What method is commonly used to locate leaks in fuel gas piping?

The method of using a soap bubble solution is commonly employed for locating leaks in fuel gas piping due to its effectiveness and simplicity. When applied to joints and fittings where gas may be escaping, the soap solution will form bubbles that indicate the escaping gas. This visual cue makes it easy for investigators or technicians to identify the exact location of the leak, thereby allowing for prompt and targeted repairs.

While other methods like thermal imaging or infrared sensors can detect temperature changes that may suggest a leak, they do not provide a direct indication of the leak's location. Ultrasonic testing is useful for identifying the presence of leaks based on sound waves but also lacks the straightforward visibility provided by the soap bubble method. In contrast, the soap bubble solution is both cost-effective and easy to use, making it the preferred first choice for identifying gas leaks.