The WTO said it had been notified by South Korea that it was requesting consultations on the US anti-dumping measures.
Seoul charged that the measures and US methodology for calculating prices and values were counter to a range of global trade rules, WTO said.
The move came in response to a US decision in July to impose duties of up to 16 percent on South Korean steel pipes and tubes used for oil drilling, Dow Jones Newswires reported.
The consultations, which allow the parties to discuss the matter and reach a solution without proceeding to litigation, must begin within 30 days and generally cannot last longer than two months.
If they fail to reach an agreement, the complainant can request that a panel of experts be established to study the dispute and reach a verdict.
Earlier this year, South Korea also called on the WTO to settle a dispute with Washington over duties it imposes on imported washing machines.