High-pressure boiler pipe knowledge collection--51 steel pipe network to provide high-pressure boiler steel pipe: mainly used to manufacture high-pressure and higher pressure steam boiler pipe and other high-quality carbon structural steel, alloy structural steel and stainless steel seamless steel pipe, These boiler tubes are often operated at high temperatures and pressures, and the tubes are subject to oxidation and corrosion under the influence of high-temperature flue gas and water vapor. Therefore, the steel tubes are required to have high endurance strength, high oxidation resistance, and have good tissue stability. The steel grades are: high-quality carbon structural steel grades 20G, 20MnG, 25MnG; alloy structural steel grades 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG, 12CrMoVG, 12Cr3MoVSiTiB, etc.; rust-resistant heat-resistant steel commonly used 1Cr18Ni9, 1Cr18Ni11Nb In addition to ensuring chemical composition and mechanical properties, the high-pressure boiler tubes should be hydrostatically tested one by one, and flaring and flattening tests should be conducted. The steel pipe is delivered in a heat-treated state. In addition, there are certain requirements on the microstructure, grain size, and decarburization layer of the finished steel pipe.
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