What is the minimum pressure and duration for testing fuel gas piping installations?

In the context of fuel gas piping installations, it is critical to ensure that the system is leak-free and safe for operation. The established standard for testing such installations requires a minimum pressure of 10 psi maintained for at least 15 minutes. This stipulation is designed to provide a robust indication that the system can safely contain gas without leaks.

The 10 psi threshold is sufficient to detect minor leaks that might occur in the fittings or joints of the gas piping, while the duration of 15 minutes allows for a thorough observation period to monitor any pressure drop, which would indicate a potential leak. Adhering to this standard is vital for compliance with safety regulations and for the integrity of the gas piping system.

The other options, including lower pressures and durations, do not meet the safety criteria necessary for reliable testing. Testing at lower pressures or shorter times may fail to reveal leaks that could pose significant safety hazards. Thus, the requirement of 10 psi for 15 minutes serves as an essential standard ensuring the overall safety and functionality of fuel gas piping systems.