Procurement of 7 312304137302 ss pipe od13 7x3 02tkx6000 sch 80s sa312tp304 ibr as per unpriced bid, 8 312304213373 ss pipe od21 3x3 73tk sch 80s sa312tp304 ibr as per unpriced bid, 4 156075340000 pipe od 273 x 9 3 sa312tp321 non ibr as per unpriced bid and other related items