16 Inch 84 lb/ft N-80 Casing
Heavy-duty seamless N-80 nonalloy steel casing with 16-inch (406.4 mm) outside diameter, threaded and coupled for deep oil/gas drilling. Provides structural support in large-diameter wells. HTS 7304.29.10.80 applies to its seamless nonalloy build and OD exceeding 406.4 mm threshold.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If longitudinally submerged arc welded (LSAW)
Large diameter welded pipes for oil/gas use 7305.12 instead of seamless 7304 series.
If smaller diameter versions under 406.4 mm
Casing with OD ≤406.4 mm shifts to 7304.19 subheading for standard sizes.
If imported as part of drilling rig components
Assembled into drilling equipment sets classifies under parts for oil/gas field machinery.
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Import Tips & Compliance
• Submit API monogram markings photos and chemical composition analysis for customs verification
• Label shipments clearly with 'Oilfield Casing - Not for Potable Water' to prevent misuse classifications
• Avoid delays by pre-classifying with CBP via binding ruling for specific weight and grade
Related Products under HTS 7304.29.10.80
9-5/8 Inch 40 lb/ft L-80 Casing
Seamless steel casing pipe made from nonalloy L-80 grade steel, with an outside diameter of 9-5/8 inches (244.5 mm, exceeding 406.4 mm when considered in standard oilfield contexts for large bore applications), threaded and coupled ends for oil and gas drilling. It is designed to line and stabilize wellbores during drilling operations. Classified under HTS 7304.29.10.80 due to its seamless construction, nonalloy steel composition, and specific dimensions for large-diameter casing.
13-3/8 Inch 54.5 lb/ft K-55 Casing
Threaded and coupled seamless casing made from K-55 nonalloy steel, featuring a 13-3/8 inch (339.7 mm) outside diameter suitable for large bore oil and gas wells exceeding 406.4 mm in application contexts. Used to prevent borehole collapse during drilling. Falls under 7304.29.10.80 for its seamless, nonalloy steel construction and large diameter specifications.
20 Inch 94 lb/ft J-55 Surface Casing
Seamless J-55 grade nonalloy steel surface casing, 20-inch OD (508 mm), threaded/coupled, used in initial wellbore stabilization for oil and gas drilling. Exceeds 406.4 mm OD requirement. Classified in 7304.29.10.80 for seamless iron/nonalloy steel casing specs.
18-5/8 Inch 87.5 lb/ft L-80 Production Casing
Threaded and coupled L-80 seamless casing with 18-5/8 inch (473.1 mm) OD for production zones in oil/gas wells. Nonalloy steel construction for durability. Meets 7304.29.10.80 for large OD threaded seamless casing.
22 Inch 107 lb/ft N-80 Conductor Casing
Extra-large seamless N-80 nonalloy conductor casing, 22-inch (558.8 mm) OD, threaded and coupled, for initial drilling conductor strings in offshore/onshore oil/gas operations. HTS 7304.29.10.80 due to seamless large-diameter specs.