11-3/4 Inch Q125 Casing Coupled
Ultra-high strength Q125 seamless alloy steel casing, 11-3/4 inch (298.5 mm) OD, coupled ends, 11.2 mm wall thickness for high-pressure oil well applications. Fits HTS 7304.29.31.50 as threaded/coupled alloy steel casing in the specified OD and thin-wall range.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for boiler/condenser/superheater tube applications
Repurposed seamless tubes for pressure vessels classify under 7306 boiler tube headings.
If imported uncoupled/plain end
Lack of threading/coupling moves it to 'other' casing category excluding coupled items.
If parts of oil/gas drilling machines
If invoiced specifically as drill pipe component rather than standalone casing, may go to Chapter 84.
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
• Submit yield strength test data (Q125 >125 ksi) from independent labs to confirm alloy grade classification
• Ensure coupling material matches pipe body alloy to avoid separate classification for accessories
Related Products under HTS 7304.29.31.50
API 5CT L80 Type 9 Casing Pipe 9-5/8 Inch
Seamless alloy steel casing pipe meeting API 5CT L80 Type 9 specifications, with an outside diameter of 9-5/8 inches (244.5 mm), threaded ends, and wall thickness of 10.5 mm, used for oil and gas well casing. It falls under HTS 7304.29.31.50 due to its seamless construction from alloy steel, OD between 285.8 mm and 406.4 mm, and wall thickness less than 12.7 mm.
13-3/8 Inch P110 Casing with BTC Threads
High-strength P110 grade seamless alloy steel casing, 13-3/8 inch (339.7 mm) OD, coupled with Buttress Threaded and Coupled (BTC) connections, 11 mm wall thickness for intermediate casing strings in deep wells. Classified under HTS 7304.29.31.50 for its alloy steel composition, specified OD range, and thin wall.
9-5/8 Inch T95 Casing Pipe Threaded
T95 grade seamless alloy steel casing with 9-5/8 inch OD (244.5 mm but adjusted spec variant at 290 mm effective), 9.8 mm wall, premium class threads for sour service environments in oil/gas wells. Meets HTS 7304.29.31.50 criteria for alloy steel drilling casing with OD 285.8-406.4 mm and thin walls.
14 Inch V150 Sour Service Casing
V150 grade seamless alloy steel casing optimized for H2S sour service, 14 inch (355.6 mm) OD, 10.9 mm wall, EUE/HTC threads, used in corrosive gas well environments. Classified in HTS 7304.29.31.50 for its drilling-specific design, alloy composition, and dimensional specs.