What is the minimum cover required over all underground metallic piping?

Prepare for the Propane Certification Test. Study with targeted flashcards and multiple-choice questions, each offering hints and insights. Ensure your readiness for the exam!

The minimum cover required over all underground metallic piping is 12 inches. This requirement is in place primarily to ensure the safety of the pipeline from physical damage and to protect it from environmental factors. A minimum cover of 12 inches helps to minimize the risk of accidental impacts from surface activities, such as landscaping or construction, which could compromise the integrity of the piping.

Additionally, adequate cover assists in maintaining the temperature of the gas within the piping and minimizes the risk of corrosion, as it provides a barrier against moisture and other potentially harmful elements in the soil. This specification is often outlined by regulations that govern safe underground installations and practices to ensure longevity and reliability of the piping systems used for transporting propane and other gases.

Other cover depths, such as 6, 18, and 24 inches, do not align with the established guidelines for the minimum safety standards in this context.

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