The primary limitation of PVC material is the recommended environmental temperature limit of 140° F (60°C). This limit is not only a structural strength limitation but also a corrosion resistance limitation. Both can decrease rapidly as the temperature increases.
Based on laboratory testing results, our PVC duct thru 16", does not require reinforcement and is recommended for round duct systems operating at temperatures up to 100°F with an internal static pressure of 10" W.G. (positive) and 2" W.G. (negative) thru 10 W.G. (negative).
Testing performed at 120° F indicates that the instantaneous collapsing pressure does not change significantly. However, there is insufficient test data at this temperature.
Although Type I PVC can be satisfactorily used for many applications at temperatures up to 140°F, its strength and creep characteristics are altered.
CPVC shall carry a maximum operating temperature of 200° F and has the same self-extinguishing and low conductivity features as PVC.
Title: What is the temperature rating for PVC Duct?
Description: Temperature Applications guidelines for PVC duct.
Published: 1/15/2008
Last Edited: 1/3/2023
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