Cryogenic liquid storage tanks are characterized by:

• A. Uniform pressure ratings
• B. Diverse in pressure ratings, with some as high as 300 psi and heavily insulated
• C. No insulation
• D. Always at 1 psi

Answer: (B)

Cryogenic liquid storage tanks are designed to minimize heat entering the vessel while handling the vapor produced by keeping the liquid so cold. Because the gases stored and the vessel designs vary, the pressure inside isn’t fixed or uniform across all tanks. Some tanks are built to tolerate higher pressures to manage boil-off gas and the specific liquid’s vapor pressure, with ratings that can reach hundreds of psi. Heavily insulated construction is a defining feature to keep the temperature down and reduce boil-off.

That’s why the best description is that these tanks have diverse pressure ratings, with some as high as 300 psi, and they are heavily insulated. The other options don’t fit because there isn’t a single uniform pressure for all tanks, insulation is essential for cryogenic storage, and they are not limited to a constant 1 psi.