ANNUAL MAINTENANCE CONTRACT FOR MAINTENANCE OF BOILER AND AUXILIARIES Unit 7 and 8 and OPERATION AND MAINTENANCE OF MILL REJECTION SYSTEM OF UNIT8

Amount

MANDATORY PART

MANDATORY PART FOR UNIT#7 & 8 AND O&M OF MILL REJECTION SYSTEM OF UNIT#8

Monthly charges for MANDATORY PART FOR UNIT#7 & 8 AND O&M OF MILL REJECTION SYSTEM OF UNIT#8

Yearly charges for MANDATORY PART FOR UNIT#7 & 8 AND O&M OF MILL REJECTION SYSTEM OF UNIT#8

OPTIONAL PART Boiler tube leakage repairing including necessary alignment of coils, supply of all consumables including electrodes, filler rods, S.R and radiography(100%), with supply & erection of scaffolding with material(sky-climber compatible for Unit#8 will be supplied by DPL. For attending tube repairing/alignment etc, erection of scaffolding with material to be done up to roof tube as per requirement if sky-climber is not available or out of order of not approachable.), supply of T&P, casting of refractory ( up to 1 MT), manpower etc. as per requirement.(per joint)

Water wall tube joint. (U#7 & 8)

Economizer tube joint. (U#7 & 8)

Roof tube joint. (U#7 & 8)

Screen tubes/cage tubes/LTSH & Economizer Hanger Tube/Steam cooled Wall Joint (U#7 & 8)

All Re-heater joint (U#7 & 8)

Super heater joint(expect LTSH) (U#7 & 8)

Division panel joint (U#7 & 8)

Second pass enclosure wall tube joint (U#7 & 8)

Removal, fabrication and fitting of guard tube and guard plate. (U#7 & 8)

Coal Mill overhauling as per scope of work in annexure II(A) including all consumables ( including hard face electrode), man power, T&P, scaffolding with material, measuring instrument, re-alignment and trial run etc. (U#7 )

Coal Mill overhauling as per scope of work in annexure II(A) including all consumables ( including hard face electrode), man power, T&P, scaffolding with material, measuring instrument, re-alignment and trial run etc. (U#8 )

Coal mill –mini overhauling as per scope of work in annexure II (B) in case of mill internal troubles like roller jamming/ mill internal liner/ static or rotary nozzle ring replacement. (U#7)

Coal Mill gear box as per scope of work in Annexure- II (C)- replacement including all consumables, T&P, manpower, measuring instrument, scaffolding with material, re- alignment of motor with and trial run (U#7)

Coal Mill gear box as per scope of work in Annexure- II (C)- replacement including all consumables, T&P, manpower, measuring instrument, scaffolding with material, re- alignment of motor with and trial run (U#8)

ID Fan runner Patch & Rebladding – necessary plate cutting & welding, hard facing, bearing checking, static balancing , alignment ( both fan & Voith coupling and motor & Voith coupling) all consumables including hard facing rod, T&P, manpower etc with trial run. (U#7&8)

Manual cleaning of chocked A.P.H basket including ash removal, all consumables, T&P, manpower etc. on the basis of no of basket. (U#7&8)

Coal carrier Pipe Bend replacement during Unit running/ shut down condition- erection of scaffolding with material, dismantling of bend , alignment, rectification of leakage including supply of electrode, T&P, manpower and all other consumables etc. (U#7&8)

Coal carrier Straight Piece replacement during Unit running/ shut down condition- erection of scaffolding with material, dismantling of Straight Piece , alignment, rectification of leakage including supply of electrode, T&P, manpower and all other consumables etc. (U#7&8)

Replacement of coal burner- Dismantling of -coal nozzle tip, P.A duct for coal burner, and coal carrier pipe attached with coal burner, reach rod arrangement. Replacement of- P.A duct, nozzle tip, diversion plate and others, alignment, T&P, manpower and all other consumables including necessary Nut and bolt with washer, gasket etc. (U#7&8)

Repair & replacement of coal burner- Dismantling of- coal nozzle tip, P.A duct for coal burner, coal carrier pipe attached with coal burner, reach rod arrangement. Necessary cutting and grinding of coal burner. Repair of -P.A duct, nozzle tip diversion plate and others. Hard facing (hard facing electrode to be supplied by party), alignment, T&P, manpower and all other consumables including necessary Nut and bolt with washer, gasket, electrode etc. (U#7&8)

