Electric Resistance Welded pipe, commonly known as ERW steel pipe, is a type of steel tubing that’s produced through the process of electric resistance welding. ERW steel pipes are manufactured by low-frequency or high-frequency resistance “resistance”. They are round pipes welded from steel plates with longitudinal welds. It is used to transport oil, natural gas, and other vapor-liquid objects, and can meet various requirements of high and low pressure. At present, it occupies a pivotal position in the field of transportation pipes in the world.
During ERW pipe welding, heat is generated when current flows through the contact surface of the welding area. It heats the two edges of the steel to the point where one edge can form a bond. At the same time, under the action of the combined pressure, the edges of the tube blank melt and squeeze together.
Usually, ERW pipe maximum OD is 24” (609mm), for larger dimensions, pipe will be manufactured in SAW.
What kind of pipes (standards) could be made in ERW processes？
There are a lot of pipes that could be manufactured by the ERW process. Below, we list the most common standards in pipelines.
Carbon steel ERW pipe standards
ASTM A53 Grade A and B (and Galvanized)
ASTM A252 pile pipe
ASTM A500 structural tubing
ASTM A134 and ASTM A135 pipe
EN 10219 S275, S355 pipe
Stainless steel ERW pipe/Pipe standards and specifications
ASTM A269 stainless pipe
ASTM A270 sanitary tubing
ASTM A312 Stainless pipe
ASTM A790 ferritic/austenitic/duplex stainless pipe
API ERW Line pipe
API 5L B to X70 PSL1 (PSL2 shall be in HFW process)
API 5CT J55/K55, N80 casing, and tubing
ERW steel pipe application and usage:
ERW pipes are known for their high strength and durability, making them suitable for a wide range of applications. ERW tubes are also utilised in the automotive industry for manufacturing components like exhaust systems and frames.
ERW steel pipe used for transporting gas and liquid objects, such as oil and gas, could meet the low and high-pressure requirements. In recent years, with the development of ERW technology, more and more ERW steel pipes are used in the oil and gas fields, the automobile industry, and so on.
Advantages of ERW pipe:
High efficiency, low cost, material saving, and easy automation.
One of the key advantages of ERW tubes is their cost-effectiveness. The electric resistance welding process allows for the production of large quantities of tubes at a relatively low cost. Additionally, ERW tubes have a smoother interior surface compared to other types of welded tubes.
This uniformity is achieved due to the precision and control of the electric resistance welding process. In addition to their mechanical strength, ERW tubes offer an excellent surface finish, enhancing their aesthetic appeal and making them a preferable option for visible architectural applications.
What’s The Difference Between ERW Steel & Seamless Steel?
You may be wondering, if ERW pipe and seamless pipes are both without an obvious seam, what’s the difference? Whereas seamless tubes are formed by rolling an entire piece of metal to create a seamless finish, electric resistance welded tubes are instead welded along the seam to create the finished piece of tubing.
- ERW is also more affordable to manufacture than seamless alternatives, without there being a significant deficit in quality.
- Both seamless and ERW options are similarly robust, reliable and long-lasting.
- ERW is more practical and can be cut to size at Rayoung to whatever dimensions you require.
Why Choose Rayoung For your ERW Pipe Needs?
You wish to purchase a stainless steel ERW pipe in bulk to fulfill a variety of engineering and industrial application needs.
So why not contact Rayoung pipeline?
We can provide you with a profitable deal. Professionals in the industry are engaged in providing the best possible service and product quality to their clients. There is a broad range of products available to meet all applications effectively. We manufacture stainless steel ERW pipe using high-quality raw materials sourced from reputed companies in the country. We adhere to ASTM and other international standards. Feel free to contact us for any kind of industry erw steel pipe or tube you need.
