NCTPS II 2x600 MW MI BM Division Unit I Boiler Cleaning and Removal of accumulated ash

Amount

Boiler II pass cleaning : This work comprises of cleaning the ash in LTSH coils, economizer coils and steam cooled walls using wire brush and compressed air. Charges inclusive of consumables & T&P's.

Removal of accumulated ash in penthouse, roof, ceiling gurder and rear arch enclosure : Charges for Removal of accumulated ash inside the boiler pent house, I & II pass boiler roof, ceiling gurder, drum enclosure area between I Pass & II Pass & Rear arch area of various higher elevation of Boiler, scrapping of sticking ash from all the boiler tube surfaces skin casing top surfaces boiler tube header surfaces using scrapping plates and wire brushes, etc, inside the highly ash polluted and unapproachable pent house area. Charges inclusive of consumables & T&P's.

Loading & Transporting to the area and disposing the Ash as per the direction of Engineer-in-charge. Charges inclusive of consumables & T&P's.

Charges for complete removal of ash accumulated in boiler buck stays from 12 Mtrs to 78 Mtrs on all sides and all elevations, wind box area and burner area etc. in burner protection roof at both sides of boiler. Charges inclusive of consumables & T&P's.

Identification of ash leakage in the first pass pent house area and other areas of boiler first pass. Charges inclusive of consumables & T&P's.

Identification of ash leakage in the second pass pent house area and other areas of boiler second pass. Charges inclusive of consumables & T&P's.

Boiler outside structure water washing : Charges for cleaning of Boiler structures up to 80Mtr Elevation by water jet washing on all four sides : Charges for transportation of fire fighting hoses, nozzles, valves and other material from stores to site at various location and fitting to the site hydrant points at various elevations and cleaning of all four sides of Boiler structures, outer casing of I & II pass, floor grills upto 80mtr level and return back after completion of work. Charges inclusive of transportation, consumables and T&Ps.

Patchup Refractory : Charges for transportation of materials to work site, cleaning of patch up area and patch up of refractory in the damaged / broken up areas in rear arch slope, pent house, drum enclosure area, waterwall bottom neck area, dock house area etc., Charges inclusive of transportation, consumables and T&Ps.

Charges for Removing of caved and damaged refractory layer and insulation without damaging the adjusant deck sheets, collecting the debris in a gunny bag without polluting the surrounding and bringing down from 90 mtr to 0 mtr, transporting and dumping the debris from bioler to the dump yards as instructed by site in charge, including leading, lifting of necessary T&P's and consumables from 90 m to 0 m elevation of boiler and from boiler '0' mtr to dump yard area. (The contractor should be arrange necessary turck for the transportation).

Charges for dismantling damaged deck sheet and structural supports between damaged horizontal deck support structural channel at 88 mtr elevation at boiler pent house lowering the dismantled scrap materials from 80 mtr to 0 mtr elevation, transporting and devoluting to stores, including leading, lifting, necessary T&P's and consumables (elevation > above 50 mtr)).

Charges for leading, lifting and transporation of iron and steel materilas from store to site. Including leading & necessary T&PS and consumables ( elevatio> above 50 MTr

Charges for fabrication and erection of MS structurals and patch up work ( pent house roof strengthening and damaged skin casing sheet renewal work) including leading, lifting, necessary cost of consumables and T&P's. (elevation > above 50 mtr)).

Pourable refractory: Charges for transportatin of refractory (Pourable) materials to work site including leading and lifting of material from '0' mtr elevation to '90' mtr elevation in Penthouse top roof area, laying of fresh refractory over the newly fabricated deck sheet in between the support with support sheets with LRB wool mattress layer placed with equal distances for a thickness of 275mm. (including cost of consumables and T&ps complete).

Supply of MS sheet 3.15 mm thick Material : IS 2062 Charges including loading, transporting & unloading to stores (if the material are aviaable in NCTPS II store at time of execution it will be supplied by TANGEDCO at free of cost and it will be exclueded from contractor scope

THIAGARAJAN ENGINEERING CONTRACTOR (BID ID -1107428)