7306.50.50.70 - With an outside diameter exceeding 114.3 mm but not exceeding 406.4 mm

This HTS category, 7306.50.50.70, pertains to welded tubes, pipes, and hollow profiles of iron or steel that are of circular cross-section and manufactured from other alloy steel. Specifically, these items must have an outside diameter greater than 114.3 mm but not exceeding 406.4 mm. The material is characterized as "other alloy steel," distinguishing it from carbon steel or specific types of alloy steels that might fall under different subheadings.

The key differentiator for this classification, compared to its sibling category 7306.50.50.50, lies in the specified outside diameter. While both are welded, circular, and made of other alloy steel with a wall thickness of 1.65 mm or more, this category exclusively covers products with an outside diameter that falls within the range of exceeding 114.3 mm up to and including 406.4 mm. The sibling category encompasses those with an outside diameter not exceeding 114.3 mm.

As this is a leaf node in the HTS classification, there are no further subcategories. Classification into this specific code hinges entirely on the precise physical dimensions (outside diameter) and the material composition (other alloy steel) when meeting the prior criteria of being welded, circular, and having a wall thickness of 1.65 mm or more. Examples of goods falling here might include large diameter, welded alloy steel pipes used in industrial construction, oil and gas transportation, or specialized machinery where the specific alloy properties and dimensions are critical.