ISO/IEC 80079-20-1:2017 PRV 
Pre release version

Explosive atmospheres - Part 20-1: Material characteristics for gas and vapour classification - Test methods and data

English/French
CHF 

Do you need a multi-user copy?


Preview

Abstract

This Final Draft International Standard is an up to 6 weeks' pre-release of the official publication. It is available for sale during its voting period: 2017-09-29 to 2017-11-10. By purchasing this FDIS now, you will automatically receive, in addition, the final publication.

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)

Look inside


Additional information

Publication typeInternational Standard
Publication date2017-09-29
Edition1.0
Available language(s)English/French
TC/SCTC 31/SC 31M - Non-electrical equipment and protective systems for explosive atmospheresrss
ICS13.230 - Explosion protection
29.260.20 - Electrical apparatus for explosive atmospheres
Stability date  2020
Pages177
File size2789 KB

Share your publications

Learn how to share your publications with your colleagues, using networking options.

Payment information

Our prices are in Swiss francs (CHF). The following credit cards are accepted: American express, Mastercard and Visa. Request a pro forma to pay by bank transfer.


Keep in touch

Keep up to date with new publication releases and announcements with our free IEC Just Published email newsletter.

Contact customer services

Please send your enquiry by email or call us on +41 22 919 02 11 between 09:00 – 17:00 CET Monday to Friday.