Duplex 2205 Stainless Welded Pipe 12-inch
Duplex 2205 (UNS S31803) stainless steel welded pipe, 12-inch (323.9 mm) OD with 6.35 mm wall thickness for offshore oil & gas. Under HTS 7306.40.50.90 as stainless welded circular tube in size range, 'other'. High strength and corrosion resistance defines its stainless steel status.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If seamless duplex stainless
Seamless duplex pipes classify under 7305 for line pipe applications, distinct from welded.
If specific enumerated types like boiler tubes
Certain specialized stainless tubes (boiler, superheater) have dedicated subheadings before 'other'.
If parts of cranes or excavators
Tubular parts specifically for machinery in Chapter 84 take precedence over material-based Chapter 73.
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Import Tips & Compliance
• Duplex grades require chemical analysis certificates proving chromium/nickel/molybdenum content for stainless classification
• Confirm no special processing (e.g
• solution annealing) that might qualify as seamless under 7304
• Monitor quarterly AD/CVD updates for duplex stainless from Italy, Spain, or Korea
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