HDPE double wall corrugated pipes are used for drainage, waste water and serwage.Sunlight manufactures extrusion line for producing HDPEcorrugated pipesin diameters of OD 63mm up to 1500mm.Thecomplete line is operated andcontrolled by a automation system, which enables customers to producethe pipes in hight quality .pipe diametersingle screw extruderforming machine spray bath cuttingsaw stacker63-160ODSJ-65×30SBZ160ASQG160AJGJ1120SJ-90×3063-250 ODSJ-90x30SBZ250LQM250QGM250JGJ250SJ-75x30200-400 IDSJ-75×33SBZ500CLQM6330QG6330AJGJA500SJ-75×30500-800IDSJ-90×33SBZ1000CLQM1000QG9030AJGJ1000SJ-120×33800-1200IDSJ-120×33SBZ1500CLQM1500QG1500JGJ1500SJ-150×331. Co-extrusion technology 2. The die head has two structures: independent extrusion structure andco-extrusion structure 3. Die head have water and air circular system and form the double wall corrugated pipe bycooling water and compressed air. 4. Extruder and forming machine can affect ganged function 5 . Manual and automatic function 6. Corrugator adopt horizontal and full closed structure, easy operation and beautiful,free appearance 7. Forming moulds cooled by air and water.