API 5CT L80 Stainless Steel Oil Well Casing
Seamless stainless steel casing pipe meeting API 5CT L80 specifications, with threaded ends and coupled connections, outside diameter of 4.5 inches (114.3 mm), and wall thickness of 8 mm. Designed for oil and gas drilling to line the borehole and protect well integrity. Falls under HTS 7304.24.30.10 due to its seamless construction, stainless steel material, threaded/coupled casing form, OD <215.9 mm, and wall thickness <12.7 mm.
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 alloy steel rather than stainless steel
Non-stainless alloy steel casing with same dimensions falls under 7304.29, as stainless steel is specifically distinguished in the tariff.
If imported as unfinished tube stock without threading or couplings
Unthreaded seamless stainless tubes not specifically for oil/gas drilling are classified under Chapter 73 headings for other seamless tubes.
If outside diameter is 215.9 mm or greater
Casing dimensionally identical but with larger OD exceeds the <215.9 mm threshold, moving to the next statistical suffix.
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 certification documentation to verify specifications and ensure compliance with drilling standards
• Provide mill test certificates confirming seamless construction, stainless steel grade, exact OD/wall thickness measurements
• Avoid misclassification as drill pipe by confirming primary use as protective borehole lining rather than rotation in drilling
Related Products under HTS 7304.24.30.10
4-1/2 Inch N80 Type 304 Stainless Casing
Seamless Type 304 stainless steel casing pipe per API 5CT N80 grade, 4-1/2 inch OD (114.3 mm), 9.19 lb/ft weight with 8.56 mm wall thickness, featuring BTC (Buttress Threaded and Coupled) connections. Used to stabilize wellbore during oil and gas extraction. Classified under 7304.24.30.10 for stainless steel seamless casing with OD <215.9 mm and thin walls.
2-7/8 Inch L80 Type 316L Stainless Casing
Corrosion-resistant Type 316L stainless steel seamless casing, 2-7/8 inch OD (73 mm), 6.45 mm wall thickness, threaded and coupled with STC (Short Threaded and Coupled) ends per API specs. Used in sour gas wells. HTS 7304.24.30.10 applies to its stainless seamless casing characteristics.
5 Inch J55 Stainless Steel Coupled Casing
API 5CT J55 grade seamless stainless steel casing pipe, 5 inch OD (127 mm), 10.54 lb/ft with 9 mm wall, featuring LTC (Long Threaded and Coupled) connections. Supports shallow oil wells. Fits 7304.24.30.10 for small-diameter thin-wall stainless casing.
3-1/2 Inch P110 Stainless Steel Threaded Casing
High-pressure P110 grade seamless stainless steel casing, 3-1/2 inch OD (88.9 mm), wall thickness 7.72 mm, with premium EUE (External Upset End) threaded couplings. Applied in deep oil/gas wells for structural support. Meets HTS 7304.24.30.10 criteria: stainless, seamless, casing use, small OD, thin wall.