NCTPS I SE M II Circle AHP Dn Unit I 2026 27 AOH BAH Dismantling and removing the 250 NB 100NB 80NB and 65 NB ash water header pipe line of BAH and ESP and renewal of its worn out supporting structures

I. Material portion (Contractor scope): MS Seamless Pipe, 100 NB ASTM SCH 40 ANSI B36.10

MS Seamless Pipe, 80 NB ASTM SCH 40 ANSI B36.10

MS Seamless Pipe, 65 NB ASTM SCH 40 ANSI B36.10

II. 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.

Dismantling and assembling of 100 NB lines with proper supports this work involves, cutting and dismantling of existing stream wise layed 100 NB branch header pipes after dismantling 65 NB sub branch header pipes, fabrication & erection as row wise. 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 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 including 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/890 mm dia SS 316 L mixing apparatus by replacing the worn-out 275 slurry disposal pipe in mixing box reducing the length of 550dia pipe to the 50mm from bottom and complete welding including consumables and T&P's.