Heavy Wall 9-7/8" 57 lb/ft N-80 Casing
9.875 inch (251 mm) OD N-80 seamless casing with 22.5 mm wall thickness for sour service oil wells. Thick walls and OD fit 7304.29.20.40 perfectly for non-alloy drilling casing.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If smaller OD range
OD <215.9 mm heavy wall goes to lower diameter subheading.
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
• HIC/SSCC test certs mandatory for sour service claims
• Color coding per API for grade ID aids inspection
Related Products under HTS 7304.29.20.40
9-5/8" 40.50 lb/ft L-80 Surface Casing
Entry-level thick wall L-80 casing 244.5 mm OD, 13.0 mm wall for conductor casing. Borderline thick wall qualifying under 7304.29.20.40.
244.5 mm OD 20 mm Wall P-110 Casing
Metric designated 9-5/8" equivalent P-110 seamless pipe, 20 mm wall for deepwater applications.
273 mm 18 mm Wall J-55 Intermediate Casing
10-3/4" J-55 intermediate string casing with heavy 18 mm walls, seamless nonalloy steel.
251 mm OD 16 mm Wall N-80 Production Casing
9-7/8" N-80 production tubing/casing hybrid, thick wall seamless for selective completions.
"Heavy Duty 9-5/8\" 47
L-80 tieback casing extension for subsea wells, 244.5 mm OD, 17+ mm wall.
"10-3/4\" 57
Large OD conductor pipe K-55 grade, seamless thick wall for initial wellbore support.