Double-wall corrugated pipe: cross-section of the double wall structure, its smooth inner walls and outer walls equidistant arrangement has a trapezoidal hollow structural tubing. Nominal diameter (DN): male pipe diameter, the inner diameter of the series and sub-OD Series categories performed simultaneously. Central to the bending stiffness: Pipeline measure resistance to deformation of the ring. Unit KN / m Features Unique structure, high strength, smooth wall, small friction, high turnover, do not do concrete foundation base, light weight, easy handling and installation, quick construction; rubber ring socket connection method is reliable and construction Easy quality assurance; flexible interface. Anti uneven settlement capability; good anti-leakage effect, can withstand a variety of aggressive chemical media; no scaling within the tube, the basic need clear, buried life of five years or more. Pvc double wall corrugated pipe production process is hard PVC as the main raw material, pvc double wall corrugated pipe respectively from the inner and outer extrusion, molding, smooth inner wall, an outer wall trapezoidal corrugated sandwiched between inner and outer walls of the hollow walls plastic tubing. Applications 1, municipal engineering. It can be used for drainage, sewage 2, construction. For building rainwater pipes, underground drainage, sewage, ventilation tubes 3, electrical telecommunications engineering. Available for the protective tube 4 various power cables, railway, highway traffic. Use of communications cables, optical cable protective tube 5, industries. pvc double wall corrugated pipe is widely used in chemical, pharmaceutical, and other industries outfall surrounded by 6, agriculture, garden projects. Farmland, orchards, tea plantations and forest irrigation 7, road works. pvc double wall corrugated pipe used for railway, highway infiltration, drainage 8, mines. pvc double wall corrugated pipe do mine ventilation, water to drain