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

Amount

Boiler water washing and cleaning: i) Cleaning of boiler by water washing: This work involves complete water washing of boiler water walls in all the 4 sides, re-heater coils, platen SH coils and radiant roof. Charges inclusive of consumables & T&P's.

ii) Cleaning of boiler I pass (with sky climbers): Cleaning boiler water walls and platen SH coils scrubbing with wire brush using sky climbers. Charges inclusive of consumables & T&P's.

iii) 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.

This works involves 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.

Erection & dismantling of One No of sky climbers: This works involves transporting of sky climber components, platforms materials to boiler area, erection and commissioning of sky climbers inside the boiler. Charges inclusive of consumables & T&P's. i) Erection and dismantling of platform:

ii) Charges for one No of sky climber erection and dismantling: Erection and dismantling of one No of sky climber

iii) Charges for shifting of sky climber: Shifting of sky climber inside the furnace to cover other sides.

iv) Operation of sky climbers: Operation of 4 nos sky climber in a shift is required for assisting various overhauling works such as cleaning, inspection, tube thickness survey, tube rectification and burner overhauling etc.,

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 waterwashing : 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.

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).

Cutting and removing of damaged deck sheet and structural supports between damaged horizontal deck support structural channel at 9mtr elevation at boiler pent house around Re-heater rear outlet header area and mobilizing them from 90 mtr to 80 mtr inside the pent house area, 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 (The contractor should be arrange necessary truck for the transportation).

Charges for fabrication and erection of MS structurals and patch up work including cost of consumables and T&P's.

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).

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.

Supply of MS sheet 3.15 mm thick Material : IS 2062 Charges including loading, transporting & unloading to stores

THIAGARAJAN ENGINEERING CONTRACTOR (BID ID -1067449)