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ISO/IEC 80079-20-1-ed.1.0
Explosive atmospheres - Part 20-1: Material characteristics for gas and vapour classification - Test methods and data
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STANDARD published on 14.12.2017
The information about the standard:
Designation standards: ISO/IEC 80079-20-1-ed.1.0
Publication date standards: 14.12.2017
SKU: NS-942834
The number of pages: 176
Approximate weight : 559 g (1.23 lbs)
Country: International technical standard
Category: Technical standards ISO
The category - similar standards:
Explosion protectionElectrical apparatus for explosive atmospheres
Annotation of standard text ISO/IEC 80079-20-1-ed.1.0 :
ISO/IEC 80079-20-1: 2017 is published as a dual log standard and provides guidance on classification of gases and vapours. It describes a test method intended for the measurement of the maximum experimental safe gaps (MESG) for gas-air mixtures or vapour-air mixtures under normal conditions of temperature and pressure (20 °C, 101,3 kPa) so as to permit the selection of an appropriate group of equipment. This document also describes a test method intended for use in the determination of the auto-ignition temperature (AIT) of a vapour-air mixture or gas-air mixture at atmospheric pressure, so as to permit the selection of an appropriate temperature class of equipment. Values of chemical properties of materials are provided to assist in the selection of equipment to be used in hazardous areas. Further data may be added as the results of validated tests become available. The materials and the characteristics included in a table (see Annex B) have been selected with particular reference to the use of equipment in hazardous areas. The data in this document have been taken from a number of references which are given in the bibliography. These methods for determining the MESG or the AIT may also be used for gas-air-inert mixtures or vapour-air-inert mixtures. However, data on air-inert mixtures are not tabulated. Keywords: classification of gases and vapours, measurement of the maximum experimental safe gaps (MESG) The contents of the corrigendum of July 2018 have been included in this copy. ISO/IEC 80079-20-1:2017 est publiee en tant que norme sous double logo et donne des recommandations pour le classement des gaz et des vapeurs. Elle decrit une methode dessai destinee a mesurer les interstices experimentaux maximaux de securite (IEMS ou MESG – maximum experimental safe gaps) des melanges gaz-air ou vapeur-air dans des conditions normales de temperature et de pression (20 °C, 101,3 kPa) afin de pouvoir choisir un groupe approprie dappareils. Le present document decrit egalement une methode dessai qui permet detablir la temperature d’auto-inflammation (TAI ou AIT – auto-ignition temperature) dun melange vapeur-air ou gaz-air a la pression atmospherique, afin de pouvoir choisir une classe de temperature appropriee des appareils. Les valeurs des proprietes chimiques des produits sont fournies pour faciliter le choix des appareils a utiliser dans les emplacements dangereux. Des donnees supplementaires peuvent etre ajoutees au fur et a mesure de l’obtention de resultats d’essai valides. Les produits et les caracteristiques indiques dans un tableau (voir l’Annexe B) ont ete choisis tout particulierement pour lutilisation dappareils dans des emplacements dangereux. Les donnees fournies dans le present document sont extraites d’un certain nombre de documents de reference qui sont cites dans la bibliographie. Ces methodes de determination de l’IEMS ou d’etablissement de la TAI peuvent etre egalement appliquees pour les melanges gaz-air-matiere inerte ou les melanges vapeur-air-matiere inerte. Les donnees relatives aux melanges air-matiere inerte ne sont toutefois pas fournies. Mots cles: classement des gaz et des vapeurs, mesurer les interstices experimentaux maximaux de securite (IEMS ou MESG) Le contenu du corrigendum de juillet 2018 a ete pris en consideration dans cet exemplaire.
These corrections apply to this standard:
ISO/IEC 80079-20-1-ed.1.0/Cor.1
Correction
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Corrigendum 1 - Explosive atmospheres - Part 20-1: Material characteristics for gas and vapour classification - Test methods and data
(Corrigendum 1 - Atmospheres explosives - Partie 20-1: Caracteristiques des produits pour le classement des gaz et des vapeurs - Methodes et donnees d´essai)
Correction published on 25.7.2018
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