A type of seamless tube for high-pressure boilers. The manufacturing method is the same as the seamless pipe, but there are strict requirements on the steel type used for manufacturing the steel pipe. According to the use temperature, it is divided into two types: general boiler tube and high pressure boiler tube.
1) Generally, the temperature of boiler tubes is below 450 ° C. Domestic tubes are mainly made of hot-rolled or cold-drawn tubes of No. 10 and No. 20 carbon steel.
2) The high-pressure boiler seamless pipe is often under high temperature and pressure when used. The pipe will be oxidized and corroded under the action of high temperature flue gas and water vapor. It is required that the steel pipe has high durability, high resistance to oxidation and corrosion, and good structural stability.
3) General boiler tubes are mainly used for manufacturing water-cooled wall pipes, boiling water pipes, superheated steam pipes, superheated steam pipes for locomotive boilers, large and small smoke pipes, and arch brick pipes.
4) Seamless tubes for high pressure boilers are mainly used to manufacture super heater tubes, re-heater tubes, air ducts, and main steam tubes for high pressure and ultra high pressure boilers.