API 5ST Stainless Steel OCTG Tubing with Coupling
Welded stainless steel tubing designed for oil and gas drilling operations, featuring a threaded coupling for secure connection to casing strings. Classified under HTS 7306.21.80.10 due to its welded construction, stainless steel material, and importation with integral coupling as specified for OCTG tubing. Meets API 5ST standards for sour service environments in downhole applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If seamless construction instead of welded
Seamless stainless steel OCTG tubing shifts to 7306.21.10.00, as heading differentiates by manufacturing process (seamless vs welded).
If imported without coupling or for non-OCTG use
Tubing lacking couplings or not specifically for oil/gas drilling falls under general stainless steel tubes in 7304, outside OCTG provisions.
If made of other alloy steel, not stainless
Non-stainless alloy steel versions classify under 7306.40, as stainless steel requires chromium content >10.5% per Chapter 73 note.
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Import Tips & Compliance
• Verify API 5ST or 5CT certification documentation to confirm OCTG suitability and avoid reclassification as general pipe
• Include mill test certificates (MTC) showing stainless steel chemistry and welding process to meet 'welded of stainless steel' criteria
• Declare couplings explicitly in entry docs; mismatched or separate import can trigger audits or duty adjustments
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