Answer Posted / swapnilsd

Flame proof or explosion proof intruments are used for
avoiding explosion and avoiding posibilities of short
circuit in highly flamable & explosive area.In this case
flamable media probably being gas,so flamable & explosive
gases catches fire in electric field.
Fire proof instruments are used for protection due to any
type of fire.
So,finally I would say that flame proof/explosion proof
instruments must be fire proof,but out of explosive or
flamable area we can use only fire proof instruments,there
is no need of flameproof instruments.

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