Table of content
Introduction
ERW is electric resistance welding, a welding process. I believe that this expression is often seen in the industrial manufacturing industry. ERW is usually a process and name used to produce steel pipes. This article will explain ERW in detail, such as its production process, advantages and product uses.
How Does ERW Work?
The Process of ERW
The ERW production process mainly uses resistance to produce product heat. Its working principle is as follows:
1. Preparation: Put the required steel ring or plate strip into the machine.
2. Forming: The machine helps raw materials such as steel strips to form a certain shape and release current.
3. Welding: The heat generated by the resistance of steel melts the edge of the material. And fuse the two. And no additional material is required for filling welding.
4. Cooling: After production is completed, it is cooled by room temperature or cold water. Make the weld stronger.
This method is mostly used for welding of long straight seam process.
Benefits of ERW
ERW welding is a commonly used welding process, and its advantages are mainly as follows
1. Cost-effectiveness: ERW welding process is relatively efficient and more affordable than other welding methods.
2. Welding speed: ERW welding production speed is relatively fast, suitable for finger production products.
3. Strength and durability: ERW welds are stronger and can withstand higher pressure.
4. High welding accuracy: Automated ERW welding process, high welding accuracy. Automation can be achieved.
These advantages of ERW are suitable for some places where buildings or automotive parts are produced.
Applications of ERW
The steel pipes produced by ERW process are suitable for a relatively wide range.
Pipeline: Usually used for carbon steel pipes, mostly used for water, natural gas, oil and other pipelines.
Construction: Some commonly used building structures and scaffolding for construction, etc.
Automotive industry: car chassis or car exhaust pipes, etc.
Difference Between ERW and Seamless Pipes
ERW pipes are produced by welding steel plates or steel coils. Seamless pipes are formed by extrusion or drawing of a solid piece of steel.
The main difference between the two is:
| Feature | ERW Pipe | Seamless Pipe |
| Manufacturing | Welded seam | Solid metal extruded or drawn |
| Strength | Stronger at the seam | No seam, consistent strength |
| Applications | Suitable for low to medium | Suitable for high-pressure systems |
Types of ERW Pipes
ERW steel pipes can be divided into the following three types due to different materials:
Low Carbon Steel ERW Pipes: mostly used for low-pressure pipelines.
High Carbon Steel ERW Pipes: mostly used for high-pressure pipelines.
Stainless Steel ERW Pipes: mostly used in high-pressure pipeline systems such as corrosion resistance.
ERW vs. Other Welding Methods
| Welding Type | ERW | TIG Welding | MIG Welding |
| Heat Source | Electric resistance | Tungsten inert gas | Metal inert gas |
| Speed | Fast and efficient | Slow | Moderate |
| Cost | LOW | High | Moderate |
| Application | Mass production of pipes | Precision welding | Versatile,used for various applications |
The welding techniques used in pipeline production are different, and their main advantages and disadvantages are as follows:
Conclusion
ERW is a more efficient welding method, and the steel pipes produced are widely used. This welding process mainly uses electric current heating to fuse the steel to form a strong weld. ERW steel pipes are also widely used, mostly in pipelines, construction, automobiles, etc.
If you are learning about this welding method and steel pipes. I hope this article can help you
