What is the Difference between ERW and CDW Pipes?

Electric resistance welded pipes (ERW steel pipe) are longitudinally welded from metal after moving it afterward. CDW pipes are produced by expelling the metal to the required length; Hence ERW pipes have a welded joint in its cross-section, while CDW pipes do not have any joint in its cross-section all through its length.
 

They are called CDW (Cold Drawn Welded) pipes; in some regions, the same pipes are also referred to as CEW (Cold Electric Welded) pipes, and the two names are generally used interchangeably. These pipes are broadly used in the automotive industry and furthermore to manufacture gears, special-purpose machines, hydraulic hardware, apparatus, and so forth. Much the same as seamless precision tubes, they too have low carbon content, are very flexible, reasonable for bowing. If required, these tubes will be toughened after being drawn, fixed, and experience a pickling procedure that gives it a fantastic flawless package process.

ERW Pipe VS. CDW Pipe: What's the Difference?

What are ERW and CDW?

ERW and CDW are both welding process types. ERW stands for electric resistance welding, while CDW stands for cold drawn welding. Both methods use electricity to weld metals together, but they differ in how the electricity is used. Difference between ERW and CDW Steel Pipes.

Difference between ERW and  CDW Pipes

1. Manufacturing Process

There are significant differences in the manufacturing processes of resistance welded pipe (ERW) and cold drawn electric welded pipe (CDW). ERW pipe is formed by heating a strip of steel and passing it through rollers to form it into a cylinder. An electric charge is then used to fuse the material, welding the edges together. In contrast, the CDW process involves pulling a heated steel rod through a die, creating a seamless tube. There are pros and cons to both methods, but it mainly depends on the specific application.

2. Strength and Durability

One of the most critical factors when selecting pipe is its strength and durability. ERW pipe has a smooth surface finish and is generally stronger than CDW pipe. However, CDW pipes are more resistant to external stresses such as vibration and shock. They also have a higher durability limit, meaning they can withstand greater pressures and strains than ERW pipes.

3. Cost and Availability

Another important factor when choosing pipe is its cost and availability. ERW pipes are generally less expensive than CEW pipes, which makes them more popular in the market. However, in some cases, the greater durability and durability of CEW pipe may justify the additional cost. It also depends on material availability, manufacturing costs and shipping costs, which may vary by supplier and location.

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