This line provides manual and automatic PVC pipe socket making including “U” or “R” sockets. Mostly it is following the extrusion line, matching with slotting or screwing machines. It can also work separately. Our belling machine has two heating ovens. Before belling, the pipes will be heated in the heating oven. And when the pipes sending to belling, another pipe will be sent to heating. Therefore, the line has high output and fast working speed.