High pressure boiler seamless tube is a kind of boiler tube, which belongs to the category of seamless steel tube. The manufacturing method is the same as that of seamless pipes, but there are strict requirements on the steel grades used to manufacture steel pipes. Seamless pipes for high pressure boilers are often used in high temperature and high pressure parts, and the pipes will be oxidized and corroded under the use of high temperature flue gas and water vapor. The steel pipe is required to have high lasting strength, high oxidation corrosion resistance, and good organizational stability. According to the size of the seamless tube, the high-pressure boiler tube belongs to the small-diameter seamless tube.
Low and medium pressure boiler tubes and high pressure seamless tubes are used to manufacture low and high pressure boiler superheated steam tubes, boiling water tubes and seamless tubes for locomotive boilers of various structures.And high-quality carbon structural steel hot-rolled and cold-drawn (rolled) seamless steel pipes for superheated steam pipes, large smoke pipes, small smoke pipes and arch brick pipes. Structural seamless steel pipes are seamless steel pipes used for general structures and mechanical structures.
①Generally, the use temperature of boiler tubes is below 450℃, and they are mainly made of carbon-structured steel hot-rolled tubes or cold-drawn tubes.
② High-pressure boiler tubes are often used in high temperature and high pressure conditions, and the tubes will be oxidized and corroded under the action of high-temperature flue gas and water vapor. The steel pipe is required to have high lasting strength, high oxidation corrosion resistance, and good organizational stability.
①General boiler tubes are mainly used to manufacture water wall tubes, boiling water tubes, superheated steam tubes, superheated steam tubes for locomotive boilers, large and small smoke tubes and arch brick tubes, etc.
②High-pressure seamless pipes are mainly used to manufacture superheater pipes, reheater pipes, gas guide pipes, main steam pipes, etc. of high-pressure and ultra-high-pressure boilers.