Dust and gas hazards both require area classification, but dust layers, hybrid mixtures, and housekeeping rules add site-specific complexity beyond equipment marking alone.
This article highlights considerations for Spare Parts Strategy for Long-Life Ex Assets under maintenance programs themes. It is educational and not a substitute for project-specific standards, certificates, or AHJ rulings.
Canadian installations reference similar concepts in the CEC; always confirm edition year and provincial amendments.
Temperature class (T-code) and maximum surface temperature must remain below the ignition temperature of the process gas or dust cloud and layer, including fault conditions where required.
Training competent persons for inspection and maintenance is as important as selecting certified hardware.
Map your equipment EPL and type of protection to the classified area, then verify installation conditions of use, cable entries, grounding, and maintenance intervals. Keep declarations and certificates version-controlled.
Book a consultation with HazloLabs when markets or standards change mid-project—early alignment saves retest cycles.