OH Works of Main Boiler and Coal Pipes of Unit no. 12

Amount

Replacement/ Overhauling of Coal & Oil Burners including air nozzle & scanner guide assembly of all the four corners and setting of fire-ball angles

Complete overhauling of all the 52 nos. S.A. dampers in wind box at all the four corners

Fabrication and fitting of burner top/bottom casing at all the four corners

Overhauling of boiler fill pump

Overhauling of scanner fans and its dampers

Changing and repairing of railings of main boiler

Checking and attending of spray nozzles of SH and RH spray (L and R)

Checking and rectification of box supports of down comers from 48m to 8m elev.

Complete Overhauling Boiler Drum internals

Repairing of man holes of Boiler

Replacement of packing of man holes

Repairing of Boiler Peep holes

Replacement of packing of boiler peep holes

Alignment and fixing of supports of hot air ducts

Rectification of hinge supports of wind box of boiler at 19m elev (L&R)

Hard Facing of Coal nozzle casting

Work of Repairing and Servicing of CBD (Continuous Blow Down) expander tank & safety valves with replacements of H.P./L.P. valves

Erection and fabrication of new structure and platforms behind APH and Economizer at Boiler 15m elev and Boiler 30m elev respectively

Painting of the above structure (s.no. 18)

Fitting of new grills by replacements

Strengthening of Structural Horizontal/ Vertical/ Inclined Beam by welding stiffeners at every 01 meter over whole beam on both sides and additional plates of the same thickness on both sides of all web and flanges

Correction of Sagged/ Bowed Beams by cutting and replacement of the same thickness

Cleaning, Shielding by Plate and Painting of Intersection of Inclined and Vertical Columns of Boiler Structure

Strengthening by welding of the above joint (s.no. 23) at Inclined and Vertical Columns of Boiler Structure

Complete repairing of hydraulic seal system

Replacement of high pressure steam/ feed line/ EBD/ CBD/ S.H.Spray Line/ R.H. spray line bends at different elevations

D.P. tests for dissimilar in Re-heater, stub joints, PSH stub etc. up to dia Size 127 mm

D.P. test of joints of critical pipes. (Main Steam/ CRH/ HRH Line/ Link lines)

Works of cleaning of boiler during its overhauling

Disposal of ash garbage/ waste refractory/ insulation from inside the Boiler and hot PA Duct to 3 km away from Power plant premises

Repairing/rectification of Flue gas/ SA/Hot PA Duct by replacement and Fitting of Guide Plate in Flue gas/ SA/Hot PA Duct with Plate Fabrication, plate size 5/6mm by double coat welding and ATT

Repairing/rectification of Flue gas/ SA/Hot PA Duct by double coat welding

Repairing of burner coal inlet elbow

Hard facing of repaired coal inlet elbow

Changing/dismantling & refitting of straight coal pipe at different elevation

Changing/dismantling & refitting of coal pipe bends long/short

Turning the straight coal pipe through 180º

Repairing of coal pipe bends long/ short

Replacement of VC coupling gasket

Changing/dismantling & refitting of mill outlet elbow

Repairing of mill outlet elbow

Hard facing of mill outlet elbow

Providing new/fabricated/repaired flange ring

Repairing of coal pipe flange

Changing of orifice plate

Replacement/repairing of coal pipe hanger

Repairing of coal pipe supports

Providing cleat on both end of bends

Changing/dismantling & refitting of Transition piece

Repairing of transition piece by cutting welding & hard facing

Checking and cleaning of coal pipe for its choking

SHAKSHI ENGINEERING CO.