Preventive / breakdown maintenance of APH, Duct, ESP and AFGCS

Amount

Routine maintenance of Air Preheater

Daily routine maintenance work of E.S.P. in all three units during day in general shifts.

Up keeping of the divisional office.

Repairing of casing of Air Pre-heater.

Replacement / rectification and setting out board / middle board / in board radial seal and plates of hot end of APH.

Resetting / replacement of circumferential (bypass) seals of Hot end of APH.

Repairing / replacement of static seals plate by cutting, grinding, welding after fabrication of at hot end of APH for one No. sector plate.

Fabrication and replacement of rotor post seal of hot end of APH

Replacement / rectification and setting out board / middle board / in board radial seal and plates of cold end of APH

Resetting / replacement of circumferential (bypass) seals of cold end of APH

Repairing / replacement of static seals plate by cutting, grinding, welding after fabrication of at cold end of APH for one No. sector plate

Fabrication and replacement of rotor post seal of cold end of APH.

Resetting / replacement of axial seals and leveling of axial seals plates by means of adjusting bolts in APH

Complete overhauling of Air motor of APH

Complete overhauling of soot blowers along with gear boxes of APH.

Revisioning / repair of air seal housing of guide bearings of APH.

Replacement of asbestos rope of required size of man hole of APH.

Cleaning of APH heating elements baskets and steam coil air pre-heater by air or water or both if required

Replacement of bracing pipe of APH

Alignment of motor with reduction gear box

Alignment of Air motor with reduction gear box.

Replacement of gear box (5APC) of main drive.

Inspection of support bearing of APH

Inspection of guide bearing.

Replacement/repairing of one no. rotor angle 60 0. Job involves cutting of damaged rotor angle and assembly / fitting of new rotor angle by welding.

Replacement/repairing of one no. rotor angle 30 0. Job involves cutting of damaged rotor angle and assembly / fitting of new rotor angle by welding.

Replacement/repairing of one no. T- Bar. Job involves removal of damaged T-bar and fitting of new one by fastener & welding if required.

Replacement/repairing of one No. by pass angle. Job involves removal of damaged bypass angle by cutting and fitting of new bypass angle by welding

Scaffolding in cold end of A.P.H. for cleaning of cold end basket

Scaffolding in hot end of A.P.H. for cleaning of hot end basket

Removal of Scrap material from ash hopper

Overhauling of lube oil pump of guide / support bearing of APH

Leveling of rotor

Servicing of lube oil system of guide / support bearing of APH. One job includes one lube oil system of guide / support bearing

Cleaning / replacement of cold end Baskets of one No. APH Up to 10 Baskets.

Cleaning / replacement of cold end Baskets of one No. APH beyond 10 Baskets.

Fabrication & erection of plate forms/ structures for facilitating the various running and breakdown maintenance work of APH

Replacement/Repairing/Adjustment of adjuster bolt of sector plate

Servicing of gate valves and NRV of LOP System

Minor repairing of expansion Joints/Centre Section/ Sector Plate by welding In Flue Gas/Primary Air/ secondary Air Path

Repairing of Man Hole of Hot/ Cold End

Overhauling of gear box of APH main drive.

Replacement of Over Running Clutch

Replacement of Taper Lock Bush

Replacement of Fluid Coupling

Replacement of Air Motor

Replacement of Kaowool

Repairing of FCU 11.5 fluid coupling

Fabrication of support grating (Outer or inner parts) of cold end baskets of APH of one segment.

Repairing and internal cleaning including one coat of primer of heating element baskets of Air Pre-heater.

Overhauling of flue gas, primary air, secondary air inlet / outlet and interconnecting dampers of APH (A&B) up to ESP inlet

Replacement / repairing of eroded flap of various flue gas dampers made out of 3.15mm thick M.S. sheet / or sheet which shall be provided by the department free of cost.

Fabrication of semicircular baffle plate out of 6mm or available plate and installation of same in the ducts connecting APH outlet to E.S.P. inlet.

