S31803, S32205, S32750, S31500 ASTM A790/A790M; ASME SA790/SA790M OD 17.15 168.28mm WT 1.65 2.11mm(Sch 5S) WT 1.65 3.4mm(Sch 10S) WT 2.31 7.11mm(Sch 40S) WT 3.2 10.97mm(Sch 80S) ASTM A789/A789M; ASME SA789/SA789M; GB/T 21833 OD 15.88 50.8mm WT 0.89 4.0mm ASTM A790/A790M; ASME SA790/SA790M ASTM A789/A789M; ASME SA789/SA789M; GB/T 21833
