Casting and smelting facilities need to consider backup power to get molten metal poured or kept hot until processed.

 Certain processes that generate flammable dusts or flammable vapors must be able to evacuate the combustibles to facilitate an orderly and safe shutdown. This could mean that certain “Class A” ovens ― those that create flammable atmospheres such as drying paint ― may need to have ventilation fans on emergency power to remove flammable atmospheres so they do not do not accumulate and become a hazard. 

Related: 10 Tips to Save Your Combustion Equipment During Electrical Outages