and as per the direction of Engineer in charge the materials will be supplied by TNPGCL available at stores during execution of works).

MS Insulation pin Size: 6mm x 225mm length (Supply to the NCTPS stores. The contractor should inspect the site in overhaul to ascertain the actual requirement of LRB wool material and as per the direction of Engineer in charge the materials will be supplied by TNPGCL available at stores during execution of works).

MS cladding support channel for boiler (Supply to the NCTPS stores. The contractor should inspect the site in overhaul to ascertain the actual requirement of LRB wool material and as per the direction of Engineer in charge the materials will be supplied by TNPGCL available at stores during execution of works).

GI sheet of size: 2500 X 1000 mm, zinc coating: 180 gms /Sq.mtr, thickness of GI sheet: 0.63mm (24G) IS standard: IS 277, class -VI (Supply to the NCTPS stores. The contractor should inspect the site in overhaul to ascertain the actual requirement of LRB wool material and as per the direction of Engineer in charge the materials will be supplied by TNPGCL available at stores during execution of works).

Providing temporary scaffolding for positioning, aligning and welding of scaffolding materials & dismantling the temporary scaffolding after completion of works. Including consumables and T&P’s.

This work involves removal of existing insulation and re fixing with new insulation material in Boiler pressure parts, APH & ducts upto 75 mm thick, valves, oil lines, Steam drain lines etc., Charges for 75mm thick first layer. Including consumables and T&P’s.

Fixing of Insulation:This work involves removal of existing insulation and re fixing with new insulation material in Boiler pressure parts upto 150 mm thick, Boiler,First pass & second pass, hopper area e.t.c., Charges for 150 mm thick first layer+ Second layer. Including consumables and T&P’s.

Fixing of Insulation: This work involves removal of existing insulation and re fixing with new insulation material in Boiler pressure parts upto 220 mm thick,Boiler critical pipelines,HRH,CRH,MS, Below 52 Metre area etc., Charges for 220mm thick first layer+ Second layer+ Third layer. Including consumables and T&P’s.

Removal and Relaying of MS / GI corrugated cladding Sheets: This work involves Cutting and removal of the existing M.S / GI Corrugated sheets, fixing of new/old sheets, welding with channel of boiler structure. Charges inclusive of consumables and hire charges for T&P’s.

PLASTERING WORK: Mixing of cement pluff mixture and applying the plastering over the insulation done in steam lines like M.S,HRH,CRH, Burner corner, IBD and CBD tank etc., charges inclusive of cost of CAT 9 self setting cement puff, Consumables and T&P’s.

Fixing of G.I.corrugated /plain sheet with new/old over insulation done in Boiler pressure parts, critical pipe lines, burners, valves, oil lines, ducts, APH & pent house etc.,charges inclusive of Consumables and T&P’s.

Arresting of G.I. Sheet with M.S fin plates fixed by welding joints at boiler structure I beams and channels to arrest the G.I. Sheet in place and to avoid air ingression / ash leakage. Inclusive of Consumables and T&P’s.

Fabrication and Erection of support channel for providing cladding support for holding insulation and GI Sheet, MS mesh MS support etc, fabrication, lifting, positioning, aligning and welding as directed by the field engineers. Charges including of paints,consumables tools and plants and drawal of materials from stores etc.

Complete removal of the damaged wool and other items. This work involves complete removal of the damaged wool from pipes, tubes, wall panels and removing scale, rust thoroughly & Cleaning of above surfaces gathering removed waster wool, debris and other unwanted materials from the respective floor to zero-meter elevation and transporting the material for away from the site as per the engineer in charge instruction and location. (Inclusive of vehicles hire charges, consumables. T&P’s etc.)

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