Chrome-Moly P91 Alloy Boiler Tube
High-temperature P91 (9Cr-1Mo) alloy steel tube for supercritical boiler superheaters and reheaters. Classifies in 7306.90.5000 as other alloy steel tubes, excluding line pipe or casing applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If threaded/end fittings attached
Tube/pipe fittings combinations shift to Chapter 73 fittings heading.
If parts of steam turbines/boilers
Boiler-specific end-use classifies as Chapter 84 machinery parts.
If cold-drawn seamless
Precision cold-drawn boiler tubes have dedicated seamless subheadings.
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Import Tips & Compliance
• Mandatory ASME SA335 certification and hydrostatic test reports for pressure vessel code compliance
• Declare exact Cr/Mo percentages to confirm alloy status vs carbon steel
• Watch for Section 232 tariffs on steel derivatives; origin certificates critical
Related Products under HTS 7306.90.50.00
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