What is the key difference between a "tank car" and "bulk packaging" in HAZMAT transport?

A tank car is specifically designed to transport liquid hazardous materials, which distinguishes it from other types of packaging used in HAZMAT transport. Tank cars have a cylindrical body that allows for the safe containment and transportation of liquids, ensuring that they can handle the pressure and potential hazards associated with the materials they carry.

In the context of hazardous materials, bulk packaging generally refers to containers that hold quantities of materials in larger volumes but does not imply that they are specifically designed for liquids, as tank cars are. Instead, bulk packaging encompasses a wider range of container types, including drums and boxes, which could contain solids, liquids, or powders, depending on the design and regulations that apply.

The focus on the design and usage of tank cars for liquids is crucial for understanding HAZMAT regulations and ensuring safety during transport. Understanding this distinction helps ensure compliance with safety standards and the proper handling of hazardous cargo.