NCTPS II MI Circle 600 MW Boiler Unit II Annual Overhauling of HP LP valves

Amount

Charges for dismantling, inspection, rectification of defects if any, lapping of valve seat and disc, renewal of sealing rings, gland packing, flange gaskets, and bonnet gasket, cleaning all parts, inspection of drive bush, bearings, etc. and renewing if necessary and assembling of valves of size NB -300 mm valves and NRV of class 800/ 1500/2500.

Charges for dismantling, inspection, rectification of defects if any, lapping of valve seat and disc, renewal of sealing rings, gland packing, flange gaskets, and bonnet gasket, cleaning all parts, inspection of drive bush, bearings, etc. and renewing if necessary and assembling of valves of size NB 200mm-250mm valves and NRV of class 800/ 1500/2500.

Charges for dismantling, inspection, rectification of defects if any, lapping of valve seat and disc, renewal of sealing rings, gland packing, flange gaskets, and bonnet gasket, cleaning all parts, inspection of drive bush, bearings, etc. and renewing if necessary and assembling of valves of size NB 65 MM-150 mm TOA and ‘Y’ type valve and NRV’s of class 800/ 1500/2500.

Charges for dismantling, inspection, rectification of defects if any, lapping of valve seat and disc, renewal of sealing rings, gland packing, flange gaskets, and bonnet gasket, cleaning all parts, inspection of drive bush, bearings, etc. and renewing if necessary and assembling of valves of size NB 1.5”& 2” valves of class 800/1500/2500.

Charges for dismantling, inspection, rectification of defects if any, lapping of valve seat and disc, renewal of sealing rings, gland packing, flange gaskets, and bonnet gasket, cleaning all parts, inspection of drive bush, bearings, etc. and renewing if necessary and assembling of valves of size NB : 1”,1/2”,3/8” & 15 mm valves of class 800/1500/2500.

Charges for cleaning, inspection & checking of cracks if any in the valve bonnet, Seat & disc of size NB -300 mm valves and NRV of class 800/ 1500/2500 by applying Die penetration cleaner, penetrate & developer and welding the crack including DPT Kit in contractor scope.

Charges for cutting & removing of worn-out corroded & punctured / damaged drain pipe lines & IBR bends of OD 33.5 - 65 mm and cutting new ones to the required length, preparing edges by grinding, aligning & welding with the existing pipes by IBR welder.(Bends & pipes will be given by board at free of cost) charges including consumables and T & P’s

Charges for cutting the existing defective Valve in Main steam bypass pipeline of size OD 88.9 x 21 mm thick to fix a new valve. This work involves cutting, edge preparation by grinding after moving to the required position, holding, checking alignment in the required pipeline.

Charges for welding the new Valve in Main steam bypass pipeline of size OD 88.9 x 21 mm thick to fix a new valve.This work involves cutting, edge preparation by grinding after moving to the required position, holding, checking alignment in the required pipeline. Charges including preheating and post weld heat treatment (Stress Relieving).

Charges for welding the new reducer for MSV Bypass valve 5 & 6 in pipeline size OD 88.9 x 21 mm thick to fix a new valve.This work involves cutting, edge preparation by grinding after moving to the required position, holding, checking alignment in the required pipeline

Charges for drawl of new 80 NB gate Valve from NCTPS - II stores and transportation to boiler floor 72 mtr area through lifting, leading and devoluting the defective valve to NCTPS - II stores.

Reconditioing of defective in ASV21 valve (200NB,2750 SPL). Bonnet including measuring the depth of crack in gland packing seating area in bonnet, machining the gland packing packing seating area upto the depth of 3mm higher than the crack depth for material filling and better bonding with the parent material filling and better bonding with the parent material, preheating the bonnet before filling the material by welding,filling the material layer by layer on machined area of the bonnet by welding for the required dimension by giving the clearance for final machining. The rough machining in lathe and final machining in gland packing seating area of the bonnet for required dimension after completion of material fillingby welding,conducting UT test to ensure the bonding between welding material with parent material.

ferrofabs (BID ID -1067817)