How long can PPR water pipes last?

According to the material properties of random copolymer polypropylene, it normally takes 50 years at a temperature of 60°C before the inflection point of mechanical properties occurs. Under normal circumstances, even in summer, the water temperature conveyed by PPR water pipes is only about 20°C. And under the condition of 20°C, the ring stress of the material can always be maintained above 10MPA after about 50 years of use, which is sufficient to meet the daily water supply pressure. So PPR material can basically ensure that PPR water pipes can be used for more than 50 years under normal circumstances.