bs, JIS, GB, DIN, ASTM, API, BS EN10296, BS EN10025, JIS G3467-2006, GB/T 8163-1999, GB/T 8162-1999, GB 6479-2000, DIN 1629/3, DIN 2391, DIN 17175, ASTM A106-2006, ASTM A210-1996, ASTM A252-1998, ASTM A513-2007, API 5CT, API 5L, API 5CT, 5L; ASTM, BS, JIS, DIN