labour contract for co-gen boiler economizer coil tube repair and reconditioning.; cogen boiler economizer coil complete dismantling from position,from inlet header to outlet header,removal of all old welding joints,edge preparation,new rewelding is to be done of the same and repair,fabrication and erection of the same as per the drawing and as per existing,pre hydro test of the same is to be done before erection.after fabrication,erection,final hydro test is to be conducted by director of boilers under contractor scope along with all the welding joints radiography test.inclusive of duct line removal and re erection along insulation and gladding works & getting approvals from director of boiler under ibr regulations