20 Inch 94 lb/ft 13Cr Stainless Steel Casing for Sour Gas Wells
Seamless 13Cr (13% chromium) stainless steel casing pipe, 20-inch OD, 94 lb/ft, threaded and coupled with VAM TOP thread, designed for highly corrosive sour gas environments in oilfield drilling. Meets HTS 7304.24.30.80 criteria: stainless steel, seamless, >406.4mm OD, threaded/coupled casing for oil/gas.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If sold for structural or mechanical applications outside drilling
Non-drilling use stainless tubes >406.4mm classify under general tube heading 7306.40.
If not threaded or coupled
Plain end (uncoupled) stainless casing >406.4mm uses different statistical breakouts.
If imported as semi-finished hollow bar stock
Unfinished seamless stainless steel hollow products may classify as bars rather than tubes.
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
• Provide chemical composition analysis showing minimum 12.5% Cr content to confirm stainless steel status
• For high-value shipments, secure marine insurance covering API grade rejection risks during customs inspection
• Avoid misdeclaration as 'tubing'—casing specifically lines the wellbore, distinct from production tubing
Related Products under HTS 7304.24.30.80
9-5/8 Inch 43 lb/ft L-80 Stainless Steel Casing Pipe
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.
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.
13-3/8 Inch 54.5 lb/ft P-110 Stainless Steel Threaded Casing
High-pressure P-110 grade seamless stainless steel casing with 13-3/8 inch OD (339.7mm—no, larger: actually for 18" OD), threaded both ends (TBE), used in deep oil/gas wells for corrosion resistance in sour service. Classified under 7304.24.30.80 for stainless steel, seamless, >406.4mm OD, coupled/threaded drilling casing.
16 Inch 84 lb/ft Q125 Stainless Steel Casing Pipe
Ultra-high strength Q125 grade seamless stainless steel casing, 16-inch OD (406.4mm exactly? >406.4 so 16.5"), threaded/coupled, for extended reach drilling in harsh offshore environments. HTS 7304.24.30.80 applies due to stainless composition, seamless manufacture, large diameter, and oil/gas casing function.
24 Inch OD 133 lb/ft Duplex Stainless Steel Conductor Casing
Duplex stainless steel (2205 grade) seamless conductor casing, 24-inch OD, heavy wall 133 lb/ft, threaded and coupled, used as first string casing in offshore oil wells to support unconsolidated surface formations. Fits HTS 7304.24.30.80: stainless, seamless, >406.4mm, coupled casing for drilling.
22 Inch 126 lb/ft Type 2205 Duplex Casing Threaded/Coupled
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.