GB/T 15558.5 - 2023 focuses on the system suitability of buried polyethylene (PE) (PE) piping systems for gas. It specifies the performance requirements of each component of the system, covering pipes, fittings, etc. The suitability of the entire piping system under different operating conditions is evaluated through rigorous testing methods, such as stress testing, connection Reliability testing, etc. This standard provides the basis for the design, installation and acceptance of gas buried PE piping systems to ensure stable and safe transportation of gas, helping to ensure the Reliability and safety of gas supply systems.