PVC-U double-wall corrugated pipes conform to national standard GB/T18477-2001 and are produced with a complete quality assurance system established in reference to the ISO:9001-2000 series standards. They are equipped with a full set of advanced testing methods matching imported production lines, including impact, ring stiffness, flattening, and pressure tests. Raw materials are selected high-quality PVC resin and additives. The technology adopts the latest international standard for PVC-U double-wall corrugated pipes (GB/T18477-2001). Following the production process flow and process document requirements, the pipes are produced under optimal process conditions to ensure high quality.

　　Rigid polyvinyl chloride (PVC-U) double-wall corrugated pipes are a new generation of environmentally friendly products. They are made using polyvinyl chloride (PVC) resin as the main raw material, with various plastic additives added. Employing a hollow ring structural principle, they are formed through twin-screw extrusion and vacuum molding. These products were introduced to foreign markets in the 1960s and 1970s, and began to be widely used in drainage and sewage systems in developed countries in the 1980s, gradually replacing cement pipes, flat pipes, and other traditional pipe materials. They have become the ideal buried drainage and sewage pipes worldwide. China introduced the production line for this product in the early 1990s. Due to the excellent properties of this product, various regions in China have gradually begun using rigid polyvinyl chloride (PVC-U) double-wall corrugated pipes, replacing various underground buried pipe materials.

　　Applicable Locations:

　　Water supply projects; Electrical engineering projects; Construction projects; Sewerage projects; Telecommunications projects; Well drilling projects; Saltwater projects; Natural gas projects; Chemical plants; Paper mills; Brewing and fermentation plants; Electroplating plants; Agricultural land; Mines; Aquaculture; Highway projects; Golf course projects; Fishing plastic rafts.

　　Buried drainage rigid polyvinyl chloride (PVC-U) double-wall corrugated pipes are a new type of pipe material made from polyvinyl chloride resin as the main raw material, with appropriate additives added and extruded. Suitable for outdoor drainage of buildings and municipal sewage, they are lightweight, have low drainage resistance, high compressive strength, are corrosion-resistant, and easy to install. They are an ideal material to replace cast iron pipes and cement concrete pipes. Products are manufactured according to international standard GB/T18477-2001 and have passed relevant department testing, identification, and certification.

　　PVC-U double-wall corrugated pipes were successfully developed and widely applied in Western developed countries in the early 1990s. With the rapid urbanization of China and the increasing emphasis on environmental protection, PVC-U double-wall corrugated pipes will have broad application prospects. Their reasonable hollow ring structure design makes them lightweight, strong, and tough. They are also easy to install, have low resistance, low cost, and strong corrosion resistance. Their practicality and economic efficiency far exceed traditional iron and cement pipes, making them a next-generation product for engineering piping. They are widely used in urban wastewater discharge, low-pressure water supply, agricultural irrigation and drainage, and electrical cable conduits.

　　Product Features:

　　1. Lightweight and easy to handle and transport: PVC pipes are very light, making them convenient to handle, transport, and install, saving labor costs.

　　2. Excellent chemical resistance: PVC-U pipes have excellent acid, alkali, and corrosion resistance, making them very suitable for chemical industrial applications.

　　3. Low fluid resistance: The smooth inner wall of PVC-U pipes results in low fluid resistance. Its roughness coefficient is only 0.009, lower than other pipe materials. For the same flow rate, the pipe diameter can be reduced.

　　4. High mechanical strength: PVC-U pipes have excellent water pressure resistance, external pressure resistance, and impact resistance, suitable for various piping engineering conditions.

　　5. Excellent electrical insulation: PVC-U pipes have excellent electrical insulation properties, suitable for conduits for wires and cables, and electrical wiring in buildings.

　　6. Does not affect water quality: Dissolution tests have confirmed that PVC-U pipes do not affect water quality, making them the best pipe material for current water supply piping.

　　7. Easy installation: The joining and installation of PVC-U pipes is quick and easy, resulting in low construction costs.