NCTPS I SE MI circle Boiler Maintenance Division Annual Overhaul works for the year 24 25 Specification No 238 24 25

Amount

Carton steel of 6 mm thick Including loading, transporting & unloading charges. (Material portion under Contractor scope: 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 material will be supplied by TNPGCL if available at stores during execution of works)

EN -8 ROD

Stuffing box for SADC shaft damper

Labour Portion for erection, testing and commissioning of Wind box secondary air control in corner 3 Providing scaffolding arrangement at Boiler area including consumables and T&P's.

Erection, commissioning and testing of wind box secondary air damper control with suitable power cylinders for coal, oil and air compartments for Corner 3 Cutting and removal of the existing damaged wind box SADC damper assembly at corner from 18mtr elevation to 27 mtr elevation after providing necessary support and devolution the retrieved material to stores. Including consumables and T&P's.

Erection, commissioning and testing of wind box secondary air damper control with suitable power cylinders for coal, oil and air compartments for Corner 3.Lifting and leading of new wind box SADC damper assembly at corner from 0 mtr elevation to 27 mtr elevation. (Louver Damper assembly for SADC for Corner 3 will be supplied by TANGEDCO) including consumables and T&P's.

Erection, commissioning and testing of wind box secondary air damper control with suitable power cylinders for coal, oil and air compartments for Corner 3.Positioning of new wind box SADC damper assembly at corner from 18mtr elevation to 28 mtr elevation and full welded with suitable welding electrodes and commissioning & testing of wind box secondary air damper control with suitable power cylinders. Including consumables and T&P's

Revamping of SADC damper internals in corner 1, 2 & 4 Charges for fabrication of New air damper by sizing, bending of carbon steel plate of 8 / 6 mm thick, 25 mm of EN8 pipe sizing, hinge plates, link plate, arresting plates etc., drilling and welding the arresting plate, hinge plate suitability as per the released sample.(2Nos of Moving plate & 1 No fixed plate) including consumables and T&P's.

Revamping of SADC damper internals in corner 1, 2 & 4 Charges for cutting removal of worn out air dampers fixed & moving blades, shaft, preparing air compartment, Fixing shaft and damper blades, welding shaft with moving blade and making proper alignment and checking for free operation. (2 Nos of Moving plate & 1 No fixed plate) including consumables and T&P's.

Charges for cleaning the accumulated ash deposits over the Wind box Top left & Right side. Inspection, rectification of eroded portions in wind box and assisting for air leak test. Charges for inspection and marking the flue gas/hot air leakage point in wind box and rear arch room area. Including consumables and T&P's.

Charges for cleaning the accumulated ash deposits over the Wind box Top left & Right side. Inspection, rectification of eroded portions in wind box and assisting for air leak test. Charges for removing the eroded portions in wind box and welding with new plates inclusive of transportation, lead and lift, scaffolding arrangements, etc. including consumables and T&P's.

S.MATHURAM CONTRACTOR (BID ID -1241771)