API 5CT L80 Stainless Casing 10-3/4 Inch
Seamless L80 grade stainless steel casing with 273 mm OD and 11.0 mm wall thickness for oil well protection and pressure containment. Classified in 7304.24.40.30 as seamless stainless steel casing for drilling, OD 215.9-285.8 mm, thin wall <12.7 mm.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If of iron or non-alloy steel
Non-stainless, non-alloy steel casings use 7304.23 for the base material heading, maintaining size-based subheading.
If OD exceeds 285.8 mm
Larger diameter casings (>285.8 mm OD) fall into 7304.24.50 despite matching wall thickness and material.
If imported assembled into gas drilling equipment
When supplied as integral parts of complete drilling machinery, classification shifts to Chapter 84 for gas turbines/engines.
Not sure which classification is right?
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Import Tips & Compliance
• Include API 5CT grade markings and hydrostatic test reports; check for country-of-melt restrictions on steel
• Pitfall: Incorrect OD measurement leads to wrong subheading—use caliper-verified specs
Related Products under HTS 7304.24.40.30
Stainless Steel Oil Well Casing Pipe 9-5/8 Inch OD
Seamless stainless steel casing pipe with an outside diameter of 244.5 mm and wall thickness of 10.3 mm, designed for lining oil and gas wells during drilling operations. It falls under HTS 7304.24.40.30 due to its seamless construction, stainless steel material, casing use in drilling, OD between 215.9 mm and 285.8 mm, and wall thickness less than 12.7 mm.
13-3/8 Inch OD Stainless Drill Casing Tube
Seamless stainless steel tube, 339.7 mm OD with 9.2 mm wall, serving as drill casing in oilfield operations to stabilize boreholes. Meets HTS 7304.24.40.30 criteria: seamless stainless casing/tubing for oil/gas drilling, specified OD range, thin wall.
9-5/8 Inch TP304 Stainless Oil Casing
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Stainless Steel Surface Casing 10-3/4 Inch
Seamless 316L stainless surface casing, 273 mm OD, 10.5 mm wall, used in upper well sections for conductor stability. Under 7304.24.40.30 for seamless stainless oil/gas casing, OD 215.9-285.8 mm, wall <12.7 mm.