API, ASTM, DIN, GB, JIS, API 5CT, API 5DP, ASTM A1020-2002, ASTM A182-2001, DIN 1630, DIN EN 10025, GB 13296-2007, GB 5130, GB 9948-2006, GB/T 14976-2002, JIS C8305-1999, JIS G3441, JIS G3446-2004
Grade:
10#-45#, A53-A369, API J55-API P110, Q195-Q345, ST35-ST52, STPG42, 10#, 20#, 45#, A106(B,C), API J55, API K55, API L80, API N80, API P110, Q215, Q235, ST37, ST52, STPG42