tender for charges for loading and unloading of 300 nb m.s erw pipe of size 6/12 meters length required for replacement of corroded/ eroded blow down pipe in the existing hot water basin header on the eastern side of cooling tower-i from ash handling pump house to cooling tower-i and devolution of the removed corroded/ eroded pipe to central stores.(for loading & unloading crane will be supplied by tnpgcl at free of cost). , hire charges for heavy machineries (poclain vehicle) for cleaning the bushes, excavation of plain cement concrete concrete, soil to remove the 350nb pipe corroded/eroded pipe laid underground and after laying new pipe line the excavated soil, plain cement concrete concrete are to be leveled using the heavy machineries as like the area before excavation. , charges for providing & dismantling of scaffolding & platform arrangements required for dismantling of corroded/eroded 350 nb m.s erw pipe and laying the pipe of size 300nb pipe in the eastern side in the existing hot water header pipe at 11 m height in cooling tower-i by using steel pipes.(required scaffolding materials and its transportation to work spot from outside mtps-i are under contractor scope). , charges for dismantling of 350 nb worn-out ms erw pipe from the existing pipe line by marking & cutting etc., , charges for cutting, grinding, edge preparation, erection, laying, positioning and welding of 300nb ms erw pipe line at 11 mtr height parallel to cooling tower wall & underground area along with supports which includes fabrication of supports using available ms angle.(300 nb ms erw pipe will be supplied by tnpgcl). , charges for fabrication of required size of bend as per site condition using 300 nb ms erw pipe by marking, cutting, edge preparation and welding, erection and welding with newly laid 300nb erw pipe. , charges for fabrication of 350nb to 300nb reducer in the existing hot water blow down line at cooling tower-i, erection and welding with newly laid 300nb erw pipe. , char