Chrome-Moly P91 Seamless Pipe for Power Plant Superheaters
Seamless P91 grade (9Cr-1Mo-V) alloy steel pipe, wall ≥4 mm, for superheater tubes in fossil fuel power plants. Fits HTS 7304.90.30.00 as thick-walled seamless alloy steel tube for high-temperature steam service.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If standard carbon steel grade
No Cr/Mo alloying moves to carbon boiler tubes.
If as boiler sub-assembly
Pre-fitted into boiler sections classifies as parts.
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
• Normalize/temper certs mandatory for P91; improper heat treat voids specs
• Exact OD/ID measurements for wall thickness verification
• Distinguish from P92; composition affects alloy confirmation
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