Alloy Steel Large Diameter Welded Pipe
A welded pipe made from alloy steel with a circular cross-section and external diameter exceeding 406.4 mm, used primarily for oil and gas transmission pipelines. It falls under HTS 7305.90.50.00 as it is an other tube or pipe of alloy steel, not further worked, meeting the size criteria for large-diameter applications.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | +35.0% | 35% |
| 🇲🇽Mexico | Free | +10.0% | 10% |
| 🇨🇦Canada | Free | +10.0% | 10% |
| 🇩🇪Germany | Free | +10.0% | 10% |
| 🇯🇵Japan | Free | +10.0% | 10% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If external diameter does not exceed 406.4 mm
Pipes with OD ≤406.4 mm shift to Chapter 73 heading 7304 for other alloy steel tubes and pipes.
If threaded or fitted with welded joints
Further working like threading classifies it under 7306 as other tubes fitted with attachments.
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Import Tips & Compliance
• Verify alloy steel composition via mill test certificates to confirm classification under 7305.90.50.00 and avoid misclassification as carbon steel
• Measure external diameter precisely and document it exceeds 406.4 mm; provide engineering drawings if challenged by customs
• Ensure proper marking of country of origin and steel grade to comply with Buy America or similar regulations for infrastructure projects
Related Products under HTS 7305.90.50.00
Alloy Steel Spiral Welded Pipeline Tube
Spiral welded tube of alloy steel, circular cross-section over 406.4 mm OD, designed for long-distance natural gas pipelines. Classified in 7305.90.50.00 as an other welded pipe of alloy steel for large-diameter applications, not seamless or further processed.
Alloy Steel Submerged Arc Welded Pipe
Large-diameter pipe produced via submerged arc welding from alloy steel, with OD >406.4 mm for water transmission mains. It qualifies for HTS 7305.90.50.00 as other riveted or similarly closed tubes of alloy steel in the specified size range.
Alloy Steel Large Diameter LSAW Pipe
Longitudinally submerged arc welded (LSAW) alloy steel pipe exceeding 406.4 mm OD, used in offshore oil platforms. Falls under 7305.90.50.00 for other large circular cross-section pipes of alloy steel, welded construction.
Alloy Steel ERW Large Transmission Pipe
Electric resistance welded (ERW) alloy steel pipe with circular cross-section OD >406.4 mm for crude oil transmission lines. Classified in HTS 7305.90.50.00 as other tubes and pipes of alloy steel meeting the large diameter specification.
Alloy Steel DSAW Water Main Pipe
Double-sided submerged arc welded (DSAW) pipe of alloy steel, OD exceeding 406.4 mm, for municipal water distribution mains. It is an other welded pipe under HTS 7305.90.50.00 due to alloy composition and large circular cross-section.
Alloy Steel HFW Oil Pipeline Tube
High-frequency welded (HFW) alloy steel tube with external diameter >406.4 mm for refined oil product pipelines. Meets HTS 7305.90.50.00 criteria as other large-diameter welded pipes of alloy steel.