NCTPS I SE MII Circle AHP Dn Unit III 2025 26 AOH BAH Dismantling and removing the 250NB 200NB 100NB 80NB and 65NB ash water header pipe line of BAH

A. Material Portion: MS, 100NB ERW pipe 4.48 mm as per IS 1239 1990 BS 1387

MS, 80 NB ERW pipe wall thick 4.48 mm as per IS 1239 1990 BS 1387

B. Labour Portion: Removing the 250NB header pipe line lowering to ground, cleaning the silt, sea growth chocked inside the pipes and checking the pipe inside surface and removing the peeled off rubber by burning cleaning the corroded 250NB pipe by buffing, grinding, inside the pipe welding the pipe and rubber lining the pipe., leading, lifting, re-positioning and re-fixing the pipe including consumables and T&P's.

Providing scaffolding, removal of 200NB damaged BAH sea water header line and erection of new/existing fabricated rubber lined pipe with flanges and necessary supports required M20X100 H.T Bolt with nut to facilitate cleaning silt and sea growth included under the scope of contractor including consumables and T&P's.

Dismantling and assembling of new 100 NB lines with proper supports including consumables and T&P's.

Providing scaffolding, dismantling the worn out M.S.80 NB pipe lines, fabrication and erection of new 80 NB pipe lines including cost of rubber lining, gasket & M16X80 bolt & nut in duct, Eco and APH hopper mixing box flushing line system including consumables and T&P's.

Dismantling the existing worn out 65 NB spool piece in ash water flushing line and then cutting the same 65 NB pipe to required size and welding the same with flanges, fixing in the ash waterline including consumables and T&P's.

Dismantling the existing worn out AHP hopper Ash discharge pipe with expansion joints and alignment checking and erection of Pipes after completion of the Boiler hopper arrangements includes consumables and T&P's.

Removal of existing eroded bed frame, fabrication and erection of new bed frame to withhold the mixing apparatus by using the channel of size 200 x 75 x 8 mm – 2.5 m. long (2 nos.) and cross support angle of size 75 x 75 x 6 mm – 1.2 m. long (2 nos.) including consumables and T&P's.

Reconditioning of worn-out 550mm dia SS 316 L mixing apparatus by replacing the worn-out 275 slurry disposal pipe in mixing box by new one including cost of SS 316L material for required size and reducing the length of 550 dia pipe to the 50mm from bottom and complete welding including consumables and T&P's.