Cryogenic liquid tanks have pressures of

Cryogenic liquid tanks have pressures of

• A. 15 psi or greater
• B. 5 psi or greater
• C. 0 psi
• D. Less than 15 psi

Answer: (D)

Cryogenic liquid tanks are designed to be low-pressure vessels because the liquids are kept at extremely low temperatures. At their boiling point, the vapor pressure inside the tank remains modest, and any tendency to vaporize is controlled by venting rather than building up high pressure. That’s why these tanks are operated with service pressures well under 15 psi, with relief devices set to release gas before pressure climbs. This low-pressure design helps maintain the cryogenic temperatures and keeps the system safe.

Cryogenic liquid tanks are designed to be low-pressure vessels because the liquids are kept at extremely low temperatures. At their boiling point, the vapor pressure inside the tank remains modest, and any tendency to vaporize is controlled by venting rather than building up high pressure. That’s why these tanks are operated with service pressures well under 15 psi, with relief devices set to release gas before pressure climbs. This low-pressure design helps maintain the cryogenic temperatures and keeps the system safe.