API, ASTM, JIS, API 5CT, API 5L, API 5DP, ANSI A182-2001, JIS C8305-1999
Grade:
10#-45#, A53-A369, API J55-API P110, Mn-V alloy, MO, Q195-Q345, 10#, 20#, 45#, A106(B,C), API J55, API K55, API N80, API L80, API P110, 09Mn2V, 16Mo, Q235, Q345, Q195, Q215