ASTM E659 PDF

More E The autoignition temperature by a given method does not necessarily represent the minimum temperature at which a given material will self-ignite in air. The volume of the vessel used is particularly important since lower autoignition temperatures will be achieved in larger vessels. See Appendix X2. Vessel material can also be an important factor.

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More E The autoignition temperature by a given method does not necessarily represent the minimum temperature at which a given material will self-ignite in air. The volume of the vessel used is particularly important since lower autoignition temperatures will be achieved in larger vessels. See Appendix X2. Vessel material can also be an important factor. These temperatures can be expected to vary with the test pressure and oxygen concentration. For such materials, ignition is dependent upon the thermal and kinetic properties of the decomposition, the mass of the sample, and the heat transfer characteristics of the system.

No condensed phase, liquid or solid, should be present when ignition occurs. Such materials will thermally degrade in the flask and the accumulated degradation products may ignite. Responsibility for extension of this test method to solids of unknown thermal stability, boiling point, or degradation characteristics rests with the operator. Scope 1. See also Appendix X2. However, results of this test may be used as elements of a fire risk assessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular end use.

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The autoignition temperature by a given method does not necessarily represent the minimum temperature at which a given material will self-ignite in air. The volume of the vessel used is particularly important since lower autoignition temperatures will be achieved in larger vessels. See Appendix X2. Vessel material can also be an important factor. These temperatures can be expected to vary with the test pressure and oxygen concentration. For such materials, ignition is dependent upon the thermal and kinetic properties of the decomposition, the mass of the sample, and the heat transfer characteristics of the system. No condensed phase, liquid or solid, should be present when ignition occurs.

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