Alloy Steel Surface Casing for Offshore Oil Rigs
This is a heavy-walled welded alloy steel surface casing with a 24-inch outer diameter, used in offshore oil drilling to seal upper borehole sections against formation fluids. It is classified under tariff item 7305.20.00 as casing of a kind used in drilling for oil or gas, with an external diameter exceeding 406.4 mm and welded construction.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | +50.0% | 50% |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
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Steel · Required
Global Affairs Canada: GAC Steel (Carbon Steel) requires review / declaration data. CBSA's Single Window matching criteria match this classification number (Within Range 7304000000–7306999999).
CBSA Single Window matching criteria, unknown
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the casing is seamless rather than welded
Seamless casing of a kind used in drilling for oil or gas is classified under heading 7304, which covers seamless tubes and pipes.
If the casing is longitudinally submerged arc welded and used for pipelines
Longitudinally submerged arc welded line pipe for oil or gas pipelines is a separate tariff item under the same heading.
If the external diameter is 406.4 mm or less
Smaller-diameter welded casing falls under heading 7306, which covers other tubes and pipes with an external diameter not exceeding 406.4 mm.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• For offshore use, ensure the casing meets Canadian petroleum industry standards (e.g
• API 5CT) and provide material test certificates to CBSA
• Verify the external diameter exceeds 406.4 mm; otherwise, classification shifts to heading 7306
• Consider using a customs broker familiar with oil and gas equipment to handle any technical classification questions
Related Products under Tariff item 7305.20.00
13-3/8" Alloy Steel Surface Casing
Threaded and coupled 13-3/8 inch alloy steel surface casing for initial wellbore support in oil drilling operations. This welded iron/steel tube with a circular cross-section exceeding 406.4 mm external diameter is classified under tariff item 7305.20.00 as alloy casing of a kind used in drilling for oil or gas.
16-Inch OD L80 Coupled Casing for Gas Wells
Welded L80 grade nonalloy steel casing with a 16-inch outer diameter and coupled ends, used to protect and support gas well bores. Its circular cross-section exceeds 406.4 mm, meeting the tariff item's dimensional requirements.
16-Inch OD Welded Oil Well Casing
Heavy-duty welded casing tube of nonalloy steel with a 16-inch external diameter, used in oil drilling to prevent borehole collapse and protect aquifers. The circular cross-section exceeds 406.4 mm, meeting the tariff item's requirements.
16" Q125 Premium Threaded Casing
Q125 high-collapse strength alloy casing with a 16-inch external diameter, threaded and coupled per API specifications for challenging oil drilling. This welded alloy steel pipe exceeds 406.4 mm in diameter and is classified under tariff item 7305.20.00 as casing of a kind used in drilling for oil or gas.
17.5-inch Alloy Casing for Horizontal Shale Drilling
Welded alloy steel intermediate casing with a 17.5-inch external diameter, optimized for extended reach horizontal drilling in shale formations. This large circular cross-section pipe exceeds 406.4 mm and is classified under tariff item 7305.20.00 as casing of a kind used in drilling for oil or gas.
17-Inch Intermediate Casing Pipe
17-inch outer diameter welded intermediate casing of nonalloy steel for multi-stage oil drilling support. Its circular cross-section exceeds 406.4 mm, qualifying under this tariff item.