WORK OF ROUTINE/ BREAKDOWN MAINTENANCE OF BOILER PRESSURE PARTS AND SOOT BLOWER OPERATION OF 5x200 MW, BTPS, OBRA

Amount

Attending the leakage of water wall tube in the boiler from down comer ring header to 52M/L, including burner zone and platen water wall (as per procedure) - Attending tube leakages up to first 10 joints (Irrespective of weld joint in one job)

Attending the leakage of water wall tube in the boiler from down comer ring header to 52M/L, including burner zone and platen water wall (as per procedure) - Attending tube leakages of each weld joints beyond 10 joints

Attending tube leakage from economizer and convective super heater as per procedure - Attending tube leakage up to first 10 joints (irrespective of weld joints in one frequency)

Attending tube leakage from economizer and convective super heater as per procedure - Attending tube leakage of each weld joint beyond 10 joints

Attending leakage of following parts i)Platen super heater, ii)Ceiling super heater tubes situated on the furnace top before paten super heater as per procedure annexed - Attending Tube leakages up to first 10 joints

Attending leakage of following parts i)Platen super heater, ii)Ceiling super heater tubes situated on the furnace top before paten super heater as per procedure annexed - Attending tube leakages of each weld joint beyond 10 joints

Attending tube leakages of following parts-i)Cold Reheat, ii)Hot Reheat, iii)Arch tubes, iv)Screen tubes, v)Extended water wall tubes, vi)Hanger tubes, vii)Exit S/H tubes, viii)Ceiling S/H tubes, ix)Headers Nipple tubes - Attending tube leakages up to 10 joints

Attending tube leakages of following parts-i)Cold Reheat, ii)Hot Reheat, iii)Arch tubes, iv)Screen tubes, v)Extended water wall tubes, vi)Hanger tubes, vii)Exit S/H tubes, viii)Ceiling S/H tubes, ix)Headers Nipple tubes - Attending tube leakage of each weld joint beyond 10 joints

Attending tube leakages in SCW and extended super heater as per procedure annexed - Attending tube leakages up to first 10 joints

Attending tube leakages in SCW and extended super heater as per procedure annexed - Attending tube leakages of each weld joint beyond 10 joints

Attending Pin hole crack of boiler tubes, headers stubs etc. in entire first pass, second pass, furnace zone, pent house etc.

Attending the leakage of hand hole plates of different pressure part header by removing hand hole plates with hand hole cutting equipment, re-welding of the same after complete preparations and stress relieving of the same after welding if required

Attending the leakage of header stubs up to 1st ten stubs joints in one frequency of different pressure parts headers of boiler

Removal of damaged clamps/binders/scallop bars etc. and replacement/refitting of the same with new/repaired one in different zones of the pressure parts - U clamp

Removal of damaged clamps/binders/scallop bars etc. and replacement/refitting of the same with new/repaired one in different zones of the pressure parts - scallop bars

Removal of damaged clamps/binders/scallop bars etc. and replacement/refitting of the same with new/repaired one in different zones of the pressure parts - binder, support-band, lug,

Removal of damaged clamps/binders/scallop bars etc. and replacement/refitting of the same with new/repaired one in different zones of the pressure parts - flexible Connectors (male/female)

Fabrication of Hot bends of various degrees and radius of curvature from straight pressure parts tubes by filling sand and heating gas to required temperature of following materials - carbon steel

Fabrication of Hot bends of various degrees and radius of curvature from straight pressure parts tubes by filling sand and heating gas to required temperature of following materials - alloy steel

Replacement of eroded/damaged tubes/bends of pressure parts in different zones of boiler during preventive maintenance as per procedure mentioned in annexure of the following - Carbon Steel/Low alloy (T-11) joint

Replacement of eroded/damaged tubes/bends of pressure parts in different zones of boiler during preventive maintenance as per procedure mentioned in annexure of the following - High alloy (T-22) joint

Replacement of eroded/damaged tubes/bends of pressure parts in different zones of boiler during preventive maintenance as per procedure mentioned in annexure of the following - Stainless Steel joint

Cutting and removal of skin casing/high crown plate by grinder and welding the same with suitable electrode by high pressure welding method, after completion of repair jobs of pressure parts if any - up to 15mm thickness

Cutting and removal of skin casing/high crown plate by grinder and welding the same with suitable electrode by high pressure welding method, after completion of repair jobs of pressure parts if any - above 15mm thickness

Erection of scaffolding and plateform in S-Panel and bottom ash hopper

Fins welding of water wall & steam cooled wall (Single side of fin welding length)

Complete washing of False Ceiling.

