seamless carbon steel pipe such as ASTM A106 GR.B, ASTM A179, ASTM A192,DIN2391,DIN1629, DIN17175, API 5L , API 5CT etc, with outside diameter 1/4 "---6 ", wall thickness SCH20 SCH30 SCH 40 SCH80 SCH160, Maximum Length is extend to 24mm, Especially ASTM A179, we even exported more than 15000 tons one year