Qingzhou Suba Machinery Co., Ltd. is located in Qingzhou city, Shandong Province. As an ancient city, Qingzhou has very convenient transportation, such as railway, expressway, highway, etc. For many years, Qingzhou Suba Machinery Co., Ltd. has devoted itself to research and develop new technology on machinery. Combining the most advanced technology and new material, we developed various extrusion lines for plastic double wall corrugated pipe.As a top professional manufacturer of plastic pipe machines in China, we are always engaged in innovating new technology. With the advanced technology and remarkable quality, we are the leading manufacturer of plastic double wall corrugated pipe machines and enjoy a high reputation in China.Most of our employees are excellent skilled workers, especially the R&D engineers, technicians and equipment debugging persons who have been in this industry for several decades. At present, our main R&D machines are: 90-250mm, 200-600mm and 200-1000mm extrusion lines for plastic double wall corrugated pipe with horizontal water cooling structure, imported control system, sealed water cooling circuit, etc.We have obtained many utility model patents and invention patents at present. With the improving technology, we will supply our customer better machines and service in the future.