Introduction to Steel Plate Coiled Pipes

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2023-01-03

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Steel plate‑rolled pipes are manufactured by rolling and welding steel plates. They are typically large‑diameter pipes, as opposed to seamless steel pipes, which are produced through a rolling process. The advantages of steel plate‑rolled pipes include uniform wall thickness and large pipe diameters. Their drawbacks are stress concentrations at the welds, as well as temperature and pressure limitations when handling high‑temperature, high‑pressure media. In practice, this product offers numerous benefits, such as low cost, rapid production, flexible specifications and sizes, customizable lengths to meet user requirements, and small minimum order quantities.

　　 Steel plate rolled pipe It is fabricated by rolling and welding steel plates. Typically used for large-diameter pipes, it contrasts with seamless steel pipes, which are produced through a seamless manufacturing process. The advantages of rolled‑plate pipe include uniform wall thickness and larger nominal diameters. Its drawbacks are stress concentrations at the welds, as well as temperature and pressure limitations when handling high‑temperature, high‑pressure media. In practice, this product offers numerous benefits, such as low cost, rapid production, flexible specifications and sizes, customizable lengths to meet customer requirements, and small minimum order quantities. The product’s diameter ranges from 219 to 3,000 mm, with wall thicknesses from 6 to 300 mm. It finds extensive application in industries including shipbuilding, metallurgy, mining, papermaking, automotive manufacturing, and hydraulic cylinder fabrication. As a manufacturer, we also operate a state-of-the-art research center equipped with comprehensive testing capabilities—covering mechanical properties, process performance, eddy current, ultrasonic, hydrostatic pressure, metallographic analysis, and high‑precision carbon–sulfur analysis—supported by a team of highly qualified engineers and inspectors.

　　Steel plate spiral pipes are cold‑rolled from ordinary carbon steel, low‑alloy tool steel, or alloy tool steel, offering high production capacity and primarily serving as pipelines for fluid transport or structural components. These pipes also feature hollow cross‑sections and are widely used for conveying fluids such as crude oil, natural gas, liquefied petroleum gas, water, and certain solid materials. Their advantages include uniform coating, strong adhesion of the steel pipe surface, and a long service life. In hot‑dip galvanized steel pipes, complex physicochemical reactions occur between the steel substrate and the galvanizing bath, forming a dense, corrosion‑resistant zinc‑iron alloy layer that integrates seamlessly with both the pure zinc coating and the steel base. Consequently, these steel plate spiral pipes exhibit excellent corrosion resistance. A quality product must meet the design specifications in terms of material composition, and steel plates should be cut efficiently to minimize material waste. When using oxy‑acetylene cutting, the cut edges must be thoroughly cleaned. During beveling of steel plates, an angle grinder should be employed for grinding.

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Key Points for Using Steel Plate Coiled Pipes

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