dismantling and replacement of c i / ss pipes and fittings in sa / pa plants , fact cd . , dismantling and replacement of c i / ss pipes and fittings in sa / pa plants , fact cd . , replacement of c i pipes & fittings: collecting and transporting of cast iron pipes , fittings , valves , strainers etc of sizes from 40 nb to 700 nb from stores / plant area . dismantling the damaged piece / fttings after getting clearence , erection of the pipe lines / fittings with new gaskets , bolts and nuts as per instruction of engineer in charge which includes fabrication of filler pieces with ss material - wherever necessary . clear the site after work and transport the damaged piece to scrapyard . , replacement of flange gaskets: collect and transport the required materials for the work . after getting process clearence , remove the damaged flange gasket of pipes sizes varies from 40 nb to 700 nb , fittings , valves , strainers etc , clean the faces of the flanges and tightened the flanges with new gaskets , bolts and nuts as per instruction of engineer in charge . , covering of flange joints with lead sheet: work involves : collection of required materials from the stores , cutting the lead sheet in required sizes and covering of the flange joints with the lead sheets . , cleaning of acid strainers : work involves : removal of acid strainers from the line , gasket cutting , cleaning of flange faces and assembling the strainers back to the line after necessary cleaning from process department .