4-1/2 Inch C-90 Threaded Liner Casing
C-90 grade 4-1/2 inch threaded liner casing for hanging in existing wellbores during remedial oil work. Meets HTS 7306.29.31.00 criteria as coupled welded steel tubing/casing for gas/oil drilling. Enables zonal isolation in extended wells.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified as tubing rather than casing
Tubing for drilling has parallel structure but separate subheading.
If externally coated or lined
Coated/lined pipes move to dedicated provisions.
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
• Specify liner hanger compatibility in docs if applicable
• Galvanized variants need surface treatment declarations
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