supply of galvanised mild steel tubes electricalgalvanised mild steel tubes electrical, galvanised mild steel tubes electrical resistance welded ( erw ) / high frequency induction welded ( hfiw ) / hot finished welded ( hfw ) conforming to is.1239 ( part-1 ) / 1990 ( fifth rev ) with amdt no 1 to 5 screwed at both ends as per is.554 / 1985 socketed at one end and other end protected with plastic thread protector.the socket conforming to is.1239 ( part-ii ) / 1992 ( fourth rev ) with amdt no.1 in random length of 4 to 7 mtrs. g.i pipe shall be duly isi marked as per statutory requirement nominal bore dia is 40mm medium grade. is 1239-68 part i. csd / per , sr tamil nadu 3294.00 metre