Product Profile Chlorinated polyvinyl chloride (CPVC) is a thermoplastic produced by chlorination of polyvinyl chloride (PVC) resin. Uses include hot and cold water pipe, and industrial liquid handling. CPVC can withstand corrosive water at temperatures greater than PVC, typically 40°C to 50°C (104°F to 122°F) or higher, contributing to its popularity as a material for water piping systems in residential as well as commercial construction. CPVC is used in construction, plumbing (hot and cold water pipe), industrial liquid handling applications and fire suppression systems. Product characteristics CPVC piping systems are considered cost effective and environmentally friendly. Because CPVC can be easily shaped, bent, and welded, handling and installation is uncomplicated. In addition, CPVC provides a long service life, it is highly corrosion resistant. It is recognized by all model-plumbing codes for potable (drinkable) hot and cold water distribution systems. Chlorinated Polyvinyl Chloride is available for purchase in rods, sheets, or tubing in various sizes and quantities. Applications CPVC is used in a variety of industrial applications, where high functional temperature and resistance to corrosive chemicals are desirable. Besides pipe and fittings, it is used in pumps, valves, strainers, filters, tower packing and duct, as well as sheet for fabrication into storage tanks, fume scrubbers, large diameter duct and tank lining. CPVC can take the place of traditional thermoplastic engineering plastic, used in the fields of petroleum, chemical, building materials, ship-making, printing, dyeing, food, and paper-making etc. Production Process CPVC is PVC (polyvinyl chloride) that has been chlorinated via a free radical chlorination reaction. This reaction is typically initiated by application of thermal or UV energy utilizing various approaches. In the process, chlorine gas is decomposed into free radical chlorine which is then reacted with PVC in a post-production step, essentially replacing a portion of the hydrogen in the PVC with chlorine. Depending on the method, a varying amount of chlorine is introduced into the polymer allowing for a measured way to fine tune the final properties. The chlorine content may vary from manufacturer to manufacturer; the base can be as low as PVC 56.7% to as high as 74% by mass, although most commercial resins have chlorine content from 63% to 69%.[citation needed] As the chlorine content in CPVC is increased, its glass transition temperature (Tg) increases significantly. Under normal operating conditions, CPVC becomes unstable at 70% mass of chlorine. Market scenario The market for CPVC resin is showing strong growth in India. The main use is for making pipes for transportation of hot water and chemicals C PVC is a preferred choice to traditional materials such as galvanized iron, which has corrosion issues and polypropylene random copolymer which requires use of adhesives. The present Indian requirement of CPVC resin is met by imports.