In late 1945 , shortly after the war , the Western Pipe & Steel Company was sold for a sum in excess of $ 6.2 million to Consolidated Steel of California , which in turn sold the assets for $ 8.3 million to Columbia Steel , a division of US Steel , in 1948 . Columbia Steel transferred the assets to a new division , Consolidated Western Steel , which was later merged into the parent company , U.S. Steel . Consolidated Western continued to manufacture pipes at facilities in Maywood and South San Francisco , including the material used in a gas transmission pipeline which ruptured in San Bruno in 2010
ruptured in San Bruno in 2010
San Bruno pipeline explosion
Western Pipe and Steel Company