ITC keeps light-walled rectangular tube duties in place — into the 2030s
The August 4 sunset vote means the import-cost floor under rectangular mechanical and structural tube from China, Korea, Mexico, and Türkiye stays put for roughly five more years.
The US International Trade Commission voted on August 4, 2026 to maintain the antidumping and countervailing duty orders on light-walled rectangular pipe and tube from China, Korea, Mexico, and Türkiye, concluding the third sunset review of orders that date to 2008. The vote was 3–0, with two commissioners not participating. The determination means the orders continue for approximately five more years — into the early 2030s — unless revoked earlier.
The Commission's finding follows the Commerce Department's expedited determinations, published in January 2026, that dumping would be likely to continue or recur if the orders were revoked.
What "light-walled rectangular" covers, roughly: welded carbon-steel rectangular and square tube with wall thickness below the heavy structural range — a scope that overlaps heavily with the mechanical and light-structural rectangular tube used in racking, furniture, trailers, equipment frames, and general fabrication. Scope questions are decided entry-by-entry; the order language, not this summary, governs.
What it means for buyers:
These duties stack on top of the Section 232 tariff, which currently puts base steel tube at a 50% rate from nearly every origin — Canada and Mexico included (see our buyer's guide → /analysis/section-232-tube-buyers-guide-2026). For rectangular tube from the four order countries, the combined landed-cost penalty is now a structural feature of sourcing math through the rest of the decade, not a policy blip to wait out.
Buyers holding programs supplied from these origins have effectively three moves: re-baseline landed cost and hold, shift origin (noting Canada's own tightened import regime — quota at 20% of 2024 volumes for non-FTA suppliers since December 26, 2025), or develop a domestic route. The third option is the subject of our live investigation → /investigations/can-north-america-make-this-tube.
What to watch: the final continuation notice in the Federal Register (which fixes the formal continuation date), producer-specific cash-deposit rates in Commerce's ongoing administrative reviews, and the separate Taiwan rectangular-tubing review active this year.