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  • Differences between annealing and normalizing of seamless steel pipes

    Differences between annealing and normalizing of seamless steel pipes

    The main difference between annealing and normalizing: 1. The cooling rate of normalizing is slightly faster than that of annealing, and the degree of supercooling is larger 2. The structure obtained after normalizing is relatively fine, and the strength and hardness are higher than that of annea...
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  • Carbon steel tube material and use

    Carbon steel tube material and use

    Carbon steel tubes are made of steel castings or solid round steel through holes to make capillaries, and then made by hot rolling, cold rolling or cold drawing. Carbon steel tubes have an important position in China’s seamless steel tube industry. The key materials are mainly q235, 20#, 35...
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  • Seamless steel tube straightening process

    Seamless steel tube straightening process

    1. The seamless steel tube enters the roller table at the entrance of the leveler from the upstream roller table. 2. When the head of the seamless steel tube is sensed by the sensor element in the middle of the entrance roller table, the roller table will decelerate. 3. When the head of the seaml...
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  • Material analysis of 3PE anti-corrosion steel pipe

    Material analysis of 3PE anti-corrosion steel pipe

    3PE anti-corrosion steel pipe base material includes seamless steel pipe, spiral steel pipe and straight seam steel pipe. The three-layer polyethylene (3PE) anti-corrosion coating has been widely used in the oil pipeline industry due to its good corrosion resistance, water vapor permeability resi...
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  • Advantages of hot-dip galvanized seamless steel tube

    Advantages of hot-dip galvanized seamless steel tube

    Hot-dip galvanized seamless tube is to make the molten metal react with the iron matrix to produce an alloy layer, so that the matrix and the coating are combined. Hot-dip galvanizing is to pickle the steel pipe first. In order to remove the iron oxide on the surface of the steel pipe, after pick...
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  • Thermal expansion carbon steel pipe

    Thermal expansion carbon steel pipe

    What is heat-expanded steel pipe? Thermal expansion is a processing method of steel pipes, which is to process small-diameter steel pipes into large-diameter steel pipes. The mechanical properties of thermally expanded carbon steel pipe are slightly worse than that of hot rolled carbon steel pipe...
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  • Structural seamless pipe

    Structural seamless pipe

    Structural seamless pipe (GB/T8162-2008) is a kind of seamless steel pipe used for general structure and mechanical structure. The fluid seamless steel pipe standard applies to seamless steel pipes that transport fluids. In addition to carbon (C) elements and a certain amount of silicon (Si) (gen...
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  • How to avoid bubbles in welded carbon steel pipes?

    How to avoid bubbles in welded carbon steel pipes?

    It is common for welded carbon steel pipes to have air bubbles in the weld, especially large-diameter carbon seamless steel pipe weld pores not only affect the tightness of the pipeline weld and cause pipeline leakage, but also become the induction point of corrosion, which seriously reduces the ...
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  • 8 Precautions for seamless pipe forming

    8 Precautions for seamless pipe forming

    Forming and sizing of seamless pipes, some hole design and adjustment methods will directly affect the quality, so we should pay attention to the following eight points when handling the forming of seamless pipes:   1. Before there is no perforation, the hole shape of each rack should be adj...
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  • 10 ways to remove burrs from seamless steel tubes

    10 ways to remove burrs from seamless steel tubes

    Burs are ubiquitous in the metalworking process. No matter how advanced and sophisticated equipment you use, it will be born with the product. This is mainly due to the plastic deformation of the material and the generation of excessive iron filings at the edges of the processed material, especia...
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  • Carbon steel tube welding process

    Carbon steel tube welding process

    Welding problems are sometimes encountered during the installation of carbon steel tubes. So, how to weld tubes? What should we pay attention to when welding carbon steel tubes? 1. Gas welding Gas welding can be used for welding, which is to mix combustible gas and combustion-supporting gas toget...
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  • Iron oxide scale treatment on the surface of seamless tube

    Iron oxide scale treatment on the surface of seamless tube

    When the carbon steel tube is in use, the oxide film on the surface is not easy to fall off. Usually, oxide films are produced in a heating furnace. So, how to clean the oxide film on the surface of the carbon seamless steel tube? 1. Iron oxide scale cleaning machine treatment The scale cleaning ...
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