18-5/8 inch 87.5 ppf Duplex Stainless Steel Casing
Duplex stainless steel (e.g., 2205 grade) seamless casing for geothermal/oil hybrid wells, 18-5/8 inch OD, 87.5 lb/ft. Provides superior corrosion and stress corrosion cracking resistance. Perfect fit for HTS 7304.24.40.80 as large OD seamless stainless oil/gas casing.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If duplex steel classified as carbon steel product
Rare misclassification occurs when duplex not recognized as stainless; significantly lower duties apply.
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
• Specify PREN value (>40 for duplex) in material certificates to confirm stainless steel classification
• Include full PMI results showing dual phase microstructure
• For geothermal use, obtain end-user certificate to prevent reclassification as line pipe
Related Products under HTS 7304.24.40.80
9-5/8 inch 43 ppf L-80 Stainless Steel Oil Well Casing
Seamless stainless steel casing pipe with 9-5/8 inch outside diameter and 43 pounds per foot weight, designed for oil and gas drilling operations to line and stabilize wellbores. Classified under HTS 7304.24.40.80 due to its seamless construction, stainless steel material, use as oil/gas casing, and OD exceeding 406.4 mm (16 inches). Meets API 5CT specifications for L-80 grade in sour service environments.
13-3/8 inch 54.5 ppf P-110 Stainless Steel Casing
Heavy-duty seamless stainless steel casing for deepwater oil/gas wells, 13-3/8 inch OD, 54.5 lb/ft, P-110 grade for high-pressure environments. Falls under HTS 7304.24.40.80 as seamless stainless steel oil/gas casing with OD >406.4mm, per API 5CT standards for premium grade tubulars.
16 inch 84 ppf Q125 Stainless Steel Production Casing
Ultra-high strength seamless stainless steel casing for production zones in HPHT wells, 16-inch OD, 84 lb/ft, Q125 grade. HTS 7304.24.40.80 applies to its seamless stainless steel construction, oil/gas casing application, and large diameter exceeding 406.4mm.
20 inch 94 ppf 13Cr Stainless Steel Conductor Casing
Seamless 13Cr martensitic stainless steel conductor casing for offshore oil platforms, 20-inch OD, 94 lb/ft weight. Designed to support surface formations in corrosive marine environments. Classifies under HTS 7304.24.40.80 for seamless stainless steel oil/gas casing >406.4mm OD.
10-3/4 inch 51.5 ppf SMSS 13-5-2 Casing
Super martensitic stainless steel (13-5-2) seamless casing for subsea oil/gas completions, 10-3/4 inch OD exceeding 406.4mm specification. Engineered for extreme sour service and high collapse resistance. HTS 7304.24.40.80 due to stainless steel composition and oilfield casing use.