What is the maximum test pressure allowed for 12-foot diameter tanks?

The maximum test pressure allowed for 12-foot diameter tanks is 3 psi. This value is established to ensure the integrity and safety of the tank during pressure testing, as higher pressures can lead to structural failures or leaks. Utilizing a test pressure of 3 psi allows for thorough testing of the tank's seals and structural integrity without exceeding safe operational parameters. This limit assists in identifying potential weak points within the tank before it is put into service or after repairs, mitigating the risk of leaks or environmental contamination.