7304.19.10.30 - Having an outside diameter exceeding 114.3 mm but less than 215.9 mm

This HTS classification, 7304.19.10.30, pertains to seamless tubes, pipes, and hollow profiles made of iron or non-alloy steel, specifically designated as "line pipe" for use in oil or gas pipelines. The defining characteristic for this subcategory is its outside diameter, which must exceed 114.3 mm (4.5 inches) but remain less than 215.9 mm (8.5 inches). This precise dimensional criterion is crucial for ensuring proper fit and functionality within pipeline systems.

This category is distinct from its sibling classifications primarily based on the specified range of the outside diameter. For instance, it differs from 7304.19.10.20, which covers line pipe with an outside diameter not exceeding 114.3 mm. Conversely, it is differentiated from the subsequent categories which encompass line pipe with outside diameters of 215.9 mm or more. The classification hinges entirely on these precise external measurements, which are critical for procurement, installation, and compatibility within the oil and gas industry.

As this classification represents a leaf node within the HTS structure, there are no further subcategories. This means that any seamless line pipe of iron or non-alloy steel meeting the criteria of being "other" than cast iron, intended for oil or gas pipelines, and possessing an outside diameter between 114.3 mm and 215.9 mm, will be classified directly under this code. Examples of such pipes would include those used for transporting crude oil, natural gas, or refined petroleum products through pipelines where this specific diameter range is required.