Welding of various ducts with arc welding to arrest leakage of air / gas.

Cleaning of Aerofoil of secondary air duct to wind box (L&R)

Repairing / replacement of bracing of flue gas duct

Cleaning of complete structure, electrodes, insulator bushing and shock bars of all the fields including hoppers of ESP by wire brush, compressed air by opening hopper side & top manholes

Cleaning of complete structure, electrodes, insulator bushing and shock bars of one field & connected two Nos hoppers of ESP by wire brush, compressed air by opening hopper side & top manholes.

Cleaning of complete two Nos hoppers of one field of ESP.

Replacement of damaged Motor gear of rapping system

Repairing of damaged rapping gear box.

Servicing of rapping gear box coupling bearing block

Straightening of bent collecting electrodes

Removal & fixing the collecting electrodes

Repairing of bend collecting electrodes in ESP in fixed condition

Removal of damaged emitting electrodes and fixing of same

Servicing / repair / replacement of rapping hammer

Repair / replacement of bent shock bar

Repairing/Straightening of rapping shaft

Repair / fixing and welding of ash deflector plate

Two coat of continuous run of welding on ESP ash hopper, ESP roof, other places in ESP

Fabrication and erection of new deflector plates in ash hopper

Inspection and checking of fields and removal of minor defects

Replacement of asbestos rope of ESP top manholes

Replacement of asbestos rope of ESP side manholes

Replacement of asbestos rope of ESP hopper manholes

Fixing of collecting electrodes with new clamp by welding

Straightening/replacement of guide bar of collecting structure.

Replacement of damaged shaft insulator by new one

Replacement of the damaged support insulator by new or replacement of sealing asbestos rope of size φ 20 mm & 10 /8mm

Repair of support insulator screen pipe of ESP

Alignment of distorted emitting structure

Repairing/Replacement of plain bearing by new one if required

Repair / replacement of shock bar guides, front, rear and support hook by welding and grinding wherever required

Servicing/repair of chain pully block of capacity 03 Ton

Repair / replacement of coupling of reduction gear box of emitting / collecting rapping system

Replacement of rapping shaft

Replacement of bushing insulator

Replacement of primary / secondary screen.

Welding of emitting support pipe with emitting frame.

Repairing or emitting frame by patch welding.

Replacement of damaged bracing pipe/support at ESP inlet.

Replacement / repair or vertical stay of emitting frame of ESP

Repairing of man hole by replacing the damaged plate portion with new one

Repairing of hammer of emitting / collecting rapping mechanism.

Repairing of shock bar

Repairing of shaft insulator

Fixing of asbestos/ corrugated sheet of roof of ESP

Shorting out different type of scrap and loading and transportation of the same from site store to central store and unloading the same including weighing on weighing machine

Erection / repair of grating at different elevation of ESP and other places

Fabrication and erection of steel structure work vize chute, plate form stair at ESP

Repairing / replacement of plate-form railing at ESP side.

Operation & running maintenance of ammonia flue gas conditioning system.

Attending leakage of welding joint up to 25 NB of ammonia flue gas conditioning system.

Attending leakage of welding joint above 26 NB up to 40 NB of amonia flue gas conditioning system.

Attending leakage of welding joint above 41 NB up to 100 NB of ammonia flue gas conditioning system.

Replacement of niddle valve of 15NB of ammonia flue gas conditioning system.

Servicing/Repacement of valve above 16 NB up to 40 NB of amlonia flue gas conditioning system.

Servicing/Replacement of valve/NRV above 41 NB up to 100 NB of ammonia flue gas conditioning system.

Cleaning/replacement/refitting of nozzles of ammonia flue gas conditioning system.

Replacement of bent/Tee of ammonia flue gas conditioning system.

Replacement of shield of diffuser pipes of ammonia flue gas conditioning system.

S ENTERPRISES

M/S S.N. SINGH

M/S BHARAT MECHANICAL AND STRUCTURAL WORKS