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ASTM-E1231:2006 Edition

ASTM-E1231:2006 Edition

$40.63

E1231-01(2006) Standard Practice for Calculation of Hazard Potential Figures-of-Merit for Thermally Unstable Materials

Published By Publication Date Number of Pages
ASTM 2006 7
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1.1 This practice covers the calculation of hazard potential figures-of-merit for exothermic reactions, including:

Time-to-thermal-runaway,Critical half thickness,Critical temperature,Adiabatic decomposition temperature riseExplosion potential,Shock sensitivity,Instantaneous power density, andNFPA instability rating.

1.2 The kinetic parameters needed in this calculation may be obtained from differential scanning calorimetry (DSC) curves by methods described in other documents.

1.3 This technique is the best applicable to simple, single reactions whose behavior can be described by the Arrhenius equation and the general rate law. For reactions which do not meet these conditions, this technique may, with caution, serve as an approximation.

1.4 The calculations and results of this practice might be used to estimate the relative degree of hazard for experimental and research quantities of thermally unstable materials for which little experience and few data are available. Comparable calculations and results performed with data developed for well characterized materials in identical equipment, environment, and geometry are key to the ability to estimate relative hazard.

1.5 The figures-of-merit calculated as described in this practice are intended to be used only as a guide for the estimation of the relative thermal hazard potential of a system (materials, container, and surroundings). They are not intended to predict actual thermokinetic performance. The calculated errors for these parameters are an intimate part of this practice and must be provided to stress this. It is strongly recommended that those using the data provided by this practice seek the consultation of qualified personnel for proper interpretation.

1.6 The SI units are standard.

1.7 There is no ISO standard equivalent to this practice.

This standard does not purport to address all of the safety concerns, if any, 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.

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
2 Terminology
Summary of Practice
Significance and Use
Interferences
3 Apparatus
Calculation
TABLE 1
4 Report
5 Precision and Bias
6 Keywords
7 REFERENCES

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