What mediums can be used for testing gas piping systems?

In the context of testing gas piping systems, the correct choice highlights the use of mediums that are safe and effective for leak detection and pressure testing. Air, Nitrogen, and Carbon Dioxide are commonly utilized because they can help confirm the integrity of gas piping without posing significant risks of combustion or adverse reactions that could occur with other substances.

Air is widely available and inexpensive, making it a practical choice for many testing scenarios. Nitrogen, being an inert gas, is also ideal as it does not react with other substances, ensuring safety during the test. Carbon Dioxide can be used in specific applications, particularly where it can validate system integrity, as it is also non-flammable.

Other options may contain substances that are either reactive or not recommended for this type of testing, and therefore, cannot be considered suitable mediums for safely testing gas piping systems. The importance of using appropriate testing mediums lies in ensuring no potential hazards are introduced during the testing process, which is critical in maintaining safe gas operations.