... Grade: Q235A, Q235B, Q345API 5L: GR A, GR B, X42,X46, X56, X60,X65,X70, X80ASTM A252 GR ... , GR 2, GR 3ASTM A53: GR A, GR B, GR C, GR DBS 4360: Grade 43, Grade 50EN ... oil; construction and piling Cangzhou Manier Import-Export Trading CO., LTD is a professional manufacturer & exporter of LSAW steel pipe ... GB, ASTM, API, DIN, JIS standards, the factory is located in Tianjin Jinghai Development Zone, a well- ...