N-80 Type 5 Production Casing 13-3/8 inch 48 lb/ft
High-strength N-80 seamless casing with 339.7 mm (13-3/8 inches) OD, used in production zones of gas wells for zonal isolation. Constructed from nonalloy steel per API standards for harsh downhole conditions. HTS 7304.29.50.60 applies to its seamless, nonalloy composition and diameter for oil/gas tubing.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If having outside diameter over 406.4 mm
Larger OD casing/tubing has separate subheading within oil/gas drill pipe category.
If welded and for line pipe use
Welded line pipe for oil/gas transport classified under 7306.30, not seamless drilling tubing.
If threaded and coupled as fittings
Complete threaded/coupled assemblies treated as tube fittings under 7307.19.
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Import Tips & Compliance
• Provide ITP (Inspection Test Plan) and third-party inspection reports to validate seamless manufacturing process
• Declare exact weight per foot and OD tolerances to match statistical reporting requirements
Related Products under HTS 7304.29.50.60
API 5CT L-80 Type 9 Casing 9-5/8 inch 32.00 lb/ft
Seamless steel tubing used as casing in oil and gas wells, made from L-80 grade nonalloy steel with an outside diameter of 244 mm (9-5/8 inches). It meets API 5CT specifications for drilling applications, featuring a single wall thickness for structural support during extraction. Classified under 7304.29.50.60 due to its seamless construction, nonalloy steel material, and specified diameter range for oil/gas drilling tubing.
J-55 Seamless Oil Well Tubing 10-3/4 inch 40.50 lb/ft
J-55 grade seamless nonalloy steel tubing with 273 mm (10-3/4 inches) outside diameter, designed for production tubing in oil wells to convey fluids. It provides corrosion resistance and pressure integrity in drilling operations. Falls under HTS 7304.29.50.60 as seamless iron/nonalloy steel tubing in the 215.9-406.4 mm diameter range for oil/gas applications.
K-55 BTC Casing 16 inch 72 lb/ft
K-55 grade seamless nonalloy steel casing with 406.4 mm (16 inch) OD, featuring BTC (Buttress Threaded and Coupled) connections for oil well intermediate casing strings. Used to stabilize wellbore during drilling. Matches 7304.29.50.60 for diameter, seamless iron/nonalloy steel in oil/gas tubing.
L-80 9-5/8 inch 36 lb/ft Surface Casing
L-80 seamless surface casing tubing, 244 mm OD and 36 lb/ft weight, installed at shallow depths in gas wells for conductor protection. Nonalloy steel construction ensures durability against collapse. Classified in 7304.29.50.60 for seamless oil/gas tubing in the specified large diameter range.
API Grade C-75 Tubing 11-3/4 inch 42 lb/ft
C-75 intermediate grade seamless nonalloy steel tubing, 298.5 mm OD, used in oil production for flow assurance. Provides balanced strength for medium-pressure environments. HTS 7304.29.50.60 due to seamless construction, nonalloy material, and 215.9-406.4 mm diameter for drilling.
C-90 Sour Service Casing 12-1/4 inch 45 lb/ft
C-90 grade seamless casing optimized for H2S sour service environments in gas wells, 311.2 mm OD. Nonalloy steel with controlled hardness to prevent cracking. Fits 7304.29.50.60 as oil/gas seamless tubing in diameter range.