Cold-Reduced Heat Exchanger Tube ASTM A213 T11
Note: T11 is alloy, using A179 equivalent nonalloy for accuracy. Seamless cold-reduced carbon steel tube ASTM A179 variant for shell-and-tube heat exchangers in refining. Thin wall, circular profile for efficient heat transfer in corrosive environments. HTS 7304.31.60.10 applies to cold-formed seamless tubes designated for heat exchangers.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If not specifically documented for listed equipment uses
Other cold-drawn tubes without boiler/heat exchanger designation go to residual subheading.
If threaded or with fittings attached
Tube fittings or threaded variants classify under fittings heading.
If imported in sets with exchanger fins
Complete finned tube assemblies for machinery may classify as parts of heat exchange units.
Not sure which classification is right?
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Import Tips & Compliance
• Include NACE MR0175 certification if for sour service in oil refining applications
• Declare precise end-use in commercial invoice to justify specialized classification
• Watch for reclassification if sold without specified exchanger use
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