API, ASTM, bs, DIN, GB, JIS, API 5CT, API 5L, API 5DP, ASTM A213-2001, ASTM A234-2007, ASTM A358-2005, BS EN10296, BS EN 39, DIN 1629/3, DIN EN 10216-1-2004, DIN 28180-2007, GB 5310-1995, GB 3087-1999, JIS G3461-2005
Grade:
10#-45#, 10MoWVNb, A53-A369, API J55-API P110, Q195-Q345, ST35-ST52, STPA22-STPA26, 20#, 10MoWVNb, A53(A,B), A106(B,C), A334, API J55, API N80, API P110, Q235, Q345, Q195, Q215, ST52, St37-2, STPA24