NCTPS I SE MI circle Turbine Maintenance Division Annual Maintenance work for the year 25 26 Specification No 277 24 25

Amount

Charges for periodical cleaning of centrifuge of MOT in Unit-I, Unit-II and Unit-III to remove the sediments/sledge by dismantling of bowl, disc stacks, filters, cleaning them by diesel, air washing and assembling the same in the sequence and normalizing the system and cleaning of spillage oil in and around the centrifuge floor area etc., attending minor periodical maintenance works if any, including the cost of consumables and hire charges for T&P's.

Charges for cleaning of duplex filter elements by draining of oil from filter cartridge, removing of the top cover, lifting out the filter element, cleaning the filter element with diesel, air washing and putting back the filter element and fitting the filter and tightening the same in all the three units, including the cost of consumables and hire charges for T&Ps.

Charges for superficial cleaning of turbine auxiliaries such as HP/LP governing racks, bearing pedestals, HP/LP bypass system valves, HP/IP control valves, stop valves, MOT outer surface, MAL drain valves, MAW valves, outer surface of all steam lines and cleaning of leakages oil from MOT coolers, oil conditioners, OVEF and its connecting pipe lines, oil drain lines and including drawal of oil barrels from stores to MOT for topping up of oil, shaft lift checking and hand barring operation to bring the set on turning gear, including the cost of consumables and hire charges for T&Ps.

Charges for attending slothful Pilot valves in HPCV-I & II, IPCV-I & II and its damping device during any shutdown/breakdown period by dismantling of the internal spares of pilot valves, cleaning the spares and reassembling the same, including the cost of consumables and hire charges for T&P's.

Charges for attending slothful Pilot valves in LPBP and its damping device during any shutdown/ breakdown period by dismantling of the internal spares of spoilt valves, cleaning the spares and reassembling the same, including the cost of consumables and hire charges for T&P's.

Charges for attending slothful Pilot valves in CRH NRV, LPBP water injection, test valve of HP & IP stop valve, extraction NRV test valve during any shutdown/ breakdown period by inspection, cleaning the pilot valve and reassembling the same, including the cost of consumables and hire charges for T&Ps.

Charges for cleaning of governing rack plate type filters during any shutdown/breakdown period by draining of oil, inspection, cleaning the filter, renewal of ‘O’ rings and reassembling the same, including the cost of consumables and hire charges for T&Ps.

Charges for checking and topping up of N2 gas pressure in accumulators of HPBP system by isolating the accumulator and top up of N2 gas to the required pressure, including the cost of consumables and hire charges for T&P's.

Charges for checking and replacement of defective/ punctured bladder of accumulator in HPBP oil unit by removal of defective bladder from accumulator bottle, pushing bladder into accumulator bottle with intact position, fitting and tightening the securing nut on top of the accumulator, including the cost of consumables and hire charges for T&P's.

Charges for welding joint works for 1” dia pipe by cutting of old damaged parts of high pressure steam line pipes, valves and bends; edge preparation, fitting and re-welding with new/old pipes or new/old valves and fittings by IBR certified welder. This includes the cost of special welding electrodes, filler rods, all kinds of consumables required for the works, including the cost of consumables and hire charges for T&P's.

Charges for attending defect in jammed electrical operated actuators in steam valves in turbine area by complete dismantling of actuator internals, complete inspection, cleaning of individual components rectification of defects if any and reassembling of all the components, setting limit switch, including of oil drains and topping up, cost of consumables and hire charges for T&P's.

Charges for attending defect in jammed single / three stage angled drain valves by complete dismantling of valve internal components, inspection, cleaning, lapping the valve disc and seating area, replacing of gland packing, sealing rings, bonnet gaskets and reassembling of all the parts in the correct sequence and to ensure the manual operation of valve open and close operation of the valve position, including the cost of gland packings, gaskets, consumables and hire charges for T&Ps.

Charges for replacement of punctured atmospheric relief diaphragm in LP turbine exhaust wood by dismantling the punchered diaphragm form LP Turbine exhaust wood top, reversing the removal flange, rupturing disc, fabricating the lead sheet for required size and assembling the fabricated lead sheet in repture disc with proper position. After replacement of relief diaphragm and ensure no air ingress in to LP turbine exhaust wood, including cost of consumables and hire charges for T&P's.

Charges for attending defect in MOT Alfa Laval Centrifuge by dismantling the oil pump, inspection, checking of run out in the vertical and horizontal shaft, checking and replacing of all worn out bearings, oil seals, ‘O’ rings, cleaning, including the cost of consumables and hire charges for T&P's.

Charges for attending defect in the HPBP spray valves BPE & BD Model No. E22S during any shutdown/ breakdown period by decoupling the servo valve actuator, dismantling the valve completely, inspection of valve seat, stem and its internals, lapping the valve seat, stem by using special fixtures, reassembling in sequence and commissioning the valve, including the cost of consumables and hire charges for T&P's.

Charges for rectification of dislocated defective constant load hanger/ variable Load hanger supports of High pressure steam piping’s during any shutdown/ breakdown period, this work involves providing scaffolding and temporary support to pipe line, cutting, removing of defective hanger support and releasing of cover plate, tie rod, spring and setting spring load with special fixture and re assembling the whole unit and positioning the hanger support and fixing with hook & pipe, aligning of hanger support to its original position and releasing the pipe from temporary support, including the cost of consumables and hire charges for T&P's.

SHARTHI TECKMA CONTRACTS (BID ID -1282347)