Precision Seamless Steel Instrument Tubing
High-precision seamless tubes of nonalloy steel with wall thickness under 4 mm, used for instrumentation and control lines in industrial applications. Fits HTS 7304.90.50.00 for seamless, thin-walled iron/nonalloy steel pipes.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If alloy steel construction
Alloy variants classify under 7304.19 or 7304.59 for other seamless alloy tubes.
If imported as integral part of instruments
Tubes specifically shaped for measuring instruments fall under Chapter 90.
If electrically welded
Welded construction, even precision, shifts to welded pipe headings in 7306.
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
• Include tolerances and surface finish specs in documentation to support precision classification
• Confirm no internal threading, as threaded pipes may go to 7306.40
• Test for alloying elements to ensure nonalloy status amid supply chain variations
Related Products under HTS 7304.90.50.00
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