7 Inch K55 Casing String with Coupling
7-inch diameter K55 non-alloy steel casing imported as coupled sections for oil well drilling to stabilize boreholes. HTS 7306.29.60.10 applies to this welded tubing with couplings for drilling use. Provides corrosion resistance and structural integrity.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If seamless casing
Seamless manufacturing process reclassifies to 7304 regardless of coupling.
If other hollow profiles
Non-tubular shapes or non-drilling profiles go to other steel articles.
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 running procedures and makeup torque data
• Verify no chrome lining that could imply alloy
• Protect dope coatings during shipping
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