Hunan Steel Industrial Zone, No.9 Xiangfu Road, Yuhua District, Changsha, China
Boiler tube is working in high temperature and high pressure, the pipe smoke and water at high temperature steam oxidation and corrosion effects will occur, so it requiring durable steel with high strength, high oxidation resistance, and good organizational stability, high pressure boiler tube in addition to chemical composition and mechanical properties, hydrostatic testing done by the root, to be flaring, flattening test. Steel is heat treatment to delivery. In addition, there are certain requirements decarburization for the finished steel microstructure and grain size.
High-pressure boiler tubes are belongs to seamless steel pipe categories. Seamless have same manufacturing method, but there are strict requirements which used in the manufacture of steel pipe. Often in high-pressure boiler tube at high temperature and pressure conditions of use, the pipe under the effect of high temperature gas and water vapor, oxidation and corrosion will occur. Require durable steel with high strength, high resistance to oxidation corrosion, and have good organizational stability.
High-pressure boiler tubes are mainly used to manufacture high-pressure and high pressure boiler superheater tubes, reheater tubes, windpipe, and the main steam pipe. High-pressure boiler tubes for low and medium pressure boiler (working pressure is generally not more than 5.88Mpa, working temperature below 450 ℃) of heating surface tubes; used for high-pressure boilers (above 9.8Mpa working pressure in general, the working temperature of 450 ℃ ~ 650 ℃ between) the heating surface tubes, economizer, superheater, reheater, petrochemical industrial tube.