Why Are Straight Seam Welded Pipes Widely Used

Release time：

2025-12-19

Straight seam welded pipes are widely used because they achieve a good balance among production cost, processing efficiency, specification diversity and performance reliability, and can meet the common needs of multiple basic industrial fields.

⚙️ Inherent advantages: economy and high efficiency

The core competitiveness of straight seam welded pipes is first reflected in their manufacturing process.

• Low production cost:

Its production process is relatively simple. By rolling and welding metal strips into shape, the investment in the production line is relatively small, and at the same time, the utilization rate of raw materials is relatively high. Compared with seamless steel pipes, its raw material utilization rate can be increased by 10% to 15%, which directly reduces the cost of raw materials.

• High production efficiency:

Especially when the high-frequency resistance welding (ERW) process is adopted, the production process has a high degree of automation and can achieve rapid continuous forming, which is very suitable for large-scale production. Compared with spiral welded pipes, when producing steel pipes of the same length, the weld seam of straight seam welded pipes is shorter, which also makes its production speed faster.

📐 Flexible adaptation: diverse specifications and reliable quality

Straight seam welded pipes can adapt to complex and diverse application scenarios, thanks to their performance in terms of specifications and quality.

• Diverse specifications and dimensions:

Straight seam welded pipes can be produced in various specifications from medium and small diameters to large diameters (with diameters up to over 1 meter) and different wall thicknesses by adjusting the width of the steel strip and the forming process. The fixed-length range of its pipes is wide, ranging from 9 meters, 12 meters to tens of meters. This can reduce the number of joints at the construction site and lower the construction cost.

• Stable and controllable quality:

Modern production technology can effectively ensure its quality. For instance, the heat-affected zone of high-frequency welding is small, which helps to ensure the performance of the weld seam. A strict quality control system (such as ISO9001 quality management system certification) and inspection methods like hydrostatic testing and non-destructive testing (ultrasonic or eddy current testing) ensure the reliability of the products. Depending on the application scenarios, straight seam welded pipes need to comply with the corresponding national standards (such as GB/T 3091, GB/T 13793) or international standards (such as API 5L).

🏗️ Widely applicable: key materials in multiple fields

The above-mentioned advantages make straight seam welded pipes one of the preferred pipe materials in many basic industries.

• In the field of architecture and structure:

It is used for supporting steel structures in buildings, scaffolding, and water supply pipelines.

• Fluid transportation field:

It is used for transporting fluids with relatively low pressure such as water, gas, air and oil. In the petrochemical industry, large-diameter straight seam welded pipes (which can be produced by submerged arc welding SAW process) are also used for conveying pipelines.

• Mechanical manufacturing and other fields:

Used in automotive manufacturing for components such as drive shafts and shock absorbers; It is also applied in the construction of mining, power, agricultural irrigation, large power plant circulating water systems and underground pipe galleries.

🔄 How to choose: A simple comparison with other pipe types

To better understand the positioning of straight seam welded pipes, a brief comparison can be made between them and spiral welded pipes and seamless steel pipes.

Pipe shape	Compared with the main characteristics of straight seam welded pipes	Typical application scenarios
Spiral welded pipe	Usually have higher strength. It can produce large-diameter pipes with relatively narrow billets. However, the production speed is relatively low.	Large-diameter and high-pressure-bearing requirements conveying pipelines, such as large-scale water conservancy projects and high-pressure oil and gas transportation.
Seamless steel pipe	It has higher overall strength and better pressure-bearing capacity,but the production cost is higher	High-pressure, high-temperature or extremely safety-demanding working conditions, such as boiler tubes and high-pressure oil and gas tubes

Seamless steel pipes have higher overall strength and better pressure-bearing capacity. But the production cost is higher. High-pressure, high-temperature or extremely safety-demanding working conditions, such as boiler tubes and high-pressure oil and gas tubes.

📈 Development prospects: Continuous evolution to meet new demands

The application prospects of straight seam welded pipes remain broad. Domestic infrastructure projects (such as urban underground utility tunnels and large-scale pipeline projects) and the "Belt and Road Initiative" continue to generate demand. Meanwhile, under the guidance of policies, the industry is moving towards high-end development, such as the research and development of straight seam welded pipes of higher steel grades for large storage tanks and Marine engineering. The application of new technologies such as induction heating welding and laser online detection also helps to further improve product quality and production efficiency.

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