Cold-Drawn Boiler Economizer Tube P91 Alloy
Cold-drawn seamless P91 (Grade 91) alloy steel tube for boiler economizers, enhancing fuel efficiency through preheating. Known for creep strength in 9Cr-1Mo-V composition. Under 7304.51.50.45 for boiler applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If certain other alloy grades like P5/P9
Statistical suffixes differentiate specific alloy chemistries within the heading.
If hot-formed economizer tubes
Manufacturing process (cold vs hot) dictates subheading placement.
If as integral economizer components
When pre-assembled for boilers, classifies as parts of heating equipment.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Require Q&T (quench & temper) certification specific to P91 processing requirements
• Monitor for special processing rules on high-chrome alloys at customs
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