
Sn8 Sn4 400mm 500mm 600mm 800mm Large Diameter HDPE Double Wall Corrugated Pipe. High Compressive Strength: Double-wall design enhances carrying capacity and withstands greater external pressure. Corrosion Resistance: Excellent performance resisting corrosive elements in various soil and water conditions. Lightweight & Easy Install: Reduces labor costs and maximizes delivery and installation efficiencies. Low Fluid Friction: Smooth inner wall reduces friction loss and improves flow efficiency. UV Resistance: HDPE material provides good UV resistance for outdoor environments. Flexible & Durable: Adapts to ground subsidence and movement, extending service life. Wide Size Range: Available in sizes from 200mm to 800mm with SN4 and SN8 stiffness classes. Global Production Network: 28 bases in China, Russia, USA, Europe, and Southeast Asia to save shipping costs.