12-1/4 Inch V150 Sour Service Casing
Seamless V150 alloy steel casing optimized for H2S sour service, 12-1/4 inch (311.15 mm) OD, 17 mm wall thickness. Classifies HTS 7304.29.4160 as other alloy seamless casing in OD range with heavy wall for structural support.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If surface casing with OD >406.4 mm
Larger surface casing statistical suffix 7304.29.4130.
If welded alloy steel construction
Welded 'other' alloy casing under 7306.50.
If finished with proprietary couplings
If imported with manufacturer-specific threaded connectors, may be tube fittings.
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Import Tips & Compliance
• NACE MR0175/ISO 15156 certification mandatory for sour service alloy classification
• Wall thickness variation tolerance must be documented (<12.5% under nominal)
• Ensure invoice specifies 'casing' not 'tubing' to avoid 7304.23 misclassification
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