What is the appropriate air pressure range for pressure testing single-walled tanks?

The appropriate air pressure range for pressure testing single-walled tanks falls within the 3 to 5 psig range. This pressure level is considered ideal for effectively detecting leaks while ensuring the structural integrity of the tank is not compromised during the testing process.

Pressure testing is a critical procedure in the maintenance and installation of underground storage tanks, as it helps to identify any potential weaknesses or areas where leaks might occur. If the pressure is set too low, it may not effectively reveal small leaks. Conversely, if set too high, it can risk damaging the tank and might lead to inaccurate test results due to overstressing the tank's material. The 3 to 5 psig range strikes a balance, allowing for a reliable assessment of the tank's condition. This practice is widely accepted and aligns with industry standards for safe and effective testing practices.