What is the difference between ERW and CDW pipe
In the huge territory of industrial manufacturing, steel pipe, as the basic and key material, supports the development of many industries. Among a wide variety of steel pipe products, ERW pipe (straight seam resistance welded pipe) and CDW pipe (cold-drawn welded pipe) have become the most attractive pipe types by virtue of their respective characteristics. Although they may be somewhat similar in appearance, we will find that there are significant differences in many key dimensions. From the core link of manufacturing technology, the production process of ERW pipe has industrial characteristics. With the help of the heat generated by high-speed current, the steel is fused and welded at high temperature, and finally a pipe is formed, and this process also leaves a clear welding line on the surface of ERW pipe. In contrast, the manufacturing of CDW pipe is to use precision dies and cold drawing process to gradually draw steel into shapes at room temperature, thus creating a seamless pipe appearance with smooth surface and no obvious weld. This essential difference in manufacturing technology not only shapes their intuitive differences in appearance, but also lays the foundation for the subsequent performance. In terms of strength performance, the weld area of ERW pipe is strengthened due to the effect of high temperature and high pressure during welding, and it has high weld strength.
In the huge territory of industrial manufacturing, steel pipe, as the basic and key material, supports the development of many industries. Among a wide variety of steel pipe products, ERW pipe (straight seam resistance welded pipe) and CDW pipe (cold-drawn welded pipe) have become the most attractive pipe types by virtue of their respective characteristics. Although they may be somewhat similar in appearance, we will find that there are significant differences in many key dimensions. From the core link of manufacturing technology, the production process of ERW pipe has industrial characteristics. With the help of the heat generated by high-speed current, the steel is fused and welded at high temperature, and finally a pipe is formed, and this process also leaves a clear welding line on the surface of ERW pipe. In contrast, the manufacturing of CDW pipe is to use precision dies and cold drawing process to gradually draw steel into shapes at room temperature, thus creating a seamless pipe appearance with smooth surface and no obvious weld. This essential difference in manufacturing technology not only shapes their intuitive differences in appearance, but also lays the foundation for the subsequent performance. In terms of strength performance, the weld area of ERW pipe is strengthened due to the effect of high temperature and high pressure during welding, and it has high weld strength.
