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ASTM-E2019:2007 Edition

ASTM-E2019:2007 Edition

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E2019-03(2007) Standard Test Method for Minimum Ignition Energy of a Dust Cloud in Air

Published By Publication Date Number of Pages
ASTM 2007 8
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1.1 This test method determines the minimum ignition energy of a dust cloud in air by a high voltage spark.

1.2 The Minimum Ignition Energy (MIE) of a dust-cloud is primarily used to assess the likelihood of ignition during processing and handling. The likelihood of ignition is used to evaluate the need for precautions such as explosion prevention systems. The MIE is determined as the electrical energy stored in a capacitor which, when released as a high voltage spark, is just sufficient to ignite the dust cloud at its most easily ignitable concentration in air. The laboratory test method described in this standard does not optimize all test variables that affect MIE. Smaller MIE values might be determined by increasing the number of repetitions or optimizing the spark discharge circuit for each dust tested.

1.3 In this test method, the test equipment is calibrated using a series of reference dusts whose MIE values lie within established limits. Once the test equipment is calibrated, the relative ignition sensitivity of other dusts can be found by comparing their MIE values with those of the reference dusts or with dusts whose ignition sensitivities are known from experience. X1.1 of this test method includes guidance on the significance of minimum ignition energy with respect to electrostatic discharges.

1.4 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. Specific precautionary statements are given in 8

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Terminology
Summary of Test Method
2 Significance and Use
Interferences
Apparatus
Safety Precautions
3 Sampling
Calibration and Standardization
FIG. 1
FIG. 2
4 Procedure
FIG. 3
FIG. 4
5 Report
Precision and Bias
Keywords
X1. EXAMPLES OF SPARK GENERATING SYSTEMS
X1.1
X1.2
X1.3
FIG. X1.1
6 X1.4
X1.5
FIG. X1.2
FIG. X1.3
FIG. X1.4
7 X2. SIGNIFICANCE OF MINIMUM IGNITION ENERGY
X2.1
X2.2
X2.3
X2.4
X2.5
X2.6
X2.7
X2.8
X2.9
X2.10
X2.11
TABLE X2.1
8 X2.12
X2.13
X2.14
X2.15
X2.16
REFERENCES

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