Details: removal & installation of double disc gate valves from pipe lines and maintenance of joint of pipe line after dropping of valves:removal & installation of valves from pipelines, shifting to & from maintenance bay. maintenance of joint of pipe lines including cleaning of fasteners & faces , lapping of faces, replacement of gaskets, torquing etc. up to 2" nb 300# 3" nb 300#/400# 4" nb300#/400# 6" nb 300# 8" nb 300#/400# 10"nb 300#/400# 12" nb 300#/400# 14" nb 300#/400# 16" nb 300#/400# 18" nb 300#/400# providing temporary scaffolding including supply of material and man power by using 1-1/2" thick 6" wide wooden planks(seasoned & non-warping type)properly secured with the horizontal members (scaffolding pipe 40nb preferably)by using binding wire & maintaining plank overhang projection not more than 50 mm beyond its horizontal supports.any scaffolding such prepared must conform to is-3696-1966 and shall be subjected to check by hwp (k) safety group, before declaring it as fit for
Sector: Water Resource Department