904L Stainless Refinery Heater Tube from United States
Seamless 904L (N08904) high nickel stainless steel tubes for convection sections of refinery process heaters, with copper-bearing alloy resisting polythionic acid stress corrosion. These tubes are of circular cross-section and are classified under tariff item 7304.49.00 as other seamless stainless steel tubes.
Duty Rate — United States → Canada
50%
Rate breakdown
26SUR5050%United States Surtax Order (2026) — 50% on US products
Import Tips
• Confirm the UNS N08904 alloy composition with a mill certificate
• Ensure the tubes are not classified as parts of heaters under Chapter 84; if they are specifically shaped for a heater, they may be classified elsewhere
• Provide detailed specifications, including length and diameter, to facilitate classification