Large Diameter Alloy Steel Penstock Pipe
Welded alloy steel pipe exceeding 406.4 mm OD, used in hydroelectric penstocks to convey water to turbines. Fits HTS 7305.39.50.00 as 'other welded tubes/pipes' of alloy steel with circular cross-section and large external diameter.
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 of non-circular cross-section
Square or rectangular profiles classify under heading 7307.
If seamless construction for high-pressure hydro use
Seamless penstocks go to 7304 for precision applications.
If imported as integral part of hydroelectric generators
Assembly with electrical equipment shifts to Chapter 85.
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
• Submit material certs showing alloy elements (e.g
• chromium >1.5%) to avoid carbon steel classification
• Document corrosion resistance specs for utility-scale applications
Related Products under HTS 7305.39.50.00
Offshore Platform Alloy Steel Riser Pipe
Welded alloy steel riser pipes >406.4 mm for connecting subsea wells to offshore platforms. HTS 7305.39.50.00: other welded alloy steel tubes, large circular diameter.
Industrial Slurry Transport Alloy Pipe
Abrasion-resistant welded alloy steel pipe >406.4 mm OD for mining slurry lines. Classified 7305.39.50.00 as large welded alloy circular pipes.
API 5L Grade B Alloy Steel Welded Pipe
Large-diameter welded pipe made from alloy steel, with external diameter over 406.4 mm, used primarily for oil and gas transmission pipelines. It falls under HTS 7305.39.50.00 as it is a welded tube/pipe of alloy steel with circular cross-section exceeding the specified diameter, not categorized elsewhere in heading 7305. Conforms to API standards for high-pressure applications.
Alloy Steel Welded Culvert Pipe
Heavy-duty welded alloy steel pipe with OD >406.4 mm, designed for stormwater drainage and culverts in infrastructure projects. Classified under 7305.39.50.00 due to its welded construction, circular cross-section, large diameter, and alloy steel material not fitting other subheadings.
Corrosion-Resistant Alloy Steel Transmission Pipe
Welded pipe of high-alloy steel (e.g., 5% Cr) with OD >406.4 mm for natural gas transmission lines. Under HTS 7305.39.50.00 as other welded alloy steel tubes/pipes meeting diameter and cross-section criteria.
Alloy Steel Welded Ventilation Duct Pipe
Large-diameter welded alloy steel pipe for industrial exhaust and ventilation systems in factories. Fits 7305.39.50.00: welded, circular cross-section >406.4 mm OD, alloy steel material.