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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 170174726 - Asphalt Tank Explodes When Vapors Ignited By Heating Coils

Accident: 170174726 -- Report ID: 0950614 -- Event Date: 11/08/1990
InspectionOpen DateSICEstablishment Name
11182404111/08/19902951Western Colloid
Employee #1 turned on the burner to a 25,000 gallon asphalt tank in an attempt to release a stuck level indicator float. The approximately 600 gallons of asphalt that remained in the tank was not enough to cover the heating coils. As the temperature of the coils reached an estimated 1,000 to 1,200 degrees F, the vapors released from the asphalt ignited. The resulting explosion threw the top of the tank 200 feet, and it crashed through a roof of a company warehouse. No injuries were reported.
Keywords: maintenance, vapor, flammable vapors, work rules, storage tank, jammed, explosion, hot asphalt, flying object, high temperature
Employee # Inspection Age Sex Degree Nature
1 111824041

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