What is an atmospheric tank designed to operate at?

Atmospheric tanks are designed to operate at pressures close to atmospheric pressure, which is typically around 14.7 psi at sea level. When referring to atmospheric pressure in the context of tanks, it generally means that these tanks are not designed to withstand internal pressures significantly above the standard atmospheric level.

Operating at 1.0 psi indicates that the tank is designed to function at a very low pressure that is slightly above atmospheric pressure, but still considered to be within safe limits for pneumatic systems that require minimal pressure. This type of design is particularly important for storage of non-flammable medical gases, as it minimizes the risk of leaks or ruptures that could potentially lead to hazardous situations.

The other pressure options presented are higher than what would be typical for an atmospheric tank, which is not designed to contain elevated pressures like those indicated by 2.0 psi, 3.5 psi, or 5.0 psi. Higher pressures would suggest the tank is categorized under a different standard, usually associated with pressurized vessels that require stricter safety protocols.