Which of the following is NOT a feature of intermodal tanks?

• A. Carry refrigerated liquids
• B. Heavy insulation
• C. Pressure ratings up to 300 psi
• D. They are always fully autonomous with no maintenance

Answer: (D)

Intermodal tanks are standardized, multi‑modal vessels designed to move liquids (and some pressurized contents) safely across ships, trucks, and trains. They can carry refrigerated liquids in specialized “reefers,” and many units include heavy insulation to minimize heat transfer during transit. The vessels are built with specific pressure ratings to match the cargo they are designed to hold, which can mean relatively high design pressures for certain contents.

What these tanks are not is maintenance-free or autonomous. They require regular inspections, hydrostatic or pneumatic tests, leakage checks, and routine maintenance to ensure the vessel integrity, insulation performance, and valve seals remain sound. Without ongoing upkeep, the safety and reliability of the container cannot be guaranteed, which is why maintenance is a fundamental part of using intermodal tanks.