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Seamless Steel Pipe: Annealing and Non-Annealing

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The main difference between   seamless steel pipe   annealing and non-annealing lies in their organizational structure, hardness, machinability, and corrosion resistance. Structural organization and performance transformation: After the seamless steel pipe undergoes annealing treatment, its organizational structure will change. For example, annealing can reduce the hardness of the steel pipe, increase plasticity, enhance machinability, and corrosion resistance. While the steel pipe that has not been annealed may have higher hardness and strength, but it is difficult to process and handle. Annealing types: The annealing of seamless steel pipe includes full annealing, spheroidizing annealing, stress-relief annealing, etc. Full annealing aims to reduce the hardness of seamless steel pipe and eliminate the non-uniform organization and internal stress in the steel. For spheroidizing annealing, the seamless steel pipe needs to be heated to 750 degrees, held for a period of time and ...
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Differences Between Submerged Arc Welded and High-Frequency Straight Seam Welded Steel Pipe

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The welding process of   submerged arc LSAW steel pipe   is to connect the welding wire and steel plate by filling the weld to achieve the welding of LSAW steel pipe, while high frequency LSAW steel pipe uses the skin effect of high frequency current to melt the edge of the weld of the steel plate quickly, so that the weld will be fused together under the pressure of the external force, and the welding will be achieved. In terms of moulding, double-sided submerged arc LSAW steel pipe adopts JCOE moulding, which is cold-formed by stamping the steel plate one by one through the press, while high-frequency LSAW steel pipe adopts the moulding process in which the FXH multi-rolls are gradually turned into round shapes. In addition, there are obvious differences between submerged arc LSA steel pipe and HF LSA steel pipe in terms of production range, materials used, industries used and appearance. The production range of submerged arc steel pipe is from 325mm to 1420mm in diameter, a...
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The Advantages of Q235B Low Carbon Spiral Steel Pipe in Construction

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Q235B low carbon spiral steel pipe   is a high-quality and efficient building material that boasts excellent strength and durability. Its unique spiral design not only enhances the pipe's strength but also improves its resistance to bending and torsion. This type of steel pipe is suitable for various building structures such as bridges, highways, tunnels, and high-rise buildings. Composition and Performance: The main components of Q235B low carbon spiral steel pipe are carbon and alloy elements. Its low carbon content ensures good welding performance and formability. Additionally, this steel pipe has excellent corrosion resistance, ensuring stability in harsh environments and providing long-lasting protection for buildings. Production Process and Quality: Q235B low carbon spiral steel pipe is manufactured using advanced production processes and equipment, guaranteeing excellent geometric dimensions and surface quality. Its precise manufacturing process gives it higher stability whe...
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