Duplex 2205 Welded Tube 4 Inch OD
Welded tube from duplex 2205 alloy steel featuring 101.6 mm (4 inch) OD and 2.77 mm wall thickness. Meets HTS 7306.50.5050 criteria: welded, circular, alloy steel, thick wall, small OD. Ideal for offshore structural applications requiring corrosion resistance.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified as stainless steel
Duplex grades sometimes argued as stainless, moving to 7306.40 subheadings.
If threaded or coupled, not plain end
Fittings-added tubes shift to Chapter 73 tube fitting headings.
If for oil/gas line pipe use
Certified line pipe classifies under 7304 regardless of material.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Include material grade certification (UNS S32205) to distinguish from stainless steel
• Document welding process (e.g
• ERW) to confirm 'welded' status vs seamless
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