Alloy Steel Capillary Tubing for Instrumentation
Small-diameter seamless alloy steel tubes (OD <38.1 mm) used in pressure gauges and sensors for industrial instrumentation. Falls under HTS 7304.59.80.10 as seamless, circular cross-section hollow profiles of other alloy steel with specified small diameter.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If cold-drawn and of stainless steel
Cold-drawn stainless capillary tubes have dedicated subheadings, separating them from other alloy steel.
If imported as integral parts of pumps
If specifically shaped and imported as pump parts, classification moves to machinery parts rather than raw tubes.
If threaded or fitted with connectors
Tubes with mechanical fittings become tube or pipe fittings under 7307.
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Import Tips & Compliance
• Verify seamless status with ultrasonic testing reports; label with exact alloy grade (e.g
• 4130) for Customs; avoid bulk packaging that might suggest unfinished parts
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