Alloy Steel Instrument Tubing
Precision seamless alloy steel tubing (e.g., 316L stainless alloy equivalent), wall <1 mm, for pressure/temperature instruments. Under 7304.90.70.00 for thin-wall seamless alloy profiles. Used in gauges, sensors, and control systems.
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 carbon steel instrument tubes
Carbon variants use 7304.41; alloy composition determines heading.
If imported as complete instrument components
Tubes pre-fitted into instruments classify under instruments of 9026.
If threaded or coupled ends
Tube fittings with connections shift to 7307 fittings classification.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Specify 'not for pressure piping' to avoid higher-rated line pipe categories
• Cleanliness certification needed for instrument use; contamination voids classification
• Micro-wall thicknesses require precise measurement protocols in documentation
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