Spiral type double wall corrugated pipe machine consist of : single screw extruder ,profile mould, vacuum calibration tank, cooling tank, haul-off machine, forming machine, cutting machine, stacker.
This machine produced pipe that has similar appearance with double wall corrugated pipe. Adopting spiral forming technology, forming the big diameter sewage pipe . New design can produce double layer and single layer. Inner layer can be yellow color or blue color.