What method is recommended for testing suspected leaks in piping equipment?

Using soapy water to test for suspected leaks in piping equipment is a widely accepted and effective method. When applied to the surface of the pipes, the soapy solution forms bubbles at the site of any leaks. This provides a visual indication of where gas is escaping, allowing for easy identification of the problem area. The method is particularly favored because it is safe, non-toxic, and straightforward, making it suitable for both large and small leaks.

Compressed air, although it can be used for some testing scenarios, often poses risks, especially if the pressure is too high or if there are already vulnerabilities in the piping. Heat application can be harmful and is not a reliable method for detecting gas leaks, as it might inadvertently worsen the situation by spreading a potential fire hazard. Gas detection sensors are more sophisticated but can be more costly and may not always be necessary for basic leak tests. Overall, the simplicity and effectiveness of using soapy water make it the recommended method for leak detection in piping equipment.