Installation of arrester

[selmagis]

You could find many info about on:

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[explosion]

Yes, this is often part of the exhaust system, but: a flame arrester cannot stop sparks so this is used in combination.
I was working in the standards committee for EN 12874 but the standard (already replaced by ISO 16852) gave no further information.
Vent of the crankhouse is also an issue to take into account !