7304.39.00.56 - Having a wall thickness of 19 mm or more

This classification covers seamless tubes, pipes, and hollow profiles made of iron or non-alloy steel that have a circular cross-section and an outside diameter ranging from 190.5 mm to 285.8 mm. Crucially, these items are distinguished by having a wall thickness of 19 mm or more.

This specific category is differentiated from its siblings by its precise wall thickness requirement. It excludes tubes with wall thicknesses less than 12.7 mm (7304.39.00.48) and those with wall thicknesses between 12.7 mm and less than 19 mm (7304.39.00.52). Therefore, the defining characteristic for this classification is a minimum wall thickness of 19 mm within the specified diameter range.

As this is a leaf node, there are no further subcategories under this HTS code. All qualifying seamless iron or non-alloy steel tubes and pipes meeting the diameter and wall thickness criteria will be classified here. Practical examples of such goods could include heavy-duty industrial piping used in oil and gas infrastructure, large-diameter structural tubing, or components for high-pressure systems where robust wall thickness is essential for structural integrity and safety.