EN
PVC Flange (One-piece & Van Stone)
Raw Material: PVC resin
Standards: DIN, ASTM, Sch 80/40, JIS, BS, D1785, ISO 1452
Size: DN15mm – DN300mm (customizable)
- Overview
- Recommended Products
Product Introduction
Baishunxing Pipe Industry The PVC Flange is a critical component for connecting pipelines to valves, pumps, and other equipment. It provides high structural strength while facilitating easy maintenance and disassembly of large-scale equipment. Injection-molded from high-density UPVC (unplasticized polyvinyl chloride), our flanges are robust and offer reliable sealing, making them the preferred choice for industrial water treatment, chemical processing, and municipal engineering worldwide. A flange connection consists of two flanges bolted together with a gasket between them, creating a leak-tight mechanical joint that can be opened and resealed as needed for equipment access. Unlike solvent-welded connections that are permanent, flanged joints allow pumps, valves, tanks, and other components to be removed for servicing without cutting pipelines. Our PVC flange is manufactured from 100% lead-free polyvinyl chloride material, resistant to acids, alkalis, and a wide range of corrosive fluids. The flange does not rust, scale, or require periodic coating. Available in both one-piece and Van Stone designs, and fully compliant with ANSI, DIN, and JIS international bolt pattern standards, our PVC flange interfaces perfectly with both plastic valves and metal equipment. For engineers and plant managers, the PVC flange provides a reliable, corrosion-proof method for connecting polyvinyl chloride piping to industrial equipment.
Product Parameters
Product Parameters
| Raw Material | PVC resin |
| Standards | DIN, ASTM, Sch 80/40, JIS, BS, D1785, ISO 1452 |
| Size | DN15mm – DN300mm (customizable) |
| Pressure Rating | PN8, PN10, PN16, PN20 |
Key Features
The core features of our PVC flange cover versatile designs, international standards compatibility, reinforced structural integrity, and superior chemical resistance.
Versatile Designs – Our flanges are available in one-piece and Van Stone (loose) designs. The one-piece flange has the flange face integrally molded with the pipe stub, providing a single solid unit. The Van Stone flange consists of a separate loose backing ring that rotates freely around the pipe stub. This Van Stone design significantly simplifies bolt-hole alignment and reduces installation difficulty, especially in confined spaces or when connecting to existing equipment with fixed bolt patterns.
International Standards Compatibility – Bolt patterns on our PVC flanges strictly follow ANSI, DIN, and JIS global standards. This ensures a perfect interface with both plastic valves and metal equipment from any manufacturer. Standardized dimensions mean no custom drilling or adapters are required.
Reinforced Structural Integrity – The flange features a thickened plate and optimized rib design on the back face. This reinforcement prevents deformation or cracking under high bolt-torque and high-pressure conditions. The ribs distribute bolting stresses evenly across the flange face, maintaining gasket compression without warping the polyvinyl chloride material.
Superior Chemical Resistance – Our PVC flange is 100% resistant to acids, alkalis, and various industrial chemicals. This makes it ideal for pickling lines, electroplating tanks, and corrosive fluid transport applications. The material requires zero maintenance because it does not corrode, pit, or degrade when exposed to aggressive media.
Versatile Designs – Our flanges are available in one-piece and Van Stone (loose) designs. The one-piece flange has the flange face integrally molded with the pipe stub, providing a single solid unit. The Van Stone flange consists of a separate loose backing ring that rotates freely around the pipe stub. This Van Stone design significantly simplifies bolt-hole alignment and reduces installation difficulty, especially in confined spaces or when connecting to existing equipment with fixed bolt patterns.
International Standards Compatibility – Bolt patterns on our PVC flanges strictly follow ANSI, DIN, and JIS global standards. This ensures a perfect interface with both plastic valves and metal equipment from any manufacturer. Standardized dimensions mean no custom drilling or adapters are required.
Reinforced Structural Integrity – The flange features a thickened plate and optimized rib design on the back face. This reinforcement prevents deformation or cracking under high bolt-torque and high-pressure conditions. The ribs distribute bolting stresses evenly across the flange face, maintaining gasket compression without warping the polyvinyl chloride material.
Superior Chemical Resistance – Our PVC flange is 100% resistant to acids, alkalis, and various industrial chemicals. This makes it ideal for pickling lines, electroplating tanks, and corrosive fluid transport applications. The material requires zero maintenance because it does not corrode, pit, or degrade when exposed to aggressive media.
Product Advantages
The product advantages of our PVC flange focus on excellent sealing, flexible installation, 50-year maintenance-free life, and advanced manufacturing.
Excellent Sealing – When paired with high-quality gaskets (such as EPDM, Viton, or PTFE), our PVC flange ensures a 100% leak-proof connection even under extreme pressure conditions. The smooth, flat sealing surface provides uniform gasket compression across the entire face. The reinforced flange body maintains this compression without relaxation over time.
