WT2477

SECTION -A AOH WORK OF PRESSURE PARTS UNIT NO. 10 & 11 of 2X250MW for the YEAR 2019-20

BOILER FURNACE

Inside cleaning of Furnace & inspection of W/W , PTSH, RH, SCREEN, FSH with the help of Sky Climber and assistance in thickness measurement of Tubes OR

Erection & dismantling of cup lock scaffolding in Furnace, Re- heater, Platen super Heater, Final super Heater and assistance in thickness Measurement of tubes & cleaning by High Pressure Jet ( Pressure more than 100 kg per sq. cm)

Cleaning and inspection of LTSH, Economizer, Steam Cooled Wall, Supply Tube, inspection & assistance in thickness measurement of tubes of above area, necessary scaffolding in above area will be in the scope of work.

Inside cleaning or Pent house Cat house and Dead chamber.

Repairing of Pent house Cat house and Dead chamber.

Out side cleaning of Boiler

Out side cleaning of Pent house & Roof

Repair/complete servicing of Boiler manholes

Repair/complete servicing of Boiler Peepholes

Removing damaged/ defective portion of tubes, replacement & HP welding joint in the following areas (No. of joints)

Water Walls /Screen Tubes.

Pt. Sup Heater/ Roof Tubes/ Spacer Tubes/ FSH Tubes

Reheater

Economizer

L.T.S.H. & associated steam Cooled Walls

Drain lines of SH/RH Spray/ Drum root valve lines

Fin welding alongwith fabrication and fitting in WW Extn steam Cooled Wall

Metal buildup on eroded H.P. Tubes size 2"x2"

Reinforcement of old eroded H.P. Joints

Repairing of Header stubs hand hole plugs

Repairing & fabrication and installing of crown plates and heat shield plates

Providing MS Plates, HR sheet for covering of the all tubes of Burner plates at all four corners

Fitting of Scalopad bar in all 4 ash Pannel corners

Checking, cleaning & rectification of Buck Stay Corners joints including stirup

Removal & replacement of hand hole plugs which includes repairing of plug re- welding, preheating & stress relieving

Fixing of readymade Baffles on Screen /Water Wall/ Reheater/LTSH/Economizer Tubes

Readjustment and realignment of Cassette Baffles of Economizer top and bottom Coils

Readjustment and realignment of Cassette Baffles of LTSH Coils

SERVICING OF HP VALVES

Main Steam Stop Valve size 350 Nb

Feed Valve, Economizer inlet, Eco NRV etc heavy duty size 350 Nb.

Size 150 mm Nb

Size 65 mm Nb

Size 40 mm Nb

Size 25 mm Nb & below.

Replacement of H.P. Root valve of impulse line.

Replacement of H.P. Line thermowell instruments

Replacement of glands of H.P. valves size: 25 Nb to 300 Nb.

REPLACEMENT OF VALVES

Replacement of HP Valve size 150 NB

Replacement of HP Valve size 100 NB

Replacement of HP valve size 65 Nb.

Replacement of HP valve size 40 Nb.

Replacement of HP valve size 25 Nb & below

Servicing & repairing of oil heating unit

Complete overhauling of boiler filling Pump

HP Joints of Tracing Line.

Servicing of critical piping hangers

Castable refractory removal & reapplication

INSULATION

Removal and reapplication of insulation in the following areas a) Critical piping b) Boiler Furnace.

Only sheeting work over insulation at above areas of boiler.

Servicing of LRSB

Servicing of WW SB

Inspection of Boiler Drum

Fabrication of Pressure part bends.

Servicing of Safery Valves

work of Painting of Boiler Structure

SECTION -B BREAK DOWN MAINTENANCE OF PRESSURE PART UNIT NO. 10 & 11, STPS, SARNI DURING FORCED OUTAGE

Initial Moblisation & Scaffolding including Cleaning in inside Boiler including S/H & R/H zone.

Removing damaged/ defective portion of tubes replacement & HP welding joint in the following areas (No. of Joints)

Water wall

Economizer

Super heater tubes

Reheater Tubes

High Pressure Drain Lines

Fin Welding of HP tubes in W/W & SCW

Metal built up on eroded HP Tubes size- 2”x2”

RE-enforcement of eroded joints

Replacement of HP Valves (size-25 to 300 NB)

Replacement of Glands of HP Valves size-25 to 300 NB

Servicing of HP Valves size-25 to 300 NB

Servicing MSSV/ Safety Valves

Fabrication of Pressure Parts Bends

Removing & Replacement of Refractory

Servicing of Oil Guns

Servicing of Heavy Oil Pumps/ Light Oil Pumps

Servicing & Attending Leakages of Oil heater/Oil Filter of Heating Station

Repairing of Buck stay Corners

Insulation & GI Sheeting

Only GI Sheeting on insulation

Servicing of Water Wall Soot Blower

Servicing of Long Retractable Soot Blower

ABZAN CONSTRUCTION PRIVATE LIMITED