13-3/8 Inch N80 Type 1 Oil Casing
Heavy-duty seamless N80 Type 1 casing of nonalloy steel, OD 339.7 mm, wall 13.7 mm thick, for deep oil well applications. Matches 7304.29.20.60 for its seamless nonalloy steel construction as oil/gas casing with specified OD and thick walls.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If welded and for drilling
Welded tubes/pipes used in drilling (not seamless) go to 7306.30 for other welded steel tubes.
If for industrial non-drilling use
Seamless pipes not specifically for oil/gas drilling classify as other under 7304.39.
If fitted with threaded ends as fittings
Pipes with attached fittings or collars shift to 7307 for tube/pipe fittings.
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
• Label with exact API grade (e.g
• N80-1) and chemical composition to prove nonalloy status under HTS notes
• Pre-clear with CBP on thread type (e.g
• BTC) as premium connections might affect valuation
Related Products under HTS 7304.29.20.60
API 5CT J55 Oil Well Casing Pipe
Seamless casing pipe made of nonalloy steel, J55 grade, with outside diameter of 339.7 mm and wall thickness of 14.5 mm, used to line oil and gas wells. Classified under HTS 7304.29.20.60 due to its seamless construction, nonalloy steel material, casing use in drilling, OD between 285.8-406.4 mm, and thick wall exceeding 12.7 mm.
9-5/8 Inch K55 Casing for Gas Wells
Seamless nonalloy steel K55 grade casing with 355.6 mm OD and 15.9 mm wall thickness, designed for gas well drilling to stabilize boreholes. Fits HTS 7304.29.20.60 as seamless, nonalloy casing for oil/gas, OD 285.8-406.4 mm, wall ≥12.7 mm.
10-3/4 Inch L80 Casing Pipe
Seamless L80 grade nonalloy steel casing, 273.1 mm OD but up-sized variant at 292 mm OD with 16 mm wall, for high-pressure oil zones. HTS 7304.29.20.60 applies to its seamless casing role in oil/gas, qualifying dimensions, and wall thickness.
14 Inch P110 Heavy Wall Casing
Premium P110 grade seamless nonalloy casing with 355.6 mm OD and 17 mm wall thickness for extreme deepwater oil drilling. Precisely under 7304.29.20.60: seamless iron/nonalloy steel casing for oil/gas, OD range 285.8-406.4 mm, wall ≥12.7 mm.
12-1/4 Inch API Casing for Offshore Rigs
Seamless nonalloy steel API-grade casing, 323.9 mm OD, 14.2 mm wall, optimized for offshore oil rig installations. HTS 7304.29.20.60 covers this seamless oil/gas casing profile with thick walls and mid-range OD.