T9 Feedwater Heater Tube OD 35mm
Seamless ASTM A213 T9 alloy steel tube, 35 mm OD, for feedwater heaters in thermal power stations. High chromium content resists oxidation in preheated water systems. 7304.59.20.40 applies to its small diameter and designated heater application.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If with attached flanges or unions
Tube fittings with connectors classify under 7307, not plain tubes.
If semifinished hollow bar stock
Not fully processed for specific end-use; remains Chapter 72 semifinished.
If parts of steam generating boilers
Pre-assembled boiler components shift to Chapter 84 if not plain tubes.
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Import Tips & Compliance
• Conduct 100% PMI testing; customs increasingly verifies alloy composition
• Provide U-bend configuration details if applicable, but straight tubes only here
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