What is ERW(Electric Resistance Welded) Steel Pipe?

Home > Blog > What is ERW(Electric Resistance Welded) Steel Pipe?

ERW pipe refers to a kind of high-frequency Electric Resistance Welding steel pipe. ERW pipe is divided into two forms of AC welding and DC welding, TUSPIPE’s high frequency welding is mainly used to produce thin-walled and normal wall thickness steel pipe, ERW pipe is an advanced performance, leading quality and cost-effective pipe for oil and gas storage and transportation, and it is ideal for most of the mechanical processing.

The erw material of erw pipe full form final product is between welded steel pipe and seamless material, and because of this, it is smoother and the surface texture is more consistent, so there are no obvious welds.

blog-768-576

The surface of the ERW steel pipe is uncoated, the color is semi-smooth dark gray, and the weld is located inside.

ERW pipe is generally used as wire casing in the power industry. Performance characteristics: 100% ultrasonic testing of the base material ensures the inherent quality of the pipe body; there is no unwinding-disc shearing process, base metal pitting , less scratches; there is basically no residual stress in the finished pipe after stress relief; the welding seam is short, and the probability of defects is small; moist sour natural gas can be transported conditionally; after diameter expansion, the geometric size accuracy of the steel pipe is high; welding It is carried out in a straight line in a horizontal position after the molding is completed. Therefore, the staggered edges, seams, and pipe diameter and circumference are well controlled, and the welding quality is excellent.

The main products are divided into three categories: two straight seam steel pipe production lines, product specifications 114.3mm-508mm, wall thickness 3.58mm-16.3mm. There are ten spiral pipe production lines, product specifications 219.1mm-3000mm, wall thickness 5mm-30mm. There are two production lines for petroleum special oil casing, product specifications 60.32mm-508mm, wall thickness 4.24mm-16.3mm. Equipped with two anti-corrosion and insulation production lines. The annual output of steel pipes reaches 500,000 tons. Products can implement standards: API 5L, API 5CT, ASTM, EN10219-2, GB/T9711, 3091-20081, 3793-2008, 14291-2006 and other latest international standards. Product steel grades include: GRB, X42, X52, X60, X65, X70, J55, K55, N80, L80, P110, etc. Products are widely used in oil, natural gas, gas, coal mines, machinery, electricity, piling and other purposes.