Standard: Api, astm, bs, gb, jis, api 5l, astm a106-2006, astm a252-1998, astm a53-2007, astm a660-1996, astm a671-2006, astm a672-2006, bs en10025, bs en10217, bs en10219, gb/t3901, gb/t9711, jis g3444-2006, jis g3445-2006 Grade: 16mn, a53-a369, q195-q345, st35-st52, 16mn, a53(a, b), q235, q345, st52 Thickness: 3.2 - 30 mm Section shape: Round Outer diameter: 168.3 - 3048 mm Place of origin: Tianjin, china (mainland) Secondary or not: Non-secondary Application: Oil pipe Technique: Saw Certification: Api Surface treatment: Other Special pipe: Api pipe Alloy or not: Non-alloy