Norme
GB 13296-2007, DIN EN 10025, A106-2006 ASTM, A213-2001 ASTM, A53-2007 ASTM, A1020-2002 ASTM, G3463-2006 JIS, BS EN10025, API, API 5L, API, ASTM, BS, GB
Grade
Q195-Q345, Q235, Q345, Q195, Q215
Standard2
API 5L, A182-2001 ANSI, BS EN10025, GB 13296-2007