What is the primary cargo that non-pressure cargo carries?

The primary cargo that non-pressure cargo transports typically consists of petroleum products. Non-pressure cargo vessels and containers are designed to carry goods that do not require pressure to maintain their state, such as liquids that are kept at atmospheric pressure. Petroleum products, including fuels and oils, fall into this category because they are often moved in large quantities and do not necessitate pressurized containment to prevent evaporation or keep them in a liquid state. Understanding this is essential for safe handling and transportation, as the properties of the cargo dictate the methods of storage, loading, and safety measures that must be implemented during transport.

In contrast, hazardous materials can be transported in various types of containers, which may include both pressure and non-pressure systems, depending on their specific requirements. Medical supplies and food and beverages, while they can be significant cargo types, typically do not define the non-pressure category as their transport often requires different consideration compared to petroleum products.