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PE (PolyEthylene) Pipes - Pressure vs. Temperature Ratings

Polyethylene pipe temperature and maximum operating pressure.

The maximum operating pressure of a PEH pipe depends on the temperature of fluid and pipe.

PN ratings are based on temperature 20oC.

PE (PolyEthylene) Pipes - Maximum Operating Pressure vs. Temperature
Temperature
(oC)
Maximum Operating Pressure (bar)
PN 6PN 10PN 16
20 6.0 10.0 16.0
30 3.2 8.0 13.0
40 2.0 6.0 11.0
50 1.6 4.0 8.0
60 1.0 3.2 6.0

PEH and PE pipe - temperature and maximum operating pressure diagram

Example - Cold and Hot water Supply

The pressure in a water supply system to an area is 4 bar. The cold water temperature will never exceed 20oC and the hot water distributed within the area with PEH pipes will never exceed temperature 50oC.

From the table above pipes with PN 6 will do for the cold water. For the hot water PEH pipes PN 16  should be selected.

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