supply of galvanized steel pipes & tubes isi marked, length 6 meters, , galvanized steel pipes & tubes isi marked, length 6 meters, screwed at both ends, sock eted at one end and other end screwed protected with plastic protector, nominal bore dia. 40 mm, med ium class. sockets shall also be isi mark. material and specification -- is:1239 (pt. 1): 2004 (rev. 6) , a mend. no. 6 of june 2021 or latest for tube; is: 1239 (pt. 2): 2011 (rev. 5) , amend. no. 3 of march 201 6 or latest for socket; and is: 554:1999 (rev. 4) , amend. no. 1 of oct. 2009 or latest for screw. [ war ranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]