OT 10

Amount

Cleaning of tubes by buffing wheel to facilitate tube thickness survey at boiler II pass and other areas wherever required.

Providing the assistance for Boiler tube thickness survey in the boiler pressure parts.

Conducting tube thickness survey in boiler pressure parts including the hire charges for ultrasonic thickness gauge (Where thickness survey cannot to be taken, erosion should be checked by visually and physically)

Cleaning of tubes by buffing wheel to facilitate tube thickness survey at final reheater & Primary reheater from 63 mtr to 73 mtr elevation and other areas wherever required.

Providing the assistance for Boiler tube thickness survey final reheater & Primary reheater from 63 mtr to 73 mtr elevation in the boiler.

Conducting tube thickness survey final reheater & Primary reheater from 63 mtr to 73 mtr elevation in the boiler including the hire charges for ultrasonic thickness gauge. (Where thickness survey cannot to be taken, erosion should be checked by visually and physically)

Checking / Replacing / reconditioning the Shrouding plates with fixing clamps by welding at both sides of the tubes in the 2nd pass area, which includes LTRH,LTSH and Economizers.

Arrangement of platform and scaffolding materials and erection of the same wherever required in the boiler area for tube rectification work / hydro test and transporting the scaffolding materials.

Renewal of defective boiler tubes of size 44.5mm OD inclusive of transportation, cutting of defective tubes, edge/spool preparation, welding with IBR welder, cost of Argon gas, cutting gas, all consumables, T&P's, hire charges for welding generator, TIG set and etc.

Cutting the worn out tubes of tube dia above 44.5mm, & up to 63.5X5.2mm edge preparation of the new & existing tubes, positioning the tubes with proper alignment, TIG and ARC welding the joint with IBR welder, cost of Argon gas, cutting gas, all consumables, T&P's, hire charges for welding generator, TIG set and etc.

Surface preparation & metal Filing by arc welding to the required thickness in the eroded portions of the boiler tubes by the IBR welder including the cost of Welding electrodes & hire charges for welding generator & other T&P's etc. Welding of size up to 150x25-mm

Lowering the coils for cutting, grinding and welding with providing proper chain block support and lifting the same coils after completion of works including the charges like consumables, T&P's and etc.

Providing Platform arrangement at 3 levels entire length of width 20m (60.0m, 64.0m and 67.0m) for thickness survey, renewal of defective boiler tubes, strengthening / Reconditioning the welding with clamp and to reinstate the dislodged shrouding again in Final reheater tubes with horizontal bend in 35 degree slope of goose neck water wall from 64mtr level to 57mtr level, by following highest safety standards including charges for transportation and leading lifting of scaffolding materials to boiler required area, hire charges for T&P's etc.

Restoring / Reconditioning of shrouding of various lengths of straight / bend in final super heater & Final reheater in the interpass slope area and retrieving the fallen shrouding plate, including charges for consumables, SS welding rods, hire charges for T&P's etc.

Fin welding including the cost of Welding electrode, all consumables, hire charges for welding generator & other T&P's etc.

Removal of insulation double layer (60mm + 60mm = 120mm thick) from Boiler elevation and refixing after completion of rectification works.

KUMAR ERECTORS (BID ID -1068315)