2024-01-05 The steel plate is first pressed into a U shape and then into an O shape in the forming mold, and then internal and external submerged arc welding is performed. After welding, the diameter is usually expanded at the end of the entire length, which is called UOE welded pipe, and the diameter without
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2024-01-04 1. Acceptance principles for spiral steel pipesThe quality inspection and acceptance of spiral welded pipes shall be carried out by the supplier's technical quality supervision department. The supplier must ensure that the delivered spiral welded pipes comply with the requirements of the correspondi
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2024-01-03 Straight seam steel pipes are steel pipes with welds that are longitudinally parallel to the steel pipe. They are usually divided into metric electric welded steel pipes, electric welded thin-walled pipes, transformer cooling oil pipes, etc. The production process of straight seam welded pipe is sim
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2024-01-02 Technical requirements for straight seam welded steel pipes:The technical requirements and inspection of straight seam welded steel pipes are based on the GB3092 "Welded Steel Pipes for Low-Pressure Fluid Transport" standard. The nominal diameter of welded steel pipes is 6~150mm, the nominal wall th
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2023-12-29 The process of pickling seamless steelpipes involves immersion pickling, spray pickling, and acid paste rust removal. The dipping pickling method is commonly used, while the spraying method is suitable for mass production. Steel parts are pickled in a 10% to 20% (volume) sulfuric acid solution at a
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2023-12-29 First: welding processIn terms of the welding process, the welding methods of spiral steel pipes and straight seam steel pipes are the same, but straight seam steel pipes will inevitably have many T-shaped welds, so the probability of welding defects is also greatly increased, and the welding residu
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2023-12-28 The life evaluation of seamless tubes depends on many factors, such as the use environment, chemical properties, mechanical properties, surface treatment, etc. The following are some commonly used evaluation methods:1. Corrosion testCorrosion is one of the main factors that reduce the service life o
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2023-12-28 1. During the steel pipe forming process, the steel plate deforms evenly, with small residual stress and no scratches on the surface. The processed steel pipe has greater flexibility in the diameter and wall thickness of the steel pipe size range, especially in the production of high-grade thick-wal
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