How does plastic piping perform in high and low temperature environments?

1. High Temperature Resistance

Taking fluoroplastics (PTFE, FEP, PVDF, ETFE, PFA) as an example, their maximum operating temperature can reach 260℃, with a low temperature limit above -18℃.

Conventional plastic piping (such as PPR and PVC) can be used stably for a long time below 90℃, but softening or even failure will occur above 95℃.

2. Low Temperature Toughness

PPR pipes maintain a certain degree of toughness in low-temperature environments ranging from -20℃ to -40℃, but are prone to brittleness below 5℃, requiring the selection of low-temperature-specific pipes or thickened-walled pipes.

HDPE and PE-RT perform well in the range of -40℃ to -20℃, suitable for heating or water supply systems in cold regions.

3. Comprehensive Performance Testing

By testing pipes in a low-temperature/high-temperature cycling chamber (-80℃ to 150℃) for indicators such as pressure resistance and heat distortion temperature, the reliability of the material under extreme temperatures can be verified.

Industry standards require that the pipeline remain "non-brittle" at -20°C and "non-flowing" at 80°C to ensure safe operation in extreme environments.