OREGON STEEL BUYS KAISER'S NAPA VALLEY PLANT Kaiser Steel Corp's plant in Napa, Calif, has been purchased by Oregon Steel Mills for 16 mln dlrs, the privately owned Portland company said. The transaction was approved by the U.S. bankruptcy judge in Denver who is hearing Kaiser Steel's Chapter 11 reorganization case. James Mccaughey, former vice president of sales for Kaiser, has been named general manager for the plant, which will be called Napa Pipe Corp, Oregon Steel said.