This machine is a special welding equipment for making reinforced concrete drainage pipe。It is suitable for welding sockets and flat-mouth reinforced skeletons. It is one of the main equipment for producing reinforced concrete drainage pipes.

This machine includes three plates , one is the main plate rotating, the second plate is pushing wire, the other plate is used to Diameter-transformed automaticly. The three plates are controlled and drove by its own motor and variable Frequency control system.