15-1/2 Inch Heavy Wall Alloy Casing
Seamless 15-1/2 inch (393.7 mm OD) P110 alloy steel casing with 22 mm wall thickness for high-pressure conductor strings. Fits HTS 7304.29.4160 specifications precisely: other alloy seamless, OD 285.8-406.4 mm, wall ≥12.7 mm.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If carbon or low-alloy steel
If alloy content insufficient for 'other alloy steel' heading.
If electric resistance welded
ERW manufacturing process uses 7306 heading for alloy casing.
If imported as unfinished lengths
Rough machined or annealed condition may classify as semi-finished 7304.90.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Conductor casing requires special buoyancy documentation for offshore imports
• Wall thickness >20 mm may trigger additional structural steel scrutiny
• Specify API grade and connection type (BTC, STC, etc.) on all paperwork
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