A ruling body at the World Trade Organization on Wednesday upheld a decision requiring China to review its antidumping duties on some steel pipes made in Japan and the European Union.

The WTO Appellate Body rejected Beijing's claim that its steel makers were damaged by cheap imported seamless stainless steel tubes, saying the tubes — which are often used at coal-fired power plants — are more advanced than China's own products and therefore do not compete.

Since November 2012, China has imposed a tariff of 10 percentage points above normal tax rates on pipes supplied by Japan's two biggest steel producers, Nippon Steel & Sumitomo Metal Corp. and JFE Holdings Inc., as well as products made by European steel makers.