supply of galvanized steel tubes- nominal bore 50mm, medium class, erw/hfiw/hfw - quality and random length 4 to 7 mtrs. conforming to is: 1239 ( part 1 ) - 2004. screwed at both the ends and socketed at one end & other end protected with plastic thread protector to is: 554 / 1999. socket conforming to is: 1239 (part 2) - 2011. g.i pipe shall be duly isi marked.galvanized steel tubes- nominal bore 50mm, medium class, erw/hfiw/hfw - quality and random length 4 to 7 mtrs. conforming to is: 1239 ( part 1 ) - 2004. screwed at both the ends and socketed at one end & other end protected with plastic thread protector to is: 554 / 1999. socket conforming to is: 1239 (part 2) - 2011. g.i pipe shall be duly isi marked.,galvanized steel tubes- nominal bore 50mm, medium class, w/hfiw/hfw - quality and random length 4 to 7 mtrs. conforming to is: 1239 ( part 1 ) - 2004. screwed at both the ends and soc keted at one end & other end protected with plastic thread protector to is: 554 / 1999. socket confor ming to is: 1239 (part 2) -2011. g.i pipe shall be duly isi marked. [ warranty period: 30 months afte r the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]