347H Stainless Refining Furnace Tube
Niobium-stabilized 347H welded stainless tubes for high-temperature refining furnace convection sections, thick-walled construction. Creep and corrosion resistant. HTS 7306.40.50.15 for refining furnace applications.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If wire-derived hollow bars
Hollow products from Chapter Note 'wire' use 7228 headings.
If seamless stabilized furnace tubes
Seamless high-temperature tubes remain in 7304 stainless seamless.
If complete furnace combustion chambers
Assembled furnace units classify under complete industrial furnaces.
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Import Tips & Compliance
• Certify stabilization elements (Nb+Ta) content for high-temperature grade
• Include furnace zone operating profiles in end-use documentation
• Verify against exclusion process for Section 232 steel tariffs
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