What is the term for a specialized intermodal tank container used to transport gases in high-pressure cylinders?

The term that specifically refers to a specialized intermodal tank container used to transport gases in high-pressure cylinders is a tube module or tube trailer. These types of containers are designed to safely and efficiently transport compressed gases, including gases such as hydrogen, oxygen, and others, which require robust containment due to their pressure and potential reactivity.

Tube modules are characterized by their ability to handle high pressures and their configuration of several individual cylinders mounted on a frame, allowing for transport via truck, rail, or ship. This design provides flexibility in intermodal transport while ensuring compliance with safety standards.

In contrast, the other terms listed do not accurately describe this specialized container. IM type 5 and IM type 6 refer to specific types of intermodal tanks designated by the International Maritime Organization (IMO) for transporting various materials, with type 5 being for liquefied gases and type 6 designed for liquids, but not as specifically for high-pressure gas cylinders. Hazardous material container is a broader category that encompasses various types of containers used for transporting hazardous materials, including but not limited to tube trailers, but it lacks the specificity needed to correctly answer the question.