When a hazard involves a lot of energy or aggressive chemicals, your face may be at risk as well as your eyes. Also, Z87.1 or Z81+ rated eye protection may not be adequate to protect your eyes, so additional protection might be prudent. If you could injure your face in an accident, use a face shield to protect your face – learn more in High energy facial protection.
Chemical hazards require eye protection specifically designed for chemical hazards. Many chemicals can cause serious damage or irritation when they get into your eyes. These include, but are not limited to, acids, caustics and solvents. When working with chemical eye hazards, wear chemical splash goggles to protect your eyes – learn more in Chemical Hazard Eye Protection.
A pair of undergraduates in a chemistry class loaded a pressure vessel (a “Parr bomb”) with reactants and placed the vessel in a furnace, leaving the reaction to run for the night.
Several hours later, during an evening class in the same lab, an unanticipated reaction occurred in the vessel. This raised the pressure beyond the established safe operating limit for the experiment and burst the vessel’s safety rupture disc. The class heard a loud bang followed by a strong odor described as “microwaved broccoli.”
The instructor evacuated the lab. Because procedures were not clear, a delay followed before anyone contacted Security and Health, Safety & Environment. Once the authorities were notified, the laboratory was inspected for damage, and ventilation was increased to remove the odor (which had spread throughout the floor).
Learn more about this incident in Incident pressure relief UTL Apr2014.
A researcher was attempting to change the acetylene pressure on an atomic absorption spectrometer by adjusting the pressure regulator. He inadvertently set the pressure well above 15psig, despite the signs (and the red markings on the regulator) warning not to do so. When acetylene pressure exceeds 15psi, the gas can liquefy; in this state, acetylene can suddenly and explosively polymerize. Fortunately, this did not occur, although the regulator was ruined from overpressurization.
Learn more about this incident and its implications in Incident Ames Feb2014.