Which test is utilized to check the tightness of fuel gas systems?

The test utilized to check the tightness of fuel gas systems is the pressure test. This test involves pressurizing the gas piping system to a specified pressure and monitoring the pressure over a set period of time. If the pressure remains constant, it indicates that there are no leaks in the system, thus confirming its integrity and safety for operation.

Pressure tests are particularly critical for ensuring that gas piping systems do not leak, as leaks can lead to dangerous situations, including explosions or fires. The method typically follows standardized codes and regulations that dictate the appropriate pressure levels and duration for the test to ensure thorough and reliable results.

While other tests mentioned have their specific applications, they do not serve the primary function of confirming the tightness of gas systems in the same way that the pressure test does. The integrity test and leak test could imply different methodologies or specific scenarios, while the safety test may encompass a broader range of considerations beyond simply checking for leaks.