Is Erw Pipe Different from a Normal Pipe?

Hunan Standard Steel
2 min readSep 20, 2023

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Many manufacturers conceive that normal and Erw pipes are the same. But they are completely different in terms of working, manufacturing, and their features.

Whether you are an owner or a hardcore steel operator, you should understand that both are comprehensively in distinction. If you are ready to know why, we discuss essential pointers to clear your concepts.

Manufacturing Process

ERW Pipe

ERW stands for electric resistance welded pipes that are designed by welding seams along the whole length of a pipe using electrical resistance.

Its making process is very convenient if you try to know a basic concept. A flat strip or coil of steel is passed via a series of rollers to form it into a cylindrical shape while conveying electric current over the edges of the strip and heating it to treat it mechanically or chemically to remove its imperfections.

Remind that its welds are visible on both the inside and outside of the pipe.

Seamless Pipe

As the name suggests, the seamless pipe is without any welding or seams over the surface of a pipe.

Manufacturers can form it by piercing a solid billet or round bar to create a hollow tube. The main unique feature of the seamless pipe is that it does not have any welds, resulting in minimal potential weak points. This quality makes it suitable for high-pressure and high-temperature resistance.

Strength and Durability

ERW Pipe

ERW pipes are very strong and adaptable for a wide range of commercial applications. The reason behind this consideration of consisting high pressure and high-temperature environment.

All in all, it is less robust compared to seamless pipe because of the presence of many seams or welds.

Seamless Pipe

Seamless pipes are stronger and more durable in their construction as they do not carry any type of seams or welds. They provide a uniform structure without welds or seams.

Therefore, it is no second thought, why the seamless pipe is beneficial for critical applications in industries such as oil and gas, petrochemicals, aerospace, and many others where integrity is the main point of view.

Availability and Cost

ERW Pipe

ERW pipes are more cost-effective and readily available than their counterparts. In this way, it is deployed in a wide range of applications, consisting of construction, plumbing, and structural engineering.

Seamless Pipes

Seamless pipes are more costly and expensive than ERW pipes due to the complexities of the manufacturing process. They are used in highly specialized applications where users need of high level of integrity and reliability.

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