Simplifying standards, opening restrictions part II: The significance of the ignition source on the safety characteristics of dusts in the 20 L-sphere

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00007064%3AK02__%2F25%3AN0000105" target="_blank" >RIV/00007064:K02__/25:N0000105 - isvavai.cz</a>

Alternative codes found

RIV/00216275:25310/25:39923493

Result on the web

<a href="https://www.webofscience.com/wos/woscc/full-record/WOS:001382249300001" target="_blank" >https://www.webofscience.com/wos/woscc/full-record/WOS:001382249300001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jlp.2024.105524" target="_blank" >10.1016/j.jlp.2024.105524</a>

Result language

angličtina

Original language name

Simplifying standards, opening restrictions part II: The significance of the ignition source on the safety characteristics of dusts in the 20 L-sphere

Original language description

The ignition behavior of chemical ignitors has been increasingly discussed in conjunction with their influence on the safety characteristics of the dust and hybrid mixture determined in the 20 L-sphere. Specifically, the turbulence generated by the ignitors and/or preconditioning of the system by a large and hot fireball. The effect of the explosion pressure generated by the chemical ignitors is included in the standards by means of the so-called pressure ratio (PR) (ASTM E1226 - 19, 2019; ASTM E1515-14, 2022) or the corrected explosion overpressurepm (ASTM E1226 - 19, 2019; EN 14034-1, 2011). The overpressure caused by the ignitors should also be subtracted when the dusts are tested on their explosibility (ISO 80079-20-2,; EN 14034-3, 2011; EN 14034-4, 2011). The aim of the presented work is to show the weaknesses of the standards in the case of calculation of the corrected overpressure pm and the pressure ratio PR with respect to the chemical ignitors ' explosion overpressure measured in the 20 L-sphere. Measurements of the explosion overpressure of the sole ignitors in the air are presented together with the influence of the dust concentration on the explosion pressures of the ignitors. Talc dust, Lycopodium Clavatum dust and their mixture (80 % by mass of talc and 20 % by mass of Lycopodium) were used for tests in air and nitrogen. The differences in the measured explosion pressures generated by the ignitors in the calculations of the pressure ratio PR and the corrected overpressure pm were compared with calculations using the ignitors explosion overpressure calculated according to equations given by the Standards are shown. The ignition criteria given by three different standards were used as an example of ignition evaluation from the real explosion curves with different ignitors overpressures. The importance of the measurements of the real overpressures caused by the ignitors is also shown.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20402 - Chemical process engineering

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES

ISSN

0950-4230

e-ISSN

1873-3352

Volume of the periodical

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Issue of the periodical within the volume

94

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

8

Pages from-to

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UT code for WoS article

001382249300001

EID of the result in the Scopus database

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