Copper tube tradeDocket A-552-831Final results, October 28, 2026
Commerce finds dumping of Vietnamese copper tube would likely resume at up to 8.35% if the 2021 order ended
The Commerce Department completed its part of the first five-year review of the antidumping order on seamless refined copper pipe and tube from Vietnam. Vietnam supplied 39.9% of U.S. imports of the tube by weight in 2020, the year the case opened, and 0.4% in 2025.
- Likely dumping margin without the order
- 8.35%the same rate the 2021 order set
- Vietnam share, 2020
- 39.9%29,092 t
- Vietnam share, 2025
- 0.4%340 t
- All imports, Jan to Aug 2026
- −39.0%from the same months of 2025
Monthly entries, HTS 7411.10.1030 and 7411.10.1090
Imports from Vietnam fell from 6,537 tons in October 2020 to 15 tons a month later
U.S. general imports of refined copper tubes and pipes, metric tons a month, January 2018 to August 2026. The amber band runs from the start of the investigation in August 2020 to the order in August 2021; the amber rule marks the Section 232 copper tariff from August 2025. August 2026 is the latest month published, and the figures can be revised. Source: U.S. Census Bureau, international trade API.
The Commerce Department found that ending its antidumping duty order on seamless refined copper pipe and tube from Vietnam would likely bring back dumping at margins up to 8.35%. An antidumping duty is an extra duty on imports that Commerce finds are sold in the United States below fair value, and the dumping margin is that gap as a percentage of the price. The finding, published in the Federal Register on October 28, 2026, completes Commerce's part of the first five-year review of the order, which took effect on August 13, 2021. The U.S. International Trade Commission (ITC) runs a separate review of whether ending the order would likely lead to renewed injury to U.S. producers.
Commerce ran the review on an expedited 120-day schedule. A trade association whose members make the tube in the United States filed a full response, and Commerce received no substantive response from any Vietnamese producer, exporter or other respondent party.
What the import data show
Vietnam's share of the tonnage went from 39.9% in 2020 to 0.5% in 2021
Before the case, Vietnam was the largest foreign source of this tube. Census Bureau trade data show 29,092 metric tons of refined copper tube imported from Vietnam in 2020, 39.9% of the 72,848 tons that entered the United States under the two tariff numbers the order names. In 2021 the figure was 373 tons, or 0.5%. In 2025 it was 340 tons, 0.4% of the total.
The drop came within the investigation itself. Imports from Vietnam reached 6,537 tons in October 2020, two months after Commerce published the start of its investigation on August 4, 2020. They fell to 15 tons in November and to none from January through March 2021. Commerce's preliminary determination came on February 1, 2021, and the order makes entries from that date subject to the duty.
Annual entries by origin
Total imports were 71,679 tons in 2021, close to the 72,848 of 2020, as other countries shipped more
U.S. general imports of refined copper tube by year, metric tons, with Vietnam at the bottom of each bar and its share of the year's tonnage above it. Source: U.S. Census Bureau.
Total imports stayed near the 2020 level as other countries shipped more. The United States imported 71,679 tons in 2021, close to the 2020 total, and 90,547 tons in 2022, the most in the eight years shown. By 2025 South Korea supplied 21.0% of the tonnage, Thailand 19.8%, Canada 14.8% and Germany 11.0%.
Origin board, top six by weight
South Korea led in 2025 with 21.0% of the tonnage, after Vietnam's 39.9% led in 2020
2020Tons and share
- 1Vietnam29,092 t39.9%
- 2Canada13,255 t18.2%
- 3South Korea7,610 t10.4%
- 4Mexico4,706 t6.5%
- 5Thailand4,516 t6.2%
- 6Greece3,078 t4.2%
2025Tons and share
- 1South Korea16,067 t21.0%
- 2Thailand15,181 t19.8%
- 3Canada11,351 t14.8%
- 4Germany8,438 t11.0%
- 5Brazil5,742 t7.5%
- 6Mexico5,225 t6.8%
- Vietnam340 t0.4%
The six largest sources of U.S. refined copper tube imports by weight in 2020 and 2025, HTS 7411.10.1030 and 7411.10.1090. Shares are of all imports in the year, and both boards use one scale. Vietnam's 2025 line comes from the annual totals. Source: U.S. Census Bureau.
Customs value per kilogram rose from $7.79 in 2020 to $11.69 in 2025. The Census Bureau's customs value is the price paid for the goods, before U.S. duties, freight and insurance, and an average per kilogram moves with the copper price and with the mix of products and countries.
Annual manifest
Average customs value rose from $7.79 a kilogram in 2020 to $11.69 in 2025
| Year | All imports (t) | From Vietnam (t) | Vietnam share | Vietnam share, bar | Customs value ($ million) | Average ($/kg) |
|---|---|---|---|---|---|---|
| 2018 | 59,009 | 18,316 | 31.0% | 489.6 | 8.30 | |
| 2019 | 60,716 | 20,246 | 33.3% | 483.2 | 7.96 | |
| 2020 | 72,848 | 29,092 | 39.9% | 567.8 | 7.79 | |
| 2021 | 71,679 | 373 | 0.5% | 808.2 | 11.28 | |
| 2022 | 90,547 | 1,133 | 1.3% | 1,047.0 | 11.56 | |
| 2023 | 64,158 | 150 | 0.2% | 711.6 | 11.09 | |
| 2024 | 82,374 | 717 | 0.9% | 940.6 | 11.42 | |
| 2025 | 76,504 | 340 | 0.4% | 894.1 | 11.69 |
U.S. general imports of refined copper tube, HTS 7411.10.1030 and 7411.10.1090, by year. Average value is customs value divided by weight. Source: U.S. Census Bureau. Download the data: annual (CSV), monthly (CSV), top sources (CSV).
