EN
PVC Coupling / Straight Socket
Raw Material: PVC resin
Standards: DIN, ASTM, Sch 80/40, JIS, BS, D1785, ISO 1452
Size: 20mm – 400mm (customizable)
- Overview
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Product Introduction
Baishunxing Pipe Industry The PVC Coupling, also known as a straight socket or connector, is an essential component in any piping system. It is used to join two PVC pipes of the same diameter in a straight line. Manufactured from high-grade UPVC (unplasticized polyvinyl chloride), our couplings offer superior sealing performance and structural integrity, making them the reliable choice for water supply, irrigation, and industrial networks worldwide. This fitting serves as the fundamental building block for straight pipe runs, allowing installers to extend pipe lengths continuously from the water source to the point of use. The coupling is designed to slip over the ends of two adjacent pipes, creating a unified, leak-free conduit. Unlike threaded or flanged connections that require gaskets or complex assembly, the PVC coupling relies on solvent welding to become a permanent, monolithic part of the piping system. The material is 100% lead-free and fully resistant to corrosion, rust, and chemical attack. Available in a complete range of sizes, our PVC coupling fits seamlessly into new installations as well as repair and maintenance projects. For engineers, contractors, and farmers, this simple yet critical component ensures that every straight joint in the pipeline performs as reliably as the pipe itself. The coupling maintains the same internal diameter as the pipe, creating no flow restrictions or turbulence at the joint. Produced on our latest automated lines, every coupling meets strict dimensional tolerances for a perfect fit with standard PVC pipes in municipal, agricultural, and industrial applications.
Product Parameters
| Raw Material | PVC resin |
| Standards | DIN, ASTM, Sch 80/40, JIS, BS, D1785, ISO 1452 |
| Size | 20mm – 400mm (customizable) |
| Pressure Rating | PN8, PN10, PN16, PN20 |
Key Features
The core features of our PVC coupling / straight socket cover universal standards support, industrial grade durability, superior corrosion resistance, and hydraulic efficiency.
Universal Standards Support – The coupling is available in a full range of specifications complying with DIN, ANSI Sch 80/40, JIS, and BS international standards. This ensures a perfect match with your existing pipelines regardless of which standard was originally specified. Whether you need Schedule 40, Schedule 80, or metric dimensions, our coupling provides accurate fitment for pressure and drainage systems.
Industrial Grade Durability – The coupling is manufactured from high-density polyvinyl chloride material with a thickened wall design. This construction provides excellent pressure resistance and impact strength, allowing the fitting to withstand the same operating pressures as the pipe itself without cracking or bursting under mechanical stress.
Superior Corrosion Resistance – The coupling is 100% resistant to acids, alkalis, and oxidation. It is completely immune to rust or electrochemical (galvanic) corrosion, making it ideal for chemical fluid transport and aggressive water conditions. Unlike metal fittings that corrode at joints and eventually leak, this PVC coupling remains unaffected by soil chemistry, saline water, or industrial process fluids.
Hydraulic Efficiency – The mirror-smooth interior surface minimizes flow friction and prevents scaling or biological buildup. This smooth finish ensures consistent long-term flow capacity without the pressure losses associated with rough or corroded fitting interiors.
Universal Standards Support – The coupling is available in a full range of specifications complying with DIN, ANSI Sch 80/40, JIS, and BS international standards. This ensures a perfect match with your existing pipelines regardless of which standard was originally specified. Whether you need Schedule 40, Schedule 80, or metric dimensions, our coupling provides accurate fitment for pressure and drainage systems.
Industrial Grade Durability – The coupling is manufactured from high-density polyvinyl chloride material with a thickened wall design. This construction provides excellent pressure resistance and impact strength, allowing the fitting to withstand the same operating pressures as the pipe itself without cracking or bursting under mechanical stress.
Superior Corrosion Resistance – The coupling is 100% resistant to acids, alkalis, and oxidation. It is completely immune to rust or electrochemical (galvanic) corrosion, making it ideal for chemical fluid transport and aggressive water conditions. Unlike metal fittings that corrode at joints and eventually leak, this PVC coupling remains unaffected by soil chemistry, saline water, or industrial process fluids.
Hydraulic Efficiency – The mirror-smooth interior surface minimizes flow friction and prevents scaling or biological buildup. This smooth finish ensures consistent long-term flow capacity without the pressure losses associated with rough or corroded fitting interiors.
Product Advantages
The product advantages of our PVC coupling / straight socket focus on easy installation through solvent welding, a 50-year service life, lead-free safety, and advanced manufacturing.
Easy Installation: Solvent Welding – The coupling uses a simple solvent welding process for connection. This ensures a quick, robust, and 100% leak-proof joint that becomes chemically fused at the molecular level. No threading equipment, gaskets, torches, or specialized tools are required. The welded joint is actually stronger than the pipe itself.
