ISO/IEC 80079-20-1:2017 爆炸性气体环境 第20-1部分：气体和蒸汽分类的材料特性 测试方法和数据

标准编号：ISO/IEC 80079-20-1:2017

中文名称：爆炸性气体环境 第20-1部分：气体和蒸汽分类的材料特性 测试方法和数据

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

发布日期：2017-12

标准范围

ISO/IEC 80079-20-1:20 17作为双对数标准发布，并提供了气体和蒸汽分类的指导。它描述了一种测试方法，用于在正常温度和压力条件（20°C，101.3 kPa）下测量气体-空气混合物或蒸汽-空气混合物的最大实验安全间隙（MESG），以便允许选择适当的设备组。本文件还描述了一种测试方法，该方法旨在用于确定在大气压下蒸汽-空气混合物或气体-空气混合物的自燃温度(AIT)，以便允许选择适当的温度等级的设备。提供材料的化学性质值，以帮助选择在危险区域使用的设备。随着经验证的测试结果变得可用，可以添加进一步的数据。表（见附件B）中所列的材料和特性是根据危险区域设备的使用而选择的。本文件中的数据取自参考书目中给出的许多参考文献。这些测定MESG或AIT的方法也可用于气体-空气-惰性混合物或蒸汽-空气-惰性混合物。然而，关于空气-惰性混合物的数据没有制成表格。关键词:气体和蒸汽的分类，最大实验安全间隙（MESG）的测量

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)

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