7305.20.60.00 - Threaded or coupled

This HTS category, 7305.20.60.00, specifically covers other tubes and pipes of iron or steel that are threaded or coupled, have circular cross-sections with an external diameter exceeding 406.4 mm, and are of a kind used in drilling for oil or gas, made from alloy steel. The defining characteristic here is the presence of threaded or coupled ends, which are designed for connecting sections of pipe, as opposed to being simply welded or otherwise closed. These are typically heavy-duty pipes crucial for the structural integrity and operational efficiency of oil and gas extraction processes.

Distinguishing this category from its sibling, 7305.20.80.00 ("Other"), is the explicit mention of "Threaded or coupled" ends. While both fall under alloy steel casing for oil and gas drilling with large diameters, the sibling category would encompass similar pipes that are *not* threaded or coupled, perhaps utilizing different joining methods or serving a slightly varied but related purpose within the same industry. The "threaded or coupled" attribute is the primary differentiator for classification under 7305.20.60.00.

As this is a leaf node within the HTS, there are no further subcategories to introduce. The classification ends at this level, meaning all goods meeting the described criteria – alloy steel, large diameter circular cross-section pipes for oil/gas drilling, with threaded or coupled ends – are classified directly under 7305.20.60.00. Practical classification relies on verifying the material composition (alloy steel), the pipe's dimensions and cross-sectional shape, its intended use in oil and gas drilling operations, and most importantly, the presence of threaded or coupled ends for assembly.