How long must there be no measurable drop in pressure when testing an installed LPG system?

To determine the integrity of an installed LPG system, it is essential to conduct a pressure test. The standard practice requires monitoring the pressure for a specific period to ensure there is no drop, which indicates that there are no leaks present in the system.

The duration of a pressure test is critical; it helps to ensure that any potential leaks are detected within a reasonable timeframe. Testing for a duration of 3 minutes strikes a balance, allowing enough time to confirm system integrity without being excessively lengthy. A drop in pressure during this time would signify a potential issue that needs to be addressed.

Testing durations shorter than this may not provide sufficient time for pressure variations to stabilize or for minor leaks to manifest in measurable pressure drops, leading to false confidence in the system’s integrity. Conversely, longer testing times are unnecessary for typical inspections, as they do not significantly improve detection capabilities beyond the initial 3 minutes. Thus, the requirement of 3 minutes is established as the industry-standard timeframe to verify that the installed LPG system is sound and leak-free.