Difference between Seamless and ERW Stainless Steel Pipes

Difference between Seamless and ERW Stainless Steel Pipes
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Stainless steel products are widely used in numerous industries and applications, due to its excellent properties and features. Today, here in this piece of article we will be discussing seamless stainless steel pipes and ERW stainless steel pipe and the difference between both these types. We will discuss the difference later, but before that let us know about seamless and ERW SS pipes in detail.

Duplex Steel PipeSeamless and ERW are the types of pipe available in different forms, shapes, and sizes. They are the most demanding products used in numerous applications. Seamless pipes are usually made using solid round steel known as “billet” that is pushed and heated until it gets a hollow tube shape. There are several indigenous suppliers and manufacturer’s available Jaiman Metalalloys is one of them that manufacturer and supply seamless and ERW stainless steel pipes around the world. However, if we talk about the ERW stainless steel pipes they are manufactured using HR coils and using heated and pushed methods.

Now, let’s move on to the main topic of this article that is the difference between ERW and seamless stainless steel pipe.

Difference between ERW SS pipe and seamless SS pipe:

ERW or electric resistance welding pipe is manufactured using the rolling metal and then it is welded longitudinally across the length. Seamless stainless steel pipes are manufactured by extruding metal into its desired length that is why ERW pipes have welded joints in the cross-section, whereas seamless pipes do not have joints in the cross-section.

In the seamless stainless steel pipes, there is no joint or welding available and is manufactured using billet. These pipes have finished two dimensional as well as wall thickness specifications in size ranges from 1/8 inches to 26 inches OD. These seamless pipes are considered applicable for high-pressure applications.

ERW pipes or (electric resistance welded) pipes are usually welded longitudinally and are manufactured from the coil/ strip. The size of such pipes ranges up to 24” OD. These pipes are cold formed from the ribbon of steel that is pulled through the series of rollers and created into a tube that is fused through an electric charge. The pipes are often used for low to medium pressure applications. The common sizes of such stainless steel pipes are 2 3/8 inches OD to 24 inches OD and available in a variety of lengths up to 100 feet. The surface finishes of ERW pipe are available in coated and bare formats and processing is handled on site as per customer’s specifications.

How can I identify ERW and seamless stainless steel pipes?
To easily identify the pipe supplied is ERW or seamless, you simply have to read the stencil available at the side of the pipe. For example- if it is an ASTM A53 then type S is seamless, type F is a furnace that is welded and type E is electrical resist welded, thus it would be easy for you to identify whether the pipe supplied is ERW or seamless stainless steel pipe.

So, now we are pretty sure that you have understood the difference between ERW and seamless stainless steel pipes. If you are interested to buy these pipes, visit Jaiman metalalloys today!

By |2018-12-05T17:00:57+05:30December 5th, 2018|Pipes & Tubes|