Standard
API, API 5L, ASTM A106-2006, ASTM A53-2007, ASTM A333-2005, JIS G3463-2006, BS 1387, GB/T 8162-1999, DIN 1629/4, DIN 17175
Grade
A53-A369, A53(A,B), A106(B,C), A179-C, A192, A214, 10#-45#, 10#, 20#, 45#, ST35-ST52, ST37, ST42, ST35.8, St42-2, St45-8