June 2020 Vol. 75 No. 6


Plastics Pipe Institute

The Plastics Pipe Institute (PPI) published a new guide for the use of chlorinated polyvinyl chloride (CPVC) piping systems in commercial buildings. Available on PPI’s website, “TN-62: Suitability and Fitness of CPVC Piping Systems for Commercial Building Applications” describes material advantages and capabilities to consider when designing these systems for commercial plumbing and mechanical situations.

CPVC is a high-temperature plastic pressure piping material that was introduced for potable plumbing applications more than 60 years ago. Advantages include safety of potable water; resistance to corrosion, tuberculation and deposits; chlorine and chloramine resistance; and toughness to survive job-site installations. Also, pipes and fittings are joined using solvent cement or mechanical joints, rather than flame, helping to prevent accidental fires during construction.

“Many people are not aware of the significant differences between PVC and CPVC piping materials,” explained Lance MacNevin, P. Eng., director of engineering for PPI's Building & Construction Division. “CPVC is polyvinyl chloride that has been chlorinated via a free radical chlorination reaction, initiated by ultraviolet light during the manufacturing process.

“The chlorine added to PVC gives CPVC higher temperature performance and improved fire and corrosion resistance.”


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