Corrosion-Resistant Alloy Drill Stem
Seamless alloy steel drill stem tubing with 168 mm OD, 25 mm wall, enhanced corrosion resistance for sour gas drilling. Meets all 7304.59.80.40 criteria exactly.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If welded sour service pipe
Welded corrosion-resistant line pipe classifies under 7306.
If with integrated connections
Drill pipe assemblies with tool joints become 8431 parts.
If standard oilfield grades
API 5CT grades have dedicated statistical numbering.
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 HIC/SSCC test results for sour service certification
• Distinguish from tool joints (8431); stems remain tubes
• Measure connection tapers carefully; plain tubes only
Related Products under HTS 7304.59.80.40
Seamless Alloy Steel Drill Pipe Casing
Heavy-duty seamless tubes made from alloy steel with a circular cross section, outside diameter of 168.3 mm, and wall thickness of 25 mm, used as protective casing in oil and gas drilling operations. Classified under HTS 7304.59.80.40 due to seamless construction, alloy steel material, specified diameter range (114.3-190.5 mm), and thick walls exceeding 19 mm.
Thick-Wall Alloy Steel Pressure Piping
Seamless circular alloy steel pipes with 152.4 mm OD and 22 mm wall thickness, engineered for high-pressure fluid transport in petrochemical plants. Fits HTS 7304.59.80.40 for seamless alloy steel, OD 114.3-190.5 mm, wall ≥19 mm.
Alloy Steel Boiler Tube for Power Plants
Seamless tubes of alloy steel, 177.8 mm OD and 28 mm wall thickness, designed for superheated steam conveyance in utility boilers. Classified in 7304.59.80.40 as seamless, alloy, circular, within OD limits, thick-walled.
Heavy-Wall Seamless Alloy Steel Cylinder Liner
Seamless alloy steel tube with 139.7 mm OD and 24 mm wall thickness, used as cylinder liners in large diesel engines. Meets 7304.59.80.40 criteria: seamless, alloy steel, circular CS, OD range 114.3-190.5 mm, wall ≥19 mm.
Alloy Steel Hydraulic Cylinder Barrel
Precision seamless alloy steel barrel, 165.1 mm OD, 21 mm wall, for heavy hydraulic cylinders in construction equipment. HTS 7304.59.80.40 applies for seamless alloy tubes of specified size and thickness.
Seamless Alloy Steel Heat Exchanger Tube
Thick-walled seamless alloy tubes, 181 mm OD and 23 mm wall, for shell-and-tube heat exchangers in refineries. Classified 7304.59.80.40: seamless, alloy, circular, correct OD range, wall ≥19 mm.