The transfer will be completed by July 31, the company said.
"This tentative decision has been made to reflect market conditions and to consolidate technical and manufacturing resources for more efficient production," Dr. Leopold von Heimendahl said. "We remain committed to the development of the tubing business and customer needs in North America."
The Parkersburg plant manufactures borosilicate glass tubing for pharmaceutical packaging and industrial applications. The former Corning Glass plant, here since the 1940s, was purchased by the SCHOTT Corp. in May 1994. The parent company is the SCHOTT Group of Mainz, Germany.
No other plants in the United States are closing.
Production will go to plants in Germany, Spain and Brazil while marketing, sales and logistics will remain in the United States, the company said in a statement issued Thursday morning.