How much pressure do dry bulk cargo tanks typically operate at?

Dry bulk cargo tanks are specifically designed to transport materials such as chemicals, powders, and granules, and they function primarily under low pressure. These tanks are engineered to handle the weight and pressure created by the bulk materials inside, but they operate in a pressure range that is generally quite low compared to other types of tanks.

The correct answer highlights that these tanks rarely exceed 22 psi. This is significant because exceeding this pressure can risk structural integrity and safe operation. Moreover, maintaining such low pressure is vital for the safe transport of hazardous materials to prevent leaks and ensure the containment of the cargo.

While some pressure may be necessary for discharging the material (such as pneumatic discharge), the operational design of dry bulk cargo tanks focuses on stability and safety at lower pressures, making it crucial for operators to understand these limits. Other pressure ranges mentioned in the options do not accurately reflect the operational standards for dry bulk cargo tanks.