What is the difference between LSAW and ERW, which are both straight-seam steel pipes?
In the field of steel pipe manufacturing, LSAW (Longitudinally Submerged Arc Welding) and ERW(Electric Resistance Welding) are two different welding technologies, each of which has its own unique characteristics and application scenarios.
LSAW steel pipe, also known as submerged arc welded straight seam steel pipe, is produced by pressing (rolling) a steel plate into a tube blank in a mold or forming machine, and then adopting double-sided submerged arc welding. This welding technology is suitable for the production of large-diameter and thick-walled steel pipes, with good toughness, plasticity, uniformity and compactness of weld seams, and is suitable for the construction of high-strength and high-quality long-distance oil and gas pipelines.
ERW steel pipe, that is, straight seam resistance welded steel pipe, is a welding technology that heats the edges of steel pipes by high frequency current to fuse them together. ERW steel pipe has the advantages of fast production speed, small heat affected zone, difficult oxidation and excellent weld structure and properties, and is especially suitable for the production of thin-walled steel pipes.
In practical application, LSAW steel pipe is often used for oil and gas pipelines in special environments such as alpine zone, seabed and urban densely populated areas because of its large diameter, thick wall, high pressure resistance, low temperature resistance and strong corrosion resistance. ERW steel pipe is widely used in the field of oil and gas storage and transportation because of its high efficiency and economy.
Both the pursuit of high quality in complex and harsh environment and the consideration of high efficiency and economy in large-scale construction occupy an important position in the steel pipe field, which provides strong support for industrial development and energy transmission. They complement each other and jointly promote the progress and development of related industries.
