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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 707851 - One Employee Killed, One Injured When Sight Glass Ruptures

Accident: 707851 -- Report ID: 0352420 -- Event Date: 04/09/1986
InspectionOpen DateSICEstablishment Name
281233704/10/19862842Cello Corporation
On April 9, 1986, Employees #1 and #2 were tightening a manhole cover plate on a 1,000 gallon capacity steam jacketed pressure vessel. The vessel was in service, agitating and heating a wax emulsion product by a pressure emulsion process when a 4 in. diameter, 3/4 in. thick sight glass ruptured. It threw out an explosion-proof light that was mounted over the sight glass and broke a 1 in. diameter steam line. Employee #1 was killed and Employee #2 was burned by steam and the hot wax emulsion product. The pressure relief valve on the 75 psi vessel was rated at 150 psi and was not operational. No maintenance or vessel inspection documentation could be located. An apparent violation of State of Maryland article 89, annotated code of Maryland, section 32 (a) (general duty clause) was cited.
Keywords: steam line, safety relief valve, broken glass, inadequate maint, pressure vessel, work rules, rupture, steam, high pressure, high temperature
Employee # Inspection Age Sex Degree Nature Occupation
1 2812337 Fatality Burn/Scald(Heat) Mixing and blending machine operators
2 2812337 Non Hospitalized injury Burn/Scald(Heat) Machine operators, not specified

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