Current label: Rectangular tube wholesale
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Introduction to rectangular tubes: 1. Consumption and manufacturing methods: ① The operating temperature of ordinary boiler tubes is below 450 ℃, and domestic tubes are mainly made of 10 # and 20 # carbon bonded steel hot-rolled tubes or cold drawn tubes. ② High pressure boiler tubes are often in high temperature and high pressure conditions when they are used. Under the action of high-temperature flue gas and water vapor, the tubes will be oxidized and corroded. The steel pipe is required to have high durability
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Concept and classification of rectangular tube: rectangular tube is a kind of light thin-walled steel tube with hollow square section, also known as steel cold-formed section. It is a shape steel with square section and overall dimension made of Q235 hot-rolled or cold-rolled strip or coil as the base material after cold bending and forming and then high-frequency welding. Hot rolled extra thick wall square tube is in the condition of wall thickness increase, and its corner size and edge straightness are up to
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Identification method of rectangular tube: 1. Fake and inferior rectangular tubes are easy to fold. Folding is a variety of broken lines formed by the appearance of rectangular tubes, and this defect often runs through the longitudinal direction of the whole product. The reason for folding is that the fake and inferior manufacturers pursue efficiency, and the reduction is too large to produce ears. The folding will occur during the next rolling. The folded products will crack after bending, and the strength of steel will drop greatly. 2. Pseudo
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Precautions for rectangular pipe: Q345 seamless rectangular pipe has a very high utilization rate, but the ordinary construction party conducts a visual inspection on pipes, pipe fittings, rubber rings, etc. before construction, and abandons the use of any problems found. 1. Clearing Q345 seamless rectangular pipe orifice: clean all sundries in the socket. 2. Clearing rubber ring and upper rubber ring: clean and wipe the adhesive on the rubber ring
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Manufacturing process requirements: ① The rectangular straight pipe must be discontinued on the special import assembly line to ensure the manufacturing accuracy and airtightness of the air pipe. ② The blanking of rectangular air duct fittings shall be completed automatically by using computer software on the imported special machine, and the automatic plasma cutting process shall be completed on the imported special plasma cutting machine for sheet metal. ③ The seam connection of rectangular air duct shall adopt
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Use of rectangular pipe: a large number of pipes are used to escort fluid, such as oil, natural gas, water, gas, steam, etc. In addition, when the bending and torsional strength are the same, the weight is light, so it is also widely used to manufacture mechanical parts and engineering structures. It is also used for consumption of various conventional weapons. Square pipes are commonly used in various building structures and engineering structures, such as house beams, bridges, transmission towers, hoisting and transportation