Repairing / servicing of L.V.F.O Oil burner total assembly- Necessary cutting and replace of guide tubes,F.O diffuser cone with flexible Hose repairing/change –if reqd.,ash & Clinker cleaning, alignment, T&P, manpower and all other consumables including necessary Nut and bolt with washer, gasket, electrode etc. (U#7&8)

Repairing / servicing of L.D.O Oil burner total assembly- Necessary cutting and replace of guide tubes,L.D.O nozzle repairing/change –if reqd.,ash & clinker cleaning, alignment, T&P, manpower and all other consumables including necessary Nut and bolt with washer electrode etc., gasket, (U#7&8)

De-metering of boiler tubes- (U#7&8)

P.M.I of material – per day. (U#7&8)

Ash cleaning &tit bit repairing of pent house , dead chamber ,duct, buck stay etc during shut down/running condition as per direction of EIC. (U#7&8)

APH gear box replacement including all consumables, Replacement of bearing, T&P, manpower, measuring instrument, scaffolding with material, re- alignment of motor with and trial run. (U#7)

APH gear box replacement including all consumables, Replacement of bearing, T&P, manpower, measuring instrument, scaffolding with material, re- alignment of motor with and trial run. (U#8)

Drop test for calibration of coal feeder- Dismantling/fitting coal feeder to mill inlet drop pipe, fitting/dismantling of coal carrier pipe for drop test, transportation of coal(mill to weigh bridge & weigh bridge to C.H.P. yard),preparation of chart, T&P, manpower and all other consumables including necessary Nut and bolt with washer electrode etc., gasket etc. (U#7&8)

Repairing of Duct in different areas of Boiler. Scope of work stated in Annexure-II(D) (U#7&8)

Assembly of roller journal assembly (per roller journal basis) (U#8)

BHEL make gravimetric coal feeder overhauling including consumable, T&P, man power etc. for removal of coal, inside thorough cleaning, servicing/replacement and complete fitting of one set feeder body liner, bunker O/L gate, feeder I/L and O/L gate, servicing/changing of belt, head pulley, tail pulley, weigh span rollers, inlet span roller, scrapper, feeder bottom plate, clean out conveyer and gear box, motor to gear box alignment for main motor, gear box oil replacement for main motor gear box and C.O.C. gear box up to trial run (u#8)

Replacement of APH Support Bearing with all associate work (Special jack for lifting the assembly is in party scope). (U#7) (300 MW)/ (U#8) (250 MW)

Dismantling and lifting of LTSH module and placed in position after repairing (One module consist of two upper coil and two lower coil) of#8

Dismantling and lifting of Economizer module and placed in position after repairing (One module consist of two upper coil and two lower coil) of#8

Stress relieving as per schedule (U#7&8)

Fabrication of different size high pr bend(cold bend) (U#7&8)

High pr welding above 100 NB and upto 150 NB diameter steam pipe at different position of (U#7 &#8)

High pr welding above 150 NB and upto 200 NB diameter steam pipe at different position. (U#7&8)

Radiography of welding joints as per schedule for header area ( U#7 & 8)

High pr. Welding above 200 NB and upto 300 NB diameter steam pipe at different position

Replacement of feeder to mill SS drop pipe (Both Upper & Lower), dresser coupling and gasket with necessary scaffolding. Replacement/ patch work of centre feed pipe. Completion time 02 days (U#8)

Fabrication of mill upper journal liner plate/guard plate complete set by 8 mm/10 mm MS Plate. One set is equal to 06 numbers. (Of #8)

Reclamation of feeder outlet chute (AFTER FEEDER OUTLET GATE) by SS plate and then outside MS plate patch welding. (U#7&8)

Reclamation of feeder to mill SS drop pipe with flange require size SS plate/pipe and then outside MS plate Patch welding. Length of each pipe 3meter. (U#7&8)

Sky climber fitting inside the boiler for tube and burner repair work (necessary scaffolding, tools and tackle in party scope including sky clamber dismalting) (U#7&8)

TECHNO ENGINEERING