South Korea supplies 57.9% of U.S. imports of Large-Diameter Line Pipe (Over 406.4 mm), across 11 countries (year to date through September 2026).
HHI 4,221 of 10,000 · HHI above 1,800. The sum of each country’s squared percentage share; one country with everything scores 10,000.
11 countries supplying this product to the U.S.
| Rank# | Country | Value | Share | YoY | Duty |
|---|---|---|---|---|---|
| 1 | South Korea | $14.3M | 67.8% | +52.9% | 50.0% |
| 2 | Germany | $3.9M | 18.5% | -81.6% | 50.0% |
| 3 | United Kingdom | $2.2M | 10.6% | +171.4% | 25.0% |
| 4 | Mexico | $659K | 3.1% | -10.7% | 50.0% |
| 5 | Indonesia | -- | 0.0% | -18.2% | -- |
| 6 | Taiwan | -- | 0.0% | -80.4% | -- |
| 7 | Canada | -- | 0.0% | -100.0% | -- |
| 8 | Japan | -- | 0.0% | +957.2% | -- |
| 9 | Greece | -- | 0.0% | +721.4% | -- |
| 10 | United Arab Emirates | -- | 0.0% | -- | -- |
| 11 | India | -- | 0.0% | -97.6% | -- |
Duty is the duty Census calculated on this month's imports for consumption from each country, as a share of their customs value. It applies the rates in force, additional duties such as Section 301, 232 and IEEPA included and claimed trade-agreement preferences netted out, so it is an observed rate rather than a statutory one. It is an estimate, not duty collected: antidumping and countervailing duties, fees and later refunds are not in it. YoY compares year-to-date value with the same months last year.