4-1/2 Inch N80 Type 304 Stainless Casing
Seamless Type 304 stainless steel casing pipe per API 5CT N80 grade, 4-1/2 inch OD (114.3 mm), 9.19 lb/ft weight with 8.56 mm wall thickness, featuring BTC (Buttress Threaded and Coupled) connections. Used to stabilize wellbore during oil and gas extraction. Classified under 7304.24.30.10 for stainless steel seamless casing with OD <215.9 mm and thin walls.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If made of carbon steel
Carbon steel versions of identical casing dimensions fall under 7304.23, with stainless separated into its own subheading.
If imported assembled as part of complete drilling equipment
When supplied as components of oil/gas drilling machines, classification shifts to Chapter 84 parts rather than raw pipes.
If having wall thickness of 12.7 mm or greater
Thicker-walled stainless casing with same OD and threading moves to the adjacent thickness category.
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
• Include hydrostatic test reports and chemical composition analysis proving stainless steel grade and seamless manufacture
• Label shipments clearly as 'oil well casing' to prevent confusion with line pipe or structural tubing
• Verify coupling specifications match API standards to avoid reclassification as uncoupled tubing
Related Products under HTS 7304.24.30.10
API 5CT L80 Stainless Steel Oil Well Casing
Seamless stainless steel casing pipe meeting API 5CT L80 specifications, with threaded ends and coupled connections, outside diameter of 4.5 inches (114.3 mm), and wall thickness of 8 mm. Designed for oil and gas drilling to line the borehole and protect well integrity. Falls under HTS 7304.24.30.10 due to its seamless construction, stainless steel material, threaded/coupled casing form, OD <215.9 mm, and wall thickness <12.7 mm.
2-7/8 Inch L80 Type 316L Stainless Casing
Corrosion-resistant Type 316L stainless steel seamless casing, 2-7/8 inch OD (73 mm), 6.45 mm wall thickness, threaded and coupled with STC (Short Threaded and Coupled) ends per API specs. Used in sour gas wells. HTS 7304.24.30.10 applies to its stainless seamless casing characteristics.
5 Inch J55 Stainless Steel Coupled Casing
API 5CT J55 grade seamless stainless steel casing pipe, 5 inch OD (127 mm), 10.54 lb/ft with 9 mm wall, featuring LTC (Long Threaded and Coupled) connections. Supports shallow oil wells. Fits 7304.24.30.10 for small-diameter thin-wall stainless casing.
3-1/2 Inch P110 Stainless Steel Threaded Casing
High-pressure P110 grade seamless stainless steel casing, 3-1/2 inch OD (88.9 mm), wall thickness 7.72 mm, with premium EUE (External Upset End) threaded couplings. Applied in deep oil/gas wells for structural support. Meets HTS 7304.24.30.10 criteria: stainless, seamless, casing use, small OD, thin wall.