Overhauling / Servicing of H.P. Valves and actuators including replacement of H.P. drip / drain line pipes of Unit-I of 3x210 M.W. ATPS

Amount

Servicing of feed line gate / control valves / NRV size NB- 300mm NP-250 Kg./ cm²

Servicing of low load line gate & control valves size NB- 200mm NP-250Kg/ cm²

Servicing of Pneumatically operated S/H, R/H Attemperation control valves & RH Spray block valves.

Servicing of main Isolating valve BF-61 at the inlet of SH spray station, size: Nb- 150mm, NP-250Kg / cm²

Servicing of main isolating valve of main steam line (L&R) M.S.-29 & M.S.-30, Nb-350mm, NP-250Kg/ cm²

Servicing bypass valves of main steam valves –MS-29A, and MS-30A, Nb-25mm, NP-250Kg/ cm²

Servicing of bypass valves of feed station, low load line valve and main isolation valve of inlet to SH-Nb-25mm, NP-250Kg / cm².

Servicing of boiler drum safety valves and safety valve on main steam line on right hand side of boiler at 52meter elevation MAXIMUM WORKING PARAMETERS: Pr.-175.8Kg/cm², Temp.354ºC (B-1), size-3”/6” Pr.-179.3/Kg./cm², Temp.354ºC (B-13), size-3”/6” Pr.-181.2/Kg./cm², Temp.354ºC (B-2), size-3”/6” Pr.-160.0Kg/cm², Temp.540ºC (S-32) size-2½”/2”/4”.

Servicing of electromagnetic relief valve (implies safety valve). MAXIMUM WORKING PARAMETERS:- Pr.-160.0Kg/cm², Temp.540ºC size-2½”/2”/4”.

Servicing of safety valves installed on hot reheat and cold reheat line at about 50meter elevation. MAXIMUM WORKING PARAMETERS:- i) CRH SV (R-5) Pr.-45Kg/ cm², Temp. -345 ºC, size- 6”&8”. ii) CRH –SV (R-6) Pr.46Kg/ cm², Temp. . -345 ºC, size 6”&8”. iii) CRH –SV (R-11) Pr.45Kg/ cm², Temp. -345 ºC, size 6”&8”. iv) HRH –SV (R-20) Pr.42.5Kg/ cm²,Temp.-540 ºC, size 6”&8”.

Servicing of safety valve on soot blower line at 52mtr elevation. MAXIMUM WORKING PARAMETERS:- SR –SV (SE-7) Pr.42Kg / cm², Temp. -360 ºC, size-2½”/2½”

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.

Replacement of H.P. Valves of sizes-Nb-10 / 15 / 25mm (H/ O) at different floors from ‘0’meter level to 54meter level and at Dearator floor by cutting of damaged valve and welding of new valve after its revisioning.

Servicing/replacement of hydra motor valves of oil station at AB / CD / EF elevation.

Servicing of oil line valves and NRV’s of oil station at AB / CD / EF elevation of boiler.

Servicing/overhauling of pneumatic operated dia150mm/dia 250mm valves on Aux. PRDS line and Deaerator.

Servicing /overhauling of electrically drive steam valve dia 100mm to 250mm on Aux. PRDS line.

Servicing/overhauling of electrically driven Nb- 400mm gate valve at Dearator.

Servicing/overhauling of electrically drove Nb- 50mm valves on Aux. PRDS line.

Servicing/overhauling of pneumatic operated control valve size 50 to 100mm

Servicing/overhauling of hand operated valve/NRV’s of size 150 to 250mm.

Servicing /overhauling of hand operated valves /NRV’s of size 300mm and above.

Servicing and revisioning of steam valves & NRV’s of Aux. PRDS line and Dearator.

Changing flange gaskets of valves & flange at different elevation of boiler.

Replacement of gland packing with new one from valves leaking from glands.

Attending leakages of pipeline & headers etc. of main boiler, Dearator and aux. PRDS of 3x210 MW by cutting grinding and H.P. welding of damaged portion putting new spools/bends if required. Note: -Rates should be quoted on the basis of per Cm/per cm thickness of welded seen, which should be inclusive of cutting, grinding, putting new spools/bends if required and H.P. welding.

Servicing/overhauling of pneumatically operated actuators of valve. Size dia 40 to 100mm.

Servicing/overhauling of pneumatically operated actuators of valves size dia 200 to 300mm

Fabrication of H.P. drip line bends out available pipe by cutting, grinding & H.P. welding.

Servicing / overhauling of safety valve of Aux. PRDS

Servicing/overhauling of safety valves of Dearator.

Blanking of hot reheat and cold reheat NRV by blanking device & normalizing the same.

Replacement of H.P. valves /NRV of 100 MM valve / NRV at Dearator floor by cutting and welding with New/repaired valve/NRV after its revision

Replacement of H.P. valves /NRV of 150 MM valve / NRV at Dearator floor by cutting and welding with New/repaired valve/NRV after its revision

Replacement of H.P. valves /NRV of 200 MM valve /NRV at Dearator floor by cutting and welding with New/repaired valve/NRV after its revision

Replacement of H.P. valves /NRV of 250 MM valve/NRV at Dearator floor by cutting and welding with New/repaired valve/NRV after its revision

Replacement of H.P.valve / NRV of 200 to 350 MM sizes at Dearator floor of flange end Type by opening Nut and Bolts of flange and installation of new /repaired valves/NRV on it properly after replacement of gasket

Replacement of start up vents (R /H & S / H), at 54-mtr elevation.

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

Replacement of Pneumatic actuators of valve size up to Nb-300mm at different elevations.

Replacement of H.P. drain pipes of size Nb-200mm, Thickness- 6mm, Material- Carbon Steel Per Joint

Replacement of H.P. drain pipes of size Nb-150mm, Thickness- 8mm, Material- Carbon Steel per Joint

OPTIONAL WORK

Replacement of various safety valves of critical piping such as Boiler Drum, Super Heater, CRH, HRH etc .

Replacement of 150mm PRDS Control valve

Replacement of 100mm PRDS Control valve

M/S BHARAT ENGINEERS AND ERECTORS

SHAKSHI ENGINEERING CO.