Description

• PVC-U Pressure Pipe for Water Supply SystemThis UPVC pressure pipe is engineered for high-performance water transportation in municipal, agricultural irrigation, and industrial plumbing systems. It serves as a durable solution for underground and indoor cold water distribution, effectively addressing the need for hydraulic efficiency and chemical stability in pressurized environments.
• Lead-Free Material Composition and Potable Water SafetyThe unplasticized polyvinyl chloride (PVC-U) resin is formulated without lead-based stabilizers or harmful plasticizers, ensuring the material remains chemically inert. This prevents the leaching of toxic substances into the fluid stream, meeting the strict hygiene requirements of GB/T 10002.1 and ASTM standards for potable water supply. It provides project owners with a certified, non-toxic medium for safe drinking water delivery.
• Hydraulic Performance and Low Surface RoughnessWith an internal roughness coefficient of approximately 0.009, the smooth interior wall of these PVC-U pipes minimizes fluid friction compared to traditional metallic piping. This high hydraulic capacity allows for increased flow rates at equivalent diameters and significantly reduces the energy consumption of pumping stations. For long-term operations, the smooth surface prevents the accumulation of scale and fouling, maintaining constant system efficiency.
• Chemical Resistance to Residual Chlorine and Soil AcidsThe polymer structure is highly resistant to chemical attack from acids, alkalis, and salts commonly found in underground environments, as well as residual chlorine used in water disinfection. Unlike polyolefin materials (such as PE or PPR), UPVC pressure pipes do not suffer from oxidative degradation caused by chlorinated water. This resistance eliminates the need for expensive anti-corrosive coatings and protects the pipe from both internal and external chemical erosion.
• Thermal Insulation and Condensation ControlThe thermal conductivity of PVC-U is approximately 1/300 of galvanized steel, acting as an effective natural insulator for the transported water. This low thermal transfer rate reduces the risk of external pipe condensation in indoor installations and minimizes temperature fluctuations of the water. For the contractor, this reduces the necessity and cost of additional thermal insulation layers in many climate conditions.
• Biological Impedance and Bacterial Growth InhibitionThe material properties of UPVC water pipes provide high biological impedance, creating a surface that is unfavorable for the attachment and growth of bacteria or algae. Bacterial growth rates in these pipes are significantly lower than in other plastic or metal alternatives. This ensures that the water quality remains consistent from the source to the point of use, reducing the maintenance costs associated with system disinfection and flushing.
• Lightweight Construction for Logistics and Site SafetyWith a density of approximately 1,400 kg/m³, this pipe is roughly 1/6 the weight of steel pipes, facilitating easier handling during transport and onsite placement. The reduced weight allows for manual handling of smaller diameters and requires lighter lifting equipment for large-bore pipes. This lowers logistical expenses and improves site safety by reducing the mechanical complexity of the installation process.
• Integrated Jointing Systems for Rapid InstallationThe pipes are designed for connection via solvent cement welding or integrated rubber ring gaskets (for larger diameters), requiring no specialized electrical fusion or heavy welding equipment. These cold-jointing methods provide reliable, leak-proof seals that can withstand the rated working pressure immediately after curing. This significantly accelerates the project timeline and reduces the labor cost per kilometer of pipeline installed.
• Long-Term Material Stability and 50-Year Service LifeBased on long-term hydrostatic stress testing and historical engineering data, the material maintains its mechanical integrity for a service life exceeding 50 years under standard operating conditions. The high chemical stability of the PVC-U molecule prevents premature aging and brittleness. This longevity ensures that the underground infrastructure remains a stable asset, minimizing the risk and cost of emergency repairs or premature system replacement.

Scope of application

• Municipal Water Distribution and Main Supply LinesIn urban infrastructure projects, these PVC-U water supply pipes function as buried main pipelines and distribution networks for the transport of treated potable water. The unplasticized material is immune to the corrosive effects of aggressive soils and residual chlorine used in municipal disinfection. These systems are ideal for long-range water conveyance due to their low friction loss, ensuring stable hydraulic pressure across city-wide grids under working pressures ranging from PN6 to PN25.
• Agricultural Irrigation and Automation SystemsFor large-scale agricultural engineering, these pipes serve as the primary conduits for mechanized irrigation systems, including sprinkler and drip irrigation setups. They are utilized to transport surface water or groundwater at ambient temperatures to field distribution points. The high chemical resistance allows for the safe integration of water-soluble fertilizers (fertigation) without risk of internal pipe corrosion, providing a cost-effective solution for both buried and partially exposed rural water networks.
• Industrial Process Fluid HandlingWithin industrial facilities such as chemical processing, electroplating, and paper mills, UPVC pressure pipes are deployed to transport non-oxidizing acids, alkalis, and saline solutions. They are specifically used in cooling water circuits and process lines where metallic pipes would fail due to electrochemical corrosion. The biological impedance of the material also makes it suitable for secondary process water where bacterial growth must be minimized to prevent equipment clogging.
• Building Cold Water Services and PlumbingIn civil and commercial construction, these pipes are installed as vertical risers and horizontal distribution lines for potable water supply in residential complexes and high-rise buildings. The lightweight nature of the pipe reduces the structural load on the building's piping shafts. Due to their low thermal conductivity, these pipes effectively minimize external condensation in humid environments, reducing the need for extensive insulation in non-heated water delivery applications.
• Landscaping and Turf Management SystemsFor the development of public parks, sports complexes, and golf courses, PVC-U pipes are utilized for the circulation of reclaimed or fresh water in decorative fountain systems and automated turf hydration networks. The material's resistance to scaling ensures that spray nozzles and emitters remain free of debris over long-term operation, while the solvent cement jointing provides the necessary structural integrity for systems subject to frequent pressure cycling.
• Aquaculture and Water Treatment FacilitiesIn fish farming and water purification plants, these pipes are used for the intake and discharge of fresh or salt water at ambient temperatures. The lead-free and non-toxic formula ensures that no heavy metals or harmful stabilizers leach into the aquatic environment, maintaining the biological safety required for sensitive marine life. The smooth interior prevents the buildup of bio-films and mineral deposits, ensuring consistent flow rates in filtration loops.

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