MTPS I CA CWS I Cooling Tower I Overhauling of Flow Control Valves and including reconditioning of worn out spares during AOH 2024 2025 of Unit I

Amount

Charges for reconditioning of worn-out Flow Control Valve (FCV) spares released from Cooling Tower –I at outside workshop, boring of worn-out GI Disc, fabrication and assembling of M.S. flange on CI Disc, molding of new CI guide bush, boring and thread cutting on the inner surface of the bush to suit with the existing S.S. Stem. Reconditioning of worn-out S.S. Stem by thread cleaning and provide S.S. stem end nut and two Nos plate washers per stem, including the transporting charges.

Charges for removing the existing damaged Nitril rubber from the M. S Flange in Cooling Tower. Cleaning and sand blasting on both the surface for Nitril rubber impregnation, moulding the Nitril rubber over the flange for 5 mm thick on each side ( the size of the flange to be impregnated is OD-640mm; ID-450 mm) trimming and steam vulcanizing ,including the cost of Nitril rubber, adhesive and also charges including transporting charges of worn- out spares from MTPS to out side work shop and return back to MTPS.

Charges for dismantling of inspection doors provided at Flow Control Valve assembly casing. Dismantling of Flow control valve assembly (about 300 kg weight) from taping pipe flange of hot water header line. Reassembling the same by using Rubber gasket properly without water leakage. Open/close operation checking works.

Charges for Dismantling of Flow control valve spares from Flow Control Valve assembly, cleaning, inspection and renewal of worn-out spares like guide bush, stem, CI disc, lock nut, locking bar and operating handle etc. and reassembling the Flow Control Valve assembly.

Charges for reconditioning Flow control valve casing for fixing inspection doors by Drilling and removal of existing 8 Nos of eroded M10 / M12 stud, making 8 Nos of new M 10 / M12 thread on the valve body by using tap set.

Charges for leading, lifting, positioning and inserting the stop log gate in the cold water Outlet canal of CT to facilitate the cold water dewatering work. After completion of dewatering work removing, leading and placing the stop log gate on the floor.

Charges for dismantling the GI casing of FC valve to facilitate the OH of FCV & renewal of nozzles etc., and assembling back after completion of work in CT-I.

Charges for Petty Iron Works for Fabrication of M.S Flow control valve inspection door.(Size 300mmx270mmx10mmThick and Dia 12mm x 8Nos Holes) and replacement of damaged / worn out MS angle for FCV casing frame. (Required M.S Plate & M.S angle will be supplied by TANGEDCO).

Charges for removing the rust and old paint from the Flow control valve casing along with tapping pipe.

Painting charges for one coat red oxide primer and two coats of sea green paint on Flow Control Valve casing along with tapping pipe and casing frame including cleaning the surface.

Charges for cleaning and painting with of epoxy red oxide primer and Two coats of epoxy high build coal tar in inner surface of Flow Control valve taping pipe.

Cost of Neoprene Rubber(Black) Gasket ,size,1M X 2 M X5 MM thick for SL.No.3

Cost of Epoxy red oxide primer for SL.No.10&11.

Cost of Epoxy Sea Green paint for SL.No.10

Cost of Epoxy Thinner for SL.No.10&11

Cost of Coal Tar Black Paint for Sl.No.11

Cost of Material charges for C.I guide bush, M.S. Flange, S.S. Stem end lock nut and plate washers including transporting charges for SL.No.1

Cost of Nitril rubber of 1.25 kg required for 1Nos of disc for SL.No.2

Charges for Nitril rubber impregnation, moulding and covering 5 mm thick on both faces of M.S. Flange, trimming and steam vulcanizing for 1 Nos for SL.No.2

Cost of HT stud, Grade 10.9 of size M 12 x 75 mm , with 2 Nuts and 2 washers (Full Thread) for Sl.No.5

Cost of G.I. bolt M 25 x 125 mm half thread with one nut and two washers for FCV casing

Charges for loading and transporting the M.S Plate material from site to local workshop and back to site after completing the work for Sl.No.8

Cost of cutting Gas for Sl.No.8

Cost of Consumable and T&P for SL.No.1 to 7

SS ENGINEERING CONTRACTOR