What is the proper test pressure and duration for a gas piping system with a 150' longest measured run with a system supply pressure of 7" water column?

For a gas piping system with a longest measured run of 150 feet and a supply pressure of 7 inches of water column, the appropriate testing parameters align with industry practices and safety standards. The test pressure is typically set at a level significantly higher than the operational pressure to ensure the integrity of the piping system.

In this scenario, using a test pressure of 10 psi for a duration of 10 minutes is in accordance with standardized testing requirements, which often specify that the test pressure should be at least 1.5 times the maximum operating pressure, and the duration helps ensure that any potential leaks can be detected effectively. The combination of pressure and time allows for sufficient evaluation of the system's tightness, ensuring that any leaks will be discovered within the testing timeframe.

Thus, the choice of 10 psi for a duration of 10 minutes is the most appropriate for a system operating at a lower pressure, providing a reliable means of verifying the safety and functionality of the gas piping.