NCTPS I SE MI circle Boiler Maintenance Division Annual Overhaul work for the year 25 26 Specification No 228 25 26

U - Clamp

Cotter Pin M 39 X3X175 MM, HT Head Bolt (Half Thread) with Spring and Washer.

Channel Size:140 mm x 100 mm x 1000 mm carbon steel

Corton Steel Plate 3.15 mm Thick

Super castable refractory Tricast CC70 Super-1450 Application Temperature: 14500C Maximum grain size: 5 mm Water Required for casting: 10-12% Make: PKV refractory / Madras Refractory/ Total globe or equivalent.

Charges for leading, lifting and arranging platform and scaffolding in platen SH coil to facilitate rectification of sagged Radiant roof tubes and dismantling after completion of work. Including consumables and hire charges for T&P’s.

Charges for bending of plates :Drawal of 3.15 / 10 mm M.S plate from central stores transporting the materials to outside workshop cutting in to required size, bending to the required size and profile, transporting back to NCTPS boiler area.

Charges for renewal of sagged radiant roof tubes of size 51 mm X 5 mm (above 44.5 mm dia) inclusive of cutting,lifting,hot correction,welding and locking its original position (Required tubes will be supplied by TNPGCL)

Charges for fin welding: Charges for fin welding along the spool piece of radiant roof tubes by cleaning, surface preparation and welding. Including consumables and hire charges for T&P’s.(Required tubes will be supplied by TNPGCL)

Charges for Cutting and removal of existing damaged / erroded fabricated channel in penthouse at 52mtr level and devolution of the retrieved material to stores and rectification of damaged eroded fabricated channel in penthouse using new fabricated channel and patch up work, arresting the 'U' clamp, inserting peg pins in the radiant roof tube and welding with supporting channel in the boiler - Ist pass. Including cost of consumables and T&P’s.