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| 1 | Overhauling of Flue Gas Duct and Air Duct | Overhauling of Flue Gas Duct and Air Duct |
| 2 | Repair of Flue Gas Duct/Air Duct by Patching / Grafting | Repair of Flue Gas Duct/Air Duct by Patching / Grafting |
| 3 | Replacement of beams / channels inside ducts | Replacement of beams / channels inside ducts |
| 4 | Gas cutting of MS / SAIL hard/ Steel Plate (3.15 to 20mm) | Gas cutting of MS / SAIL hard/ Steel Plate (3.15 to 20mm) |
| 5 | Welding of MS / SAIL Hard/ Steel Plate ( 3.15 to 20mm) | Welding of MS / SAIL Hard/ Steel Plate ( 3.15 to 20mm) |
| 6 | Overhauling of Gate /Damper of Duct and Replacement of Bracing Pipe & Fabrication/ Repairing of Diversion Post and other Repairing/Patching work of associated gate/damper | Overhauling of Gate /Damper of Duct and Replacement of Bracing Pipe & Fabrication/ Repairing of Diversion Post and other Repairing/Patching work of associated gate/damper |
| 7 | Overhauling of Primary outlet gas distribution dampers of after APH of flue gas path, 500MW 4th unit | Overhauling of Primary outlet gas distribution dampers of after APH of flue gas path, 500MW 4th unit |
| 8 | Replacement of Primary outlet gas distribution damper flap with new one | Replacement of Primary outlet gas distribution damper flap with new one |
| 9 | Overhauling of Secondary outlet gas distribution dampers of after APH of flue gas path, 500MW 4th unit | Overhauling of Secondary outlet gas distribution dampers of after APH of flue gas path, 500MW 4th unit |
| 10 | Replacement of Secondary outlet gas distribution damper flap with new one | Replacement of Secondary outlet gas distribution damper flap with new one |
| 11 | Servicing of Discharge/Suction Damper of FD/PA and Primary, Hot / Cold Air Damper | Servicing of Discharge/Suction Damper of FD/PA and Primary, Hot / Cold Air Damper |
| 12 | Replacement of flap of Discharge/Suction Damper of FD/PA and Primary, Hot/Cold Air Damper with new one | Replacement of flap of Discharge/Suction Damper of FD/PA and Primary, Hot/Cold Air Damper with new one |
| 13 | Overhauling / Servicing of Guillotine gate 500MW | Overhauling / Servicing of Guillotine gate 500MW |
| 14 | Repairing of Side Wall, Roof & Floor of Primary/ Secondary gas Distribution area from APH to Common Duct of Primary/Secondary (From 3.15 mm to 20 mm Plate) | Repairing of Side Wall, Roof & Floor of Primary/ Secondary gas Distribution area from APH to Common Duct of Primary/Secondary (From 3.15 mm to 20 mm Plate) |
| 15 | Steel Fabrication & Erection of Diversion Post / Plate form etc. | Steel Fabrication & Erection of Diversion Post / Plate form etc. |
| 16 | Dismantling of Steel structure of Duct | Dismantling of Steel structure of Duct |
| 17 | Replacement of Bracing Pipe / protective angle (Up to 6 Meter) | Replacement of Bracing Pipe / protective angle (Up to 6 Meter) |
