When leak testing a low-pressure refrigeration system with nitrogen, what pressure limit should not be exceeded to avoid damage?

In low-pressure refrigeration systems, maintaining pressure limits during leak testing is crucial to avoid potential damage to system components. The correct pressure limit to avoid damage when using nitrogen for leak testing is 10 psig. Testing above this limit can risk damaging sensitive components, such as gaskets and seals, or potentially causing the structure of the system to fail.

Low-pressure systems are specifically designed to operate at much lower pressures compared to high-pressure systems, and exceeding 10 psig during leak testing can result in excessive stress on the system. This guideline helps ensure that the integrity of the system is preserved while effectively checking for leaks. Testing at appropriate pressures is critical for both safety and the long-term reliability of the refrigeration system.