When testing the final connection between new piping and an existing system, the leak detectant must NOT contain which agent?

When testing the final connection between new piping and an existing system, the leak detectant must NOT contain which agent?

• A. Ammonia
• B. Freon
• C. Chlorine
• D. Acetone

Answer: (A)

Testing the final connection between new piping and an existing system relies on a leak-detection method that is safe for both the equipment and the environment, and that won’t leave harmful residues or react with system components. Ammonia-based leak detectants are avoided because ammonia is caustic and can corrode brass and copper fittings and elastomer seals used in medical gas pipelines. If ammonia leaks, it can also create irritating and potentially hazardous vapors for staff and patients, and any residue would be difficult to purge from the gas path. In contrast, leak-test fluids or tracer methods that are inert and easy to clean up are preferred, which is why ammonia must not be included in the detectant.

Testing the final connection between new piping and an existing system relies on a leak-detection method that is safe for both the equipment and the environment, and that won’t leave harmful residues or react with system components. Ammonia-based leak detectants are avoided because ammonia is caustic and can corrode brass and copper fittings and elastomer seals used in medical gas pipelines. If ammonia leaks, it can also create irritating and potentially hazardous vapors for staff and patients, and any residue would be difficult to purge from the gas path. In contrast, leak-test fluids or tracer methods that are inert and easy to clean up are preferred, which is why ammonia must not be included in the detectant.