... fingerprint resistant treatment, slight oiled or non-oiled, dry.Standard seamless steel pipeToleranceOD: +/-5%; Thickness: +/-5%; Length: +/-10%.StandardGB/ ... A53, DIN2440, EN39-2001.Main Material: (Carbon Steel & Low Alloy steel)1, ASTM A53, A106, A210, A252, A333 etc; ... transportation of fluids, for example steam tube, big smoke tube, small smoke tube, generating tube etc 3,Product show: (1 ...