14 Inch 54# K55 Intermediate Casing
K55 seamless intermediate casing, 14 inch (355.6 mm) OD, 54 lb/ft, 12.2 mm wall thickness (under limit), LTC threaded couplings, nonalloy steel for corrosive environment wells. Perfect match for HTS 7304.29.10.50 thin-wall category.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If electric resistance welded
ERW manufacturing process excludes from seamless 7304, goes to 7306.19.
If wall thickness exceeding 25.4 mm
Heavy wall structural casing has distinct statistical suffix.
If boiler or superheater tubes
High-pressure boiler end-use shifts away from drilling classification.
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
• Drift mandrel test results confirm internal diameter for customs dimensional check
• Specify exact thread form (LTC/STC/BTC) in entry docs
• Galvanized coating? Reclassifies to surface-treated steel headings
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