API 5CT L-80 Threaded Casing
L-80 grade alloy steel threaded casing with coupled joints, external diameter over 406.4 mm, used to stabilize wellbores during oil extraction. Fits HTS 7305.20.60.00 as welded, large-diameter alloy steel pipe explicitly for drilling casing with threading for assembly. Its high-strength alloy meets demanding downhole conditions.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If seamless and alloy steel
Seamless versions classified under 7304.39 for other seamless alloy tubes, not welded.
If not threaded/coupled
Uncoupled welded alloy casing moves to general 7305.20.20 subheading.
If imported as part of gas drilling machinery
When assembled into complete drilling equipment, may classify under Chapter 84 machinery parts.
Not sure which classification is right?
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Import Tips & Compliance
• Include PSL-2 quality level documentation if specified; inspect for thread galling during customs exam
• Pitfall: Failing to declare exact alloy grade risks reclassification
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