11-3/4 inch 60 lb/ft Super Duplex Stainless Casing
Super duplex stainless steel (e.g., SAF 2507) seamless casing pipe with 11-3/4 inch (298.5 mm) OD and 13.8 mm wall thickness for offshore oil production in severe corrosion zones. HTS 7304.24.4040 covers this heavy-wall stainless steel drilling casing in the specified size range. Exceptional pitting and stress corrosion resistance.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as semi-finished billet
Unfinished stainless steel shapes classified in Chapter 72 before pipe forming.
If non-stainless carbon steel equivalent
Material composition (carbon vs stainless) determines 7304.24 vs 7304.29 heading.
If used in welded pipeline construction
Pipeline transport use vs well drilling casing shifts to Chapter 73 line pipe headings.
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Import Tips & Compliance
• Submit detailed alloy composition certificates specifying duplex grades; ensure proper marking requirements for stainless traceability; beware of transshipment documentation issues from alloy specialty mills
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