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.     

Cable Tray Installation for Process Plants

The function of a tray system in a process plant is to provide an efficient wiring method for power, lighting, instrumentation, communications, and grounding. This paper reviews tray system design, material selection, installation, and problem areas. The presentation is based on experience in the design and installation of complete tray systems for oil refineries, chemical plants, and power plants.