Explosion-Proof Strip Heaters UL listed for use in Div I, Class I, Groups B, C, D; Class II, Groups E, F, G hazardous locations. They are available in a large selection of lengths. These elements have temperature ratings of T3 and T3C. Heaters which are inserted into a solid aluminum body resist damage from rough handling and contact with process materials. These are for use in chemical and petrochemical plants, tanks, large pipes control cabinets, resin handling equipment, aggregate and other bulk handling processes.