Complete washing of Pent House.

Complete washing of Dog House.

Complete washing of Cat House.

Complete washing of Re-heater gallery.

Complete washing of all plate form (from 8m/l to 52m/l).

Washing Over SA duct from APH outlet to wind box (L&R).

Washing of wind box (L&R).

Washing of area between front side of boiler and RC bunker

Rectification/replacement of ash protectors/ shielding/cassette baffles found damaged/eroded /distorted or providing new protectors in the following pressure parts Zone of Boiler - Tubular protectors/shielding of SH tubes,RH tubes,Water Wall tubes,LTSH Coils, Economizer coils and other area of boiler. For installation of protectors necessary scaffolding has to be made by the agency

Rectification/replacement of ash protectors/ shielding/cassette baffles found damaged/eroded /distorted or providing new protectors in the following pressure parts Zone of Boiler - Box type protectors/cassette baffles of LTSH Coils, Economizer coils etc. For installation/rectification of protectors necessary scaffolding has to be made by the agency

Inspection of Pressure Parts Tubes and Build-up of eroded portion caused by ash/steam erosion using suitable welding electrode matching with parent metal composition by Arc/Argon welding of 250mm length, 35mm width.

Erection of scaffolding and making approaches for checking of pressure parts tubes for rectification of defects. If any, in the following areas/zones and dismantling after completion of work - Super Heater/RH /W.W. Screen tube/SH screen tube/Low temperature super heater/ Economizer etc in single layer/elevation

Erection of scaffolding and making approaches for checking of pressure parts tubes for rectification of defects. If any, in the following areas/zones and dismantling after completion of work - Super Heater/RH/W.W. Screen tube/SH screen tube/Low temperature super heater/ Economizer etc in multi layer/elevation

Mobilization of team, Installation & Fixing of sky climber in boiler furnace after making proper plateform on bottom ash hopper. Dismantling and removal of sky climber/ash hopper plateform after completion of job.

Shifting of sky climber in boiler furnace at different location and inspection of various pressure part zones

Operation of Sky Climber up to 24 hrs

Operation of Sky Climber outside of boiler for checking its healthiness.

Servicing of control panel box of sky climber (motorized rope climbing machine)

Servicing of gear box, break assembly, internal drums and rollers of sky climber motor assembly

Work of Loading/unloading/stacking & up keeping of site stor/transportation of material/spares from Sore Division to site store of BMD-I / BMD-III, Obra

Removal of accumulated soot from heating surface by way of wall blowers No. 01 to 56 for unit no 9th,10th,11th,12th & 13th, 5×200MW, BTPS, Obra

Removal of accumulated soot from heating surface by way of wall blowers No. 01 to 56 for unit no. 12th & 13th, 2×200 MW, BTPS, Obra

Servicing of RWSE water wall deslagger

Replacement of Flange Gasket of head valve assembly of Wall Blower &Orifice of soot blowing system

Servicing of gear boxes of Rotary/Traverse motion of wall blowers

Replacement of damaged Swivel Tube of Wall Blowers

Complete servicing/Provisioning of head valve of wall blower.

Rectification of LTSH lower bank coils by replacing U bends, 90̊ bends and straight tubes (Rectification will involve at least 16 nos. joints which may be more depending on condition of coil)

Rectification of economizer coils by replacing U-bends, Straight tubes, their alignment & clamping (Rectification will involve 16 nos. joints which may be more depending on condition of coil)

Rectification of Re-heater coils by replacing bends, Straight tubes, their alignment & clamping (Rectification will involve 16 nos. joints which may be more depending on condition of coil. And fabrication of bend is also included in scope of work, if bends are not available)

SHAKSHI ENGINEERING CO.

M/S K K POWER CONSTRUCTION