MTPS I BM Pressure parts Units I and II Boiler Breakdown maintenance of Boiler Pressure Parts HP LP Valves Burner tilt mechanism cleaning and air washing of Boiler structures and floor and allied works

Amount

Charges for air cleaning and water washing the boiler tube puncture area to facilitate boiler tube rectification works.

Charges for leading, lifting of platform material arranging scaffolding and platform wherever required in the boiler area for rectification works, dismantling after completion of work and normalizing site.

Charges for identification, rectification of tube puncture up to 10 Joints including Arc filling by spool piece, edge preparation and welding by IBR welder and assisting for hydraulic test.

Charges for renewal of defective boiler tubes of size 44.5mm OD inclusive of transportation, cutting of defective tubes, edge/spool preparation, welding with IBR welder and assisting for hydraulic test.

Assistance and inspection for boiler hydraulic test when the unit is in standby condition. This work comprises of assistance for hydraulic test and inspection of boiler at pressurized condition in boiler I st pass inter pass II nd pass and economiser hopper area and allied valve operation etc.,

Charges for cleaning the accumulated coal dust, fly ash & other waste materials and air washing of structure, floor, walk way, hand rails, pipes etc in Boiler Ist & II pass area.

Charges for attending on defective / passing valves dismantling, inspection, lapping of valve seat and disc, renewal of sealing rings, gland packing etc., inspection of drive bush, bearings, etc. and renewing if necessary and assembling the valve & actuators. a)Valve of sizes 150/250, 100/250 and 65/250

b) Valve of sizes 250/40, 200/40, 150/40 & 100/40.

c) 40 mm to 50 mm valves

d) 15 mm to 25 mm valves

Charges for overhauling of RH/ SH spay control valves by dismantling, inspection, lapping of valve seat and disc, renewal of spiral wound gasket and gland packing etc. cleaning, freeing of all fasteners and renewing if necessary, assembling the valve

Charges for transportation of new/ reconditioned valves from stores to Boiler site, cutting the damaged valve and fixing the new valve in position. a) valves of size up to 25 mm

b) valves of size 40 mm to 50 mm

Charges for attending defective / passing safety valves of boiler drum/ steam line by dismantling, inspection, seat lapping, renewal of worn out parts etc.

Charges for attending burner by removal of outer / inner cover plates for repair & renewal of damaged Reach rod assembly/ eroded nozzle welding etc. after completion of work normalizing the Burner.

Charges for leading lifting of refractory at store and site, stacking at 7m to 52 m elevation of Boiler, chipping removal of cracked/ defective refractory, cleaning, surface preparation, refractory preparation and application on damages by patch work at various elevation of Boiler, removal of loose refractory, lowering, disposing to waste disposal area

Charges for transportation, erection of sky climbers and dismantling after completion of overhaul works.

Charges for operation of sky climbers as per the requirements to assist various overhauling works such as Boiler cleaning, burner overhaul, tube thickness survey, tube rectification works etc., during the entire overhaul period.