rc for attending boiler tube leakage and other allied works and high pressure welding jobs at stps . , monthly amount for lumpsum scope of work done by 01 no . hp welder , 5 no . non agreemental skilled worker with 02 no . supervisor under supervison of agency . , radiography joint as per schedule , dismantling/ lifting of ltsh coils & placed in position after repairing . , dismantling/ lifting of economiser coils & placed in position after repair , fins fitting & running welding at new insert position of water wall / steam cool wall etc . , stress relieving as per schedule , refractory work inside boiler different headers and guard plate . , rectification of buck stay , correction of buck stay of 2nd pass , welding of economiser tube , ( 38 . 1 mm x 4 . 0 mm ) , welding of ltsh tube , ( 47 . 63 mm x 5 . 0 mm ) , welding of steam cool wall , hanger , steam coll spacer tube ( 44 . 5x4 . 5/5 mm ) , welding of water wall tube ( 63 . 5x5 . 6 mm ) , welding of fsh/psh tube , ( 47 . 63 mm x 5/6/8/10 mm ) , welding of reheater tube , ( 63 . 5 mm x 4 . 5 mm ) , repairing of header by build up , high pressure welding of more than 63 . 5 mm dia pipe , fabrication of different size bend . , pent house cleaning , boiler 2nd pass cleaning , removal of insulation and reinsulation during btl & opportunity period , high pr . welding above 25 nb and upto 65 nb diameter pipe at different position , high pr . welding above 65 nb and upto 80 nb diameter pipe at different position , high pr . welding above 80 nb and upto 100 nb diameter pipe at different position , high pr . welding above 100 nb and upto 150 nb diameter pipe at different position , high pr . welding above 150 nb and upto 200 nb diameter pipe at different position , high pr . welding above 200 nb and upto 300 nb diameter pipe at different position , high pr . valve replacement , upto 50 nb , high pr . valve replacement , upto 250 nb , welding of turbine lub oil line upto 50 nb diameter . , welding of turbine lub oil line from 50 nb to 100 nb diameter pipe at different place , boiler metal temperature measuring thermocouple with mounting arrangement replacement . , thermowell replacement in high pressure line .