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Spiral Steel Pipe Manufacturer: Some Basic Facts About Longitudinal Seam Steel Pipes

2022/07/14

Spiral Steel Pipe Manufacturer: Some Basic Facts About Longitudinal Seam Steel Pipes

Spiral steel pipe manufacturers believe that the corrosion resistance of thick-walled straight-seam steel pipes and the extension of their service life have long been key concerns for pipeline designers and builders. Over nearly six decades of development, pipeline anti-corrosion technologies worldwide have largely reached maturity and stability. Steel pipes with an outer diameter-to-wall-thickness ratio of less than 20 are classified as thick-walled straight-seam steel pipes. They are primarily used as drill pipes for petroleum and geological exploration, cracking tubes in the petrochemical industry, boiler tubes, bearing tubes, and high-precision structural tubes for automobiles, tractors, and aerospace applications.

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Spiral Steel Pipe Manufacturer: Some Basic Facts About Longitudinal Seam Steel Pipes

2022/07/05

Spiral Steel Pipe Manufacturer: Some Basic Facts About Longitudinal Seam Steel Pipes

Spiral steel pipe manufacturers believe that straight-seam steel pipes are widely used in industries such as petroleum, metallurgy, construction, coal mining, port operations, and machinery. The installation and use of straight-seam steel pipes are subject to stringent technical requirements; operations should be carried out in coordination with actual conditions to ensure quality. During normal use, the following points should be observed:

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Some key points about spiral welded steel pipes

2022/06/24

Some key points about spiral welded steel pipes

Spiral welded steel pipe is manufactured by using rolled strip steel as the raw material, forming it through cold extrusion, and welding it with an automated double-wire, double-sided submerged-arc welding process. In the production of spiral welded steel pipe, the strip steel is fed into the pipe‑welding unit. After being rolled by multiple rollers, the strip gradually coils to form a circular tube blank with an open seam. By adjusting the downward pressure of the extrusion rolls, the weld gap is maintained within 1–3 mm, and the ends of the joint are kept flush.

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Do you know what the production process of spiral welded steel pipe is?

2022/06/14

Do you know what the production process of spiral welded steel pipe is?

Spiral welded steel pipe is manufactured by using coiled strip steel as the raw material, forming it under ambient temperature through extrusion, and welding it with an automated double-wire, double-sided submerged-arc welding process. In the production of spiral welded steel pipe, the strip steel is fed into the pipe‑welding unit, where it undergoes multi‑roll rolling, gradually curling to form a circular tube blank with an open seam. By adjusting the downward pressure of the extrusion rolls, the weld gap is maintained within 1–3 mm, ensuring that both ends of the joint are flush.

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How do spiral pipe manufacturers inspect pipe quality?

2022/06/08

How do spiral pipe manufacturers inspect pipe quality?

The spiral tube manufacturer states that product inspection begins with surface‑level assessment, namely visual quality inspection. Visual examination of welded joints is a simple yet systematic and widely applied method, serving as a critical component of final‑product inspection, primarily aimed at identifying surface defects and dimensional deviations. Typically, manufacturers conduct such inspections by naked eye, supplemented by standard reference templates, gauges, and magnifying tools. If numerous surface defects are detected, there is a corresponding likelihood of internal defects within the weld.

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Surface Treatment Requirements for Spiral Pipes from Manufacturers

2022/06/02

Surface Treatment Requirements for Spiral Pipes from Manufacturers

Spiral pipe manufacturers state that spiral pipes are primarily used in municipal water supply projects, the petrochemical and chemical industries, the power industry, agricultural irrigation, and urban construction, and are among the 20 key product categories prioritized for national development. Structural steel pipes are mainly manufactured from coiled strip steel as raw material; they are formed through room‑temperature extrusion and joined by an automated double‑wire, double‑sided submerged‑arc welding process. In the production of spiral‑shaped steel pipes, the strip steel is fed into a pipe‑welding line, where it passes through multiple sets of rollers that progressively roll and curl it into a circular tube blank with an open seam. By adjusting the downward pressure of the extrusion rollers, the gap between weld‑metal layers is maintained within 1–3 mm, ensuring that both ends of the weld are flush.

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Spiral Pipe Manufacturer: Factory Inspection and Stacking Requirements for Spiral Pipes

2022/05/27

Spiral Pipe Manufacturer: Factory Inspection and Stacking Requirements for Spiral Pipes

A simple and widely used inspection method is visual examination of spiral‑welded pipe products, which constitutes an important part of final‑product inspection. It is primarily employed to detect surface defects in welds, dimensional deviations, and the joints between raw‑material sections. Typically, this inspection is performed by naked eye, with the aid of standard samples, gauges, and magnifying lenses. If surface defects are present in the weld, internal defects are likely to exist as well; moreover, the distance from the pipe end to the joint of the raw material must not exceed 1,100 mm.

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A Brief Discussion on the Market Prospects of Spiral Welded Steel Pipes

2022/05/16

A Brief Discussion on the Market Prospects of Spiral Welded Steel Pipes

Looking at domestic spiral steel pipe production capacity, output has remained at a high level since January this year. According to data from the National Bureau of Statistics, in the first quarter, national spiral steel pipe production totaled 127.44 million tons, up 1.4% year on year, while crude steel production reached 144.73 million tons, an increase of 2.8%. Since April, despite repeated declines in domestic spiral steel pipe output, major manufacturers have announced production cuts or maintenance shutdowns; nevertheless, overall production continues to rise compared with last year. The National Bureau of Statistics reports that in April, spiral steel pipe output stood at 52.915 million tons, up 2.6% year on year. These statistics indicate that spiral pipe producers are implementing production reductions and output restrictions.

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