... LENGTHToleranceOD: +/-5%; Thickness: +/-5%; Length: +/-10%.StandardRound pipe: GB/T3091, BS1387-1987, ASTM A53, DIN2440, EN39-2001 ... , Q215, Q235, Q295, Q345, ST37, ST52, Grade A, Grade B.End finishPlain/ beveled ends or threaded with sockets/coupling ... request. UsageScaffolding pipe, Structure pipe, Fence/Door pipe, Furniture, Lowpressure fluid pipe for water oil or gas, Boiler pipe, brige building ...