Contents 17.1 Introduction 17.2 Oil mist in crankcases 17.3 Explosion effects 17.4 Incidence of crankcase explosions 17.5 Prevention of explosions 17.6 Design aspects 17.7 Explosion relief valves 17.8 Crankcase monitoring systems 17.9 Oil mist detectors 17.9.1 Graviner systems 17.9.2 Schaller Visatron systems 17.9.3 Location of sampling points 17.10 Practical aspects References 21761_17