SMO 254 Seamless Superheater Tube
Seamless SMO 254 (6Mo) super austenitic stainless tube for superheaters in biomass boilers, with exceptional chloride pitting resistance. Circular cross-section for radiant and convection zones. Fits 7304.49.0045 for superheater end-use and premium stainless steel grade.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If welded SMO 254 superheater tubing
Welding process exclusion from seamless 7304 heading moves to 7306.
If <16mm dimension resembling wire"
Chapter wire note may apply to very small diameter 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
• Minimum 6% molybdenum content certification critical for SMO 254 classification
• Specify biomass vs fossil fuel service to guide material selection compliance
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