Which method is used for detecting gas leaks according to National Fuel Gas Code?

The method utilized for detecting gas leaks according to the National Fuel Gas Code is the use of noncorrosive leak detection fluid. This approach is specifically designed for the purpose of identifying leaks in gas pipes and connections. The fluid typically forms bubbles when it comes into contact with escaping gas, thus providing a clear visual indication of a leak.

Using noncorrosive leak detection fluid is favored because it is safe for use with the materials typically found in gas piping systems, ensuring that no harmful reactions occur while also being sensitive enough to detect small leaks effectively. This makes it a preferred option for professionals who need to ensure safety and compliance with regulations when inspecting gas appliances and systems.

Other methods, such as visual inspection or the use of mechanical gauges, may not provide as reliable or definitive evidence of gas leaks compared to leak detection fluids. Electrical testers are generally not appropriate for gas leak detection, as they focus on electrical systems rather than gas line integrity.