Stainless steel products are widely used in many industries and applications due to their excellent performance and characteristics. Today, we will discuss seamless stainless steel pipe and ERW stainless steel pipe and the difference between these two products.
There are some differences between ERW stainless steel pipe and seamless stainless steel pipe. ERW pipe is short for resistance welding. Regardless of the pressure, it is used to transport liquids, such as fuel, gas, etc., and plays an important role in transportation pipelines around the world. At the same time, it is seamless steel pipe. Square and rectangular steel pipes, without joints and hollow sections, are used for transporting liquids and for manufacturing structural components and mechanical parts due to their outstanding high bending strength and torsion strength. All in all, the purpose of ERW pipe and seamless steel pipe is very different.
SS seamless pipe is made of round billet, and SS ERW pipe is made of hot rolled coil. Although the two raw materials are completely different, it should be noted that the quality of the final product-the pipe is completely dependent on two factors-the quality control during the manufacturing process and the initial conditions and quality of the raw materials. Both pipes are made of different stainless steel grades, but the most common is stainless steel 304 pipe
The round billet is heated and pushed onto the perforated rod until a hollow shape is obtained. Subsequently, their length and thickness are controlled by extrusion technology. In the case of producing ERW tubes, the manufacturing process is completely different. The coil is bent axially, and the converging edge is welded over the entire length by resistance welding.
The stainless steel seamless pipe is fully completed on its assembly line, with an outer diameter of up to 26 inches. On the other hand, even the most advanced steel company using ERW technology can only reach an outer diameter of 24 inches.
Since seamless tubes are extruded, they do not have any type of joints in the axial or radial direction. On the other hand, ERW tubes are made by bending coils along their central axis, so they are welded over the entire length.
Generally, seamless pipes are used for applications requiring high pressure, and ERW pipes are used for service in low and medium pressure areas.
In addition, considering the inherent safety characteristics of seamless pipes, they are widely used in oil and gas, refineries and other chemical industries that require a zero-leakage policy to ensure the safety of personnel and factories. Having said that, under strict quality control, well-manufactured ERW pipes can also be used for similar services instead of conventional services such as water transportation, scaffolding and fences.
As we all know, the internal finish of ERW tubes is always controlled by good quality control technology, so they are always better than seamless tubes.
To determine whether the pipe provided is a seamless pipe or an ERW, just read the template on the side of the pipe
If it is ASTM A53, S type means seamless. Type F is furnace welding, and type E is resistance welding. This is how. This is the easiest way to identify whether a pipe is seamless or ERW.
Tip: ASTM A53 B grade is more popular than other grades. These pipes can be bare pipes without any coating, or they can be hot-dipped or galvanized and manufactured by welding or seamless manufacturing processes. In the oil and gas sector, A53 grade pipelines are used for structural and non-critical applications.
If you have any comments or more information on this post, please share with us in the comments section below
Save my name, email, and website in this browser for the next time you comment.
When the comment is approved, notify me via email.