Seamless Refined Copper Cryogenic Transfer Lines
Seamless refined copper tubes for liquid nitrogen/helium transfer in cryogenic research facilities. Classified HTS 7411.10.10 as seamless refined copper pipes. Excellent thermal conductivity at low temperatures.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If machined with cryogenic flanges
Finished articles of copper with castings classify under 7419 cast articles.
If parts of cryogenic refrigerators
Cryogenic system parts shift to Chapter 84 refrigeration machinery parts.
If brazed longitudinal joints
Brazed tube construction disqualifies from seamless category.
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Import Tips & Compliance
• Include low-temperature ductility test results; specify insulation separate from tube
• Pitfall: classifying vacuum-insulated assemblies under Chapter 84
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