Which tanker type is described as having a pressure range of 100-500 psi?

The MC-331 tanker is specifically designed for the transportation of pressurized gases, and it operates within a pressure range of 100-500 psi. These tankers are typically constructed with thicker walls and are built to safely transport materials such as propane, butane, and other liquefied gases under pressure, making them crucial for handling and delivering these types of materials safely.

In contrast, the other tanker types mentioned serve different purposes or transport different substances. The MC 306/DOT 406 is primarily used for transporting non-hazardous liquids and operates under lower pressure, while the MC-307/DOT 407 is designed for transporting hazardous liquids but does not operate at the same pressure range. The MC-338, on the other hand, is a cryogenic tanker designed to transport liquefied gases at very low temperatures and different pressures, which does not fall within the 100-500 psi range. Hence, the MC-331 is the only tanker type that fits the specified pressure range of 100-500 psi.