API 5CT P110 Alloy Steel Casing Tubing 16-inch OD
High-yield P110 grade alloy steel seamless tubing with 406.4 mm OD for deepwater oil well applications. Used as production tubing to withstand extreme pressures during extraction. Fits 7304.29.61.75 as seamless, other alloy steel tubing over 16 inches OD for oil/gas drilling.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If welded rather than seamless
Welded construction shifts to 7304.39 subheading, as seamlessness is a key distinguisher in this hierarchy.
If for casing with OD not exceeding 406.4 mm
Smaller diameter casing tubing uses the 7304.29.10 series, based on size threshold in statistical suffixes.
If modified for gas compressor use in drilling
Specialized end-use in gas turbines or compressors reclassifies under Chapter 84 machinery components.
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Import Tips & Compliance
• Provide detailed chemical analysis and mechanical properties from MTRs to confirm 'other alloy steel' status excluding stainless
• Measure and document OD precisely; tubing exactly at 406.4 mm may require engineering verification for 'exceeding' criterion
• Comply with US oilfield safety regs like API RP 5C1 for threading to prevent reclassification as unfinished pipes
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