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Purge or bang? Any help out there?

Purge or bang? Any help out there?

Purge or bang? Any help out there?

(OP)
Purge of bang? In an enclosed diesel engine acoustic module, diesel fuel with a flashpoint above 61 deg C falls on hot surface say 70 deg C. Ambient air temperature is 40 deg C. There is no purge or air change. I think the diesel fuel will evolve flammable vapours and eventually reach the LEL and we have a bang waiting to happen. The vapours will not condense back into diesel fuel once they have flashed off - we have basically refined the product and are now looking at the volatile fractions of the fuel - benzoates etc - and so we have a totally different set of characteristics to that of the original diesel.
Is there a hazard here that needs mitigation or am I wrong?
My view is that a continuous purge of the module is required to prevent the formation of an explosive atmosphere in the first place. Your input please.

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