Testing methods autoignition test

Some of the tests and criterion used to define fire resistance may be found in the Hterature (9). Additionally, the compression—ignition and hot manifold tests as defined in MIL-H-19457 and MIL-H-5606, respectively the Wick test as defined by Federal Standards 791, Method 352 flash point and fire point as defined in ASTM D92 autoignition temperature as defined in ASTM D2155 and linear flame propagation rate are defined in ASTM D5306 are used. 

Tables 16 and 17 Hst tke analytical test methods for different properties of interest. The Manufacturing Chemists Association, Inc. (MCA) has pubUshed the Chemical Safety Data Sheet SD 63, which describes in detail procedures for safe handling of use of toluene (46). The Interstate Commerce Commission classifies toluene as a flammable Hquid. Accordingly, it must be packaged in authorized containers, and shipping must comply with ICC regulations. Properties related to safe handling are autoignition temperature, 536°C explosive limits, 1.27—7.0 vol % in air and flash point 4.4°C, closed cup.

ASTM E 659, Standard Test Method for Autoignition of Liquid Chemicals, American Society for Testing and Materials, Philadelphia, Pennsylvania, 1978. 

These, as yet barely tested, methods are intuitive approaches to the problem of handling complex mechanisms in complex mixtures. More systematic methods are described in Chapter 4, although they have not yet been extensively applied to autoignition. It is clear that brute force methods for integration of chemical reaction schemes would be severely challenged when confronted with mixtures like gasoline in which there are several hundred components, each with an oxidation mechanism of several thousand elementary reactions. Of course, there will be considerable overlap of these mechanisms, but even so the computational effort that would be involved seems barely justified by the uncertainties in the rate constants of the tens of thousands reactions that would be necessary. More elegant methods are needed. 

ASTM E 659-94. Standard test method for autoignition temperature of liquid chemicals. 

Standard Test Method for Constant-temperature Stability of Chemical Materials Standard Test Method for Arrhenius Kinetic Constants for Thermal Un.stable Materials Standard Test Method for Rapid Thermal Degradation of Solid Electrical Insulating Materials by Thermogravimetric Method Standard Test Method for Autoignition Temperature of Liquid Chemicals Standard Test Method for Specific Heat of Aircraft Turbine Lubricants by Thermal Analysis Standard Test Method for Linear Thermal Expansion of Solid Materials by Thermodilatometry... 

The lowest temperature at which a material will ignite and sustain combustion in the absence of a spark or flame. The properties of liquid can be tested by standardized methods (ASTM E659-78 (2005) Standard Test Method for Autoignition Temperature of Liquid Chemicals). The ignition temperature is the temperature in degrees Centigrade at which the substance shows spontaneous combustion when touching hot bodies. 

E 659 Test Method for Autoignition Temperature of Liquid Chemicals ... 

Note 4 Warning—Do not perform this test with air at temperatures in exces of the autoignition temperature of the test specimen as determined by Test Method E 659 or Test Method D 2883, or both. 

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