Gem Bids For 250 Nb, 9.5 Mm Thick Ms Erw Or Saw Pipes Of Grade Fe410 As Per Is 3589 Or Api-5l Gr. B , 400 Nb, 7.1 Mm Thick Ms Erw Pipes Of Grade Fe410 As Per Is 3589 , 450 Nb, 7.1 Mm Thick Ms Erw Or Saw Pipe Of Grade Fe410 As Per Is 3589 , 500 Nb, 8.8 Mm Thick Ms Erw Or Saw Pipe Of Grade Fe410 As Per Is 3589 , 500 Nb, 9.5 Mm Thick Ms Erw Or Saw Pipes Of Grade Fe410 As Per Is 3589 Or Api-5l Gr. B , 650 Nb, 8.8 Mm Thick Ms Erwor Saw Pipe Of Grade Fe410 As Per Is 3589