JIS, DIN, ASTM, bs, API, GB, JIS G3454-2007, DIN 1626, DIN EN
10305, DIN EN 10025, ASTM A106-2006, ASTM A513-2007, ASTM
A335M-2006, BS EN10025, API 5CT, API 5L, API 5DP, GB/T8162,
Gb/t8163, GB/T3639, GB/T5310
Grade:
A53-A369, API J55-API P110, 10#-45#, 16mn, Cr-Mo alloy, ST35-ST52,
A53(A,B), A335 P5, API J55, API K55, API N80, API L80, API P110,
10#, 20#, 45#, 16mn, 15crmo, ST37, ST52, ST35.4