Heavy Walled Rectangular Welded Carbon Steel Pipes and Tubes From the Republic of Korea: Final Results of the Antidumping Duty Administrative Review; 2023-2024

Document Headings Document headings vary by document type but may contain the following: the agency or agencies that issued and signed a document the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to the agency docket number / agency internal file number the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Department of Commerce International Trade Administration [A-580-880] AGENCY: Enforcement and Compliance, International Trade Administration, Department of Commerce. SUMMARY: The U.S. Department of Commerce (Commerce) determines that heavy walled rectangular welded carbon steel pipes and tubes from the Republic of Korea (Korea) were not sold at less than normal value during the period of review (POR) September 1, 2023, through August 31, 2024. DATES: Applicable September 21, 2026. FOR FURTHER INFORMATION CONTACT: Kayden Jenson, AD/CVD Operations, Office II, Enforcement and Compliance, International Trade Administration, U.S. Department of Commerce, 1401 Constitution Avenue NW, Washington, DC 20230; telephone: (202) 482-0967. SUPPLEMENTARY INFORMATION: Background On March 20, 2026, Commerce published the Preliminary Results of this administrative review and invited comments from interested parties. [ 1 ] This review covers two companies: HiSteel Co., Ltd. (HiSteel) and Dong-A-Steel Co., Ltd. (DOSCO). On April 10, 2026, we received case briefs from Nucor Tubular Products Inc. (the petitioner). [ 2 ] On August 17, 2026, we received case briefs from HiSteel, DOSCO, and Kukje Steel Co., Ltd. (Kukje Steel). [ 3 ] On August 24, 2026, we received rebuttal comments from HiSteel, DOSCO, and the petitioner. [ 4 ] On July 8, 2026, Commerce extended the deadline of these final results by 53 days, until September 9, 2026. [ 5 ] On September 1, 2026, Commerce again extended the deadline of …