U.S. Court Amends Antidumping Duty on Thai Steel Pipes After Long Legal Battle

You might care about this because a U.S. court recently upheld a decision that changes the duty rate on certain steel pipes imported from Thailand. This notice from the Department of Commerce explains the final outcome of a long legal review. The review covered circular welded carbon steel pipes and tubes from Thailand, specifically for the period between March 1, 2019, and February 29, 2020. Initially, the Department of Commerce set a dumping margin of 36.97 percent for Saha Thai Steel Pipe Public Co., Ltd. and Thai Premium Pipe Co., Ltd. Saha Thai challenged this decision in court. After several court orders sending the case back to Commerce for more review, a final court judgment was made on July 17, 2026. This judgment supported Commerce's latest findings, which resulted in a revised, lower dumping margin of 14.74 percent for both Saha Thai and Thai Premium. This means the duty rate applied to these companies' products from that specific period has now been formally changed. What makes this legal document particularly interesting is the journey it took through the court system. The case involved multiple remands, which means the U.S. Court of International Trade sent the decision back to the Department of Commerce three separate times for further consideration. Each remand addressed different aspects of Commerce's original findings. For example, the court asked Commerce to re-evaluate how it handled a "cost-based particular market situation adjustment." Later, questions arose about including sales of "dual-stenciled pipe" in the calculations. A significant point of contention was whether two companies, Saha Thai and BNK, were affiliated. Commerce changed its stance on this affiliation issue during the remand process. This shows the careful scrutiny that trade decisions face and how government agencies must justify their reasoning to the court, sometimes even correcting their own prior explanations. The final ruling settles these debates and establishes a definitive duty rate after years of legal back-and-forth. Several groups will find this legal document highly relevant. Companies that import circular welded carbon steel pipes and tubes from Thailand will be directly affected by these duty rates and should pay close attention. Businesses in the steel manufacturing and construction industries, especially those sourcing materials internationally, need to understand these trade regulations. Legal professionals specializing in international trade law, customs law, and administrative law will find this case a valuable example of how antidumping duty reviews are challenged and refined through judicial review. Academics studying international economics or trade policy might also examine this case to understand the practical application of antidumping measures. Finally, any businesses engaged in trade with Thailand, or those interested in how the U.S. government applies trade remedies, will find the details of this long-running dispute informative.