AHP Dn UNIT II (AOH) work A Pass Renewal of existing corroded and damaged Bottom Ash Hopper Seal Trough supporting structure and seal Trough approach

Amount

Material Portion: Castable refractory

SS plate 6mm thick

M.S plate 6mm thick

16mm thick liner plate SS

25NB SS pipes

SS Bend 1 inch, SS 90 Deg OD 33.4 X 4.5 Deg mm thk

SS Flange 25NB ID-34.5 OD-108 PCD-79.4 Tk-17

Charges for dismantling pulling out the service and stand by scrapper feeders away from BAH area for replacement of seal trough and its supporting structure during overhauling works including Consumables and T&P's.

Charges for scaffolding up to 5m elevation all four side in BAH for carrying out the works such as dismantling, fabrication & erection of seal trough supporting structure in BAH @5m elevation to mount the seal trough, vertical supporting column and standing platform in BAH etc., including Consumables and T&P's.

Charges for dismantling and assembling of 100 NB ring header pipe lines with proper supports after carryout the fabrication & erection of seal trough and its supporting structure works including Consumables and T&P's.

Charges for arresting the BAH structural in the vertical beam of height '5mtr' this works involves shifting, lifting, leading of fabricated temporary supports to the respective BAH supporting structure and positioning leveling in the ground ,aligning with the BAH structure, ensuring resting of BAH in the temporary supports including Consumables and T&P's.

Dismantling the damaged SS seal trough supporting structure and BAH @5mtr elevation, work involves arresting , cutting ,leading and removal of seal trough supporting structure and bottom ash hopper as directed by the engineer in charge, including transportation, crane, winch, T&P's, consumables & devoluting the retrieved BAH structural scrap.

Charges for erection & welding of SS seal trough in seal trough in BAH @ 5mtr elevation as per the standard chipping and cleaning and inspection for leaks including Consumables and T&P's.

Leading, lifting and Transportation of Iron and steel materials,from stores to site,including hire charges for mobile crane including consumables and T&P's.

Fabrication and erection of seal trough supporting structure and bottom ash hopper at 5 metre elevation to mount the seal trough over the Bottom Ash Hopper.Including cost of consumables and T&P's.

charges for Making the 25 NB hole in the ring header pipe top side and 25 NB pipe with flanges to be fabricated and welded in both sides and then connected with the required length pipe, bend and flanges including consumables and T&P

Cutting and removal of the corroded bottom ash hopper ash discharge gate mounting frame ( I beams) with SS liner plate 16 MM thick, surface preparation and leveling of bottom portion by grinding, fabrication of new frame of size 1700 x 1400 mm using 12mm M.S.Plate drilling of dia 24 holes 18 nos, lifting the frame marking, positioning,allignment checking with hopper bottom and then welding 10 nos. rib supports fabrication using 12mm M.S.Plate and welding with frame and re-fixing the SS 316L liner plates after fabrication into the bottom of the mounting frame and welding including consumables and T&P's.

Charges for cleaning and One coat Red oxide painting two coats of enamel paint over the seal trough supporting structure, BAH vertical column and standing platform paint, consumables and T&P's.

Applying refractory inside Bottom Ash hopper including consumables & T&P's.

Transportation of refractory from central stores including consumables & T&P's.

Charges for erection and dismantling of Scaffolding arrangement including consumables & T&P's.

Charges for transporting pulling back the service and stand by scrapper feeders near by BAH area after completion of seal trough and its supporting structure, BAH vertical column and standing platform during overhauling works including Consumables and T&P's.

SRI RAGAVENDRA ENTERPRISES