When should a medical gas system be evacuated?

Evacuating a medical gas system is essential to ensure the safety and integrity of the system, particularly before any significant interventions. Specifically, evacuation is necessary before major repairs, alterations, or emergencies because it allows for the safe removal of any residual gases, thereby reducing the risk of fire, explosions, or contamination when working on the system. This step is crucial for maintaining compliance with safety regulations and ensuring that any modifications or repairs are conducted safely.

Routine operations do not typically require evacuation; the system should be operational and functioning as intended during normal use. While maintaining the system regularly is important, evacuating simply as a matter of routine or during low gas conditions does not address the significant risks associated with repairs or alterations. Performing an evacuation on an annual basis may not be sufficient to address immediate risks posed during maintenances, such as during unexpected emergencies or substantial changes in the system's configuration, where the integrity of the gas system could be compromised.