Protective apparatus in the nature of explosion prevention and mitigation, namely, explosion isolation valves, diverters and barriers, explosion resistant structures, explosion relief vents, explosion detectors, explosion suppressors, explosion extinguishers, spark detectors, spark extinguishers, temperature monitors, and gas monitors, all for use in installations with danger of explosion

protective apparatus, namely, electric explosion proof equipment, explosion suppression equipment, explosion panels, explosion compartmentation equipment for installations with danger of explosion