7304.29.10.20 - Having a wall thickness of 12.7 mm or more

This HTS classification, 7304.29.10.20, specifically covers seamless tubes and pipes, and hollow profiles made of iron or non-alloy steel, designed for use in oil and gas drilling operations. Within the broader category of casing, tubing, and drill pipe, this subcategory is defined by its specific physical characteristics when it is of the "other" type and made of iron or non-alloy steel, and is threaded or coupled with an outside diameter less than 215.9 mm.

The key differentiator for this particular classification is the wall thickness. It is strictly defined as having a wall thickness of 12.7 mm or more. This distinguishes it from its sibling category, 7304.29.10.10, which covers identical products but with a wall thickness less than 12.7 mm. Both are used in drilling, but this classification targets those with substantially thicker walls, suggesting applications requiring greater structural integrity or resistance to pressure.

As this is a leaf node in the HTS classification system, there are no further subcategories. Therefore, classification within this code is determined solely by meeting all the preceding criteria: being seamless pipe for oil and gas drilling, classified as "other" casing, of iron or non-alloy steel, threaded or coupled, having an outside diameter less than 215.9 mm, and importantly, possessing a wall thickness of 12.7 mm or greater.