Commerce Finalizes 15.52 Percent Dumping Margin on Vietnamese Oil Pipe

The U.S. Department of Commerce finalized antidumping duties on oil country tubular goods (OCTG) from the Socialist Republic of Vietnam, setting a 15.52 percent weighted-average dumping margin for SeAH Steel VINA Corporation for the review period running from September 1, 2023, through August 31, 2024. The determination was published in the Federal Register on September 17, 2026, as FR Doc. 2026-19091, under case number A-552-817, and is applicable as of that date. Commerce concluded that SeAH VINA sold the merchandise in the United States at less than normal value during the period of review.

Background and legal basis

The review was conducted by the International Trade Administration’s Enforcement and Compliance unit under section 751(a)(1)(B) of the Tariff Act of 1930, as amended. The underlying antidumping duty order on OCTG from Vietnam dates to 2014, when Commerce published it at 79 FR 53691 (September 10, 2014) and corrected it at 79 FR 59740 (October 3, 2014).

Commerce published its preliminary results on March 16, 2026, and invited comments. The final notice states that Commerce made changes to the weighted-average dumping margin calculation for SeAH VINA after reviewing the record and the arguments filed. The issues raised by the parties are addressed in a concurrent Issues and Decision Memorandum, which covers six topics: the choice of surrogate country, surrogate financial ratios, the valuation of hot-rolled coil using market economy purchases, the inclusion of interest expenses in further manufacturing costs, a ministerial error, and adjustments to the differential pricing analysis.

Procedural timeline

• March 16, 2026: Commerce publishes the preliminary results of the 2023-2024 administrative review.
• April 6, 2026: Case briefs filed by SeAH VINA and by Axis Pipe and Tube, Borusan Pipe US Inc., Vallourec Star and Welded Tube USA, Inc., collectively the domestic interested parties.
• April 13, 2026: SeAH VINA and the domestic interested parties submit rebuttal briefs.
• July 10 to September 4, 2026: Commerce extends the deadline for the final results by 59 days, setting the deadline at September 11, 2026.
• September 11, 2026: The final results are signed by Christopher Abbott, Deputy Assistant Secretary for Policy and Negotiations, performing the non-exclusive functions and duties of the Assistant Secretary for Enforcement and Compliance.

Margins and cash deposit rates

Commerce determined a single estimated weighted-average dumping margin for the period: 15.52 percent for SeAH VINA. Because that margin is not zero or de minimis, Commerce calculated importer-specific assessment rates based on the ratio of dumping to entered value, or per-unit rates where entered values were unavailable.

The cash deposit requirements take effect for all shipments of the subject merchandise entered, or withdrawn from warehouse, for consumption on or after publication:

• SeAH VINA: the cash deposit rate equals the 15.52 percent margin.
• Previously investigated or reviewed Vietnamese and non-Vietnamese exporters with a separate rate in a prior segment: the exporter-specific rate from the most recently completed segment in which the exporter was reviewed.
• Vietnamese exporters without a separate rate: the Vietnam-wide entity rate of 111.47 percent.
• Non-Vietnamese exporters without their own rate: the rate applicable to the Vietnamese exporter that supplied the merchandise.

These requirements remain in effect until further notice.

Assessment and next steps

U.S. Customs and Border Protection will assess antidumping duties on all appropriate entries covered by the final results. Under Commerce’s automatic assessment practice, instructions will direct CBP not to liquidate relevant entries until the time for parties to file a request for a statutory injunction has expired, within 90 days of publication. Commerce intends to disclose its calculations to interested parties within five days of the public announcement or of publication.

The notice also reminds importers of their obligation under 19 CFR 351.402(f)(2) to certify reimbursement of antidumping duties before liquidation, warning that failure to comply can lead to a presumption of reimbursement and the assessment of double duties. Parties subject to an administrative protective order are reminded to return or destroy proprietary information.

The final results lock in the duty treatment of Vietnamese OCTG for the 2023-2024 period and reset the deposit rates that importers must pay on future entries, with the 111.47 percent Vietnam-wide rate keeping a sharp penalty on exporters that have not obtained separate treatment. The decision follows a decade-old order that remains a central instrument of U.S. trade defense for the steel pipe sector.

Source: Federal Register, September 17, 2026, section I (official reference: FR Doc. 2026-19091, A-552-817).