We show the practical steps and results so you can judge suitability quickly. In this video, we demonstrate Qingzhou Suba Machinery's advanced double wall corrugated pipe extrusion line manufacturing process. You'll see how our patented horizontal closed loop water cooling system and imported controllers create high-quality pipes ranging from OD40mm to ID1600mm. Watch as we showcase our production capabilities using both new and recycled materials, highlighting why international clients across Europe, Asia, Africa, and South America trust our technology for efficient, stable, and energy-saving solutions.