20g seamless steel pipe is a hollow section, no seams around the long bar of steel. Steel hollow section, a large number of pipes used for transporting fluids, such as transportation of oil, gas, gas, water and some solid materials, pipes and so on. 20 # steel, there are 20g. In addition to their carbon content, like outside, 20g and some trace elements is more suitable properties for use as boiler pressure vessel. Also 20g also focus on assessing its physical properties. Such as bending, impact and tensile properties. 20G high-pressure boiler tubes are, but the steel used in the manufacture of steel, there are strict requirements. 20G high-pressure boiler tubes often in high temperature and high pressure conditions used in the role of high temperature gas pipe and water vapor, oxidation and corrosion will occur. Require durable steel with high strength, high corrosion resistance to oxidation and have good organizational stability. High-pressure boiler tube is mainly used to manufacture high and ultra-high pressure boiler superheater tubes, reheater tubes, airway, the main steam pipe.