MANASSAS, Virginia, May 22 (Reuters) - U.S. Trade Representative Jamieson Greer said on Friday that there were no imminent U.S. tariffs expected to be imposed on semiconductors but that it was important to protect the sector with duties to facilitate reshoring of chip production.

Greer, speaking at a Micron Technology memory chip plant expansion project in the Washington, DC suburbs, said that any tariffs USTR's long-awaited Section 232 national security investigation aimed at protecting the U.S. semiconductor sector needed to be properly sequenced to promote U.S. output.

"So, having tariffs on semiconductors is really important. What's even more important than having protection for facilities like this, is making sure we do it on the right timing and in the right amount," Greer said.

"There was not an immediate tariff coming," he said.