ERW steel pipe

There are various types of steel pipes for your choice in the current steel pipe market today. In the practical purchase, some people may be wondering about ERW steel pipe. First of all, in order to better know the ERW steel pipe, we would like to start at the beginning of its simple definition. ERW is short for electric resistance welding. Technically speaking, the electric resistance welded processing begins with a coiled steel plate with appropriate thickness and specific width to form a pipe that conforms to its required steel pipe sizes. And ERW pipe typically holds much tighter tolerances and maintains much more consistency of surface & wall than seamless carbon steel pipe. Common ERW specs include API5LB, A53, and A500. Furthermore, ERW pipe is a high speed production product in that it can be made into continuous lengths up to 115 feet. In addition, this type of pipe has the uniform wall thickness and outside dimension with a wide range of specifications.

Seamless pipe and welded pipe are two common type of hollow structural section in use. In the current steel market, besides the ordinary types of hollow sections, such as circular, square and rectangular hollow sections, some other shapes are also available for certain applications in life. Today, some steel pipe manufacturers are committed to customized shapes as per the specific requirements of clients in the world. For example, the elliptical hollow sections have become more popular for architectural designs. Of course, you can often find that some other shapes of hollow structural sections have been used in a variety of infrastructure construction around us. Today, China hollow section tubes offer advantages of corrosion protection in applications. Some hollow sections have rounded corners resulting in a better protection than that with sharp corners. This is especially true for the joints in circular hollow sections where there is a smooth transition from one section to another. Meanwhile, this better protection increases the protection period of coatings against corrosion.

In the recent years, ERW pipes are extensively used as structural steel pipes in many sectors, including agriculture, industry and construction activities such as scaffolding and casing in bore wells. They are also widely used for conveying water, gas, crude oil and etc. ERW pipes are typically used to make beams for structural framework, or for highway construction and bridges. Nevertheless, in a long run, this type of pipe will still confront a great challenge to meet very high standards of both national and international specifications in steel pipe market in future.