904L Stainless Refinery Heater Tube
Seamless 904L (N08904) high nickel stainless tube for convection sections of refinery process heaters. Copper-bearing alloy resists polythionic acid stress corrosion. 7304.49.0045 for refining furnace suitability.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If considered hollow drill bars
Heavy wall ratios may classify as bars not tubes.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Copper content verification (>1.0%) critical for 904L PCC resistance
• Heater zone location (radiation vs convection) affects material choice docs
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