API, ASTM, bs, DIN, GB, JIS, API 5CT, API 5DP, API 5L, ANSI B36.10M-2004, ASME B36.10M-2004, ASME B36.19M-2004, ASTM A53-2007, BS 1139, BS 31, DIN EN 10025, DIN EN 10208-1-1998, DIN EN 10217-1-2005, GB 13296-2007, GB/T 13793-1992, JIS G3455-2005
Grade:
10#-45#, 10Cr9Mo1VNb, API J55-API P110, Q195-Q345, ST35-ST52, STPG42, 10#, 20#, 45#, 10Cr9Mo1VNb, API J55, API K55, API L80, API N80, API P110, Q195, Q215, Q235, ST35, ST37, STPG42