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  • What should be paid attention to when welding galvanized steel pipes

    What should be paid attention to when welding galvanized steel pipes

    The welding of galvanized steel pipe should pay attention to: 1. Galvanized steel pipes with a pipe diameter greater than 100mm should be connected by flanges or ferrule-type special pipe fittings. 2. For the weld between galvanized steel pipe and flange, to ensure the welding...
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  • Submerged arc steel pipe high-frequency welding process

    Submerged arc steel pipe high-frequency welding process

    Submerged arc steel pipe high-frequency welding process introduction: 1. The control of the weld gap: After rolling by multiple rollers, the strip steel is sent to the welded pipe unit. The strip steel is gradually rolled up to form a circular tube blank with an opening gap. A...
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  • Technical characteristics of double-sided submerged arc welding spiral steel pipe

    Technical characteristics of double-sided submerged arc welding spiral steel pipe

    1. During the forming process of double-sided submerged arc welding spiral steel pipe, the deformation of the steel plate is uniform, the residual stress is small, and the surface does not produce scratches. Processed steel pipes have greater flexibility in the range of diamet...
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  • How to prevent decarburization of steel pipes

    How to prevent decarburization of steel pipes

    Once decarburization occurs in the production process of the steel pipe, it will affect the subsequent process, and also reduce the high-quality performance and service life of the steel pipe itself, so manufacturers usually take appropriate measures to avoid or solve this pro...
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  • What are the standards for the storage of anti-corrosion steel pipes

    What are the standards for the storage of anti-corrosion steel pipes

    1. The appearance of the storage and delivery of anti-corrosion steel pipes needs to be checked as follows: ① Check each root to ensure that the surface of the polyethylene layer is flat and smooth, without dark bubbles, pits, wrinkles, and cracks as a whole, and the overall c...
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  • Forming method and connection type of large-diameter steel pipe

    Forming method and connection type of large-diameter steel pipe

    At present, the main production process of large-diameter steel pipes in my country is hot-rolled large-diameter steel pipes and thermally expanded-diameter steel pipes. The largest size of thermally expanded seamless steel pipes is 325 mm-1220 mm and the thickness is 120mm. T...
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  • How to perform daily maintenance on straight seam steel pipe

    How to perform daily maintenance on straight seam steel pipe

    Long-distance oil and gas pipelines are an important way of energy security. During the anticorrosion construction process of oil and gas pipelines, the surface treatment of straight seam steel pipes is the key factor determining the service life of pipeline anticorrosion. It ...
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  • What are the heat treatments of stainless steel welded pipes

    What are the heat treatments of stainless steel welded pipes

    During the production process of stainless steel welded pipe, intermediate heat treatment and finished heat treatment can be carried out. Because a bright surface without oxidation can be obtained, the traditional pickling process is canceled. The use of this heat treatment pr...
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  • Comparison of advantages and disadvantages of spiral steel pipe and straight seam steel pipe

    Comparison of advantages and disadvantages of spiral steel pipe and straight seam steel pipe

    The weld seam of the spiral steel pipe is longer than that of the straight seam steel pipe. If the pipe length is L, the weld seam length is L/cos(θ). However, most of the defects of steel pipes are concentrated in the weld seam and the heat-affected zone. The long weld seam m...
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