7304.11.00.50 - Having an outside diameter exceeding 114.3 mm but not exceeding 406.4 mm

This HTS category, 7304.11.00.50, specifically classifies seamless tubes and pipes made of stainless steel that are intended for use in oil or gas pipelines. The defining characteristic for this subcategory is their external diameter, which must fall within a precise range: exceeding 114.3 mm but not exceeding 406.4 mm. This diameter specification is crucial for differentiating these line pipes from others within the same broad category.

Distinguishing this category from its siblings, 7304.11.00.20 covers similar line pipes with an outside diameter not exceeding 114.3 mm, which are typically smaller bore. Conversely, 7304.11.00.80 encompasses line pipes with an outside diameter exceeding 406.4 mm, representing significantly larger diameter pipes used for high-volume transport. Therefore, the precise measurement of the outside diameter is the key differentiator at this level of classification.

As a leaf node, this classification does not have further subdivisions. The focus remains on accurately identifying seamless stainless steel line pipe within the specified diameter range for oil and gas applications. Importers and exporters should ensure that the product's material composition (stainless steel), intended use (oil or gas pipeline), and precise external diameter are confirmed to ensure correct classification under this specific HTS code.