Annual breakdown /running maintenance of H.P./ L.P. valve of Boiler and Turbine side of Unit no. 9, 10 ,11,12 and 13 of 5X200MW,BTPS, Obra

Amount

Overhauling of L.P. valve

Patch welding work to attend:

Leakage in L.P. Pipe, Size – 51 to 100mm

Leakage in L.P. Pipe, Size – 101 to 200/350mm, 200/300mm.

Fabrication of bend from L.P. Pipe:

Up to 50mm

Cutting welding for joints of L.P. pipe:

Up to 50mm dia.

51 to 100mm dia.

101 to 150mm dia.

151 to 200mm dia.

Attending the flange/ bonnet leakage of H.P. valve:

Up to 50mm

Attending the flange leakage of H.P. pipe:

Up to 50mm

Cutting / welding & replacement of L.P. Valve:

Up to 25mm

Overhauling of ‘U’ Bend valve i.e.-V2-20

Overhauling of isolating valve of PCV-5/ 14 /17 valve i.e. V2 -16/18/ V2-50(I/II) / V6-1 (I/II)

Overhauling of by pass line valve of PCV-5/ 14 to 17 valve i.e. V2 -26 (I/II)/V2-17/ V2-51 /V6-2

Overhauling of valve connected to deaerator at -13 meter V2-21.

Overhauling of suction valve of BFP / discharge valve of condensate pump, i.e. MC-11,/12 / 13.

Overhauling of by pass valve of temperature control line valve, i.e. V2- 43/ 45 and primary root valve of steam line.

O/H of suction valve of condensate pump i.e. MC-1/ 2 / 3 / condensate line valve replaced to GC-1 (i.e. MC-18) / ejector (i.e. MC-19)/ LCV-15 (i.e. MC-20/21 / 37)/ LPH-1A/1B (i.e. MC-22/23 /24) / LPH (i.e.. MC-25/26/27/28/29/30/31/32/ MC-33)

I.P.T. transfer pipe line, heating line drain valve.

Fabrication of reducer for H.P Drip line, Size: 218 mm/80mm OR 168/80 mm.

Replacement of reducer of H.P Drip line by H.P welding technique.

L.P.H. drain line valve i.e. HD-8/9/14/15/16/ 17/ 18/19 or 20

Checking/inspection and rectification of fault of internal of deaerator.

Cleaning of filter of lub oil cooler of turbine /H2 gas cooling filter.

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 / 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-4/38/39/40/ 41 / CA-5

AS-47 /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) / 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,any of ES-3 /4/5/6/ ES-7/ HD-21/ HD-29/HD-30/ HD-31

Valve connected to condenser i.e. DW-4/DW-37/38/39/40/ DW-41/ CA-5.

AS-47 /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 / isolating feed valve/ MSV by pass valve i.e. V2-27/V2-15/ V2-7 valve actuator.

Actuator of steam isolating valve to LPH-2/3 /4

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 LPH-3/LPH-4

Re-visioning of GC-I/GC-II for attending the flange leakage.

Tightening of flange of CRH / 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 /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 /main hook

Servicing of hydraulic brake system CT/LT trolley / 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 /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 /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 TG hall.

Complete O/H main hook

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

Servicing of Feed line / Steam line gate valves / control valves viz.V2-116/V2-117/V2-85/V2-86/FCV-1&7/ V2- 48/56 (L/R) / E2 etc.

Servicing of E-2 NRV (Nb-300mm, Np-250 Kg/cm2).

Servicing of Low Load line gate valves / Control Valve(FCV-2).

Servicing of pneumatically operated S/H spray valve (E-19). Valve size Nb150mm, NP-250Kg/cm2.

Servicing of pneumatically operated R/H spray (R-17) valve.

Servicing of pneumatically operated S/H / R/H spray control /isolating valves.

Servicing of bypass valve of main steam line valve.

Servicing of boiler drum safety valves at 52meter elevation.

Servicing of electromagnetic relief valve (implus safety valve).

Servicing of safety valves installed on hot reheat, cold reheat line and main steam line on right hand side of boiler at 52meter elevation.

Servicing of safety valve on soot blower line at 52mtr elevation.

Servicing of following sizes Valves-

15 mm to 25 mm Valves.

40 mm to 50 mm Valves.

65 mm Valves.

100 mm Valves.

150 mm to 200 mm Valves.

Servicing of high-pressure valve & NRV’s at different elevation from ‘0’meter level to 54meter level nominal bore may vary from Ø10mm to Ø100mm.

Servicing of L.P. Valves of Air Line,/Oil Line / Water Line

Replacement/Servicing of the following Actuators-

V2-116/ 117/ V2-85 / 86/ V2-48/56 (L/R)/ E-2 Valves.

B-55/ S-16 and soot blower isolating Valve size 65 mm.

Replacement of following sizes Valves -

15 mm to 25 mm Valves.

40 mm to 50 mm Valves.

65 mm to 70 mm Valves.

100 mm Valves.

150 mm to 200 mm Valves.

R-17 Valves.

Changing flange gasket of valve at different elevation of boiler.

Replacement of gland packing with new one.

Replacement of various safety valves of such as Boiler Drum/Main Steam/CRH/HRH line etc.

Replacement of high Pressure valves (motor operated / hand operated/ Pneumatic operated) of critical piping of Boiler of size: Nb-40mm to 65mm.

Replacement of Bends/Straights of High Pr. Drain Line/Air Vent Line/Air Line (Up to one meter length) -

Size Ø 16 mm X 1.5 mm to Ø 44.5 mm X 4.5mm.

Size Ø 45 mm X 4.5 mm to Ø 80 mm X 7.1 mm.

Welding of Main Steam Line Joint By TIG Welding.

Repairing of Main Steam Line Joint.

Welding of Cold Reheat / Hot Reheat Line.

Attending minor leakage from Pipe & Bends.

Replacement of 300 mm Valves of Feed Line /Main Steam Line.

Replacement/Repairing of shade at the different area of Boiler side.

Replacement of gasket of manhole of boiler drum.

KIRAN CONSTRUCTION COMPANY