天津市北辰区中关村可信产业园B9-1 Address: B9-1, Trustworthy Industrial Park, Zhongguancun, Beichen District, Tianjin
15522233345 Mobile: 15522233345
许宗涛 Contact: Xu Zongtao
High pressure pipe 2
Boiler tube refers to steel that is open at both ends and has a hollow section. Its length is larger than that of the surrounding steel. According to the production method, it can be divided into seamless steel pipes and welded steel pipes. The external dimensions of the steel pipe (such as outer diameter or side length) and Wall thickness indicates a wide range of sizes, from a capillary with a small diameter to a large-diameter tube with a diameter of several meters. Steel pipes can be used in pipelines, thermal equipment, machinery industry, petroleum geological exploration, containers, chemical industry and special applications.
1. Basic knowledge
There are two types of steel pipes: seamless steel pipes and welded steel pipes (seamed pipes). According to the sectional shape, it can be divided into round pipes and special-shaped pipes. Round steel pipes are widely used, but there are some special-shaped steel pipes such as square, rectangular, semi-circular, hexagonal, equilateral triangle, and octagonal. For steel pipes subjected to fluid pressure, hydraulic tests are performed to check the pressure resistance and quality. It is qualified that no leakage, soaking or swelling occurs under the specified pressure. Some steel pipes also need to be crimped according to the standard or the demander's requirements. , Flare test, flattening test, etc.
① Generally, the temperature of boiler tubes is below 350 ° C. Domestic tubes are mainly made of hot-rolled or cold-drawn tubes of No. 10 and No. 20 carbon steel.
② High-pressure boiler tubes are often in high temperature and high pressure conditions when they are used.
Under use, oxidation and corrosion will occur. Steel pipes are required to have high durability, high resistance to oxidation and corrosion, and good structural stability.
①General boiler tubes are mainly used to manufacture water-cooled wall tubes, boiling water tubes, superheated steam tubes, superheated steam tubes for locomotive boilers, large and small smoke pipes, and arch brick pipes.
② High-pressure boiler tubes are mainly used to manufacture superheater tubes, reheater tubes, air ducts, and main steam tubes for high-pressure and ultra-high-pressure boilers. The supply and demand trend of the high-pressure boiler tube industry is generally stable, but the supply and demand situation of specific sub-sectors will further differentiate. Insiders pointed out that the most critical link is the use and promotion of new energy-saving and thermal insulation 20g high-pressure boiler tube equipment.
New energy-saving 20g high-pressure boiler tube products are gradually increasing in the market, such as green environmental protection coatings, energy-saving water-saving bathroom products, environmental protection stone, environmental protection cement foam insulation boards, etc. Energy-saving and environmental protection products are in the broad market of 20g high-pressure boiler tubes. China's prospects are promising.