... carbon steel pipes aaMaterial: ASTM A106B, ASTM A 53A /B, ASTM A333-1.6/7.9, ASTM A335-P1/P11, API 5L ... B, 20 ·Item: ERW, SMLS carbon steel pipes·Material: ASTM A106B, ASTM A 53A ... /B, ASTM A333-1.6/7.9, ASTM A335-P1/P11, API 5L ... XXS, or customized.·Pipe Billets from TPCO ERW carbon steel pipes