BS EN 13237:2024 Potentially Explosive Atmospheres
 
The document provides standardized definitions and vocabulary covering practical explosion-protection concepts, for example:
Basic environmental parameters: ambient atmosphere and ambient temperature; atmospheric conditions (80 kPa to 110 kPa; −20 °C to +60 °C).
Combustible materials: definitions for combustible dust (particles ≤ 500 µm), conductive and non‑conductive dust, and combustible flyings.
Hazard and event terminology: explosion, deflagration, detonation, explosion region, LEL / UEL (lower/upper explosion limits), explosion pressure (pex).
Equipment classification and Ex concepts: Ex Equipment, Ex Component, equipment grouping, and degree of protection (IP).
Ignition protection and control: constructional safety (“c”), control of ignition source (“b”), control measures (automatic and manual), ignition prevention devices/systems, safety devices.
Explosion mitigation systems: explosion isolation (active/passive), explosion diverters, explosion isolation flap valves.
References to applicable test methods and terminology sources (IEC Electropedia, ISO OBP).