7304.19.50.50 - Having an outside diameter exceeding 114.3 mm but not exceeding 406.4 mm

This HTS category, 7304.19.50.50, specifically classifies seamless line pipe made of iron or steel, intended for use in oil or gas pipelines, where the outside diameter falls within a precise range. The key defining characteristic for this classification is an outside diameter that exceeds 114.3 mm but does not exceed 406.4 mm. These pipes are engineered to meet the rigorous standards required for the transportation of hydrocarbons, ensuring reliability and safety in demanding operational environments.

To distinguish this category from its siblings, consider the diameter specifications. HTS code 7304.19.50.20 covers similar line pipe with an outside diameter not exceeding 114.3 mm, representing smaller diameter pipes. Conversely, 7304.19.50.80 encompasses line pipe with an outside diameter exceeding 406.4 mm, which are larger bore pipes. Therefore, this particular category occupies the mid-range diameter segment for seamless line pipe used in oil and gas applications.

As a leaf node, this category has no further subcategories. Classification is determined solely by the material (other alloy steel), construction (seamless), application (line pipe for oil or gas pipelines), and the specified outer diameter range. Importers and exporters should carefully measure and confirm the outside diameter of their goods to ensure accurate classification under this specific HTS code.