ISO/IEC 80079-20-1:2017/COR1:2018

 ISO/IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
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ISO/IEC 80079-20-1 ISO/IEC 80079-20-1
Edition 1.0  2017-12 Édition 1.0  2017-12

Explosive atmospheres – Atmosphères explosives –

Part 20-1: Material characteristics for gas and Partie 20-1: Caractéristiques des produits pour
vapour classification – Test le classement des gaz et des
methods and data vapeurs – Méthodes et données d'essai

CO RRI G E NDUM 1
Corrections to the French version appear after the English text.
Les corrections à la version française sont données après le texte anglais.

FOREWORD
Replace the two sentences, “It constitutes a technical revision. No significant changes were made with
respect to IEC 60079-20-1:2010” by the following new text:
It constitutes a technical revision. This edition includes the following significant technical changes with
respect to the previous edition:
The classifications for the temperature class or equipment group were changed in the informative
Annex B for the following materials: CAS-No. 64-17-5; 78-93-3; 107-31-3:
• For dry Ethanol (CAS-No. 64-17-5), equipment group remains IIB, but for Ethanol in air with
≥4% water vapour, as in common atmospheres, a second line has been added to indicate IIA;
• For 2-Butanone (CAS-No. 78-93-3), re-measurement indicated change from IIB to IIA was
needed; and
• For Formic Acid Methyl Ester (CAS-No. 107-31-3), re-measurement indicated change from T2
to T1 was justified.
No significant changes were made with respect to the normative text of IEC 60079-20-1:2010.

3.5
minimum ignition current
MIC
Replace the term “minimum ignition current” with the following new term:
minimum igniting cu
...