Refinery Furnace Seamless Tube ASTM A106
Cold-rolled Grade B seamless carbon steel tube per ASTM A106 for process furnace tubes in petroleum refining, handling high temperatures up to 800°F. Circular profile with controlled chemistry for carburization resistance. 7304.31.60.10 due to cold-reduction and refinery 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 external diameter of 114.3 mm or less, other specs
Narrower size specs take different statistical breakout in cold-drawn category.
If not cold-formed, hot-finished only
Hot-finished seamless tubes in refinery use stay in 7304 but different subheading.
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
• Provide API 5L or equivalent traceability documentation for refinery applications
• Specify minimum tensile strength in import docs to match statistical requirements
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