Knowledge summary of seamless steel pipes for conveying fluids
Fujin Iron and Steel
2021-09-29
The fluid conveying pipe has a hollow section and no welds from beginning to end. The steel pipe has a hollow section and is used as a pipe for transporting oil, natural gas, gas, water and certain solid materials in large quantities. Compared with solid steel such as round steel, steel pipe is lighter when the bending and torsion strength is the same. It is a kind of economical cross-section steel, which is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, and bicycles. And steel scaffolding used in building construction. The use of steel pipes to manufacture ring-shaped parts can increase the utilization rate of materials, simplify the manufacturing process, and save materials and processing man-hours, such as rolling bearing rings, jack sleeves, etc., which have been widely used for manufacturing at present.
Manufacturing method of conveying fluid pipe:
①Generally, the temperature of boiler tubes is below 450℃. Domestic tubes are mainly made of No. 10 and No. 20 carbon steel hot-rolled tubes or cold-drawn tubes.
②High-pressure boiler tubes are often in high temperature and high pressure conditions when they are used. 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 durable strength, high oxidation and corrosion resistance, and good organizational stability.
(2) Purpose:
①General boiler tubes are mainly used to make water wall tubes, boiling water tubes, superheated steam tubes, superheated steam tubes for locomotive boilers, large and small smoke tubes and arched brick tubes.
②High-pressure boiler tubes are mainly used to manufacture superheater tubes, reheater tubes, air guide tubes, main steam tubes, etc. of high-pressure and ultra-high-pressure boilers.
However, round pipes also have certain limitations. For example, under the condition of plane bending, round pipes are not as strong as square and rectangular pipes. Some agricultural machinery frameworks, steel and wood furniture, etc. often use square and rectangular pipes. According to different purposes, special-shaped steel pipes with other cross-sectional shapes are required.
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How to store seamless steel pipes will be betterChoose a suitable place and warehouse: The place or warehouse for storing steel should be selected in a clean, clean, well-drained place, away from factories and mines that generate harmful gases or dust. Weeds and all sundries must be eradicated on the site, and the steel must be clean.VIEW MORE
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Steel pipe production processInternal heating, the temperature is about 1200°C. The fuel is hydrogen or acetylene. The temperature control in the furnace is a key issue. After the round tube is out of the furnace, it must be pierced through a pressure punching machine.VIEW MORE