7 Inch L80 13Cr Corrosion-Resistant Casing
7-inch L80 grade casing featuring 13% chromium content for sour gas environments in oil drilling, welded construction without fittings. Falls under HTS 7306.29.41.00 for other steel casing used in oil or gas drilling. Provides high collapse resistance for production casing strings.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If with attached threaded connectors
Threaded or coupled casing is distinctly classified from plain pipe in 7306.19.
If considered semi-finished hollow sections
Alloy steel hollow bars/sections over 16mm dimension may fall under Chapter 72 if not fully tubular.
If of stainless steel construction
Stainless fittings-attached tubes shift to 7307 subheadings.
Not sure which classification is right?
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Import Tips & Compliance
• Certify compliance with NACE MR0175 for sour service; label with exact Cr content
• Common issue: misdeclaring as line pipe under 7304/7306
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