... : Chromate, fingerprint resistant treatment, slight oiled or non-oiled, dry.Standard seamless steel pipeToleranceOD: +/-5%; Thickness: +/-5%; Length: +/-10%.StandardGB/T3091, ... A53, DIN2440, EN39-2001.Main Material: (Carbon Steel & Low Alloy steel)1, ASTM A53, A106, A210, A252, A333 etc; 2 ... big equipments, for example transport of water, oil, gas etc•Can be used in low and medium pressure boiler ...