... Quality: ISO900:2000, API5L, API5CL Product square steel pipesStandardGB/T3091-2001,BS1387,ASTM A53, ASTM A106, ... , in loose or seaworthy packing , wrapped with steel strip or at sellers optionUsageConstruction, bridge, highway, machinery ... your deposits RemarkWe have professional testing equipment such as ultrasonic testing machine, eddy current testing machine,Mechanics testing machine to make sure ...