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The difference between seamless square tube and straight seam square tube: where is the big difference between straight seam square tube and seamless square tube? Analysts believe that the accelerated recovery of economic growth is one of the important factors to promote the square tube plate. Previously, there was a strong short selling mood in the US market, but recently, with the release of better than expected economic data from the US, Europe and China, the market mood has improved. Elimination
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In order to prevent the square tube from showing the defect of hot cracking, we can take the following eight measures: (1) According to the pipe structure, size, length and width, thickness, etc., design a correct and reasonable gating system structure and setting position. In the process of condensation line shrinkage, ensure the temperature difference is balanced, and then solidify in order to make the square tube shrink normally and freely. (2) According to the mud core structure, the core bone structure shall be manufactured with corresponding rigidity
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Process of seamless rectangular pipe: ① main consumption process of hot rolled seamless rectangular pipe (main inspection process): preparation and inspection of pipe blank → heating of pipe blank → piercing → pipe rolling → reheating of raw pipe → sizing (reducing) → heat treatment → straightening of waste pipe → finishing → inspection (non-destructive, physical and chemical, bench inspection) → warehousing ② cold rolling (drawing) Main consumption process of seamless rectangular tube: blank preparation → pickling
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Commonly used square tube size: for example, the commonly used square tube size of seamless square tube with an outer diameter of 50mm, ⑴ It is generally calibrated in millimeters (mm) of the outer diameter D, inner diameter and wall thickness S of the square tube. ⑵ Each type of square tube has regular different sizes, with 29 types of 32-195mm outer diameter. Another example is the nominal diameter of welded square pipe 2
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And it shall be tied with the vertical pole to tighten the horizontal pole. Structural requirements for square pipes: when the erection height exceeds 40m and there is wind vortex effect, the structural requirements for square pipes shall conform to the following rules: 1. The longitudinal distance and step distance of degree poles of single and double row square pipes shall not be greater than 2.1m, and transverse diagonal braces shall be set. 2. The upper part of the top layer of the portal frame, the setting layer of the wall connecting parts, and the protective shed
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Introduction to rectangular tubes: There are two main consumption modes of rectangular tubes, namely, cold rolling and hot rolling. Rectangular tube hot rolling is made of hot rolled strip steel after processing. Cold drawn or cold rolled fine rectangular tubes. Cold rolled rectangular tubes are cold drawn or cold rolled fine rectangular tubes with high dimensional accuracy and good external brightness for mechanical structures and hydraulic equipment. Cold drawn rectangular tube is used as the starting material