API 5CT L-80 13-3/8 inch Stainless Steel Oil Well Casing
Seamless stainless steel casing pipe with 13-3/8 inch OD and 12.7 mm or thicker wall, certified to API 5CT L-80 grade for oil and gas drilling. Used to line and stabilize wellbores in corrosive environments. Falls under HTS 7304.24.40.60 due to seamless stainless steel construction, specific OD range (285.8-406.4 mm), and heavy wall thickness.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If made of carbon or alloy steel rather than stainless
Non-stainless steel casing moves to subheading 7304.29 while maintaining same OD and wall thickness specs.
If outside diameter exceeds 406.4 mm
Larger OD casing classified in 7304.24.30 series despite matching wall thickness and stainless steel material.
If imported as unfinished threading or coupling components
Incomplete casings without final threading treated as 'other tubes' rather than finished drill casing.
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
• Obtain API 5CT Monogram License and mill test certificates (MTC) verifying chemical composition and mechanical properties
• Provide ITP (Inspection and Test Plan) documentation; third-party inspection by bodies like Lloyd's Register is standard
• Confirm exact OD measurement (13-3/8" = 339.7mm) falls within 285.8-406.4mm range to avoid reclassification
Related Products under HTS 7304.24.40.60
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Seamless 13Cr martensitic stainless steel casing with 14-inch (355.6 mm) OD and minimum 1/2 inch (12.7 mm) wall thickness for H2S-resistant sour service. Designed for high-pressure oil/gas production in corrosive formations. Classified under 7304.24.40.60 for stainless steel drill casing specs.
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