After an explosion a fire in vented installations is not uncommon. This is particularly common if explosion doors do not close after operation.
To avoid further damage by a post-explosion fire, fire protection systems are installed (Aquasafe, powder, CO2, Argonite, FM200, etc.). The choice of the fire suppressant is based on the product properties. The fire is detected early during its development using temperature sensors which are unaffected by pollutants and will automatically extinguish the fire.