Pressure/Temperature Relationship
時間：2016-07-09 10:38:22點擊：次
Maximum Operating Pressure - PSI (Water @ 7°F)
1. Threading Schedule 40 and SDR/PR pipe is not recommended.
2. Threading Schedule 80 pipe above 4" is not recommended.
3. CPVC threaded connections should be avoided when possible at elevated temperatures and pressures. (Consult Hydroseal)
4. The operating pressures listed above are based on the hydrostatic design of the product using water as a test medium at 73oF.
Maximum Operating Pressure - PSI (Water @ 7°F)
The working pressure of PVC and CPVC pipe is directly affected by temperature changes. When the operating temperature of the pipe increases, the pipe loses its
stiffness and tensile strength decreases. A drop in pressure capacity results. The drop can be calculated using this chart. Multiply the pipe's maximum working pressure by the temperature correction factor for a known temperature.Example: For 2" Schedule 80 PVC pipe, the maximum working pressure is 400 PSI . I f the operat ing temperature is known to be 110oF, the correction factor can be found on the chart to be 0.50. The adjusted pressure would then be 400 x 0.50 = 200 PSI.
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