Description

• Precision Injection Moulding Technics Utilizing high-pressure injection moulding instead of fabrication results in a monolithic structure with consistent mechanical properties across all S50 to S200 sizes. For the contractor, this precision ensures that every joint responds uniformly to thermal expansion and contraction, significantly reducing the probability of stress-induced fractures at the connection points.
• Enhanced Material Wear Resistance The specialized PVC-U formulation provides high surface hardness and abrasion resistance, which protects the fitting's integrity against the constant friction of suspended solids and grit found in municipal rainwater and sewage systems. This technical property extends the operational lifecycle of the drainage network, reducing the frequency and cost of subsurface maintenance or replacement.
• Hydraulic Efficiency via Smooth Internal Bore The moulding process achieves a low friction coefficient on the interior walls, preventing the accumulation of biofilm and sediment that typically causes clogs in traditional cast iron systems. This improved flow velocity allows engineers to design systems with a smaller installation slope, which optimizes the indoor clear height in commercial buildings and reduces trenching depth in municipal projects.
• Chemical and Corrosion Neutrality As a thermoplastic material, these fittings are naturally inert to acids, alkalis, and salts commonly present in industrial wastewater and corrosive soil environments. Unlike metallic alternatives, they do not require external coatings or cathodic protection, ensuring that the sewage system remains structurally sound without the risk of electrochemical corrosion or pitting.
• High Strength-to-Weight Ratio While providing the necessary impact resistance to withstand site handling and backfilling pressures, these fittings weigh approximately one-fifth of equivalent cast iron components. This physical characteristic simplifies logistics and on-site positioning, allowing for faster installation cycles and a measurable reduction in specialized lifting equipment and labor hours.
• Solvent Weld Joint Reliability The socket design is optimized for adhesive connection methods, creating a molecular bond between the pipe and fitting that exceeds the tensile strength of the pipe itself. This creates a continuous, rigid drainage line that resists root penetration and soil movement, providing the long-term sealing security required for high-density residential and industrial waste management.
• Impact and Shock Resistance Properties The molecular structure of the PVC-U used in these fittings is designed to absorb and dissipate mechanical energy, meeting the impact strength requirements defined in GB/T standards. This resilience minimizes the risk of brittle failure during accidental drops on construction sites or under fluctuating external loads, ensuring the integrity of the buried infrastructure.

Scope of application

• High-Rise Residential and Multi-Unit Building DrainageIn vertical residential infrastructure, these fittings serve as the primary connectors for sanitary waste and greywater discharge systems. The precision injection moulding ensures leak-proof solvent weld joints for kitchen and bathroom waste stacks, handling domestic effluent at ambient temperatures. The smooth internal bore is critical here to prevent the accumulation of household fats and solids, maintaining flow velocity in high-density DWV (Drain, Waste, and Vent) configurations.
• Municipal Stormwater and Rainwater ManagementThese fittings are utilized in urban runoff systems to connect lateral collector pipes to main stormwater arteries. Designed to handle rainwater containing suspended silt and abrasive grit, the high wear resistance of the PVC-U material prevents internal erosion during peak flow events. The S110 to S200 sizes are frequently deployed in municipal projects where structural integrity under soil load and resistance to microbial corrosion from stagnant water are essential.
• Commercial Complex and Institutional Sewage NetworksFor large-scale commercial facilities like shopping centers, hospitals, and office towers, these fittings facilitate the integration of complex horizontal drainage branches. They are engineered to withstand the intermittent discharge of cleaning chemicals and mild detergents found in commercial wastewater. The standardized GB/T dimensions allow for rapid installation in ceiling voids and service shafts where space for plumbing assembly is constrained.
• Industrial Process Wastewater DischargeIn industrial environments, specifically within chemical processing and laboratory facilities, these UPVC fittings are used for the gravity-fed disposal of corrosive process fluids. The inert chemical properties of the material make it suitable for transporting weak acids, alkaline solutions, and industrial salts that would typically cause pitting in metallic pipe systems. This application relies on the fitting's ability to maintain structural wall thickness despite continuous chemical exposure.
• Water Treatment Plant Auxiliary PipingWithin water treatment and desalination facilities, these fittings are integrated into the sludge dewatering and backwash drainage circuits. They manage the transport of treated effluent and chemical-laden backwash water at low pressures. The UV-stabilized white PVC-U composition and high shock resistance make them suitable for both exposed and buried installations within the plant’s auxiliary infrastructure.
• Agricultural Irrigation and Subsurface DrainageIn large-scale agricultural operations, the S160 and S200 fittings are used in low-pressure irrigation manifolds and field drainage systems to manage groundwater levels. Their resistance to fertilizers, pesticides, and soil minerals ensures long-term performance in buried environments. The robust moulding technics provide the necessary stiffness to resist deformation from heavy machinery surface loads and varying soil pressures.

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