Carbon Steel Heat Exchanger U-Tube OD 22mm
Bent seamless carbon steel U-tube with 22mm OD for shell-and-tube heat exchangers in refining and chemical processing. HTS 7304.39.0002 covers its non-alloy seamless circular profile and heat exchanger suitability, despite U-bend, as bending doesn't alter base tube classification. High fatigue resistance for thermal cycling.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If threaded or suited for other uses
Non-boiler seamless tubes with special features like threads go to 7307.
If having OD 38.1mm to 114.3mm
Statistical break within 7304.39 based on precise OD measurement.
If imported assembled in heat exchanger
Complete heat exchanger units classify as machinery, not tube material.
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Import Tips & Compliance
• Document U-bend radius and tube sheet compatibility to affirm heat exchanger end use
• Require NDT (non-destructive testing) reports for seamless quality assurance at import
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