Flexible Installation – The Van Stone design is particularly suitable for confined spaces or sites where precise pipe alignment is challenging. The loose backing ring rotates freely, allowing bolt holes to be aligned after the pipe stub is already positioned. This eliminates the need to rotate heavy pipe assemblies just to match flange bolt patterns.
50-Year Maintenance-Free Life – Our PVC flange is made from high-grade anti-aging polyvinyl chloride materials. The formulation includes UV and weather resistance, protecting the flange during outdoor storage and operation. The total cost of ownership is significantly lower than metal alternatives because no painting, cathodic protection, corrosion inspections, or replacement due to rust are ever required.
Advanced Manufacturing – Our PVC flange is produced on the latest digital production lines. This ensures perfect flatness of the sealing surface and geometric precision of the bolt holes. Flat sealing surfaces prevent gasket leaks. Accurately positioned bolt holes eliminate the need for reaming or bolt hole enlargement during installation. Additional advantages include lightweight construction for easy handling, complete immunity to galvanic corrosion when connecting to metal equipment, and compatibility with standard gasket materials. For maintenance teams, the flanged connection means pumps and valves can be removed and reinstalled in minutes rather than hours. For plant engineers, the corrosion resistance eliminates unplanned downtime due to rusted or seized flange bolts. Our PVC flange delivers reliable, demountable connections for any polyvinyl chloride piping system requiring equipment access.
Excellent Sealing – When paired with high-quality gaskets (such as EPDM, Viton, or PTFE), our PVC flange ensures a 100% leak-proof connection even under extreme pressure conditions. The smooth, flat sealing surface provides uniform gasket compression across the entire face. The reinforced flange body maintains this compression without relaxation over time.
Flexible Installation – The Van Stone design is particularly suitable for confined spaces or sites where precise pipe alignment is challenging. The loose backing ring rotates freely, allowing bolt holes to be aligned after the pipe stub is already positioned. This eliminates the need to rotate heavy pipe assemblies just to match flange bolt patterns.
50-Year Maintenance-Free Life – Our PVC flange is made from high-grade anti-aging polyvinyl chloride materials. The formulation includes UV and weather resistance, protecting the flange during outdoor storage and operation. The total cost of ownership is significantly lower than metal alternatives because no painting, cathodic protection, corrosion inspections, or replacement due to rust are ever required.
Advanced Manufacturing – Our PVC flange is produced on the latest digital production lines. This ensures perfect flatness of the sealing surface and geometric precision of the bolt holes. Flat sealing surfaces prevent gasket leaks. Accurately positioned bolt holes eliminate the need for reaming or bolt hole enlargement during installation. Additional advantages include lightweight construction for easy handling, complete immunity to galvanic corrosion when connecting to metal equipment, and compatibility with standard gasket materials. For maintenance teams, the flanged connection means pumps and valves can be removed and reinstalled in minutes rather than hours. For plant engineers, the corrosion resistance eliminates unplanned downtime due to rusted or seized flange bolts. Our PVC flange delivers reliable, demountable connections for any polyvinyl chloride piping system requiring equipment access.
Typical Applications
The typical applications of our PVC flange span chemical and pharmaceutical plants, desalination and water treatment, municipal engineering, and pools with aquaculture systems.
Chemical & Pharmaceutical Plants – The flange is used for connection of storage tanks, pump sets, and process pipelines. Stainless steel and carbon steel flanges suffer corrosion in acidic or saline environments, while our PVC flange remains unaffected.
Desalination & Water Treatment – Facilities use our PVC flange for flange connection between filtration equipment and main pipelines. Seawater and brine are highly corrosive to metal flanges but have no effect on polyvinyl chloride.
Municipal Engineering – Cities install our PVC flange for large water meters and pipeline connections within valve pits. The flange allows meter removal for calibration or replacement without cutting the water main.
Pools & Aquaculture – Pool and fish farm operators use the flange for connection of circulation pumps and sand filter systems. The corrosion-proof material handles chlorinated pool water and saline aquaculture water without degradation. Additional applications include industrial wastewater treatment, mining process water lines, and food processing facilities. Our PVC flange provides reliable, leak-proof connections wherever polyvinyl chloride piping meets maintainable industrial equipment.
Chemical & Pharmaceutical Plants – The flange is used for connection of storage tanks, pump sets, and process pipelines. Stainless steel and carbon steel flanges suffer corrosion in acidic or saline environments, while our PVC flange remains unaffected.
Desalination & Water Treatment – Facilities use our PVC flange for flange connection between filtration equipment and main pipelines. Seawater and brine are highly corrosive to metal flanges but have no effect on polyvinyl chloride.
Municipal Engineering – Cities install our PVC flange for large water meters and pipeline connections within valve pits. The flange allows meter removal for calibration or replacement without cutting the water main.
Pools & Aquaculture – Pool and fish farm operators use the flange for connection of circulation pumps and sand filter systems. The corrosion-proof material handles chlorinated pool water and saline aquaculture water without degradation. Additional applications include industrial wastewater treatment, mining process water lines, and food processing facilities. Our PVC flange provides reliable, leak-proof connections wherever polyvinyl chloride piping meets maintainable industrial equipment.
