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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 845131 - Two Employees Killed In Gas-Fired Boiler Explosion

Accident: 845131 -- Report ID: 0521100 -- Event Date: 11/05/1990
InspectionOpen DateSICEstablishment Name
10305290811/05/19902819Aldrich Chemical Company, Inc.

At approximately 12:48 a.m. on November 5, 1990, Employees #1 and #2 were attempting to diagnose a problem with a gas-fired boiler which was functioning as a back-up (set up to start automatically when the first boiler couldn't keep up). While draining water from the boiler, the two employees were standing between the two boilers. An explosion occurred, killing both of them. A selector switch that had been installed incorrectly by another employee caused the boiler chamber to fill with natural gas prior to pilot light ignition. The operator failed to follow start-up procedures established by the installer.

Keywords: pilot light, repair, flammable vapors, work rules, boiler, natural gas, explosion

Employee Details
Employee # Inspection Age Sex Degree Nature Occupation
1 103052908 Fatality Other Occupation not reported
2 103052908 Fatality Other Occupation not reported

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