Longitudinally Welded Alloy Steel Pipe for Oil Pipelines
This large-diameter pipe, with an external diameter over 406.4 mm, is longitudinally welded from alloy steel sheets and used in oil and gas transmission pipelines. It falls under HTS 7305.31.60.90 as it meets the criteria for other longitudinally welded tubes of alloy steel with circular cross-section exceeding 16 inches in diameter. The alloy composition provides enhanced strength and corrosion resistance for high-pressure applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If produced by seamless hot-working
Seamless pipes of alloy steel fall under heading 7304, regardless of diameter, as they lack welds.
If made of non-alloy steel like carbon steel
Material composition determines heading—non-alloy steel shifts to 7305.11, even if longitudinally welded.
If imported as part of a threaded pipe set for retail sale
If packaged and sold as a set with fittings for retail, it may classify under 7306 as other tubes fitted with attachments.
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Import Tips & Compliance
• Verify alloy steel composition meets ASTM A335 or equivalent standards; provide mill test certificates for customs verification
• Ensure longitudinal weld seam is documented and inspected per API 5L standards to avoid misclassification as seamless
Related Products under HTS 7305.31.60.90
Abrasion-Resistant Alloy Pipe for Mining Tailings
Extra-thick wall longitudinally welded alloy pipe >406.4mm OD for tailings slurry transport in mining. HTS 7305.31.60.90 for large welded alloy tubes. Hardfacing alloy resists wear.
Low-Temperature Service Alloy Welded Pipe
Longitudinally welded nickel-alloy steel pipe over 406.4mm for LNG terminals and arctic pipelines. HTS 7305.31.60.90 covers this large-diameter welded alloy tube. Charpy impact tested to -50°C.
Corrosion-Resistant Alloy Steel Pipe for Chemical Processing
Longitudinally welded duplex alloy steel pipe exceeding 406.4 mm diameter for corrosive chemical transport in industrial plants. HTS 7305.31.60.90 applies to this other large welded alloy tube. Duplex stainless provides pitting resistance in chloride environments.
High-Pressure Alloy Welded Pipe for Power Plant Cooling
Large diameter longitudinally welded alloy pipe for circulating high-volume cooling water in thermal power plants. Meets HTS 7305.31.60.90 criteria for welded alloy steel tubes over 406.4 mm OD. Alloy enhances fatigue resistance.
Alloy Steel Large Welded Pipe for Bridge Pile Foundations
Longitudinally welded alloy steel pipe over 16 inches diameter used as driven piles for bridge foundations. Classified HTS 7305.31.60.90 as other large welded alloy tubes. Corrosion protection via alloy selection.
Alloy Steel Large Diameter Welded Pipe for Water Transmission
A longitudinally welded alloy steel pipe exceeding 406.4 mm external diameter, designed for municipal water supply and transmission mains. Classified under HTS 7305.31.60.90 due to its welded construction, circular cross-section, and alloy steel material not specified elsewhere. Corrosion-resistant properties suit long-term buried infrastructure use.