7311.00.00 - Containers for compressed or liquefied gas, of iron or steel

This HTS category encompasses containers specifically designed for the storage and transportation of compressed or liquefied gases, constructed from iron or steel. These include a wide array of vessels such as gas cylinders, tanks, and pressure vessels, irrespective of their specific application, whether for industrial, medical, or other uses. The defining characteristic is their material composition and their engineered capability to withstand the internal pressures associated with compressed or liquefied gases.

Within the broader Section XV and Chapter 73, this classification distinguishes itself by focusing solely on containers for gases. While Chapter 73 covers a vast range of iron and steel articles, this particular code narrows the scope to receptacles explicitly built for pressurized gas containment. It is important to differentiate these from general storage containers or structural iron and steel items that do not possess the specialized design and reinforcement required for gas pressure applications.

The subcategories within 7311.00.00 provide further refinement based on specific regulatory compliance or general categorization. The primary distinction often relates to whether the container has undergone specific safety certifications, particularly those mandated by regulations like title 49 CFR, which are crucial for the safe transport of hazardous materials. The "Other" designation captures those containers that do not fall under specific certification requirements but still meet the general criteria for iron or steel gas containers.