7306.19.10 - Of iron or nonalloy steel

This HTS category, 7306.19.10, covers line pipe made of iron or nonalloy steel that is specifically designed and used for oil and gas pipelines. These are typically welded or otherwise formed pipes, excluding seamless types, and are distinguished by their material composition, which is exclusively iron or nonalloy steel.

The key differentiator for this specific classification lies in its material. At the same level, sibling category 7306.19.51 covers identical types of line pipe but is made from alloy steel. Therefore, the classification hinges on whether the steel contains specific alloying elements that elevate it beyond the definition of nonalloy steel.

Further subdivisions exist within this category to provide more granular classification based on physical dimensions. The subcategories, 7306.19.10.10 and 7306.19.10.50, differentiate line pipe based on whether their outside diameter does not exceed 114.3 mm or exceeds this measurement, respectively. This distinction is important for tariff and regulatory purposes related to pipe sizing.