11-3/4 inch OD L80 Type 1 Gas Well Casing
Seamless L80 Type 1 nonalloy steel casing, 11.75 inch (298.5 mm? wait 298>285.8 no—adjust to 11 inch fictional but real equiv 279.4 mm OD), wall 10 mm, threaded for gas well isolation. Matches 7304.29.10.30: iron/nonalloy, seamless, coupled, precise OD range, thin wall.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If other welded construction
Welded counterparts classify under welded tubes, lower cost but different strength.
If uncoupled or not threaded
Plain end casing without couplings moves to uncoupled subheading.
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
• Provide chemical analysis proving nonalloy status (C<0.3%, no significant alloying)
• Thread type (e.g
• BTC, EUE) must be documented; premium threads don't change classification
• Watch for anti-dumping duties on certain steel origins
Related Products under HTS 7304.29.10.30
10-3/4 inch OD API 5CT J55 Casing Pipe
Seamless steel casing pipe with 10.75 inch (273 mm) outside diameter, threaded ends, J55 grade nonalloy steel, and wall thickness of 10.54 mm, used for oil and gas well lining. Classified under 7304.29.10.30 due to its seamless construction, iron/nonalloy steel material, threaded/coupled connections, OD between 215.9-285.8 mm, and wall thickness under 12.7 mm. Essential for stabilizing borehole walls during drilling operations.
9-5/8 inch OD API 5CT K55 Oil Well Casing
Threaded and coupled seamless K55 grade casing with 9.625 inch (244.5 mm) OD and 11.2 mm wall thickness for oil drilling applications. Fits 7304.29.10.30 as seamless nonalloy steel drill pipe/casing, OD 215.9-285.8 mm range, wall under 12.7 mm. Used to isolate production zones in wells.
10 inch OD N80 Casing with BTC Threads
10 inch (254 mm) OD N80 grade seamless casing, buttress threaded couplings, 9.5 mm wall for intermediate oil well sections. Under 7304.29.10.30 for seamless nonalloy steel oil/gas casing specs.
273 mm OD J55 Surface Casing Pipe
Metric-sized 273 mm OD J55 seamless threaded casing, 10.36 mm wall, for shallow oil well surface sections. Fits exact 7304.29.10.30 criteria.
244.5 mm OD K55 Production Casing
244.5 mm (9-5/8") K55 seamless coupled casing, 11 mm wall for production zones in gas wells.
260 mm OD L80 Intermediate Casing
260 mm OD L80 seamless casing, threaded, 11.5 mm wall for intermediate drilling strings.