NCTPS I SE MI circle Boiler Maintenance Division Annual Overhaul works for the year 24 25 Specification No 125 24 25

Amount

Supply of M.S. Sheet (Iron & Steel): 3.15 mm thick including loading, transportation & unloading.(Supply to the NCTPS stores. The contractor should inspect the site in overhaul to ascertain the actual requirement of LRB wool, Iron & steel material and as per the direction of Engineer in charge the materials will be supplied by TANGEDCO available at stores during execution of works)

Supply of Cold End Diaphragm plate Material: Carbon steel Plate size in mm : (6 x 450 x 3205) One set consist of - 24 Nos

Supply of Cold End Basket Supporting Frame Material: Carbon steel Width:75 mm Welding 6 mm Fillet Full welding

Supply of Cover plate assembly for cold end basket door Model:27 VIM 2000MM

Opening of all manhole doors, and closing of all manhole doors, after completion work including changing of asbestos ropes and clamps in the doors. Charges including Consumables and T&P’s.

Charges for Providing platform and dismantling after completion of work. Including Consumables and T&P’s.

Charges for removal of worn-out radial seal in both cold end and hot end (complete assembly) and re fixing with new HT bolts & nuts and positioning. (Including transporting of new materials from Stores to site and scraps from site to stores). (SINGLE SEALING ARRANGEMENT). Including Consumables and T&P.

Charges for removal of worn-out/damaged bypass seals (complete assembly CE & HE) fixing and positioning properly with new /old seals. (Including transporting of new materials from stores to site and scraps from site to Stores). Including Consumables and T&P’s.

Charges for removal of worn-out axial seal in both cold end and hot end (complete assembly) and re fixing with new HT bolts & nuts and positioning. (Including transporting of new materials from Stores to bite and scraps from site to stores). (SINGLE SEALING ARRANGEMENT). Including Consumables and T&P’s.

Charges for cutting and removal of bypass seal fixing angle and fixing the same /new after carried out rectification works at the centre section fixing plate with correct radius. Including Consumables and T&P’s.

Removal of accumulated ash at centre section connecting plate area of APH “A” side. Including Consumables and T&P’s.

Charges for removal of cold end heating elements from its position, leading to the adjacent area of the Air pre heaters, dry cleaning, high jet pressure water cleaning and then air cleaning and putting back the same/old heating elements. Including Consumables and T&P’s.

Charges for removing the cover of support bearing, draining of lubricating oil from the sump, cleaning, flushing, rinsing and inspection of bearings checking level and refilling with new oil and re packing the covers properly. Including Consumables and T&P’s.

Charges for dismantling cleaning of lub oil cooler nest and filters. Including Consumables and T&P’s.

Charges for assembling of lub oil cooler nest and filters Including Consumables and T&P’s.

Charges for hydraulic testing of the APH Lub oil cooler @ 15 Kg/Cm2 pressure for 30 minutes in the presence of Board Engineer Including Consumables and T&P.

Charges for Dismantling & cleaning the lube oil lines of Guide bearing & Support Bearings with air & steam and reassembling. Including Consumables and T&P’s.

Charges for Removal and refixing of support bearing water shield and air sealing ring. Including Consumables and T&P’s.

Charges for Overhauling of APH lub oil pumps and valves for Support bearing and guide bearing. This work includes Dismantling, cleaning, Inspection of bearings, Gears, internals and replacement of the same if required then reassembling. and alignment works etc including Consumables and T&P’s., oil seals, bearing etc.

Charges for cutting and removing of rigid stoppers checking and correction of rotor levelling, checking and correction of critical distance between guide bearing housing and housing sleeve and fixing, welding the rigid stoppers and provide shim packing in between guide bearing housing and permanent stoppers. Including Consumables and T&P’s.

Charges for Patch up work on the eroded portion of the cold end Diaphragm plate. Including Consumables and T&P’s.

Charges for Complete dismantling of entire APH soot blower system, Fixing new protection cover for the soot blower pipe, Renewal of eroded guard pipe and Renewal of new pipe and reassembling with new soot blower pipe with twin nozzle assembly. a) Overhaul of APH soot blower mechanism including dismantling, changing the bearings, soot blowers spray nozzles, if necessary and changing of lubrication and reassembling etc. Including Consumables and T&P’s.

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 Consumables and T&P’s.

Charges for dismantling of Air motors/inspection and renewal of internals, vanes, bearings and reassembling works. Including Consumables and T&P’s.

Charges Cleaning of steam coil Air pre-heater. Including Consumables and T&P’s.

Fabrication and Erection of Flue gas duct portion and cover plate for metallic expansion joints Style #4 & Style #2 work involves transporting of M.S plates from stores to site, cutting in to required size, leading, lifting, positioning on the eroded contour portions of APH duct area and welding the same, Including Consumables and T&P’s.

Charges for overhauling of eroded / damaged portion of the Air pre heater rotor angle and seating plate of the Bypass seal angle by metal filling & patch welding and correcting to the required radius of both hot & cold ends. Including Consumables and T&P’s.

Removing the existing support bracing pipe assembly of APH flue gas side transporting the new from stores, cutting in to required size leading, lifting, positioning and welding. Including Consumables and T&P’s.

Cutting & removing the damaged / dislocated ribs of cold end baskets seating frame, Straightening the same positioning & welding in position with the frame and refilling of worn out welding for reconditioning in position (12 no seating frames per air pre heater) Including Consumables and T&P’s.

c) Charges for levelling and aligning of the radial sector plates and axial seal plates with respect to the rotor axis. Including Consumables and T&P’s.

Renewal of worn out Multi disc &coupling Bolts. i.e., disconnecting the runner half coupling, removing the worn out multi disc and runner half coupling bolts and reconnecting the runner half coupling and complete aligning works including motor, Consumables and T&P’s.

Charges for Alignment of APH drive motor with speed reducer through fluid coupling. Including Consumables and T&P’s.

Renewal / reconditioning of metallic expansion joints in APH Eco Outlet Size (Style # 4) Work involves arresting the upstream and downstream of duct, cutting and removal of existing eroded cover plate and metallic expansion joints and gauching. Leading, lifting, positioning of new/ old expansion joint, aligning with the duct channel and complete welding. Including Consumables and T&P’s.

Water washing of Air pre heater. Including Consumables and T&P’s.

Charges for Overhauling of cold end heating element door seating flange at the rotor shell and refitting of cold end heating elements doors. Including 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. Including Consumables and T&P’s.

Charges for removal of existing 'T' bars, fixing new / old 'T' bar and adjusting to correct radius and clamping properly. Including Consumables and T&P’s.

Overhauling of Hot end stationary Spool and renewing the retainer ring, Packing rings and etc. Including Consumables and T&P’s.

Arresting air leakage in and around the pinion air seal assembly, air seal assembly cover and patch up, filling weld metal on the eroded portion of the pinion air seal, replacing the carbon ring with tension spring. Including consumables and T&P's.

M/s. KSR Enterprises (BID ID -1095564)