Seamless Alloy Steel Boiler Tube 250mm OD 25mm WT
A seamless tube made from alloy steel with a circular cross-section, outside diameter of 250 mm, and wall thickness of 25 mm, designed for high-pressure boiler applications. It falls under HTS 7304.59.80.55 due to its seamless construction, alloy steel material, specified OD range (190.5-285.8 mm), and thick wall of 19 mm or more. These tubes are critical for heat exchangers in power plants.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If made of other steel rather than alloy steel
Non-alloy steel seamless tubes of similar dimensions fall under 7304.39, changing the heading based on steel type.
If welded or ERW construction
Welded alloy steel pipes shift to Chapter 73 heading 7306, as seamlessness is key for 7304.
If imported as finished boiler parts
If pre-assembled into boiler components, it may classify as machinery parts under Chapter 84 rather than tubes.
Not sure which classification is right?
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Import Tips & Compliance
• Verify alloy steel composition meets Chapter 73 definitions; provide mill test certificates for customs verification
• Ensure seamless manufacturing process documentation to distinguish from welded pipes under 7305/7306
• Measure OD and wall thickness precisely; common pitfall is misclassification due to rounding errors
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Alloy Steel Heat Exchanger Tube 200mm OD 20mm WT
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