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  • 2023-03-24

    Spiral welded pipes and straight seam welded pipes have different technical characteristics and production processes. They have many differences and differences in production, have different functions and uses, and their values in use are also different.The first is the difference in the welding pro

  • 2023-03-21

    Spiral steel pipe and steel coil pipe are both welded steel pipes, and the production process of the two is very different. Spiral steel pipe is a spiral seam steel pipe made of strip steel coil as raw material, extruded at regular temperature, and welded by automatic double-wire double-sided submer

  • 2023-03-17

    Push-made steel elbow: the process of pushing steel elbow with machinery + mold inner tube + intermediate frequency heating method, but later it is probably difficult to control the inner and outer wall thickness, and it is rarely used in practice. Socket weld elbows: most are forged. Sockets are us

  • 2023-03-14

    The processing of the outer anti-corrosion layer of the steel pipe must strictly follow the design requirements and relevant national standards. Rust removal must reach Sa2.5 level, and the primer must be applied within 2 hours after the rust removal is completed. After the primer is dry, the anti-c

  • 2023-03-10

    Causes and preventive measures of single-sided undercut:In the production process of submerged arc welded steel pipes, especially in high-speed welding, the undercut has become the main defect in the production process of spiral submerged arc welded steel pipes. The defect of undercut mainly has the

  • 2023-03-07

    Large-diameter steel pipes are also called large-diameter galvanized steel pipes, which refer to welded steel pipes with hot-dip or electro-galvanized layers on the surface of large-diameter steel pipes. Galvanizing can increase the corrosion resistance of steel pipes and prolong their service life.

  • 2023-03-03

    1. Mainly use wire brushes and other tools to polish the steel surface. The cleaning and preheating of spiral welded steel pipes can remove loose or raised scales, rust, welding slag, etc. Hand tool de-rusting can reach the Sa2 level, and power tool de-rusting can reach the Sa3 level. If the iron ox

  • 2023-02-28

    A detailed explanation of the welding process of large diameter straight seam steel pipe:Double-wire automatic welding of straight seam steel pipe is a welding technology developed in recent years. In addition to the characteristics of semi-automatic single-wire welding, it also has welding characte

  • 2023-02-24

    1. Rolling method: Stainless steel pipe bending generally does not require a mandrel, and is suitable for the inner round edge of thick-walled stainless steel pipes.2. Roller method: place a mandrel in the stainless steel tube, and push the outside with a roller at the same time.3. Stamping method:

  • 2023-02-21

    There are two main differences between oil casing and oil drill pipe: 1. Different uses; 2. Different materials.Oil casing is a steel pipe used to support the walls of oil and gas wells to ensure the normal operation of the entire oil well after the drilling process and completion. Each well uses se

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