16 Inch OD API 5CT C90 Sour Service Alloy Tubing
Seamless C90 grade alloy steel tubing with 16-inch (406.4 mm) outside diameter, optimized for H2S-containing sour gas wells. Provides balanced strength and sulfide stress cracking resistance. HTS 7304.29.61.60 due to alloy steel composition, seamless process, and precise diameter for oil/gas drilling tubing.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If having outside diameter over 406.4 mm
Slightly larger OD tubing classifies in the subsequent diameter statistical breakout.
If specifically for casing rather than tubing
Casing and tubing have separate subheadings despite similar specs and use.
If when imported with submersible pumps
Pumpjack or ESP system components classify under Chapter 84 when assembled as sets.
Not sure which classification is right?
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Import Tips & Compliance
• Provide HIC (Hydrogen Induced Cracking) and SSCC test results per NACE TM0177 for sour service validation
• Confirm exact OD tolerance (±0.01 inch typical) stays within 215.9-406.4 mm bounds
• Avoid classification as casing if used strictly for production tubing applications
Related Products under HTS 7304.29.61.60
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API 5CT L80 Type 9 Alloy Steel Oilfield Tubing
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