Features :
GB/T8162, GB/T8163, ASTM A53, ASTM A106, DIN1629, API 5L
GB/T8162, GB/T8163:10#, 20#, 35#, 45#, 16MN(Q345B)
ASTM A53 GR. A, GR. B, GR. C
ASTM A106 GR. A, GR. B, GR. C
DIN 162 St 37.0, St 44.0, St 52.0
API 5L A B X42,X46, X52, X60, X65, X70, X80