Flame path Defected for flameproof enclosure.
"Exd (flameproof) is a type of protection where the enclosure can withstand the effects of an internal explosion without damage. Exd enclosures tested and certified with its associated circuits (internal components ) to ensure that the enclosure will withstand the expected explosion from its internal components."
Reference IEC 60079-1
according to these data I have to replace both the enclosure and internal components to avoid invalidation of the certificate.
Is that Right approach?