Comparison of Two Lifespan Prediction Models for Polyethylene Gas Pipes in Civil Engineering

Two life prediction models for polyethylene (PE) pipe were proposed based on long-term hydrostatic testing and physicochemical property analysis methods, respectively. The principles and prediction procedures of each model were elaborated in detail. A case study was conducted, where the two aforementioned models were employed to predict the service lives of the same batch of PE pipes, and results discrepancies between the two life prediction models were analyzed. Limitations as well as the more suitable application scenarios of each prediction model were identified. The relevant research findings could serve as reference for understanding the physicochemical properties of PE pipes.