7304.59.20.70 - Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm

This HTS classification, 7304.59.20.70, covers seamless tubes, pipes, and hollow profiles made of iron or steel, specifically of other alloy steel, with a circular cross-section. The defining characteristic of goods within this category is their outside diameter, which must exceed 285.8 mm but not exceed 406.4 mm. These particular dimensions are critical for their intended use in specific industrial applications, such as boiler systems, superheaters, heat exchangers, condensers, refining furnaces, and feedwater heaters.

Distinguishing this category from its siblings relies solely on precise outside diameter measurements. For instance, 7304.59.20.60 covers similar alloy steel tubes with an outside diameter up to 285.8 mm, while 7304.59.20.80 includes those exceeding 406.4 mm. Smaller diameter tubes are classified under different sibling codes such as 7304.59.20.40 and 7304.59.20.45. Therefore, the exact measurement of the external circumference is the primary factor differentiating these closely related classifications.

As this is a leaf node within the HTS database, there are no further subcategories for this specific classification. All items meeting the criteria of being seamless alloy steel tubes or pipes of circular cross-section, with an outside diameter falling between 285.8 mm and 406.4 mm, and suitable for the specified industrial applications, will be classified under 7304.59.20.70. Classification at this level hinges entirely on the physical dimension of the outside diameter in conjunction with the material composition and intended use.