The serpentine tube (Fig. 1) is widely used in heat exchange equipment such as chemical, pharmaceutical and dairy products. The traditional method of bending a serpentine tube is mainly to add a roller to the bender or to design a special coiler. Many non-professional factories do not have a pipe bending machine. They design and manufacture special bending machines, which are costly, long-term and not economical. At this time, it can be bent by a three-roll bending machine. It only makes two rollers according to the outer diameter of the tube of the circular coil (Fig. 2).
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Cangnan Younglite Electrical Co., Ltd. , https://www.younglitetec.com