Imports so far this year are well below 2025. From January through August 2026 they came to 36,803 tons, 39.0% less than in the same months of 2025, and their customs value fell 24.4% to $529.7 million. Those months all fall under the Section 232 copper tariff described below. The trade figures do not separate the effect of the tariff from other causes.
Year to date, January to August
Imports from January through August 2026 came to 36,803 tons, 39.0% less than in 2025
U.S. general imports of refined copper tube from every country, January through August of each year, metric tons. Customs value for the same months fell 24.4% to $529.7 million. Source: U.S. Census Bureau, data (CSV).
What the order covers
The 2021 order set one rate, 8.35%, for every Vietnamese exporter
The order covers seamless circular refined copper pipe and tube at least 6 inches long and less than 12.130 inches in outside diameter, whatever the wall thickness, bore, finish, coating or insulation, straight or coiled. The scope names tube made to ASTM specifications including B88, the standard for copper water tube, and B280, the standard for air-conditioning and refrigeration field service tube. It also covers line sets, the paired copper tubes that connect an outdoor air conditioner or heat pump to the indoor coil, with or without fittings and insulation.
Refined copper here means metal of at least 99.85% copper, or at least 97.5% copper with limits on each other element. The order lists tariff numbers 7411.10.1030 and 7411.10.1090, and says covered tube may also enter under four others, including two for air-conditioner parts. Commerce states that the written description, not the tariff number, decides what is covered.
The 2021 order set the same estimated dumping margin, 8.35%, for the three exporters it named and for all other Vietnamese exporters. Customs collects a cash deposit at that rate when the tube enters, and the final duty is assessed later on Commerce's instructions.
Cash deposit rates by exporter
All four rates in the order are 8.35%
- Hailiang (Vietnam) Copper Manufacturing Company Limited / Hongkong Hailiang Metal Trading Limited8.35%
- Jintian Copper Industrial (Vietnam) Company Limited8.35%
- Toan Phat Copper Tube Joint Stock Company8.35%
- All other exporters (Vietnam-wide entity)8.35%
Estimated weighted-average dumping margins in the 2021 antidumping duty order, percent. Source: Antidumping Duty Order, 86 FR 44691, Federal Register.
How the duties stack
The Section 232 tariff of 50% applies to this tube from every country
The antidumping order applies only to tube from Vietnam. The Section 232 copper tariff applies to imports from every country. Section 232 of the Trade Expansion Act of 1962 lets the president adjust imports that threaten national security. Proclamation 10962 put a 50% tariff on semi-finished copper products from August 1, 2025, and its annex lists subheading 7411.10.10, the refined copper tube in this case. The proclamation says the tariff is in addition to any other duties unless it states otherwise. Proclamation 11021 lists the same tube in its Annex I-A, at 50% of the full customs value from April 6, 2026.
Section 232 copper tariff
50%
Tube from every country, from August 1, 2025. Proclamation 11021 sets it on the full customs value from April 6, 2026.
Antidumping cash deposit
8.35%
Tube from Vietnam only, on entries from February 1, 2021, under the order of August 13, 2021.
Case tracking
Commerce published its final results on October 28, 2026, and the ITC's review is still open
- Commerce publishes the start of its antidumping investigation
- Commerce publishes its preliminary determination; duties can apply to entries from this date
- Commerce publishes its final determination of sales at less than fair value
- The ITC notifies Commerce that imports injured the U.S. industry
- Commerce publishes the antidumping duty order
- Section 232 tariff of 50% on semi-finished copper products takes effect
- Proclamation 11021 sets the copper tariff at 50% of full customs value for Annex I-A articles
- Commerce and the ITC publish the start of the first five-year review
- Commerce publishes its final results: dumping likely to continue at up to 8.35%
- The ITC publishes its determination on whether the order continues for another five years
The antidumping case on copper pipe and tube from Vietnam and the Section 232 copper tariff, by date of publication or effect. Amber rings mark the dates a duty began to apply. Sources: Federal Register documents for docket A-552-831, Proclamation 10962, Proclamation 11021.
Before you order
What to ask on a copper tube quote
- Ask the supplier for the country of origin of the tube or line set, and whether the price includes the Section 232 duty. On tube from Vietnam, also ask whether it includes the antidumping cash deposit, and who is the importer of record, since that company owes the duties.
- If you import tube yourself, a customs broker can confirm the tariff number, the cash deposit rate in force for the exporter and how the two duties apply to an entry. A trade attorney can advise on whether a product falls inside the scope.
- Ask which copper price and which date a tube quote is built on, and how many days the quote holds.
Caveats
The ITC's determination had not been published as of November 2, 2026
The ITC's determination in its review had not appeared in the Federal Register when it was checked on November 2, 2026, so whether the order continues for another five years is still open. Commerce's 8.35% is the margin it finds likely to prevail without the order. It matches the rate in the 2021 order, and the notice reports no new price comparison.
The Census figures are general imports under the two tariff numbers, as published when checked on November 2, 2026, and can be revised. They include tube from every country and leave out covered tube that enters under other numbers, such as line sets classified as air-conditioner parts. Customs value is before duties, freight and the distributor's markup, so it says little about the price of a particular order, which also carries cutting, freight and any surcharge.