The operating pressure of uPVC pipes will be reduced as the operating temperature increases above 23°C (73°F). To calculate this reduction, multiply the operating
Pressure with the correction factor shown below at a operating temperature of system:
Operating
Temp °C (F)
23°C (73)
27°C (80)
32°C (90)
38°C (100)
43°C (110)
49°C (120)
54°C (130)
60°C (140)
PVC
100%
90%
75%
62%
50%
40%
30%
22%
Dimension and water pressure rating at 23°C of Plain Pipes as per ASTM D 1785 compound grade equivalent to PVC 1120/2120
