321 Stabilized Stainless Superheater Tube
Titanium-stabilized 321 stainless welded tubes designed for superheater service in fossil fuel boilers, with wall thickness exceeding 1.65 mm. Prevents sensitization during high-temperature exposure. HTS 7306.40.50.15 designation for superheater applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If hollow profiles from wire
Wire-based hollow sections ≤16mm cross-section use Chapter 72 provisions.
If cold-drawn seamless type
Seamless stabilized tubes classify under dedicated 7304 seamless subheadings.
If other steel articles for boilers
Non-tubular superheater components use 7326 other steel articles provisions.
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Import Tips & Compliance
• Include stabilization heat treatment certificates from accredited labs
• Document maximum operating temperature and pressure ratings
• Ensure declaration matches exact statistical dimensions for accurate duty assessment
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