ASTM E476 PDF

Standard Test Method for Thermal Instability of Confined Condensed Phase Systems (Confinement Test) (Withdrawn 2008)

ASTM E476 – Standard Test Method for Thermal Instability of Confined Condensed Phase Systems (Confinement Test) (Withdrawn 2008)

1.1 This test method is designed to determine the temperature at which a chemical or mixture of chemicals, confined initially as a solid or liquid in air or other controlled atmosphere under normal laboratory conditions, will start a reaction, generating appreciable heat when subjected to a programmed temperature increase. This test method is also designed to measure the magnitude and rate of heat generation.

1.2 This test method is for use with condensed phases.

1.3 This test method can be used over a temperature range from 0 to 500^oC, and a pressure range of 0 to 5000 psi.

1.4 As with any thermal stability test, proper safety precautions should be instituted to protect personnel. See also Section 6.

1.5 Limitations

1.5.1 The threshold temperature determined by this method may be higher than one determined by heating at a lesser rate.

1.5.2 Samples of the same material having different thermal histories may have different threshold temperatures.

1.6 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.