ASTM, JIS, bs, GB, DIN, API, ASTM A106-2006, ASTM A312-2001, ASTM A53-2007, JIS G3463-2006, JIS G3454-2007, JIS G3455-2005, JIS G3445-2006, BS 1387, BS EN10219, GB/T 17396-1998, DIN EN 10216-1-2004, API 5L
Grade:
Q195-Q345, 16mn, 10#-45#, API J55-API P110, Q235, Q345, 16mn, 20#, API J55, API K55