CPVC pipe has a C-factor of 150 steel pipe's C-factor is 120 when it's new, and decreases as it ages, due to scale build-up. Pipe size and fluid velocity influence friction loss. The life expectancy of steel varies depending on corrosion factors and other environmental considerations.Ī calculation known as the Hazen-Williams C-factor is used to describe the amount of friction loss - the loss of pressure caused by the resistance of water flow. CPVC systems have a 50-year life expectancy and are rated for continuous service for 175 pounds per square inch (psi) at 150-degrees F. With their natural immunity to scale, corrosion, and microbiologically influenced corrosion (MIC), CPVC pipe and fittings offer long, low-maintenance service lives that typically exceed traditional metallic systems. To understand why CPVC fire-sprinkler systems have gained an increasingly greater market share in the sprinkler industry, it's important to understand the features and benefits of this alternative piping material.
In fact, NFPA regulations specify that CPVC pipe and fittings are the only nonmetallic system permitted for use in a standalone fire-sprinkler system or one that's installed in an exposed environment, thanks to the material's superior performance capabilities. The pipe also meets requirements for several other National Fire Protection Association (NFPA) codes for single- and multi-family residential installations. In commercial facilities, specification and installation is in done in accordance with NFPA 13: Standard for the Installation of Sprinkler Systems. First used in water-distribution systems in 1959 and introduced to the fire-sprinkler market in the 1980s, CPVC piping systems have steadily grown in popularity because of their unique combination of features and benefits. Approved for light-hazard standalone and multipurpose sprinkler systems in both concealed and exposed settings, chlorinated polyvinyl chloride (CPVC) pipe and fittings meet the requirements of all major building codes as an alternative material in modern sprinkler-system design.įound in high-rise buildings, hotels, healthcare facilities, and college dormitories in more than 40 countries, CPVC has proven to be a highly effective alternative to steel pipe in light-hazard, wet-sprinkler systems.
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