What pressure should gas piping be tested to ensure safety?

Testing gas piping to ensure safety is a critical step in ensuring that systems are leak-free and operate effectively. The standard procedure typically requires testing the piping at a pressure that is 1-1/2 times the proposed working pressure of the gas system. This method allows for a margin of safety because it simulates conditions that the piping may experience under operational scenarios that can include fluctuations in pressure.

By testing at this higher pressure level, any weak points or leaks in the piping are more likely to be identified during the testing phase, thereby reducing the risk of potential hazards once the system becomes operational. This protocol aligns with safety standards and regulations typically established for gas installations, as it ensures that the materials and connections can withstand more than just regular operational conditions.

In contrast, testing at a pressure such as 25 PSIG or 5 PSIG may not adequately ensure the integrity of the system, as it is not sufficient to expose potential vulnerabilities in the piping. Similarly, testing at the maximum working pressure doesn't provide a safety buffer that is necessary for detecting leaks and weak points that might be present.