CPVC tubing comes in nominal sizes ranging from 1/2 to 2 in. copper tube size (CTS), and pipe sizes ranging from 1/2 to 24 in. (Sch 40/80) iron pipe size (IPS). CPVC tubing is SDR11 (1/2 to 2 in.) with standard hydrostatic pressure ratings of 400 psi at 73ºF (2,750 kPa at 23ºC) and 100 psi at 180ºF (690 kPa at 82ºC). Consult the specific CPVC pipe manufacturer's literature and listings for appropriate pressure ratings. CPVC tubing and pipe are sold in straight lengths.
PVC (polyvinyl chloride) that has been chlorinated via a free radical chlorination reaction. CPVC is produced by adding chlorine to PVC in a water slurry or fluidized bed chlorination process. The chlorination reaction is initiated by ultraviolet light. The chlorinated PVC is compounded with ingredients necessary for the desired properties for further processing. The chlorine added to PVC gives CPVC higher temperature performance and improved fire and corrosion resistance.
CPVC is a high-temperature plastic pressure piping system introduced for potable plumbing in 1959. It has also been used extensively in fire sprinkler systems since 1985. This material is also used for many industrial and process piping applications. CPVC pipe is available in nominal sizes from 1/2" to 24" and is approved in all model plumbing and mechanical codes across the United States and Canada. In addition, CPVC pipe and fittings from select manufacturers are listed for light hazard fire sprinkler systems, as defined in NFPA 13, 13R and 13D standards.