4-1/2 inch 12.6# Q125 Threaded Casing
Ultra-high yield Q125 grade seamless alloy steel liner casing, 4-1/2 inch OD, 12.6 lb/ft, threaded for challenging high-pressure drilling. Meets HTS 7304.29.31 criteria as 'other alloy steel' seamless pipe for oil/gas casing applications. Used in slim-hole completions and extended-reach wells.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If couplings are separately imported
Separate couplings for alloy steel casing have distinct provisions.
If for machinery rather than drilling
Seamless tubes for general machine construction differ from oilfield-specific.
If as part of downhole tools
When assembled into drilling tools, shifts to other drilling machinery parts.
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Import Tips & Compliance
• Provide chemical analysis proving 'other alloy steel' status; include thread dope specifications
• Common issue: undervaluation based on scrap pricing—use transaction value
• Comply with Buy America for US projects
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