bids are invited for custom bid for services - introduction of 200nb x 100mm length pipe spool on all four steam generator 90% boiler feed line during kgs#1 emccr - introduction of spool piece as safe end on 90% feed water nozzle of kgs#1 of steam generators during emccr which includes cutting, grinding, edge preparation, fitup and welding of csxcs/ssxss/csxss/ chrome-moly x chrome-moly/chrome-moly x cs; butt weld/nozzle joints with or without consumable insert by gtaw, gtaw+smaw process, ndt testing,pre heating, post weld heat treatment, welding procedure qualification at shop with specimen test at laboratory, technical specification as mentioned in annexure-i including welding consumables & machines (except argon, acetylene & oxygen gas). working area zone - iv of controlled and supervised area.