Annual breakdown / running maintenance of H.P. Valve, L.P. Heater, Gland Steam Cooler and EOT Crane and etc. work of unit no. 9, 10,11,12, and 13 of 5X200 MW, BTPS, Obra

Amount

Overhauling of special valve.

Main steam valve i.e. V2-6 (L&R)

Extraction Motorized valve i.e. ES-3,4,5,6, & 7

Feed line valve with their by pass valve i.e. V2-81-A, V2-81-B, V2-81-C and V2-82, V2-83, V2-84

Drip line gate valve i.e. HD-21, HD-29, HD-30, HD-31

NRV of extraction line, ES-1/ES-2

NRV of extraction line, ES-8/ES-11

Motorized valve connected to condenser, i.e. DW-4, 38 to 41 & CA-5

AS-47 and AS-48 valve.

CST Makeup valve.

Forced closing non-return valve LPH-3&4 and steam isolating valve of LPH-3 & 4.

Condensate water throw off valve to condenser (L&R)

Steam throw off valve to condenser(L&R) and steam isolating valve of LPH-2

Steam by pass valve i.e. V2-27, V2-15, & V2-7

Cutting & Replacement of special valve by H.P welding technique

V2-27 & V2-15 valve.

ES-9 valve.

V2-38, V2-81, V2-82, V2-83, V2-84 valve size-250 mm.

Overhauling of actuators of valve.

Main steam line stop valve, MSV-L&R

Extraction of drip line valve, ES-3 to ES-7, HD-21, HD-29 to HD-31

Valve connected to condenser i.e. DW-4, DW-37 to DW-41and CA-5.

AS-47 to AS-48 valve actuator

Butterfly valve actuator.

CST makeup valve actuator.

Actuator of steam throw off valve for condenser (L&R), discharge valve of BFP-A, B &C & HPH by pass and isolating feed valve, MSV by pass valve i.e. V2-27, V2-15, V2-7 valve actuator.

Actuator of steam isolating valve to LPH-3 to LPH-5

Blanking of CRH line flange for H.T. of re-heater and normalizing their after hydraulic test of re-heater.

Overhauling and Re-visioning of LPH-2 to LPH-4

Re-visioning of GC-I, GC-II and attending the flange leakage.

Tightening of flange of CRH and GC-I, GC-II, LPH during running.

Overhauling of LPH-1A, LPH-1B

Overhauling of gauge glass of LPH, GC-I, GC-II, Condenser Main ejector and deaerator.

Removal chocking oil tray drain of bearing no.-1 & 2 of main turbine.

Removal of chocking of drain system of centrifuging machine.

Overhauling of HP/LP by pass valve:

Overhauling of HP by pass valve.

Overhauling of LP by pass valve.

Overhauling of HP/LP by pass spray valve.

Replacement of damaged NRV by repaired/ new NRV of PCV-14 PCV-17 Size-200mm.

Replacement of damaged NRV by repaired/ new NRV of feed line by H.P. welding technique (Size-250mm, Pr.-200Kg/Cm2)

Overhauling of DSS of Aux., PRDS-II

Overhauling of L.P. NRV.

Overhauling of different flash tank.

Main flash tank.

Aux. flash tank.

Repair/replacement of broken hanger.

Tightening of loose hangers.

Overhauling of butterfly valve of condenser inlet/outlet in position.

To attend the flange leakage of CRH Line.

Hot tightening of cross over pipe and application of liquid glass and asbestos.

Hot tightening of ejector during running to stop the flange leakage.

Patch welding work in the condenser and L.P. Zone in condenser.

Chit Ram Crane (Capacity-120/25 Ton) Garlic Crane-75/10 Ton.

Servicing of all the gear boxes of LT/CT Trolley Aux. hook and main hook

Servicing of hydraulic brake system CT/LT trolley and Aux. hook including the changing of brake lining of all the four brakes system for which workshop facility will be provided by the department.

Servicing of greep brake system of LT/CT Trolley Aux. hook and main hook which includes the changing of the brake line.

Servicing of all the wheel of CT/LT Trolley and checking of their fish plate.

Checking and greasing in all the bearing of long travel shaft and cross travel shaft and checking & greasing of all the gear coupling of above shaft and changing of rubber bush coupling bolt of motor and shaft.

Complete O/H of small hook system of chit Ram/ Garlic Crane in T.G. hall.

Complete O/H of main hook.

Checking cleaning of wire rope drum their bearing & application of cradium compound in the wire rope.

M/s Varghese Contractor

KIRAN CONSTRUCTION COMPANY