Chinese standard GB5310 is specified for high quality carbon structural steel, alloy structural steel and stainless heat resisting steel seamless steel pipe used in steam boiler pipelines with high pressure and above.GB5310 steel tube materials mainly include high quality carbon steel ( 20G), alloy steel (12CrMoG, 15CrMoG), heat resistant steel (12Cr2MoG, 15Cr5MoG, 12Cr1MoVG, 10CrMo910 and so on).20G is the most commonly used carbon steel material in GB5310.

OD:16-824mm

WT: 2-65mm

Length: 6-12m

Heat treatment: Normalizing 880-940℃

The 20G seamless steel tube is mainly used for general boiler purposes and can also be used for furnace tubes, heat exchanger tubes and seamless tubes for pipelines in petroleum refineries. As a professional boiler steel pipe supplier and manufacturer, except the chemical composition and various mechanical properties ,the 20G steel pipe we supply can also guaranteed the water pressure, flattening, flaming tests as well as the surface quality and non-destructive inspection.