The simplicity of working with Corzan® CPVC is renowned by installers of plumbing and HVAC piping systems. Once trained in proper techniques, they come to find that most projects can be completed with only a few handheld tools. So when the need arises to integrate CPVC pipe into existing systems of copper, stainless steel, carbon steel or galvanized steel, the same installation basics make the job cost-effective and straightforward.
Likewise, engineers have two priorities when they are planning an integration – to minimize downtime and maximize value by keeping installed costs low while setting up the system for extended life. Thanks to Corzan CPVC’s durability, corrosion resistance, high temperature resistance and compatibility with water disinfection chemicals, that consideration of extended service life is easily met.
Fortunately, CPVC – and Corzan Piping Systems in particular – can be specified for integration into metal systems, unlike some other plastics that can suffer degradation from proximity to copper ions. Due to its chlorinated structure, Corzan CPVC has inherently good resistance to oxidizers, and its amorphous structure and high glass transition temperature make Corzan CPVC much less permeable to oxidizers and metal ions than polyolefins and other semi crystalline materials. It is especially important to know this for water distribution system projects. Depending on the pipe size, several different joining technologies are available for mixed-material integrations.
If the piping is two inches or less, the piping can be placed into service right away with threaded connections/adapters. Many kinds of small pipe adapters are available on the market, such as male and female metal-to-CPVC transition fittings. As the two fittings are threaded together, the opposite tapers force thread friction, with the outside diameter of the male getting smaller towards the end of the fitting and the inside diameter of the female narrowing with depth. This method forms the seal without the use of a gasket.
When the piping is 2-1/2 to 6 inches, the transition from one material to Corzan CPVC often occurs using flanges. ASME B16.5 150# flanges of different materials will stay strong, and maintain the same pressure rating as the pipe and fittings, so long as they are properly bolted together.
If the piping is larger than two inches up to 12 inches, the method for integrating Corzan CPVC into a metal or mixed piping system involves mechanical couplings. If the correct couplings and compatible gaskets are selected and installed properly, the metal system will experience no deration beyond the operating range of the piping system. Mechanical joining involves no cure times, which is ideal for alterations and other work in larger facilities, as drying time is eliminated, and plumbing system shutdown time is dramatically reduced. Follow these steps for working with mechanical couplings:
If you need help selecting the best approach to integrating Corzan Piping Systems with metal, as well as the FBC™ System Compatible Program’s compatible ancillary products, contact us today.