In a propane gas system exceeding 5 PSIG, what should the line relief valve be set to?

In a propane gas system that operates at pressures exceeding 5 PSIG, the appropriate setting for the line relief valve is critical for safety and compliance with regulations. The relief valve should be set to a pressure that is 1.5 to 2 times the normal operating pressure of the system.

By setting the relief valve within this range, it ensures that the system can safely handle pressure fluctuations without risking a rupture or a failure that could lead to dangerous situations. If the relief valve is set too close to the normal operating pressure, it may not activate in time to prevent pressure from exceeding safe levels. Conversely, setting the relief valve too high could delay the relief, putting the entire system at risk.

This practice aligns with industry standards and safety protocols, which aim to maintain system integrity and protect against overpressure conditions. Thus, a setting of 1.5 to 2 times the normal pressure allows for sufficient safety margins while still being effective in protecting the propane system from excess pressure scenarios.