7 Inch 32 ppf K-55 Casing
Heavy-duty seamless K-55 grade casing with 7-inch OD, 32 lb/ft, and wall thickness over 12.7 mm for high-pressure oil wells. Used to stabilize wellbores during drilling for oil or gas extraction. Fits HTS 7304.29.20.20 as iron/nonalloy steel, seamless, <215.9 mm OD, thick-walled.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for tubing rather than casing
Oilfield tubing has distinct specifications and falls under separate tubing subheading.
If wall thickness under 12.7 mm
Thinner-walled casings are classified in the adjacent thickness breakpoint.
If supplied as drill pipe
Pipes specifically for drilling operations are classified separately from casing.
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
• Provide thread type (e.g
• LTC, STC) details and hydrostatic test certificates for customs clearance
• Label shipments clearly as 'oil well casing' to distinguish from general tubing and avoid reclassification
• Monitor steel alloy content certificates to confirm nonalloy status under HTS definitions
Related Products under HTS 7304.29.20.20
9-5/8 Inch 43 ppf L-80 Casing
Seamless steel oil well casing pipe with 9-5/8 inch outside diameter, 43 pounds per foot weight, and L-80 grade, featuring a wall thickness exceeding 12.7 mm. Designed for oil and gas drilling to line the borehole and protect against collapse. Classified under HTS 7304.29.20.20 due to its seamless construction, nonalloy steel material, small diameter under 215.9 mm, and thick walls.
8-5/8 Inch 40 ppf J-55 Casing
J-55 grade seamless nonalloy steel casing, 8-5/8 inch diameter, 40 lb/ft, with wall thickness ≥12.7 mm for intermediate oil well sections. Essential for preventing contamination and structural support in drilling. Matches HTS 7304.29.20.20 criteria perfectly.
4-1/2 Inch 12.6 ppf N-80 Casing
N-80 type 1 seamless casing for slimhole drilling, 4-1/2 inch OD, 12.6 lb/ft, wall thickness 12.7 mm or greater. Provides corrosion resistance in sour gas environments. HTS 7304.29.20.20 due to seamless nonalloy steel, small OD, thick wall specs.
5-1/2 Inch 20 ppf L-80 Type 9Cr Casing
L-80 9Cr seamless casing for corrosive environments, 5-1/2 inch OD, 20 lb/ft, wall >12.7 mm. Chromium-enhanced for oil/gas well integrity. Still nonalloy per HTS, classifies under 7304.29.20.20.
6-5/8 Inch 27 ppf P-110 Casing
High-strength P-110 grade seamless casing, 6-5/8 inch OD, 27 lb/ft, wall thickness ≥12.7 mm for deep oil wells. Withstands extreme pressures in drilling operations. HTS 7304.29.20.20: seamless iron/nonalloy, <215.9 mm OD.
10-3/4 Inch 54.5 ppf Heavy Casing
Extra heavy 10-3/4 inch OD, 54.5 lb/ft L-80 casing with wall thickness exceeding 12.7 mm for surface hole protection in oil drilling. Seamless nonalloy steel construction. Qualifies under HTS 7304.29.20.20 small diameter thick wall provisions.