API, ASTM, DIN, GB, JIS, API 5CT, API 5L, ASTM A106-2006, ASTM A213-2001, DIN 17175, GB 5310-1995, GB 3087-1999, GB 9948-2006, GB 6479-2000, GB/T8162, Gb/t8163, JIS G3454-2007, JIS G3445-2006, JIS G3444-2006, JIS G3446-2004
Grade:
10#-45#, API J55-API P110, Q195-Q345, 10#, 20#, 45#, API J55, Q235, Q345