According to standard references, the expected lifespan of PE/PP (polyethylene/polypropylene) pipes, including DWC (Double Wall Corrugated) pipes, ranges between 50 to 100 years. These estimates are based on the durability and longevity of the materials used in manufacturing these pipes, as well as their resistance to various environmental factors and chemicals commonly encountered in underground installations.
It's important to note that the actual lifespan of the pipes can be influenced by factors such as installation conditions, maintenance practices, and the specific operating environment. Regular inspections, adherence to recommended installation guidelines, and appropriate maintenance can help ensure the optimal performance and extended life expectancy of PE/PP pipes, including DWC pipes.