supply and application of insulation and allied material on boilerand its auxilliaries turbine piping and equipments at ggsstp 4x210mw units- 1 supply & application ( including removal of damaged insulation ) of lightly resin bonded rockwool confirming to is 8183 latest versionon all types of surface of ducts, pipes, tubes, bends of following sizes. ( single layer ) 2 75mm thick mattresses density 120kg / m3 3 50mm thick mattresses density -do- 4 40mm thick mattresses density -do- 5 50mm thick mattresses density 150kg / m3 6 supply & application ( including removal of damaged plaster ) of 12mm thick hardsetting plaster comprising of asbestos powder and cement over insulation of steam lines 7 supply & application of plain gi sheet ( 24 gauge ) sheet confirming to is 277 latest version, over insulation to be screwed on the m.s.flat ring with self tapping screws duly joint sealed with sealant & 2 coats of bitumestic paint in inside portion of sheet including any welding work and hardware etc 8 supply & application of corrugatedg.i. sheet ( 24 gauge ) sheet. 9 removal of al / gi / ribbed sheet etc. ( all thickness ) from all types of ducts, pipes, tubes, dampers and bends etc 10 application of useable dismentled gi / al / ribbed sheet over insulation to be screwed on the ms.flat rings with self tapping screws duly joint sealed with sealant 11 screwing, sealing & resetting of already existing al / gi / ribbed sheet including any welding work and hardware etc 12 to remove, supply and application of pad insulation, then to be covered with gi sheet of 26 swg thickness ( gi sheet also to be supplied by contractor ) for tg piping & equipment of following thickness: 13 i ) 60mm thickness 14 ii ) 120 mm thickness 15 iii ) 180 mm thickness 16 supply & application of new g.i. sheet of 26 swg over the existing insulation 17 to remove existing insulation then supply & application of pad insulation only for tg piping & equipment of following thickness: 18 i ) 60mm thickness 19 ii ) 120 mm thickness 20 iii ) 180 mm thickness 21 application of reusable removed gi sheets from turbine piping equipment at ggsstp 22 repair of spray insulation of hpt, ipt and governing valves casings by supply & application of material. 23 covering insulation mattresses with hard setting plaster comprising of asbestos fluff and cement by supply & application of material.