annual rate contract for attending boiler tube leakage and other allied works at stps . , monthly assured amount for lumpsum scope , radiography of welding joint as per , dismantling & lifting of ltsh module , dismantling & lifting of economiser , stress relieving as per schedule , fins fitting & running welding at new , rectification of buck stay at different , welding of economiser tube ( 38 . 1x4 mm ) , welding of ltsh tube ( 47 . 63x5 mm ) , welding of water wall tube ( 63 . 5x5 . 6 and , welding of platen/fsh tube , welding of reheater tube ( 63 . 5/57/54x4 , repairing of header by build up , high pressure welding of more than 63 . 5 , fabrication of different size bend , boiler 2nd pass water cleaning , pent house cleaning , replacement of hp valve size above 25 mm , replacement of hp valve size above 50 mm , replacement of hp valve size above 100 , ex-bhel expert for safety valve , seat cutting expert along with seat , de-insulation & re-insulation of boiler , de-insulation and reinsulation of steam , de-insulation and reinsulation of steam , de-insulation & re-insulation of valve , de-insulation & re-insulation of valve , removal and re-application of refractory , ash cleaning work from boiler buckstay/ , ash cleaning works from pa duct/fd duct/ , high pr . welding above 25 nb and upto 65 , high pr . welding above 65 nb and upto 80 , high pr . welding above 80 nb and upto , high pr . welding above 100 nb and upto , high pr . welding above 150 nb and upto , high pr . welding above 200 nb and upto , high pr . valve replacement , upto 50 nb , high pr . valve replacement , 250 nb , welding of turbine lub oil line upto , welding of turbine lub oil line from 50 , radiography of joint as per schedule , stress relieving as per schedule , de-insulation and reinsulation of steam , de-insulation and reinsulation of steam , de-insulation & re-insulation of valve , de-insulation & re-insulation of valve , boiler metal temp tc & mounting replace , thermowell replace in high pr lines , replace of high pr . v/vabove 25 to 50 nb , radiography of joint as per schedule , stress relieving as per schedule