The line to make HDPE/PP/PVC(different extruder) double-wall corrugated pipe which are mainly applied for drainage, sewage; Molding machine and die are of high precision and sound interexchange. Mould cooling by water or ai, making and belling pipe at the same time. Pipe Diameter: φ90-φ160 φ200-φ400/500 φ500-φ800/1000 φ600-φ1200