What is the maximum moisture concentration allowed during the outlet test for the verifier purity?

The maximum moisture concentration allowed during the outlet test for verifier purity is established to ensure the safe operation of medical gas systems. The National Fire Protection Association (NFPA) standards designate a limit of 500 parts per million (ppm) for moisture content in medical gases, which directly impacts the quality and safety of the gases used in healthcare settings.

Maintaining moisture levels at or below this threshold is crucial because excessive moisture can lead to a variety of issues including corrosion of equipment, degradation of gas purity, and potential adverse reactions when gases are used in patient treatments. This standard helps establish a balance where the gases remain effective and safe for medical use, aligning with guidelines that prioritize patient safety and operational reliability.

Understanding these limits is essential for compliance with safety standards and for the effective management of medical gas systems.