Overhauling of boiler pressure parts etc for boiler efficiency improvement of unit 4 SgTPP in Dec 2024

Overhauling of boiler

Overhauling of boiler drum

Scaffolding at first pass of the boiler (furnace zone) with top of bottom ash hopper sealing

Cleaning of furnace Zone, Div. panel,Dismantling Repairing and Refitting of CCP Bends of all 9 pulverizers.

Butt Joint (Insertion of tube) of Economiser & Water wall and Eco Hanger tubes.

Butt Joint (Insertion of tube) of LTSH ( (Including of LTSH hanger tubes), SH tubes . Other than T91 tubes )

Butt joint(Insertion of tube) of T91 tubes with out SR.

Butt joint(Insertion of tube) of T22 tubes

Scaffolding at Economiser, LTSH Zone and cleaning of Economiser Zone and LTSH, Screen area by LP water

Dissimilar butt joints of coil

Removal and fitting of tube guard(new)

Maximum 6 Inch length guard tube fittingas where requirement (Cutting/fitting/welding included) and cassette baffle repositioning

Removal &fitting of new Cassette Baffle

Inspection and run welding of ( economiser hopper& non PR parts area (Run welding)etc. )

Deposition of weld metal on tubes /stubs/header etc.

LTSH coil (Pair) lifting, inspection ( repairing and fitting with proper alignment. Per pair means coil with both upper and lower bank. )

Alignment of Div.panel,Platen, RH ( Front, RH Rear coil, LTSH,Eco coil and Spacer tube. Removing of support ,flex and ties and refixing are included. )

Replacement of HP valve of size 1 inch ( by straight tube or new valve )

Replacement of HP valve of size 2 inch ( by new valve )

Replacement of HP valve of size 3 inch ( by new valve )

Fabrication of different sizes of bends ( , U-loops etc. )

Replacement of boiler metal temp ( probe. )

Casing/membrance strip welding

D-metering of boiler tubes in all ( the high pressure zones of the boiler viz. LTSH, Economiser, DivSH,PSH, Front R/H, Rear R/H, Screen, furnace wall, roof tubes etc(as per direction of EIC). )

Radiography of pressure parts ( welding joints )

Stress relieving of welding joints ( per day )

Servicing of scaffolding door at ( boiler & pent house )

Servicing of manholes and ( peepholes of boiler. )

Scafolding below the bottom ash ( hopper for inspection of woven wire cloth and scallop plates and if found damage fixing of damage scallop plates ).

Anchor fitting for refractory work ( at different location of the boiler. )

Lance tube replacement of LRSB ( with scaffolding )

Wall soot blower (88 nos) servicing ( . Lance tube length adjustment, cleaning, greasing, compartment repair. )

DPT at inside of stub joint, wind box ( and four corner of furnace. Rate is included with scaffolding (if necessary). )

Assistance of reheater hydro test

Bottom ring header inspection

Scaffolding at just bottom of the ( backpass HDR )

Seal plate and Deeper plate of trough ( seal Removing, Repairing and Replacement )

BOILER PRESSURE PARTS EXPERT ( VISIT )

ENGAGEMENT OF BEST EXPERT FOR ( SAFETY VALVE OH WORK )

ENGAGEMENT OF BEST EXPERT FOR ( soot blower OH WORK )

ENGAGEMENT OF BEST EXPERT FOR ( HANGER SUPPORT OH WORK )

Expert Mobilization Charges

Replacement of HP valve of size 6 ( INCH by new valve )

BOILER INSPECTOR SUNDRY ( EXPENSES (OTHER THAN FEES) )

Hiring of reciprocating pump for ( boiler hydro )

Supply of NDT Level-II Expert ( (2 PERSONS) )

Replacement of HP valve of size 4 ( INCH by new valve )

Economiser coil(Pair) lifting,inspection repairing and fitting with proper alignment. Per pair means coil with tripple banks

HIRING of Hydra