TIANJIN HUILITONG STEEL TUBE CO.,LTD.
NEWS CENTER
Mastering and understanding cutting-edge industry information
NEWS CENTER
Mastering and understanding cutting-edge industry information
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How much do you know about square tubes?
Square rectangular pipe is a name for square pipe and rectangular pipe, that is, steel pipe with equal and unequal side length. It is made of strip and rolled by process treatment. Generally, the strip is unpacked, flattened, curled, welded to form a round tube, and then rolled by the round tube
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Types of square tubes
Square tubes are divided according to the production process: hot-rolled seamless square tubes, cold-drawn seamless square tubes, extruded seamless square tubes, and welded square tubes. Among them, the welded square tube is divided into: (a) according to the process - arc welded square tube, resistance welded square tube (high frequency, low frequency), gas welded square tube, furnace welded square tube
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Features of double-sided submerged arc spiral steel pipe
In the process of forming, the steel plate is uniformly deformed, the residual stress is small, and the surface is not easy to produce scratches. 2. The processing of spiral steel pipes has greater flexibility in the diameter and the size range of wall thickness. 3. The advanced double-sided submerged arc welding process is adopted,
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What kinds of welding processes can straight seam welded pipes be divided into
Straight seam steel pipes can be divided into resistance welded straight seam steel pipes and submerged arc welded straight seam steel pipes in terms of welding process, among which resistance welded straight seam steel pipes are divided into high frequency welded straight seam steel pipes, intermediate frequency welded straight seam steel pipes, low frequency welded straight seam steel pipes, The submerged arc welded straight seam steel pipe is also called double-sided submerged arc welded stra
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Understand the production characteristics of straight seam welded pipe
Regarding the straight seam high-frequency welded steel pipe, high-frequency butt welding is used, including high-frequency contact welding and high-frequency induction welding, and the current frequency range is 350-450kHz.
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Introduction to common problems of anti-corrosion steel pipe coating materials
Common problems can be roughly divided into three types, they are uneven coating, preservative dropping, and preservative blistering. (1) Uneven coating. The fundamental manifestation of this kind of problem is that the preservative is unevenly distributed on the surface of the steel pipe, some parts are coated too thickly, and some parts are applied
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