How should the lines and fittings of an oxygen system be tested for leaks?

The method of bubble testing with a special soap solution is the preferred approach for detecting leaks in an oxygen system. This technique involves applying a soapy solution to the joints, lines, and fittings of the oxygen system. When air escapes from any leaks, it will create bubbles in the soapy solution, thereby indicating the presence of a leak. This method is effective as it allows for the direct observation of leaks, ensuring that any compromise in the system is identified accurately.

Other testing methods have limitations; for instance, using a pressure gauge may indicate loss of pressure but does not pinpoint the exact location of a leak. A vacuum leak test can be effective but is typically more complex and may not be practical in all situations. Observing for visible damage can help assess the overall condition of the system but is not a reliable method for identifying small leaks that may not be visible to the naked eye. Therefore, the bubble test is a straightforward, efficient, and reliable method to ensure the integrity of an oxygen system's lines and fittings.