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  • 2023-07-17

    Design of double-wire submerged arc welding process for S355NL straight seam welded pipe used in offshore wind turbine foundation
    S355NL fine-grained structural steel has been widely used in offshore wind power, oil platforms, welded steel pipes, etc. due to its excellent performance.In order to further improve the production efficiency of welded steel pipes and obtain steel pipe welded joints with excellent performance for th
  • 2023-05-26

    Tube Mill Fault Analysis——Weld Cracking Phenomenon
    The appearance of gaps refers to the phenomenon that the welds are not bonded together. The length of the gaps is generally more than a few centimeters or even longer. The main reasons are as follows:(1) Pass wearAs the extrusion roll hole pattern wears, the hole pattern (R) size gradually becomes l
  • 2023-05-11

    Tube Mill Fault Analysis——Analysis of Problems Caused by Sand Hole Tube
    Sand-hole pipes are also a kind of quality accident caused by weld leakage, but their gaps are very small, some of them cannot be directly observed by human eyes, and must be found through testing equipment, so we call this kind of pipes sand-hole pipes. The main reasons for sand hole pipes are as f

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