12-1/4 inch 57 lb/ft Q125 Stainless Steel Casing
High-strength Q125 grade seamless stainless steel casing with 12-1/4 inch (311 mm adjusted) OD and 15.3 mm wall thickness for ultra-deep oil wells. Classified in HTS 7304.24.4040 for stainless steel drilling casing meeting OD 215.9-285.8 mm and ≥12.7 mm wall criteria. Designed for extreme pressure differentials.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If designated for water injection wells
Different principal use (water injection vs hydrocarbon production) may shift classification.
If outside diameter under 215.9 mm
Smaller diameter casing falls into preceding OD subheading.
If imported as pump/compressor parts
Specific machinery end-use classification supersedes general casing use.
Not sure which classification is right?
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Import Tips & Compliance
• Require non-destructive testing (NDT) reports for customs clearance; verify straightness tolerances as deviations common in thick-wall pipe; use proper HAZMAT declarations for any residual oils
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