Standard: API 5L ASTM A53 ASTM A106 ASTM A333 DIN 2448 DIN 2440 DIN 2440 DIN17175 DIN1629 DIN1626 EN 10204 EN 10216 EN10219 EN10217 BS1387 BS3061 Material: GR.B X42-X60 ST37-ST52 P235GH P265GH S235JR2H S275JRJ2H Note: Payment Term: 30% advance payment70% balance payment before shipment OR 100% irrevocable L/C. Deliver Time: We will produce all pipes quickly as we could when we get your payment, Should you have any question please do not hesitate to contact me. Looking forward to your corporation. Lisa Zhang Pho: 86-15203174679 Fax: 86-317-6090270