WASHINGTON, Oct. 23, 2014 /PRNewswire-USNewswire/ — The United Steelworkers (USW) union has joined a petition calling on the U.S. Commerce Department (DOC) and International Trade Commission (ITC) to impose antidumping and countervailing duties on welded API line pipe imports from South Korea and Turkey. The union, along with steelmakers American Cast Iron Pipe Co., Energex,.. read more →