LEHIGH VALLEY , Pa . , May 19 / PRNewswire-FirstCall / -- Air Products ( NYSE : APD ) today announced that its wholly-owned subsidiary , Air Products Brasil , has built , placed on stream , and is operating an air separation plant that provides nitrogen and oxygen for Guardian Industries ' new float glass manufacturing plant in Tatui , Sao Paulo , Brazil . Air Products Brasil is also supplying hydrogen , via an on-site plant , and a Cleanfire ( R ) HRi ( TM ) burner system for Guardian 's new float glass line .