At 7:00 a.m. on June 6, 2019, an employee was changing an "O" ring on a sight glass for a heat sensor on a 3-inch pipe on line #9 in the central clean-in-place room. The employee was changing the gasket when residual hot water and chemical mix in the line that had not been properly drained and isolated sprayed out onto him. The employee sustained second degree burns and was hospitalized.
Source: OSHA.gov
Employees #1 and #5 through #7 were near the chlorine unloading area at a bleach plant when the gasket of a recently-installed vaporizer failed, releasing between 500 and 700 gallons of liquid chlorine. When Employees #1 and #7 went to investigate the extent and location of the leak, they found an overwhelming concentration of the chemical. They were not using SCBAs, nor was Employee #6, who used the wrong escape route. Employee #5, the bleach plant operator, attempted to find and assist Employee #6. Employees #2 through #4 attempted to shut down the vaporizer system but they did not know the location of the one critical shut-off valve, and the key person was not immediately available to help. Employees #1 through #7 suffered chemical burns from inhaling the chlorine fumes; all were hospitalized except for Employee #2. Source:OSHA.gov
Employee #1, a millwright, was standing near a 100 ft long by 5 ft diameter vacuum fat-splitter vessel that was undergoing a hydrostatic test. He was by the M-1 flange joint when the gasket experienced a catastrophic failure. Employee #1 was struck in the face by air and water released at the maximum allowable working pressure of 1,275 psig. He was killed.
Source:OSHA.gov
On October 6, 1994, an employee, working in the surgical wing at the Hospital, was exposed to ethylene oxide gas from the sterilizer room. The monitor in the sterilizer room read 77 ppm. The solenoid from the boiler had failed, and a bad gasket released the gas throughout the surgical wing. Three nurses and one maintenance employee who was performing daily routine maintenance were also exposed. Hospital employees participated in an emergency response until the fire department arrived on site. None of the exposed employees required hospitalization.
(EO is used as a sterilizing agent in hospitals)
Source: OSHA.gov