9-5/8 Inch 13CR Alloy Casing
Seamless 13CR alloy steel casing, 13-3/8 inch (339.7 mm) OD, 16 mm wall thickness for sour service oil wells. HTS 7304.29.4160 due to seamless, alloy steel, OD 285.8-406.4 mm, thick wall specs for drilling.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If outside diameter ≤285.8 mm
Smaller diameter casing falls in 7304.23 subheading even with thick walls.
If not specifically for oil/gas drilling
Other seamless alloy steel tubes not designated for drilling classified under 7304.39.
If imported assembled with wellhead valves
Assembled into wellhead equipment, classified by function under Chapter 84.
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Import Tips & Compliance
• Provide NACE MR0175 compliance certification for sour service to support alloy classification and avoid general steel headings
• Measure and document exact OD and wall thickness per API specs to confirm 7304.29.4160 subheading
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