How much do you know about the details of large-diameter spiral welded steel pipes

Large-diameter spiral welded steel pipe is a type of steel pipe that has been widely used in recent years. Its main features are large diameter, high strength, and suitable for long-distance transportation and high-pressure medium transportation.

First, spiral welding technology

Large-diameter spiral welded steel pipes adopt spiral welding technology, which is an efficient, continuous, and automated production of steel pipes. Its production is as follows: first roll the hot-rolled steel strip or cold-rolled steel strip into a tube shape, then pre-bend the edge of the steel strip, and then press the edge of the pre-bent steel strip to form a circular weld of the pipe. Next, the pipe is welded in multiple passes to become a complete spiral welded steel pipe.

The advantage of spiral welded steel pipe is that it has high production efficiency and short production cycle, and can quickly meet market demand. At the same time, it also improves the quality and performance of steel pipes, making the products characterized by high strength, high wear resistance, and high-pressure resistance. In addition, spiral welding technology can also be adapted to a variety of materials and can produce steel pipes of various specifications.

Second, material selection

For large-diameter spiral welded steel pipes, material selection is crucial. The main materials used are Q235B, Q345B, L245, L290, L360, X42-X80, etc. Among them, Q235B and Q345B are commonly used low alloy steels with good strength and plasticity and relatively low prices. L245, L290, L360, X42-X80, etc. are high-strength steels used in oil and gas transmission pipelines, and their wear resistance, corrosion resistance, and pressure resistance are very good.

In terms of material selection, the use environment and customer needs of the steel pipe also need to be considered to select the appropriate material. At the same time, production also requires quality control of materials to ensure that the quality and performance of steel pipes meet standards and customer requirements.

Third, product features

1. Large diameter: The diameter of large-diameter spiral welded steel pipes is generally above 219mm and can reach more than 3000mm. This kind of large-diameter steel pipe can meet the requirements of oil and gas, water conservancy, chemical industry, and other industries for large amounts of medium and long transportation distances.
2. High strength: The material used in large-diameter spiral welded steel pipes has high strength and can withstand large pressure and bending forces. Its strength and stiffness are also higher than other steel pipes and can be used in complex geological environments.
3. Wear resistance and corrosion resistance: The material of large diameter spiral welded steel pipe has been specially treated to have better wear resistance and corrosion resistance. This feature enables it to maintain a long service life when transporting oil, gas, and other media.