Which DOT specification uses an oval egg-shaped tank?

Which DOT specification uses an oval egg-shaped tank?

• A. DOT 406
• B. DOT 407
• C. DOT 412
• D. MC338

Answer: (A)

Tank shape and pressure rating define the DOT specification for highway cargo tanks. A tank built for gasoline transport under the DOT 406 designation uses an oval egg-shaped end design, meaning the ends are rounded rather than flat and are more ellipsoidal. This shape helps distribute stress along the shell in a non-pressurized, liquid-only tanker and also aids drainage and cleaning of volatile fuels. Other specifications are used for different cargos and pressures, and their tanks have different end geometries and construction features, so they don’t feature the distinctive oval egg shape associated with the gasoline tank design. That oval egg-shaped configuration is the telltale feature of the gasoline DOT 406 tank.

Tank shape and pressure rating define the DOT specification for highway cargo tanks. A tank built for gasoline transport under the DOT 406 designation uses an oval egg-shaped end design, meaning the ends are rounded rather than flat and are more ellipsoidal. This shape helps distribute stress along the shell in a non-pressurized, liquid-only tanker and also aids drainage and cleaning of volatile fuels.

Other specifications are used for different cargos and pressures, and their tanks have different end geometries and construction features, so they don’t feature the distinctive oval egg shape associated with the gasoline tank design. That oval egg-shaped configuration is the telltale feature of the gasoline DOT 406 tank.