CPVC Duct Flanges

CPVC duct flanges are specialized joint fittings used to connect ductwork in ventilation, fume handling, and exhaust systems. They are made to create a secure, airtight connection between different components of duct systems including pipes, valves, and other equipment for the effective flow of air or gaseous media that may contain corrosive chemicals, hazardous materials, dust, or particulates. CPVC duct flanges are designed to mount at the end of duct pipes or fittings. They feature a flat, circular disc with dedicated bolt holes that allow the flange to be bolted together with another flange or to a flange faced component. The bolted connection creates a strong seal that maintains duct system integrity and can be removed if needed for maintenance, repair, or modifications. CPVC duct flanges are often used with gaskets or sealing compounds to ensure an airtight, leak proof connection. CPVC duct flanges are commonly installed and used in chemical processing, manufacturing, pharmaceuticals, and laboratories where the safe and secure handling of corrosive chemicals, hazardous materials, and particulates is required. 

These are USA made CPVC duct flanges built by Harrison Machine and Plastic® under the trade name SUPERDUCT®, one of the nation’s top manufacturers and brands of thermoplastic ductwork. SUPERDUCT® CPVC flanges are to be used with air and compatible gaseous media in open air, non-pressurized applications only. They are not for use in pressure systems, with liquids, or with known incompatible chemicals. Always verify chemical compatibility prior to use.

CPVC duct flange sizes range from 2″ to 24″ in diameter and come in socket flange and blind flange types. Flanges are made to Iron Pipe Size (IPS) sizing standard for use with IPS or Schedule 40 ductwork. All CPVC duct flanges are 3/16″ thick material with 5/16″ diameter bolt holes. Undrilled socket flanges or flanges with 150# drilling are available on request. Available CPVC duct socket flanges have a slip joint end for permanent installation through solvent or hot air welding. Hot air welding is recommended for socket flanges larger than 14″ in size. Blind duct flanges are made for bolt and hardware installation only. 

CPVC duct flanges are made from FM4910 specification Corzan® CPVC that meets ASTM D1784 classification and quality requirements. They have been tested to meet and/or exceed various ASTM standards for CPVC ductwork to ensure a consistent, high performance product quality, mechanical strength, chemical durability, and physical properties related to working temperature, fire, flame spread, and smoke generation. The technical specifications of CPVC duct flanges guarantee their mechanical strength, chemical durability, and operating temperature range. 

• Material Profile: Type IV Grade I CPVC Cell Class 23447. 
• Color: Light gray. 
• Performance Standards: Meets and/or exceeds CPVC duct ASTM testing standards.
• Pressure: For non-pressurized systems only. 
• Temperature: Approved for up to 200°F (93°C). 
• Sizing Standard: Schedule 40 / IPS thickness standard. 
• Size Options: Range from 2″ to 24″ in diameter. 
• Connection Options: Pre-drilled bolt holes, insertion socket. 

Harrison SUPERDUCT® CPVC flanges are precision engineered to provide a reliable, long lasting service connection in CPVC ventilation systems. Industrial grade Corzan® CPVC offers superior resistance to chemical corrosion, environmental damage and weathering, and working temperatures up to 200°F. CPVC duct flanges are low in weight and easy to handle for installation. They are engineered for compatibility with many common industrial and commercial chemicals, fumes, VOCs, exhausts, dust, and particulates.

• CPVC Material: High performance thermoplastic with superior strength, chemical resistance, and temperature tolerance. 
• Chemical Resistance: Generally resistant to most acids, bases, salts, aliphatic solutions, oxidants, and halogens.
• Regulate Airflow: Rotating disc to control ventilation flow rates.
• Project Matching: Complete range of sizes to meet project needs.
• Heavy Duty: Built for lasting strength and durability in hardworking ductwork systems.
• Airtight: Provides secure, leakproof seal when properly installed.
• Easy Installation: Low weight and damage resistant for easy handling when installing.

Common applications and uses for CPVC duct flanges include industrial and commercial HVAC systems and equipment hookups, chemical processing plants, manufacturing facilities, semiconductor and electronics manufacturing, wastewater treatment, fume scrubbers, filtration systems, laboratories, and research facilities. 

CPVC flanges are an industry professional’s trusted choice for top quality and high performance. The fittings are designed and manufactured to provide the durable, dependable service that hardworking duct systems demand. Engineered to exceed requirements and made using premium materials, our CPVC duct supplies are built to deliver results. Contact us for more information on our products or for details on contractor pricing and availability.