What is the maximum pressure for air testing a tank before it becomes hazardous?

The maximum pressure for air testing a tank, particularly in the context of underground storage tanks, is established to ensure safety and prevent potential hazards such as explosions or structural failure. Testing at a pressure of up to 5 psig is deemed safe under most regulatory guidelines and industry standards, which aim to balance the need for effective testing against the risks associated with high-pressure scenarios.

At this pressure level, the likelihood of reaching a critically hazardous condition is minimized, as it is still within the parameters that tanks are designed to withstand without compromising their integrity. This level allows for the detection of leaks or weaknesses in the tank structure without introducing excessive risk.

Higher pressure testing can significantly increase the likelihood of failure, resulting in dangerous situations. Therefore, adhering to the maximum of 5 psig provides a guideline that supports both the safety of the personnel conducting the test and the longevity and reliability of the tank itself.