ERW (Electric Resistance Welded) steel pipe is a type of welded pipe that is formed by rolling or forming a flat steel strip into a cylindrical shape and then welding the edges together using electric resistance welding. It is one of the most common types of welded pipes used in various industries for different applications.
Here are some key features of ERW steel pipe:
Manufacturing Process: ERW steel pipes are produced by the continuous roll-forming of a steel coil or plate into a cylindrical shape. The edges of the strip or plate are heated to the welding temperature using an electric current, and then pressed together using rollers to form a weld. This welding process does not involve the addition of any filler material.
Size Range: ERW steel pipes can be manufactured in a wide range of sizes, from small diameters up to several feet in diameter. The wall thickness of ERW pipes can also vary, allowing for flexibility in meeting specific project requirements.
Versatility: ERW steel pipes are used in various applications such as water and gas pipelines, structural and mechanical applications, oil and gas transmission, and plumbing systems. They are suitable for both above-ground and underground installations.
Strength and Durability: ERW steel pipes generally have good strength and durability due to the welding process, which creates a strong bond between the edges of the steel strip. The pipes undergo various quality control tests to ensure they meet required standards and specifications.
Cost-Effectiveness: ERW steel pipes are often more cost-effective compared to seamless pipes, making them a popular choice for many applications. The manufacturing process is efficient and allows for high production volumes, resulting in competitive pricing.
It's worth noting that while ERW steel pipes offer advantages in terms of cost and versatility, they may have limitations in certain high-pressure or high-temperature applications. In such cases, other types of pipes, such as seamless or welded and seamless pipes, may be more suitable.