NCTPS II 600 MW M I Boiler Maintenance Division Unit II Annual overhaul of Air Pre Heater 2B pass

Amount

Charges for checking and cleaning of APH main gear drive unit including decoupling of APH drive from motor, dismantling of fluid coupling, draining of gear box lube oil from gear box, opening of gear box inspection doors and bottom pinion door, cleaning, inspection and Checking of all components inside the gear box and pinion, checking the tapper lock bush, root gap and bottom gap of pinion and pin rack, and grinding the bur projected on bottom surface of the pinion and renewal of lubricant oils and assembly the same. Including cost of consumables and T&P’s.

Charges for checking of Guide bearing, the work includes draining of lube oil from bearing, removal of lube oil inlet and outlet pipe lines from guide bearing housing, removal of guide bearing housing cover, checking and correcting the guide bearing level, providing necessary lock cleaning and flushing of guide bearing, inspection of guide bearing, checking and correcting the level of guide bearing and renewal of new oil and assembly the same including cost of consumables and T & P’s etc.

Charges for dismantling the APH lube oil coolers from bed, removing the internal copper tube assembly, cleaning, servicing, checking and plugging the defective tubes and testing of cooler by hydraulic testing method and reassembling. Including cost of consumables and T&P’s.

Charges for complete overhauling of manhole doors. Including cost of consumables and hire charges for T&P’s.

Charges for providing of scaffolding / temporary platform below the APH inside primary, secondary air duct, flue gas duct side of the APH for renewal of rotor angle, 'T' bar, By pass & CE radial seal setting and removal of scaffolding after completion of renewal work. Including cost of consumables and T&P’s.

Charges for removing the cover of support bearing, cleaning of sump, flushing, rinsing, inspection of internals, overhauling of lubricating lines, checking support bearing levels and providing covers etc in A pass. Including cost of consumables & hire Charges for T & P's.

Charges for checking the rotor level by master level and correcting by loosening / tightening of rotor lock bolt, further providing necessary locking arrangements for rotor, alignment of radial sector plates on both hot and cold end sides and setting of seal clearance by loosening of all radial and By pass seals,fixing of straight edge, removing the bolts and lock nuts By gas cutting, renewal of worn out and damaged radial and by pass seals and refixing of all seals and setting the required seal clearance and tack welding of sector plates & final alignment including cost of consumables and T&P’s.

Charges for loosening and dismantling the cold end / hot end all axial seals, removing the bolts and lock nuts by gas cutting & adjusting the Axial seal plate, the gap between Axial seal plate to sector plate, renewal of worn out and damaged axial seals and refixing of all seals and setting the required seal clearance and tack welding of sector plates and final alignment including cost of consumables and T&P’s

Charges for lifting of hot end heating element (850mm) baskets by providing lifting arrangements, water washing of the baskets with water & air blowing to remove chocking and refixing in position inside the APH compartment including cost of consumables and T&P’s.

Charges for water washing of the Hot Intermediate Baskets (850 mm) with water wash and air blowing to remove chocking in position inside the compartment including cost of consumables and T&P’s.

Charges for withdrawing, lifting of cold end heating element basket by providing Necessary pulling & lifting arrangements, water washing & air blowing the baskets by keeping outside the APH to remove the Chocking, lifting, aligning, placing in Position inside the APH compartments including cost of consumables and T&P’s.

Charges for removal of fluid coupling, half multi disc, out put half coupling, damaged worn-out oil seals from the APH gear box and fixing of new oil seal and assembling of all dismantled components. Including cost of consumables and T&P’s.

Charges for removal of coupling half multi disc oil seals, damaged worn-out overrunning clutch/shaft of APH for the main gear box fixing of new or overhauled clutch/reconditioned shaft, assembling of all dismantled components, aligning, commissioning charges inclusive of consumables and T&P’S.

Charges for removal and refixing of support bearing water shield and air sealing ring including cost of consumables & T & P’s.

Charges for reconditioning of the sector plate surfaces by Grinding the high spots & burrs, building of metal by welding in dents and then grinding to get plain surface keeping in position inside the Air Pre Heater. Including cost of consumables and T&P’s.

Charges for Complete overhaul of APH soot blower gear box. Including cost of oil seal & bearings, consumables and T&P’s.

Charges for chipping, breaking and removing of refractory super ceramic packing, graphite rope of Stationary spool retainer ring, dismantling & removal of worn out sealing ring cover cutting, machining fixing new sealing ring Welding grinding, reconditioning of Stationary spool retainer ring in Worn-out portions, reassemble of all Components cutting bending, fabrication & Fixing of guide bearing oil flow Inspection door & breather in cover.

Charges for erection of high pressure capacity booster pump / jet pump @ 100Ksc discharge pressure, drive motor , electrical push button and its accessories in Unit I boiler for Airpreheater water washing of Cold end baskets, Hot end baskets and hot intermediate baskets including necessary suction & discharge lines and isolation valves. After completion of Airpreheater water washing the same will be dismantled and returned.

Charges for removal of accumulated ash in ECO outlet to APH inlet area, centre section area, APH inner casing area, SCAPH area of APH A side.

Charges for dismantling of Air motors / inspection the lubricating oil for internals, vanes, bearings and reassembling works. Including cost of consumables and T&P’s.

Overhauling of APH lub oil pumps and its valves for support bearing and guide bearing. Including cost of consumables and T&P’s.

Cutting and removing the damaged / dislocated ribs of cold end baskets, seating frame, straightening the same positioning and welding in position with the frame and refilling of worn out welding for reconditioning in position (24 Nos seating frames per Air Pre Heater).

Charges for cleaning, complete inspection and water washing of SCAPH A pass and attending minor defects if any. Including cost of consumables and T&P’s.

Charges for cleaning & painting of two coats of enamel paint over Gearbox Drive, Guide bearing & Support bearing Lube oil system and its structures. Including cost of paint, labour, consumables and T&Ps.

Consumables for overhauling of APH - Door rope 20mm square size

Consumables for overhauling of APH - Oil seals for gear box cover

Consumables for overhauling of APH - Kawool blanket super ceramic fibre blankets

Consumables for overhauling of APH - Special type 'O' ring for LOP cooler

M/s. KSR Enterprises (BID ID -1068641)