MTPS I TM Unit III Overhauling of IP Turbine connected Extraction Steam lines FCNRVs drain lines and to attend leak in Flash tank I during stator winding earth fault rectification work

Amount

Overhauling of GV 10"/1500 Class HO and PNRV 250 / 250 ATA , SCNRV 300 /150 Class, GV/GLV 10“/150, 300 class, 12 “/150, 300 class. Dismantling the valve, cleaning all the parts, Checking the seating surfaces. Lapping the gate/seat & flap/disc for perfect blue matching. Reassembling the valves with new self-sealing ring and bonnet gaskets and gland packing rings (TAG.NO: ES – 9 – 1 No)

Overhauling of GV 100 / 250 ATA III Gr. HO, GV 65 /250 ATA III Gr. MO/HO, GV 2.5”, 4" 2500 Class HO/MO valvesDismantling the valve, cleaning all the parts, checking the seating surfaces. Bearings. Lapping the gate and seat for perfect blue matching, Reassembling the valve with new self sealing ring and gland packings(Tag Nos. VDAS-123,AS- -34 -Total-2Nos)

Overhauling of GV 200 / 250 ATA M.O, GV 200 / 600 Class M.O, SCNRV 400,600mm/ 150 Class GV,500,600mm / 150 Class.Dismantling the valve/NRV cleaning all the parts checking the seating surfaces and actuator bearings, Lapping the gate / seat / flap for perfect blue matching, reassembling the valve with new self-sealing ring / bonnet gasket and gland packings.(Tag No: ES – 10, 11,14- 3 Nos)

Overhauling of GV, GLV 200 / 40 ATA, HO/MO, SCNRV 250 / 300/ 40 ATA, Control valve 6" x 6" / 300 class, GV 250 / 40 ATA H.O, 2.5”, 4” / 150, 300 class. Dismantling the valve, cleaning all the parts, checking the seating surfaces and actuator bearings. Lapping the gate / seat / flap for perfect blue matching, Re-assembling the valve with new bonnet gaskets and gland packings. (Tag No: ES – 2 – 1No)

Overhauling of GV 300/ 16 ATA MO, GV 300/40 ATA HO, GLV 200/ 40 ATA MO, Control valve 10 ” x 10" / 300 classDismantling the valve, cleaning all the parts of the valve, checking the seating surfaces and actuator bearings. Lapping the gate / seat / disc / flap for perfect blue matching. Reassembling the valve with new bonnet gaskets and gland packings. (Tag No: ES -13 - Total - 1 No.)

Overhauling of GV 150/64, 40, 16 ATA HO, GV 6 "/ 600, 300, 150 class HO, GLV 150 /40 ATA , GLV 6 ” / 300 class HO/MO, SCNRV 200/40, 16 ATA.Dismantling the valve, cleaning all the parts, checking the seating surfaces, bearing, yoke bush etc., Lapping the gate/seat/disc/flap for perfect blue matching. Reassembling the valve with new gland packing rings and bonnet gaskets without any leak. Checking the Actuator thrust base bearing and apply lubrication.(TAG No. HD, 44 - Total –1 No.)

Overhauling of GV/ GLV 1" class 800/1500/2500 HO/MO.Dismantling the valve, checking the seating surfaces. Cleaning all the parts. Lapping the disc with seat for perfect blue matching. Reassembling the valves with new gland packings and bonnet gaskets.(Tag No: Rotor heating inlet isolator to HPT & IPT valves -AS-35 & 36 Total -2Nos)

Inspecting of Flash Tank –I for any Crack and Cleaning.Cutting the man hole 500 x 600 mm in the Flash Tank No.1 & 2 for easy access to inspect the inner side of FT –1 and attending to cracks & welding joint leak inside the Flash Tank No.1. a) Cutting the man hole ( 500 x 600 mm) in the Flash Tank – I for easy access to inspect the inner side of FT-1

b) Cleaning the Flash Tank 1 grinding the cracked portion inside the tank bottom and middle welded joint and nozzle header joints etc. as per requirement and making ‘V’ grooves and welded the portion.

c) Grinding the manhole edge of the plate and Flash Tank-1 closing the manhole and welding after cleaning the inner side of the Flash Tank-1(Tag No – Flash tank-I)

Labour charges for replacement of valves, pipes, stubs, bends and Reducers by Non IBR welding works. Replacing the defective drain line valves or equivalent in Heater drip, condenser air, Auxiliary steam, and drain water & Extraction steam lines etc by Non IBR welder. ( Tag.No: Extraction steam to LP Heaters-3 &4, HP Heaters-5 and spindle leak off drain lines)

Labour charges for IBR welding for cutting and welding of GLV 1”/1500/2500 class valves or equivalent joints by IBR welder. (Tag.No:ES-6 & 7)

Cost of welding electrodes (SA 106 Gr B)

Cost of Cutting Gas for cutting the pipes, valves & bends wherever necessary.

Cost of welding electrodes for Non-IBR welding. Welding rod type - 7018

Cost of welding electrodes for IBR welding. Welding rod type - 9018

Consumables and Tools & plants for Item Sl.No:1 to 12