How should underground piping buried outside of buildings be installed?

Underground piping that is buried outside of buildings should be installed below the local level of frost penetration with protection to prevent damage from freezing temperatures. This is crucial because piping located where frost can penetrate is at risk for freezing, which can cause blockages, breaks, or leaks in the system. Installing the pipes below the frost line ensures that the ambient temperature around the pipes remains above freezing during cold weather, thereby maintaining the integrity and functionality of the gas system.

Additionally, providing protection—such as insulating materials or using specially designed protective casings—enhances the durability of the piping system against thermal stress and external environmental factors. This combination of depth and protective measures is essential for ensuring longevity and reliable performance in medical gas systems, especially in climates where frost penetration is a concern.