ERW Steel Pipe, ERW Pipe, Electric Resistance Welded Pipe, steel pipe piles, piling pipe

ERW Steel Pipe

ERW steel pipe is made from steel coil and the weld seam runs parallel to the pipe. The width of the coil is the same as the circumference of the pipe so diameters are limited to 24 inches. However, because the manufacturing process is fast, it is ideal for large production runs of small (<= 24 in.) diameter sections.ERW steel pipe is manufactured by low-frequency or high-frequency resistance welding technology, which is welded from steel plates to form a circular pipe with a longitudinal weld. This type of steel pipe is widely used in the transportation of gases and liquids such as oil and natural gas, and can meet different high-pressure and low-pressure requirements.

Production Process of ERW Steel Pipe

The production process of ERW steel pipe is as follows:

First, the steel strip is unrolled, flattened and formed into a round tube blank. Then, the edge of the tube blank is heated to the melting temperature and pressure is applied through high-frequency resistance welding (ERW) to weld it into shape. After welding, the internal and external burrs are removed, especially the internal burrs, which can be controlled between -0.2mm and 0.5mm through the improved tool system.

In order to solve the difference in mechanical properties between the weld area and the parent material, the weld area of the steel pipe is heated to 927℃ by medium-frequency induction, and then air-cooled or water-cooled to homogenize its structure and improve the physical properties of the weld. Finally, after cooling, inspection and cutting, the ERW steel pipe is completed and ready to leave the factory.

Production process of ERW steel pipe

Application of ERW Steel Pipe

ERW (electric resistance welded) steel pipes are widely used in multiple industries and fields. Here are some of the main application scenarios:

Oil and Gas Industry:

Pipes used to transport crude oil, natural gas and refined products. ERW steel pipes are very common in oil and gas pipelines because they have high strength and corrosion resistance and can withstand the pressure generated during transportation.

Load-bearing piles

Pipe piles are used to transfer building loads to deeper solid soil layers. They can be driven into open or closed ends, with diameters ranging from a few inches to several feet, and can be spliced into lengths of hundreds of feet.

Mining

In the mining industry, steel pipes are often used to build ventilation shafts to support mining activities deep underground. Due to the rich selection of pipe diameters and thicknesses, they have become the preferred material for ventilation shaft construction. They can be supplied in sections and conveniently spliced, and support rings can help maintain the thickness of the pipe.

Agriculture and Irrigation:

In agriculture, ERW steel pipes are used in the manufacture of irrigation systems, greenhouse structures, and agricultural machinery. They are widely used in agricultural infrastructure due to their durability and ease of installation.

Pipeline Engineering:

ERW steel pipes are commonly used in urban natural gas pipelines, heating pipelines, and other public facilities pipeline projects. They have good sealing and high strength, which can effectively prevent leakage.

Mechanical Manufacturing:

ERW steel pipes are widely used in the manufacture of mechanical equipment parts, such as drive shafts, pipeline structures, etc. Their high precision and high strength ensure the stability and durability of mechanical equipment.

Automotive Industry:

ERW steel pipes are widely used in the automotive manufacturing industry, especially in automotive chassis, exhaust systems, and frame structures. Due to their lightness and good strength, ERW steel pipes help automakers reduce vehicle weight while ensuring safety.

ERW Steel Pipe