2209 Super Duplex Seamless Pipe 6-inch
Seamless 2209 super duplex stainless pipe, 6-inch NPS, for desalination plants, circular cross section with extreme pitting resistance. HTS 7304.49.00 for other seamless stainless pipes not cold-drawn. PREN >40 for harsh marine use.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If with yield >600 MPa
Super duplex strength typically qualifies for worked high-strength 7304.41.
If classified as non-stainless alloy
If alloy composition debated, may fall to other alloy seamless.
If flanged or with butt-weld fittings
Fittings-attached pipes under 7307.23 stainless category.
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Import Tips & Compliance
• Mill certs must detail PREN value and ferrite content for super duplex verification
• Declare not for oil drilling to stay out of 7304.21 specialized
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