How to Guide

41
Low Temperature Recommendations
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(32°F). Charlotte Pipe and Foundry recommends taking proper precautions when installing systems at low temperatures in-
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recommends the following:
1. Reduce water hammer pressure surges to a minimum by:
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for CPVC CTS.
2. Provide more than minimum Charlotte Pipe recommended support spacing.
3. Thrust blocking at branches, changes in direction and end of runs.
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5. Strictly follow chemical resistance recommendations.
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Temperature De-Rating for ASTM D 2846 CTS CPVC SDR 11 Piping Systems
Temperature De-Rating Pressure
°F Factor Rating, PSI
73 1.00 400
80 1.00 400
90 0.91 360
100 0.82 325
120 0.65 260
140 0.50 200
160 0.40 160
180 0.25 100
Example: Determine the maximum allowable operating
pressure for a CTS CPVC piping system with an operating
temperature of 140°F. The de-rating factor from the above
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De-rating Threaded Fittings, Valves and
Unions
Pressure ratings shown are for socket (solvent cement) systems.
The system must always be de-rated to the pressure rating of
the lowest rated system component at the expected maximum
system operating temperature.
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and unions in the installation procedures section of this
manual.
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CPVC Pipe section of this manual.
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DESIGN & ENGINEERING DATA
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always consult the technical recommendations from the
manufacturers of those products.
Use of FlowGuard Gold
®
CTS CPVC all-plastic threaded
male adapters in hot water applications may result in
system failure and property damage.
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Do not exceed the maximum working pressure of any
system components including pipe, fittings, valves, molded
or cut threads, unions, mechanical coupling or flanges.
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