LINE #7 WAS SWITCHED OVER TO BURNING COAL DURINGTHE 3RD SHIFT ON 11/2/00 AT 9:15PM THE BURNER FLOOR ATTENDANT HEARD A LOUD BANG FROM LINE7. UPONS INVESIGATION HE FOUND A 1' DIAMETER 4' LON G SECTION OF FLEX STEEL PIPE HAD BLOWN APART FROM THE COAL BURNER FEED PIPE. THE COAL SYSTEM & LINE #7 WERE SHUTDOWN IMMEDIATELY