We are a professional manufacturer of spiral weled steel pipes, we can supply u ... .Steel Grade: Q235A, Q235B, Q345API 5L: GR A, GR B, X42,X46, X56, X60,X65,X70, X80ASTM A252 GR 1 ... , 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, SSAW ( ...