Boiler seamless steel pipe refers to the steel with openings at both ends and a hollow section, and its length is relatively large compared with the surrounding area. According to the production method, it can be divided into seamless steel pipe and welded steel pipe. ) and wall thickness indicate a wide range of sizes, from very small diameter capillaries to large diameter tubes up to several meters in diameter. Steel pipes can be used in pipelines, thermal equipment, machinery industry, petroleum geological exploration, containers, chemical industry and special purposes.
Manufacturing method
① Generally, the temperature of boiler tubes is below 350℃, and domestic tubes are mainly made of No. 10 and No. 20 carbon 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.
(2) Purpose:
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 boiler tubes are mainly used to manufacture superheater tubes, reheater tubes, gas guide tubes, main steam tubes, etc. of high-pressure and ultra-high-pressure boilers.
type
Boiler seamless steel tubes are divided into general boiler tubes and high-pressure boiler tubes according to the high temperature performance they are subjected to. Regardless of general boiler tubes or high-pressure boiler tubes, they can be divided into various steel tubes according to their application requirements.
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