What is the maximum operating pressure allowed in a building for gas systems?

The maximum operating pressure allowed in a building for gas systems is generally recognized as 5 psi. This standard is put in place largely for safety reasons, as higher pressures could pose significant dangers, including the increased risk of gas leaks and explosions. In residential and light commercial settings, gas systems typically operate at low pressures, and 5 psi is sufficient for most applications within these environments.

This pressure limit ensures that the materials and fittings used in the gas systems can handle the pressure without the risk of failure or leakage. Compliance with this standard is crucial for the safety of occupants and the integrity of the gas system, as exceeding the allowed pressure can complicate the system's operation and maintenance. It's also aligned with the National Fuel Gas Code and other relevant safety regulations, which emphasize the importance of maintaining safe pressures for gas appliances and pipes within buildings.