Fittings for positive pressure medical gas systems shall be cleaned for oxygen service by which entities in accordance with CGA G-4.1?

• A. all of the above
• B. the manufacturer
• C. a supplier
• D. a third party agency other than the manufacturer

Answer: (A)

The concept being tested is that oxygen-service fittings can be cleaned by multiple qualified parties under CGA G-4.1. Oxygen cleanliness is critical because even small amounts of oil, grease, or particulates can ignite in the presence of high-pressure oxygen, so any cleaning must be done to validated procedures that remove these contaminants. CGA G-4.1 provides acceptable methods and recognizes that the cleaning work may be performed by the original manufacturer, by a supplier, or by a third-party agency, as long as the procedures and documentation meet the standard. This flexibility exists to ensure fittings can be cleaned by the entity most capable of ensuring proper cleaning and traceability, without compromising safety.