Seamless 16-inch Alloy Steel Structural Hollow Section
Large-diameter seamless hollow profile from manganese alloy steel used in offshore platform construction. Measuring 406 mm OD with 24 mm wall thickness, it fits HTS 7304.59.80.70 for seamless alloy steel tubes of circular section in the designated size range.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If carbon steel composition
Non-alloy steel versions of identical dimensions fall under 7304.29 carbon steel seamless tubes.
If welded construction
Welded structural hollow sections, even large/thick-walled, classify under welded pipe headings 7306.
If imported as finished tubular structures
Assembled or fabricated into structural components, it becomes 'other structures' under 7308.
Not sure which classification is right?
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Import Tips & Compliance
• Structural use may qualify for duty drawback programs—retain engineering drawings showing end application
• Confirm circular cross-section uniformity; non-circular profiles may shift to other 7304 subheadings
• Avoid bulk packaging mislabeled as 'bars' which could lead to Chapter 72 classification errors
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