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.
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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.
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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
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