The new symbols for hybrid (water and inert) fire-extinguishing systems, which are a component of a new NFPA Standard 770, Hybrid Extinguishing Systems, are among the important details provided by NFPA 170 to designers, engineers, architects, and emergency planners. This standard offers symbology for emergency evacuation plans and diagrams as well as emergency management mapping. Included in the 2024 edition are: The updated fire-extinguishing system symbols for hybrid (water and inert) systems New symbols for hangers, pipelines, valves, control devices, and oxygen and fuel gas detectors Emergency Communication Radio Enhancement Systems (ECRCES) include a new unified table of symbols.
