7304.29.50.15 - Having a wall thickness not exceeding 9.5 mm

This HTS classification covers seamless tubes made of iron or non-alloy steel, specifically designed for use in drilling operations for oil or gas. The critical defining characteristic for this subcategory is that the tubing must have a wall thickness *not exceeding* 9.5 mm. These tubes are integral components in the extraction process, forming part of the infrastructure used to access and retrieve oil and gas reserves.

It is crucial to distinguish this category from its sibling, 7304.29.50.30, which covers tubing with a wall thickness *exceeding* 9.5 mm. The distinction in wall thickness is a primary factor for customs purposes, affecting duty rates and import regulations. Both categories fall under the broader umbrella of casing, tubing, and drill pipe used in oil and gas drilling, and share the characteristic of having an outside diameter not exceeding 114.3 mm.

As a leaf node, this classification does not have further subcategories. Therefore, the classification hinges entirely on meeting the specified criteria: seamless construction, material of iron or non-alloy steel, application in oil and gas drilling, an outside diameter not exceeding 114.3 mm, and most importantly, a wall thickness that does not surpass 9.5 mm. Importers must ensure accurate measurement of the wall thickness to ensure correct classification.