What is the maximum test pressure allowed for tanks with a diameter between four and ten feet?

The maximum test pressure allowed for tanks with a diameter between four and ten feet is indeed 5 psi. This standard is established to ensure safety during testing while preventing structural failure of the tank. Testing at this pressure level allows for the detection of leaks or weaknesses in the tank without compromising its integrity.

Maintaining a testing pressure within this limit helps to ensure that the tanks can safely handle the pressures they might encounter during normal operations, while also complying with regulatory requirements. Tanks that are subjected to pressures exceeding this threshold may risk deformation or damage, potentially leading to failures that can cause environmental hazards.

Understanding the specifications and allowable pressures for underground storage tanks is crucial for professionals working in this area, as they must adhere to these guidelines to maintain compliance with safety regulations.