... .Material:Q195, Q235A, Q235B, Q345, ASTM A53/106, ASTMA500, ST375.Standards:GB/T3091-2001, GB/T9711.1-1997, GBT8162, GBT8163, GBT3087 ... , and the steel pipes can be supplied according to GB, ASTM, API, DIN, JIS standards, the factory is locating in \Development Zone, Caihezhuang ... , a well-known Steel City in China. It is near to Tianjin port.If you have any questions, pls contact me ...