What test is used to check the tightness of fuel gas systems?

In the context of checking the tightness of fuel gas systems, the pressure test is the appropriate method. This test involves applying a specific pressure to the gas system and monitoring it over a designated period. If the pressure remains stable, it indicates that there are no leaks within the system, confirming its integrity and tightness.

The application of a pressure test is essential in ensuring safety; it allows inspectors to detect even the smallest leaks before the system is put into operation. This is particularly important because gas leaks can lead to hazardous situations, including explosions or toxic exposures.

While other tests exist, such as the leak test, which often involves using a solution to identify leaks, the pressure test is a more comprehensive method specifically designed to ascertain the overall tightness of the system over a broader range of potential failure points. This is why it is considered the standard practice for validating the integrity of fuel gas installations.