Seamless Alloy Steel Heat Exchanger Tube
Thick-walled seamless alloy tubes, 181 mm OD and 23 mm wall, for shell-and-tube heat exchangers in refineries. Classified 7304.59.80.40: seamless, alloy, circular, correct OD range, wall ≥19 mm.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If austenitic stainless steel
Stainless heat exchanger tubes classify under specific stainless headings.
If welded construction
Welded thick-walled exchanger tubes move to 7306 other welded category.
If OD exactly 114.3 mm
Borderline smaller diameters have separate statistical suffixes.
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Import Tips & Compliance
• Specify U-bend capability if applicable; straight lengths stay tube classification
• Test for intergranular corrosion resistance typical of heat exchanger service
• Document NACE MR0175 compliance for sour service applications
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