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The maximum internal pressure developed during the ignition of the explosive mixture with air within the encapsulation is directly dependent on the volume released through clearances or other discharge devices, if present. Consequently, the increase in explosion pressure must be correlated with the study of explosion-proof joints to prevent the transmission of the explosion through clearances to the ambient atmosphere. Through a comparison of defects observed during dynamic explosion tests and checks with static overpressure, a safety factor simulating the explosion demands has been identified. By checking the static overpressure at a certain pressure increase factor, the encapsulations are no less stressed than during an explosion. It has been determined that an overpressure increase factor of 1.5 times above the maximum reference explosion pressure value, during hydrostatic testing, ensures the mechanical stress of the encapsulation equivalent to the stresses resulting from overpressure through explosion. This paper presents the mechanical stress simulation of the explosion-proof encapsulation with a cylindrical frame using the SOLIDWORKS application. [ABSTRACT FROM AUTHOR]