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Buried PVC-O water supply pipes are high-performance polyvinyl chloride water supply pipes modified by a bidirectional axial orientation process. They are specifically designed for underground buried water supply conditions in municipal, industrial, and other applications. They are specifically enhanced to resist soil compression, underground corrosion, sealing and seepage prevention, and adaptability to ground settlement. They also have the core characteristics of high strength, lightweight, and high toughness. Compared with ordinary UPVC and PE buried pipes, they have better durability and reliability under complex buried conditions, making them the high-performance preferred pipe material for buried cold water transmission and distribution networks (main pipes/branch pipes).
1. Made with buried-specific PVC-O resin as the base material, formed through bidirectional axial orientation. The molecules in the pipe body are densely arranged along the axial and circumferential directions, combining high strength and high toughness. Unlike ordinary extruded pipes, it is suitable for complex environments such as buried soil compression and slight ground subsidence.
2. Thin-walled and lightweight design with high ring stiffness. For the same buried compression resistance rating, the wall thickness is significantly thinner than UPVC. Buried pipes save on pipe material and trench excavation space, making transportation and laying more convenient;
3. Diameters cover medium to large sizes (DN50~DN400), adapting to different water supply needs of buried main and branch pipes. High end roundness and precise dimensions ensure superior sealing of buried spigot connections;
4. Equipped with buried-specific elastic sealing ring socket connectors. The sealing rings are resistant to long-term underground moisture and soil corrosion. The interfaces are optimized for anti-detachment and anti-seepage. Large-diameter models can be equipped with heat-fusion butt fittings;
5. The pipe body is fortified with soil corrosion-resistant and anti-underground microbial erosion agents. The outer wall is integrally molded without coating, resistant to sand and gravel abrasion and construction impacts. The inner wall is highly precise and smooth, reducing resistance to long-distance buried water supply;
6. Combining structural rigidity and flexibility, it can adapt to slight underground settlement and minor trench bends without the risk of brittleness or breakage. It is less susceptible to damage from geological changes after burial.
1. Excellent Resistance to Buried Extrusion: Ring stiffness is significantly higher than ordinary UPVC buried pipes, capable of withstanding long-term static loads from underground soil and dynamic loads from light/heavy vehicles without deformation, collapse, or diameter reduction.
2. Strong Underground Corrosion Resistance: Resistant to acids, alkalis, and salts in various soils, as well as weak corrosion from groundwater. Resistant to erosion and wear from underground microorganisms and sediment. The pipe body does not swell, age, or pulverize, and its performance remains undiminished even in buried environments.
3. Zero Leakage and Sealing: A special buried sealing ring ensures long-term zero leakage at pipe joints, effectively preventing underground mud, water, and sewage from seeping into the pipe and contaminating the water transport medium. It also prevents water loss and is suitable for areas with high groundwater levels and prone to water accumulation.
4. Hydraulic Conveyance High water efficiency: The ultra-smooth inner wall and extremely low friction coefficient reduce head loss during long-distance buried water transmission, improving the efficiency of the pipeline network. Furthermore, the inner wall is resistant to scaling and impurity adhesion, ensuring no decrease in water transmission efficiency over long periods.
5. Good impact resistance and geological adaptability: Resistant to impacts from construction sand and gravel, and the compaction of trench backfilling, with no risk of breakage. It also possesses a certain degree of flexibility, adapting to slight underground subsidence and minor trench bends, preventing brittle fracture and enhancing the buried pipeline network's resistance to geological risks.
6. Stable temperature and aging resistance: Adaptable to underground constant temperature environments, with an operating temperature range of -15℃ to 70℃, suitable for buried applications in both northern and southern regions. Its dense and stable molecular structure allows for a buried design service life of over 50 years, eliminating the need for frequent replacement and maintenance.
7. Meets basic pressure resistance standards: Operating pressure of 1.6~3.2MPa covers the conventional pressure requirements for buried cold water distribution in municipal, industrial, and park applications. Long-term buried high-pressure water transmission is free from the risk of pipe bursts or leaks.
