Features:(1) ASTM A 106, ASTM A 53, ASTM A179, API 5L Gr.B, X42, X46, X522)(2)Standard:DIN2448/1629Specificaiton:ST37,ST44,ST52-3,S235JR ,E355)(3)Size: OD: 1/4" to 30"(4)Thickness: SCH 5, SCH 10, SCH 20, SCH 40, SCH 80, SCH 160, SCH XXS5)(5)Other specifications available according to customers' requirements(6) Packing:International..