50-Year Service Life – The coupling contains an anti-aging and UV-resistant polyvinyl chloride formulation. This ensures stable performance for over 50 years in both outdoor above-ground installations and buried underground environments. Sunlight exposure does not cause surface degradation, and soil chemicals do not penetrate the material.
Lead-Free & Safe – The coupling is manufactured with a 100% lead-free formulation, strictly meeting international health and safety standards for drinking water. There is zero risk of heavy metal leaching into potable water supplies, making the coupling suitable for municipal water systems, food processing lines, and residential plumbing.
Advanced Manufacturing – Our coupling is produced on the latest automated production lines, ensuring micron-level dimensional precision for every single fitting. Consistent dimensions mean every coupling fits the pipe properly, creating uniform solvent weld gaps that maximize joint strength. There are no loose fits or overly tight assemblies. The PVC coupling also offers significant cost advantages over metal alternatives. It weighs much less, reducing shipping costs and handling fatigue. It never requires replacement due to rust, scaling, or corrosion. The long 50-year service life lowers total ownership cost across the life of the pipeline system. For contractors, fewer callbacks and repairs mean higher reliability and customer satisfaction.
Easy Installation: Solvent Welding – The coupling uses a simple solvent welding process for connection. This ensures a quick, robust, and 100% leak-proof joint that becomes chemically fused at the molecular level. No threading equipment, gaskets, torches, or specialized tools are required. The welded joint is actually stronger than the pipe itself.
50-Year Service Life – The coupling contains an anti-aging and UV-resistant polyvinyl chloride formulation. This ensures stable performance for over 50 years in both outdoor above-ground installations and buried underground environments. Sunlight exposure does not cause surface degradation, and soil chemicals do not penetrate the material.
Lead-Free & Safe – The coupling is manufactured with a 100% lead-free formulation, strictly meeting international health and safety standards for drinking water. There is zero risk of heavy metal leaching into potable water supplies, making the coupling suitable for municipal water systems, food processing lines, and residential plumbing.
Advanced Manufacturing – Our coupling is produced on the latest automated production lines, ensuring micron-level dimensional precision for every single fitting. Consistent dimensions mean every coupling fits the pipe properly, creating uniform solvent weld gaps that maximize joint strength. There are no loose fits or overly tight assemblies. The PVC coupling also offers significant cost advantages over metal alternatives. It weighs much less, reducing shipping costs and handling fatigue. It never requires replacement due to rust, scaling, or corrosion. The long 50-year service life lowers total ownership cost across the life of the pipeline system. For contractors, fewer callbacks and repairs mean higher reliability and customer satisfaction.
Typical Applications
The typical applications of our PVC coupling / straight socket span agricultural, municipal, industrial, and recreational fluid handling systems.
Agricultural Irrigation – The coupling is widely used in automatic sprinkler systems for farms, orchards, and gardens or landscaping applications. It connects polyvinyl chloride pipes in mainlines, submains, and lateral runs throughout irrigated fields.
Municipal Water Supply & Drainage – Municipal utilities rely on this coupling for main urban pipeline networks and residential drainage systems. It provides reliable straight joints in potable water distribution lines, sewer force mains, and stormwater drainage infrastructure.
Industrial Processing – The coupling is ideal for transporting acidic and alkaline media in electroplating plants, chemical manufacturing facilities, and paper mill applications. Its corrosion resistance handles aggressive industrial fluids that would destroy metal fittings within months.
Pools & Aquaculture – Swimming pools and aquaculture facilities use the coupling for water circulation systems and connections for filtration equipment. The lead-free formulation ensures safe water for fish, plants, and swimmers. Additional applications include mining water lines, geothermal systems, and temporary construction water supply networks.
Agricultural Irrigation – The coupling is widely used in automatic sprinkler systems for farms, orchards, and gardens or landscaping applications. It connects polyvinyl chloride pipes in mainlines, submains, and lateral runs throughout irrigated fields.
Municipal Water Supply & Drainage – Municipal utilities rely on this coupling for main urban pipeline networks and residential drainage systems. It provides reliable straight joints in potable water distribution lines, sewer force mains, and stormwater drainage infrastructure.
Industrial Processing – The coupling is ideal for transporting acidic and alkaline media in electroplating plants, chemical manufacturing facilities, and paper mill applications. Its corrosion resistance handles aggressive industrial fluids that would destroy metal fittings within months.
Pools & Aquaculture – Swimming pools and aquaculture facilities use the coupling for water circulation systems and connections for filtration equipment. The lead-free formulation ensures safe water for fish, plants, and swimmers. Additional applications include mining water lines, geothermal systems, and temporary construction water supply networks.
