What is the minimum depth that underground gas piping systems must be installed below grade?

The minimum depth that underground gas piping systems must be installed below grade is 12 inches. This requirement is based on safety standards and regulations that aim to protect the piping from external damage and reduce the risk of gas leaks. Installing the piping at this depth helps ensure it is buried sufficiently to avoid accidental strikes from surface activities, such as landscaping or excavation. Additionally, it provides some insulation from temperature changes and potential corrosive conditions in the soil, which can affect the integrity of the piping over time. Following these guidelines is essential for maintaining a safe and reliable gas distribution system.