How should the pressure gauge be utilized as per NFPA 54 C.3?

The utilization of the pressure gauge according to NFPA 54 C.3 is focused on observing for drops in pressure after momentarily supplying gas. This approach is critical for ensuring that the gas system is operating correctly and safely. A drop in pressure can indicate potential leaks, blockages, or other issues within the gas line. By monitoring the pressure gauge, technicians can assess the integrity of the gas distribution system and make necessary adjustments or repairs to maintain safety and compliance with regulations.

The emphasis on checking for drops in pressure is crucial in gas systems because any unexpected changes can pose a safety risk. This monitoring helps to ensure that the gas supply is consistent and reliable, which is essential for the safe operation of gas appliances.

While determining gas flow rates, measuring energy consumption, and checking overall system efficiency can be important aspects of managing gas systems, they are not the primary function of the pressure gauge as outlined in that particular section of NFPA 54.