MTPS I BM Unit IV Rotating parts Annual Maintenance 2022 23 Removal and renewal of insulation in FG ducts Air Ducts and Air Pre Heaters

Amount

Providing scaffolding arrangement at Boiler area for removal and re-insulation.

Removal of insulation wool mattress and putting back with new / same wool mattress at the plain portion of the flue gas duct.

Removal of deteriorated G.I sheets and re fixing the new / same G.I. sheets after making grooves and tightening with lock screws (1/4”) at the plain portion of the flue gas duct.

Removing the GI strips and retainer plates and providing back with new / same strips and retainer plates.

Removal of insulation wool mattress and putting back with new / same wool mattress after cutting to the required contour shape.

Removal of deteriorated G.I sheets and re fixing the new / same G.I. sheets after making grooves and tightening with lock screws (1/4”)

Material charges: GI Plain Sheet 0.63 mm Thick As per IS 277, 120 gm/m2 of Galvanized coating, Class-VIII (Size-2500 X 1000 X 0.63 mm)

LRB Wool mattress 60 mm thick ,Size 1.52 m X 1.22 m X 60 mm thick confirming to IS-8183-1993.Density150 Kg/M³ with machined on both sides 0.75 inch X 23 SWG G.I wire knitting.

Consumables and T&Ps for item S.no.1 to 6