Alloy Steel Heat Exchanger Tube 15-inch OD
Seamless circular tube of chrome-moly alloy steel, 380 mm OD and 8.5 mm wall thickness, used in shell-and-tube heat exchangers for petrochemical processing. Classified under HTS 7304.59.80.60 for its alloy composition, precise OD range (285.8-406.4 mm), and thin walls suitable for heat transfer efficiency. Corrosion-resistant properties make it ideal for handling hot fluids.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If wall thickness 12.7 mm or greater
Thicker-walled tubes in same OD range move to 7304.51 statistical breakouts.
If not seamless (threaded/otherwise worked)
Post-manufacture threading classifies under 7307 as worked tubes, not base seamless.
If for specialized heat exchanger machinery parts
End-use as integral machine parts may override material-based tube classification.
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Import Tips & Compliance
• Obtain ASTM A335 certification proving alloy grades like P11/P22 to justify 7304.59 classification
• Declare exact OD and wall measurements; exceeding 406.4 mm shifts to different statistical suffix
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