On May 29, 2018, the US International Trade Commission (USITC) made a second final anti-dumping and countervailing sunset review of the industry's circular anti-dumping and countervailing oil imports from China's circular welded carbon steel pipe (Circular Welded Carbon-Quality Steel Pipe): During the foreseeable period, if the anti-dumping duties of the products involved are canceled, the substantial damage caused by the import of the products involved in the US domestic industry will continue or reoccur. In the ruling, all four members voted for a positive vote. According to the above affirmative ruling, the current anti-dumping and countervailing measures against China's ring-shaped welded carbon steel pipe will continue to be effective.

On July 5, 2007, the US Department of Commerce conducted anti-dumping and countervailing investigations on ring-shaped welded carbon steel pipes imported from China. On May 30, 2008, the US Department of Commerce made an anti-dumping and counter-subsidy final ruling on ring-shaped welded carbon steel pipes imported from China. On June 3, 2013, the United States conducted the first anti-dumping and countervailing rapid sunset review investigation on the ring-shaped welded carbon steel pipe imported from China. On October 2, 2013, the US Department of Commerce made an anti-dumping and countervailing quick-review final review of the ring-welded carbon steel pipes imported from China. On November 1, 2018, the United States conducted a second anti-dumping and countervailing rapid sunset review of imported ring-shaped welded carbon steel pipes imported from China. On March 25, 2019, the US Department of Commerce made a second countervailing quick-review final review of the ring-welded carbon steel pipes imported from China. On April 16, 2019, the US Department of Commerce made a second anti-dumping and rapid sunset review of the ring-welded carbon steel pipes imported from China.