The U.S. International Trade Commission on Friday issued a final ruling backing allegations that seamless steel pipes imported from Japan are hurting the U.S. industry.

The ruling paves the way for the U.S. Commerce Department to levy antidumping duties corresponding to the dumping margins it has set.

The margins were set at 107.80 percent for large-diameter seamless steel pipes imported from Nippon Steel Corp., Kawasaki Steel Corp. and Sumitomo Metal Industries Ltd., and 68.88 percent for all other Japanese makers.

They were also set at 106.07 percent for small-diameter seamless steel pipes imported from Nippon Steel, Kawasaki Steel and Sumitomo Metal Industries, and 70.43 percent from all other makers.