Predicting Flammable Material Classifications for the Selection of Electrical Equipment

There is a need for a reliable method of assigning group classifications to mixtures of flammable gases and liquids not covered by Section 500-2 of the National Electrical Code. A method of predicting group classifications for single components has been developed, and a procedure for extending this method to mixtures is suggested. If this procedure can be verified, a new tool will be available which will allow more accurate classification of the hazardous materials in process plants.