What material are DOT containers primarily made of?

DOT containers, which are regulated by the Department of Transportation for the transportation of hazardous materials, are primarily made of steel, aluminum, or composite materials. Steel and aluminum are favored for their durability and strength, which allows them to withstand the high pressures associated with storing liquefied gases such as propane and butane. Composite materials, which combine different substances to create a lightweight yet strong container, are also utilized for specific applications, enhancing portability without sacrificing structural integrity.

Plastic, wood, and glass do not provide the necessary properties required for safely storing and transporting pressurized gas. Plastic may not withstand the high pressure and could degrade over time when exposed to UV light or chemicals. Wood is not suitable for pressurized containers as it lacks the strength and durability required for this purpose. Glass is fragile and presents significant safety hazards when used as a container for pressurized gases. Therefore, the choice of steel, aluminum, or composite materials is essential for ensuring the safety and effectiveness of DOT containers.