What is the minimum test pressure used to test gas piping?

The minimum test pressure for gas piping is defined as 1.5 times the proposed maximum pressure, ensuring safety and the integrity of the system while not being less than 3 psig. This value is established to adequately test the piping for leaks and to ensure that it can withstand the operational pressures without exceeding acceptable limits.

Using a test pressure that is 1.5 times the proposed maximum provides a safeguard that accounts for potential pressure fluctuations and ensures that any weak points in the piping system will be identified during testing. The stipulation of not being less than 3 psig is an additional measure to ensure that the test is relevant and effective, especially in low-pressure systems where very low test pressures could result in faulty readings or insufficient testing standards.

This approach reflects standard practices in gas piping systems and is designed to minimize risks associated with gas leaks or system failures, promoting safety for both residential and commercial applications.