Traditionally, tubes connecting is finished by handwork. But our company developed and produced elbow making machine that features in good profiles, compact jointing, stable performance, high efficiency, easy operation and suitable to process various diameters of tubes. It`s easy to operate and it can process tubes with different diameters. It replaced the traditional handwork totally. It suits in tube jointing in such industries as ventilation, refrigeration, environment protection project. There are electric and hydraulic type, both of which have two functions: One is used to process single and double hem, and the other is used to connect and press.