STP1284

    Fire Resistant Hydraulic Fluids and Fire Resistance Test Methods Used by the Air Force

    Published: Jan 1996


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    Abstract

    The concern about the fire resistance of hydraulic fluids by the Air Force and the rest of the Department of Defense (DoD) dates back to the introduction of the mineral oil based hydraulic fluid, MIL-H-5606 [1], into aircraft hydraulic systems. This concern has led to the development of two fire resistant hydraulic fluids that can be directly substituted into aircraft hydraulic systems that were designed to use MIL-H-5606, i.e., MIL-H-83282 [2] and MIL-H-87257 [3], and a nonflammable hydraulic fluid, MTL-H-53119 [4], that can be used only in hydraulic systems that were designed for that fluid or in subsystems originally designed for MIL-H-5606, MIL-H-83282 or MIL-H-87257, for which re-design of the components and retrofit of the system with compatible seals, if required, would be cost effective. Another fire resistant hydraulic fluid was developed for use in commercial aircraft hydraulic systems, a phosphate ester based hydraulic fluid described by Society of Automotive Engineers document AS1241, Fire Resistant Phosphate Ester Hydraulic Fluid for Aircraft The fire resistant properties of these fire resistant and nonflammable hydraulic fluids are discussed and the flammability test methods are presented.

    Keywords:

    flammability, fire resistant hydraulic fluids, Department of Defense


    Author Information:

    Snyder, CE
    Research Materials Engineer, Air Force Wright Laboratory, Materials Directorate, WL/MLBT, Wright-Patterson Air Force Base, OH

    Gschwender, LJ
    Research Materials Engineer, Air Force Wright Laboratory, Materials Directorate, WL/MLBT, Wright-Patterson Air Force Base, OH


    Paper ID: STP16281S

    Committee/Subcommittee: D02.N0

    DOI: 10.1520/STP16281S


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