These Fluids are used for Hydraulic systems which are likely to be used in hazardous areas, where there is a possibility of the fluid catching fire, if it gushes out of pipes or leaks through while in operation. These fluids have sufficient fire resisting properties, but they have many drawbacks as compared to petroleum base fluids. Hence, a lot of points have to be considered for designing these systems, also during operation and maintenance of these systems. The characteristics of various types of fire resistant fluids are very much different from each other. Hence, these should be understood and taken care of during application.