NCTPS I SE MI circle Boiler Maintenance Division Annual Overhaul works for the year 24 25 Specification No 222 24 25

Amount

Carton Steel plate 3.15 mm thick, IS 2062, grade A including loading, transporting and unloading. (Supply to the NCTPS stores. The contractor should inspect the site in overhaul to ascertain the actual requirement of Iron & Steel material and as per the direction of Engineer in charge. The materials will be supplied by TNPGCL if available at stores during execution of works)

SS Wire Mesh size: L 2500 mm x W 750 mm x weaving square gap – 16 33 Material: SS316 (Supply to the NCTPS stores. The contractor should inspect the site in overhaul to ascertain the actual requirement of Iron & Steel material and as per the direction of Engineer in charge. The materials will be supplied by TNPGCL if available at stores during execution of works)

Providing scaffolding at HRH slope, ECO 9th header and ECO expansion at 26 Mtr elevation, 4 corners at 16 mtr elevation & S panel for refractory chipping and laying work above. Charges inclusive of consumables and T&P’s.

Refractory / Portable: Charges for chipping removal of old defective refractory / portable cleaning, surface preparation, mixing the refractory with water application and curing the patch worked refractory in Boiler and transporting the refractory from stores and unloading at site, leading, lifting, stacking at 0 mtr to 42 mtrs elevation of boiler and removing the waste refractory from boiler lowering to the ground floor, loading to tipper and disposing at waste disposal area, including consumable and hire charges for T&P's. (Refractory will be supplied by TNPGCL).

Renewal / rectification of 4 Nos of corner at 16 mtr elevation and damaged portion of HRH slope area fabrication, lifting, positioning, aligning and welding as directed by the field engineers, including of paints, consumables and T&P’s and drawal of materials from stores etc.

Skin casing welding and patch up work in 4 corners in 16 mtr at 1st pass area (This work involves removing, cutting the damaged existing skin casing sheet wherever required, welding with new skin casing sheet). Charges inclusive of consumables and T&P’s.