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What are the characteristics of using anti-corrosion spiral pipes for potable water pipelines?

2022/01/27

What are the characteristics of using anti-corrosion spiral pipes for potable water pipelines?

When tap water flows through steel pipes, it exerts significant impact on the pipeline. Conventional steel pipes are prone to damage under such pressure, whereas spiral-welded pipes, with their exceptional toughness, can withstand much higher pressures.

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How is rust removed from straight-seam pipes?

2022/01/12

How is rust removed from straight-seam pipes?

In the anti-corrosion construction of oil and gas pipelines, surface treatment of longitudinal‑seam pipes is one of the key factors determining the service life of the pipeline’s corrosion protection; it is also a prerequisite for ensuring strong adhesion between the protective coating and the pipe. According to research by specialized institutions, the service life of an anti-corrosion coating depends on such factors as coating type, coating quality, and the construction environment. Surface treatment of longitudinal‑seam pipes accounts for approximately 50% of the influence on the coating’s service life; therefore, surface‑treatment methods must be continuously refined in strict accordance with the requirements specified in the anti-corrosion coating standards.

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Composition and Manufacturing of Steel Plate Spiral Pipes

2021/12/28

Composition and Manufacturing of Steel Plate Spiral Pipes

How are steel plate rolled pipes manufactured, and what applications do they serve? Steel plate rolled pipes primarily consist of a roller, a roller shaft, a gear‑disc adapter (or large gear), a roller hub, a bearing housing, and bearings.

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How should the raw materials for steel plate spiral pipes be selected?

2021/12/16

How should the raw materials for steel plate spiral pipes be selected?

Producing steel‑plate coiled pipes requires certain raw materials. To ensure the quality of these products, we must pay close attention to every detail of the manufacturing process, starting with the fundamental raw materials. After all, raw materials form the foundation; only with high‑quality inputs can we guarantee consistent performance in subsequent stages. Moreover, selecting appropriate raw materials for steel‑plate coiled pipes does not mean that any material will suffice—choosing the right ones is essential. It is imperative not to cut corners on raw materials, as doing so can compromise production quality. Below are some key principles to consider when manufacturing steel‑plate coiled pipes, for your reference:

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Factors Affecting the Gap Size in Steel Plate Spiral Welded Pipes

2021/12/01

Factors Affecting the Gap Size in Steel Plate Spiral Welded Pipes

The quality of steel plate spiral-welded pipes is significantly influenced by weld‑seam dimensions, which are determined by a combination of factors, including welding process parameters, the shape and positioning of the welding wire, flux flow rate, flux performance, and the geometry of the welded seam.

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What is the bend test for steel plate rolled pipes used to assess?

2021/11/16

What is the bend test for steel plate rolled pipes used to assess?

The bend test for steel plate rolled pipes is primarily used to determine the bending strength of brittle and low‑ductility materials (such as cast iron, high‑carbon steel, and tool steel) and to assess deflection, which serves as an indicator of ductility. The bend test can also be employed to evaluate the surface quality of the material.

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What causes deformation in steel plate rolled pipes?

2021/11/08

What causes deformation in steel plate rolled pipes?

Steel plate spiral pipes are typically manufactured by straight-seam or helical-seam welding, with a fundamentally similar roll-forming process: shearing (or cutting) → beveling → flipping the steel plate → rounding the ends into arcs → forming large-diameter coils (including spot welding) → butt-jointing pipe sections (including spot welding) → welding the circular ends (using automatic welding).

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High-frequency welding of steel plate spiral pipes

2021/10/27

High-frequency welding of steel plate spiral pipes

The skin effect and proximity effect of alternating current are applied to high-frequency welding of steel plate‑rolled tubes. After roll forming, the steel strip is shaped into a circular tube blank with a fragmented cross‑section. One or a set of resistors (magnetic rods) rotates near the center of the induction coil inside the tube blank, establishing an electromagnetic induction circuit between the resistor and the open edge of the blank. Under the influence of the skin and proximity effects, intense localized heating occurs at the edges of the tube blank’s opening, rapidly raising the weld seam edges to the temperature required for welding.

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