Annual Maintenance contract for Maintenance of Boiler pressure part of Unit 2 and 5 at BTPS

Amount

Maintenance of Boiler pressure parts Unit 2

ECONOMISER TUBE JOINT Tube OD 51 mm, Thickness 4.8 mm, Material: SA 210 GR.C or equivalent

INSERT AT FURNACE WALL, GOOSE NECK S-PANNEL & ROOF TUBE (1 insert = 02 nos. joint) Tube OD: 63.5 mm TO 69.9 mm, Thickness from 5.1 to 6.3 mm, Material: SA 210 GR. A or equivalent

JOINT AT SATURATED SCREEN ROOF & SIDE WALL, SCREEN TUBE, PRIMARY SUPERHEATER TUBE, SECONDARY SUPERHEATER TUBE. (OD: 63.5 mm, Thickness: 5 mm upto 6.9 mm, Material: SA213T11 OR EQUIVALNT)

JOINT AT REHEATER TUBE /INSERT AT FURNACE WALL, GOOSE NECK, S-PANEL & ROOF TUBE.

Second pass scaffolding

Economiser coil lifting repairing, fitting & jointing with proper alignment for unit 2 (if required for preventive checking beyond leakage area)

Primary & secondary superheater coil pulling, inspection and proper alignment of coil & panel with clit and support welding of unit 2 (if checking required for preventive inspection)

Maintenance of Boiler Pressure Parts Unit 5

LP water Cleaning Economizer Zone, PSH & PRH

Joint for lnsertion of water wall tube, cage rear wall below main cavity & baffle wall tube below main cavity,Size: 63.5X5.4, Mat: BS3059/45S2 or 5A210Gr.C.

Insertion joint for division wall tube Size: 82.5X7, Mat: BS3059/45S2; or SA210Gr.C

Joint for lnsertion of furnace roof, cage rear wall & baffle wall tube above main cavity, Size: 63.5X4.8, Mat: BS3059/620S2 or SA213T11

Joint for Insertion of economiser tube Size: 38.1X3.6, Mat: BS3O59/45S2 or SA210Gr.C

Insertion joint of PSH bottom & middle Size:57.1X6, Mat: BS3059/620S2 or SA213T11

Joint for Insertion of PSH top bank tube tube, Size: 63.5X3.6, Mat: BS3059/33S2 orSA210Gr.C

Insertion joint of PRH bottom & middle Size: 57X3.2, Mat: BS3059/620S2 or SA213T11

Joint for lnsertion of PRH top bank tube Size: 57X3.2, Mat: BS3059/620S2 or SA213T11

Joint for lnsertion of PLSH and FSH inlet tube, Size: 44.5X7, Mat: SA213T22

Joint for lnsertion of FSH & FRH tube Size: 50.8X3.6, Mat: SA213T91

Economiser/PSH/PRH coil lifting, inspection repairing and fitting with proper alignment (if required for preventive inspection beyond the leakage area)

Platen SH, FSH, FRH coil pulling inspection and proper alignment of coil and panel with clit and support welding

Second pass scaffolding Per 6 Meter

Servising of Wall blower

Common work for Unit 2 & Unit 5

Stress Relieving

Radiography

Removal and refitting of refractory

Replacement of high pressure valve size upto 2''

Replacement of high pressure line (1/2'' to 4'') (Unit of 01 "Number" includes two joints)

Deinsulation & insulation with cladding of wall, casing and pipe and other area of boiler

HP Valve Welding from 50 NB upto 100 NB pipe

HP valve gland packing replacement upto 6"

HP valve servicing including gland packing & bonnet seal replacement upto 4"

D-metering of boiler tube at any area of boiler for thickness measurement (minimum survey 150 nos./day)

Minimum mobilization charge if total executed job value less than Rs.15000.00

Vertical scaffolding for approaching Roof Tube/ Reheater/ Secondary SH (Per 6 Meter Vertical) for Stage I & for approaching Furnace/ Roof Tube/ Pendent Reheater/ Platen/FSH & Division wall (Per 6 Meter Vertical) for Stage II

Horizontal scaffolding for approaching Platen SH/SCW/ Roof Tubes/Furnace (Per 6 Meter horizontal) for Stage I & for approaching RH/ platen SH / Final SH / Divisional wall/SCW/ Roof Tubes/ Furnace (per 6 meter horizontal)for Stage II

Guard Tube and Guard Plate Removal, Fabrication and Fitting

Build up in eroded Tubes as per requirement

Repairing of skin casing

Fabrication of bends of any degree of any boiler tube

Fitting and welding of tube attachment wherever require

Membrane strip fitting & welding

Fabrication and erection of Steel items by MS plate/ MS Angle/ MS channel/ I Beam etc.

Boiler metal temp TC & mounting replace

Thermowell replacement in HP line