CPVC has been used successfully in residential, commercial and industrial applications for nearly 50 years. It is most commonly used in single-family and multi-family hot and cold water distribution systems. However, it can be used for residential fire sprinkler systems, chemical drain waste systems and industrial processing. Key advantages of CPVC include its resistance to corrosion, pitting, and scaling, ease of installation and light weight. CPVC pipe has a higher temperature resistance and is ideally suited for hot water plumbing. It can compete with Polybutene1 piping system in this application. The installation of CPVC pipe is as simple as that of PVC. It also requires solvent sealing instead of heat sealing required for PE pipe. CPVC is as safe as PVC pipe in its production, handling and installation.
Chlorinated PVC called CPVC is PVC with chlorine on its hydrocarbon backbone instead of one in PVC. It is therefore a heavier molecule and results into higher density compared to PVC, like PVC but even more difficult to process. CPVC is highly flame retardant. It has 60 Limiting Oxygen Index (LOI) indicating it requires 60% (or almost 3 times of normal atmospheric oxygen). Though PVC and CPVC belong to the plastics family and possess similar core materials, they perform very differently. The chlorination process used in making CPVC gives the material its superior performance in both high temperature and high pressure applications. The extra chlorine molecule makes CPVC very difficult to burn. CPVC will not sustain a flame on its own as there is not enough oxygen in the atmosphere to make it burn. When the flame source is removed, CPVC will self-extinguish. Additionally, CPVC should not be confused with polybutylene piping, which suffers from reliability issues because it could react unfavorably to some elements in various water systems. It's manufacture is somewhat more difficult and is in the hands of a very few suppliers.
It was first commercialized by BF Goodrich that has now become Noveon. It then sold CPVC to Lubrizol in 2001. Lubrizol supplies CPVC compounds under Temprite and also supplies CPVC processed products under Corzan brand name. Compared to PVC which has the global consumption of more than 34-35 mln tons CPVC is a niche polymer & has small consumption in the World. Similarly there are very few processing industries involved in processing of CPVC. India has few well known processors of CPVC-Ajay Industrial Corporation, Ashirvad Pipes Pvt. Ltd., Astral Polytechnik Ltd.
Benefits of CPVC
CPVC is an attractive alternative to glass, stainless steel, lined steel, high silicon cast iron, PP (polypropylene) and PVDF (polyvinylidene fluoride) for chemical waste and an excellent choice for long-term value. The material can withstand temperatures up to 220 degrees F. In many cases, CPVC is the most suitable solution on the market because it overcomes the most common drawbacks associated with other materials. CPVC is much easier to join than PP or PVDF systems, which require a mechanical or heat fusion installation. CPVC pipe is lightweight � approximately one-sixth the weight of iron � and requires no special tools for cutting. They are joined by solvent cement, the most popular material used in the chemical processing industry to join thermoplastic pipe and fittings.