Global Processing

Rupture Caused Washington Refinery Blast That Killed Seven

June 14, 2010
The chief official investigating a Washington state refinery explosion that killed seven people says the blast occurred when a heat exchanger ruptured on a unit that processes a highly flammable chemical, reports the Associated Press. Robert Hall, of the U.S. Chemical Safety and Hazard Investigation Board, said Thursday that it''s not yet known why the device ruptured April 2 at Tesoro Corp.''s Anacortes refinery. Metallurgical tests will begin Friday at a laboratory in Cleveland. Tesoro said Thursday that the facility will remain closed at least through September. The company previously said the refinery would be closed through June, but spokesman Lynn Westfall says it will take months to clean the burned area and repair the damaged equipment.