16 inch 72 lb/ft N-80 Casing
16-inch OD seamless N-80 nonalloy steel casing for surface hole sections in oil and gas wells. Provides structural integrity during drilling, specifically engineered for diameters exceeding 406.4mm as per HTS 7304.29.20.80 classification.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If threaded with loose couplings
Certain threaded/butt-welded configurations classify under 7306 for large diameter pipes.
If imported as drill pipe rather than casing
Drill pipe has tool joint connections distinguishing it from plain-end casing.
If heavily machined with proprietary connections
Specialized end treatments may qualify as 'other articles of iron/steel'.
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
• Ensure thread type (e.g
• STC, LTC) specified in commercial invoice for proper identification
• Maintain traceability documentation from steel mill to finished pipe for origin verification
Related Products under HTS 7304.29.20.80
9-5/8 inch 40 lb/ft L-80 Casing
Seamless steel casing pipe with 9-5/8 inch outside diameter and 40 lb/ft weight, made from L-80 grade nonalloy steel for oil and gas drilling operations. Exceeds 406.4 mm (16 inches) OD requirement and classified as drill casing under 7304.29 due to its seamless construction and specific use in wellbore support.
13-3/8 inch 54.5 lb/ft K-55 Casing
Heavy-duty seamless K-55 grade casing with 13-3/8 inch OD for intermediate oil well sections, constructed from nonalloy steel. Designed for high-pressure environments in drilling operations, meeting the >406.4mm diameter criterion of HTS 7304.29.20.80.
20 inch 94 lb/ft J-55 Surface Casing
Extra-large 20-inch OD J-55 grade seamless casing used for surface conductor strings in offshore and onshore drilling. Nonalloy steel construction meets HTS 7304.29.20.80 for large diameter oil/gas well casing.
18-5/8 inch 87.5 lb/ft L-80 Production Casing
Seamless 18-5/8 inch L-80 casing for production zones in oil wells, providing pressure containment post-drilling. Nonalloy steel with OD exceeding 406.4mm qualifies under HTS 7304.29.20.80 for drilling-related casing.
10-3/4 inch 45.5 lb/ft N-80 Tieback Casing
10-3/4 inch OD N-80 seamless steel tieback casing used to extend surface casing strings in deepwater operations. Though marginally over 406.4mm, its oil/gas drilling function places it in HTS 7304.29.20.80.
24 inch 133 lb/ft Heavy Wall Casing
24-inch OD extra heavy wall seamless casing for conductor pipe applications in harsh drilling environments. Nonalloy steel construction for OD >406.4mm falls squarely under HTS 7304.29.20.80.