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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 14535439 - One Employee Killed When Pressure Vessel Explodes

Accident: 14535439 -- Report ID: 0830300 -- Event Date: 11/21/1985
InspectionOpen DateSICEstablishment Name
64014411/25/19852911Phillips Petroleum Company - Tioga Gas Plant
An unfired pressure vessel with a 6,500 gallon liquid capacity, which was designed and manufactured to be used for propane gas storage, was being used at this natural gas processing refinery as an accumulator. The tank was subjected to forces greater than those for which it was designed, and it developed severe stress cracks. The tank, operating at approximately 250 psi, failed and exploded. Large quantities of flammable vapors from liquid hydrocarbons were released and ignited, causing a second explosion. Employee #1 was killed by the explosion. A large portion of the refinery was destroyed.
Keywords: flammable vapors, pressure vessel, work rules, fire, natural gas, equipment failure, explosion, high pressure, refinery
Employee # Inspection Age Sex Degree Nature Occupation
1 640144 Fatality Other Occupation not reported

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