Overhauling of Main Boiler Unit11

Amount

Part-A Main Boiler, Boiler Structure & D.P. Test Replacement/Overhauling of Coal & Oil Burners including air nozzle & scanner guide assembly of all the four corners (18 M/L) of boiler (3X200 MW) & 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 of 3X200 MW unit no.11

Checking and attending of spray nozzles of S/H and R/H spray (L/R)

Checking and rectification of box supports of down comers from 48 M/L to 16 M/L

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 19 M/L (L&R)

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 15 m/l and Boiler 30m/l respectively.

Painting of the above structure.

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

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

Strengthening by welding of the above joint 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)

BOILER CLEANING: Works of cleaning of boiler of Unit No.-09 (200 MW) during its proposed overhauling.

BOILER CLEANING : Disposal of ash garbage/ waste refractory from inside the Boiler and hot PA Duct to 3Km away from Power plant premises.

Part-B VALVES & SAFETY VALVES: Servicing of Feed line and Steam line gate valves viz.V2-116,V2-117,V2-85,V2-86, V2- 48/56 (L&R) and E2 etc.

Servicing of E-2 NRV (Nb-300mm, Np-250 Kg/cm2).

Servicing of boiler drum safety valves at 52meter elevation.

Servicing of safety valves installed on hot reheat, cold reheat line and main steam line on right hand side of boiler at 52meter elevation.

Servicing of safety valve on soot blower line at 52mtr elevation.

Servicing of high-pressure valve & NRV’s at different elevation from ‘0’meter level to 54meter level nominal bore may vary from Ø10mm to Ø100mm.

Servicing of L.P. Valves of Air Line, Oil Line & Water Line.

Servicing of H.O. Filter.

Replacement/Servicing of the following Actuators-V2-116& 117, V2-85 & 86, V2-48/56 (L&R), E-2 Valves.

Replacement/Servicing of the following Actuators-B-55, S-16 and soot blower isolating Valve size 65 mm.

Replacement/Dismantling and re-fitting of following sizes Valves 15 mm to 25 mm Valves.

40 mm to 50 mm Valves.

65 mm to 70 mm Valves.

100 mm Valves.

150 mm to 200 mm Valves.

Replacement/Dismantling and re-fitting of various safety valves of such as Boiler Drum/Main Steam/CRH/HRH line etc.

Welding of Main Steam Line Joint By TIG Welding.

Repairing of Main Steam Line Joint.

Welding of Cold Reheat / Hot Reheat Line.

Servicing of steam traps from ‘0’ M/L to 16 M/L of boiler in lines from 15mm to 50mm dia.

Servicing of wall blowers.

Servicing of Head valve of wall blowers.

Repairing/Replacement of worn out pipes and bends of atomizing steam, heavy oil line/water line/air line from 15mm to 40mm Nb from old & used healthy economizer pipe dia 32mm/new tracing line of 32mm/40mm. New Tracing line pipe/Old economizer pipes.

M/S ADITIYA VISHWAKARMA CONTRACTOR