Characters of HDPE large-caliber hollow-wall winding pipe production line We absorb the latest domestic and overseas technology and develop the buried wound production lines and large-diameter FR - PP winding production lines which can produce diameter φ200 - φ2200 drainpipe of high quality. The pipes more and more become the mainstream of urban drainpipe products and will gradually replacing steel, cement tube, and other plastic pipes. This production line adopts advanced PLC computer control, double layer pressure reducing screw, and complex head, including irregular pipe extruder, welding extruder, twine forming machine, cutting machine, and related auxiliary constitute, with large quantity, high production efficiency, stable operation, high stiffness of pipe ring, small weight per unit meter, optimal creep resistance performance, convenient connecting and economical construction etc.