Procurement of ss spectacle blind flange 3 by 4 inches class 300rf as per item no 7 of boq, flange 3 by 4 inches 600 wnrj 80s ss316l nace plus h2 as per item no 1 of boq, flange 1 inches 1500 class wnrj sch80s ss316l plus igc as per item no 4 of boq and other related items