ASTM E1231-19
Standard Practice for Calculation of Hazard Potential Figures of Merit for Thermally Unstable Materials

Standard No.

ASTM E1231-19

Release Date

2019

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM E1231-19

Scope

1.1 This practice covers the calculation of hazard potential figures of merit for exothermic reactions, including: (1) Time-to-thermal-runaway, (2) Time-to-maximum-rate, (3) Critical half thickness, (4) Critical temperature, (5) Adiabatic decomposition temperature rise, (6) Explosion potential, (7) Shock sensitivity, (8) Instantaneous power density, and (9) National Fire Protection Association (NFPA) 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 values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.7 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM E1231-19 Referenced Document

• ASTM C177 Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus
• ASTM C518 Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus
• ASTM E1269 Standard Test Method for Determining Specific Heat Capacity by Differential Scanning Calorimetry
• ASTM E1952 Standard Test Method for Thermal Conductivity and Thermal Diffusivity by Modulated Temperature Differential Scanning Calorimetry
• ASTM E2041 Standard Method for Estimating Kinetic Parameters by Differential Scanning Calorimeter Using the Borchardt and Daniels Method
• ASTM E2070 Standard Test Methods for Kinetic Parameters by Differential Scanning Calorimetry Using Isothermal Methods*， 2023-10-01 Update
• ASTM E2716 Standard Test Method for Determining Specific Heat Capacity by Modulated Temperature Differential Scanning Calorimetry*， 2023-01-01 Update
• ASTM E2890 Standard Test Method for Determination of Kinetic Parameters and Reaction Order for Thermally Unstable Materials by Differential Scanning Calorimetry Using the Kissinger and Farjas Methods*， 2021-10-01 Update
• ASTM E473 Standard Terminology Relating to Thermal Analysis
• ASTM E537 Standard Test Method for Assessing the Thermal Stability of Chemicals By Methods of Thermal Analysis
• ASTM E698 Standard Test Method for Arrhenius Kinetic Constants for Thermally Unstable Materials
• ASTM E793 Standard Test Method for Enthalpies of Fusion and Crystallization by Differential Scanning Calorimetry

ASTM E1231-19 history

• 2019 ASTM E1231-19 Standard Practice for Calculation of Hazard Potential Figures of Merit for Thermally Unstable Materials
• 2015 ASTM E1231-15 Standard Practice for Calculation of Hazard Potential Figures of Merit for Thermally Unstable Materials
• 2010 ASTM E1231-10 Standard Practice for Calculation of Hazard Potential Figures-of-Merit for Thermally Unstable Materials
• 2001 ASTM E1231-01(2006) Standard Practice for Calculation of Hazard Potential Figures-of-Merit for Thermally Unstable Materials
• 2001 ASTM E1231-01e1 Standard Practice for Calculation of Hazard Potential Figures-of-Merit for Thermally Unstable Materials
• 2001 ASTM E1231-01 Standard Practice for Calculation of Hazard Potential Figures-of-Merit for Thermally Unstable Materials
• 1996 ASTM E1231-96a Standard Practice for Calculation of Hazard Potential Figures-of-Merit for Thermally Unstable Materials