7304.29.61.45 - Having an outside diameter exceeding 114.3 mm but less than 215.9 mm

This HTS classification, 7304.29.61.45, specifically covers seamless tubes and pipes made from iron or steel, excluding cast iron, that are utilized in the drilling industry for oil and gas extraction. The defining characteristic of this category is its outside diameter, which must fall within a precise range: exceeding 114.3 mm but remaining less than 215.9 mm. These are typically considered specialized components for the robust demands of exploration and production activities.

Distinguishing this category from its siblings is crucial for accurate classification. Unlike sibling categories that cover tubing with smaller diameters (not exceeding 114.3 mm) or larger diameters (215.9 mm or more up to 406.4 mm, and exceeding 406.4 mm), this subcategory isolates a mid-range of diameters critical for specific wellbore construction or operational phases. The material composition is further refined to "other alloy steel," differentiating it from plain carbon steel or other specific alloy types that might fall under different subheadings within 7304.29.

As this is a leaf node within the HTS, there are no further subcategories. Therefore, the classification relies solely on the established criteria: being a seamless tube or pipe of iron or steel for oil and gas drilling, made of other alloy steel, and possessing an outside diameter strictly between 114.3 mm and 215.9 mm. Importers and exporters must carefully measure and verify these dimensions to ensure correct entry.