Tender For corrigendum : brought-out materials in single bid system in connection with tankage work for the 5th stream alumina refinery damanjodi, odisha and relate port facilities at visakhapatnam - 400 nb sa 105 sch std 150# sorf flange (normalised), 400 nb sch x s 90 l/r elbow, 400 nb sa 106 gr.b sch x s