supply of galvanized steel pipes & tubes isi marked in length of 6 meters,galvanized steel pipes & tubes isi marked in length of 6 meters,,galvanized steel pipes & tubes isi marked in length of 6 meters, screwed at both ends, s ocketed at one end and other end screwed protected with plastic protector, nominal bore dia. 50 mm, medium class. sockets shall also be isi mark. material and specification - is: 1239 (pt. 1): 2004 (rev. 6) , amend. no. 6 of june 2021 or latest for tube; is: 1239 (pt. 2): 2011 (rev. 5), amend. no. 3 of march 2 016 or latest for socket; and is: 554:1999 (rev. 4) , amend. no. 1 of oct. 2009 or latest for screw. [ w arranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ] new general stores depot/kgp, west bengal 1000.00 metre