18-5/8 Inch 87.5 lb/ft Super Duplex Stainless Casing
Super duplex stainless steel (2507 grade) seamless casing pipe with 18-5/8 inch OD, 87.5 lb/ft, VAM 21 threaded connections, for high-pressure high-temperature (HPHT) gas wells. Classified in 7304.24.30.80 for large diameter threaded stainless steel seamless 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 general mechanical tubing applications
Non-OCTG stainless welded tubes >406.4mm classify differently from drilling casing.
If different statistical weight breaks
Precise weight per foot determines .30 vs .40 statistical suffixes within same heading.
If hollow drill bars rather than casing
Drilling bars with different end treatments classify under 7228 iron/steel bars.
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
• Super duplex requires ferrite content verification (35-65%); non-conforming material faces rejection
• Use FDA-equivalent cleanliness standards if any food-grade certification claimed erroneously
• Bundle with coupling stock under same entry but separate line items to avoid averaging issues
Related Products under HTS 7304.24.30.80
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This seamless stainless steel casing pipe has an outside diameter of 9-5/8 inches (244.5 mm, exceeding 406.4 mm? Wait, no—9-5/8" is 244 mm, but hierarchy specifies >406.4mm which is 16"), so for larger OD like 20". Correcting: This is 20-inch OD L-80 type 13CR stainless steel casing, threaded and coupled, used in oil and gas drilling to line wellbores and stabilize formations. It falls under HTS 7304.24.30.80 due to its seamless construction, stainless steel material, casing use, threaded/coupled ends, and outside diameter exceeding 406.4 mm.
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24 Inch OD 133 lb/ft Duplex Stainless Steel Conductor Casing
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Type 2205 duplex stainless seamless casing, 22-inch OD, 126 lb/ft nominal weight, integral threaded and coupled joints, API 5CT certified for oil and gas well construction in corrosive formations. HTS 7304.24.30.80 due to stainless steel, seamless, large diameter (>406.4mm), threaded casing designation.