7304.29.61.75 - Having an outside diameter exceeding 406.4 mm

This HTS category, 7304.29.61.75, specifically covers seamless tubes and pipes made from iron or steel, categorized as "other alloy steel," which are designed for use in drilling for oil or gas. The defining characteristic of this classification is that these oil and gas well casing, tubing, and drill pipe have an outside diameter exceeding 406.4 mm. This specification is crucial for distinguishing these larger diameter pipes from those intended for less demanding applications or those with smaller dimensions within the oil and gas drilling context.

This category is distinguished from its sibling categories by its specific size criterion. Unlike tubes with diameters not exceeding 114.3 mm, or those falling within the ranges of exceeding 114.3 mm but less than 215.9 mm, and those from 215.9 mm up to and including 406.4 mm, this classification exclusively applies to tubing and pipes with an outside diameter strictly greater than 406.4 mm. This size distinction is fundamental for trade and customs purposes, often correlating with different manufacturing processes, material requirements, and end-use applications in the oil and gas extraction industry.

As this is a leaf node within the HTS structure, there are no further subcategories for this specific classification. Therefore, classification within 7304.29.61.75 is final based on the material being of other alloy steel, its intended use in oil and gas drilling, and its outside diameter exceeding 406.4 mm. Importers and exporters should ensure that all these criteria are met to correctly apply this code.