API 5CT C110 Alloy Steel Tubing 18-inch
C110 controlled yield strength alloy steel seamless tubing, 457.2 mm OD, for extended reach drilling. Resists sulfide stress cracking in H2S environments. Meets 7304.29.61.75 criteria as other alloy steel, seamless, large OD for gas drilling.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If chromium-molybdenum alloy under specific limits
Certain Cr-Mo alloys have dedicated subheadings based on exact composition.
If for boiler/exchanger service rather than drilling
End-use in pressure vessels uses 7306 threaded/welded pipes, not drill-specific.
If imported as hollow drill blanks
Unmachined forms are semi-finished under iron/steel articles in Chapter 72.
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Import Tips & Compliance
• Certify non-stainless alloy via ASTM A370 mechanical tests in entry docs
• Pre-clear with binding ruling if tubing has non-standard wall thickness
• Insure against thread damage; customs may reject visually imperfect oilfield tubing
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