... LENGTHToleranceOD: +/-5%; Thickness: +/-5%; Length: +/-10%.StandardRound pipe: GB/T3091, BS1387-1987, ASTM A53, DIN2440, EN39-2001 ... customer request. UsageScaffolding pipe, Structure pipe, Fence/Door pipe, Furniture, Lowpressure fluid pipe for water oil or gas, Boiler pipe, brige building ... Others1:Special design available according to requirement.2:Pipe can be painting.3:All production process are ...