7 Inch K-55 BTC Coupled Casing
K-55 grade 7-inch casing with Buttress Threaded and Coupled (BTC) connections for production zones in gas wells. Under HTS 7306.29.31.00 for its welded, threaded design tailored to oil/gas drilling. Offers balanced strength and cost for intermediate applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If welded and longitudinally submerged arc (LSAW) for large diameters
Specific welding method for certain large casings changes subheading.
If specialized for pump/compressor use in drilling
Parts of pumps used in drilling may go to Chapter 84.
If used as drill pipe rather than casing
Drill pipes, even if similar, have distinct 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
• Use ISPM-15 certified wooden dunnage for shipping to prevent quarantine issues
• Document exact coupling type (BTC, STC) as mismatches cause rejections
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