16 inch 94 lb/ft P-110 Casing
Heavy-wall seamless P-110 grade alloy steel casing with 16-inch OD, 94 lb/ft, threaded and coupled, designed for high-pressure oil and gas wells. Falls under HTS 7304.29.31.80 as seamless 'other alloy steel' casing for drilling, with OD >406.4 mm and premium yield strength. Used to line wellbores in deep drilling operations.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If welded instead of seamless
Welded alloy steel tubes for oil/gas use classify under 7306, as 7304 is strictly for seamless products.
If not threaded or coupled
Uncoupled or plain-end casing moves to 7304.29.50, separate from threaded/coupled subheading.
If designed for gas turbine engine use
Specialized high-temp alloy casing for turbines falls under Chapter 84 machinery parts.
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Import Tips & Compliance
• Include detailed dimensional specs and weight per foot in commercial invoice; API 5CT monogram mandatory
• Pitfall: incorrect OD measurement leading to subheading shift to smaller diameters
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