What is the minimum test duration for a commercial gas piping system with a volume of 12 cubic feet?

In testing a commercial gas piping system, the minimum test duration is established to ensure that the system can adequately maintain pressure over a specified period. For a commercial gas piping system with a volume of 12 cubic feet, the correct answer of 30 minutes aligns with industry standards that require a thorough evaluation of the system's integrity.

By conducting the pressure test for at least 30 minutes, it allows for the identification of any small leaks that might not be immediately apparent. This duration also provides ample time for monitoring the pressure gauge to see if any decline in pressure occurs, which would indicate a potential issue with the piping.

In contrast, shorter test durations may not be sufficient to reveal minor leaks or pressure inconsistencies, potentially compromising the safety and functionality of the system. Therefore, the 30-minute duration is a balance between thoroughness and practical implementation, ensuring compliance with safety regulations without extending the testing process unnecessarily.