BS EN 60079-10-1-2009 爆炸性气体.第10-1部分:区域分级.爆炸性气体

标准号：BS EN 60079-10-1-2009
中文标准名称：爆炸性气体.第10-1部分:区域分级.爆炸性气体
英文标准名称：Explosive atmospheres — Part 10-1: Classification of areas — Explosive gas atmospheres
标准类型：C67
发布日期：2009/4/30 12:00:00
实施日期：2009/4/30 12:00:00
中国标准分类号：C67
国际标准分类号：13.230;29.260.20
引用标准：IEC 60050-426;IEC 60079-0;IEC 60079-4;IEC 60079-4A;IEC 60079-20
适用范围：This part of IEC 60079 is concerned with the classification of areas where flammable gas orvapour or mist hazards (see Notes 1, 2 and 3) may arise and may then be used as a basis tosupport the proper selection and installation of equipment for use in a hazardous area.It is intended to be applied where there may be an ignition hazard due to the presence offlammable gas or vapour, mixed with air under normal atmospheric conditions (see Note 4),but it does not apply toa) mines susceptible to firedamp;b) the processing and manufacture of explosives;c) areas where a hazard may arise due to the presence of combustible dusts or fibres (referto IEC 61241-10 / IEC 60079-10-2);d) catastrophic failures which are beyond the concept of abnormality dealt with in thisstandard (see Note 5);e) rooms used for medical purposes;f) domestic premises.This standard does not take into account the effects of consequential damage.Definitions and explanations of terms are given together with the main principles andprocedures relating to hazardous area classification.For detailed recommendations regarding the extent of the hazardous areas in specificindustries or applications, reference may be made to national or industry codes relating tothose applications.NOTE 1 Flammable mists may form or be present at the same time as flammable vapours. Liquids not consideredto be hazardous in terms of this standard (due to the flash point), when released under pressure may also generateflammable mists. In such cases, the strict application of area classification for gases and vapours may not beappropriate as the basis for selection of equipment.Information on flammable mists is provided in Annex D.NOTE 2 The use of IEC 60079-14 for selection of equipment and installations is not required for mist hazards.NOTE 3 For the purpose of this standard, an area is a three-dimensional region or space.NOTE 4 Atmospheric conditions include variations above and below reference levels of 101,3 kPa (1 013 mbar)and 20 °C (293 K), provided that the variations have a negligible effect on the explosion properties of theflammable materials.NOTE 5 Catastrophic failure in this context is applied, for example, to the rupture of a process vessel or pipelineand events that are not predictable.NOTE 6 In any process plant, irrespective of size, there may be numerous sources of ignition apart from thoseassociated with equipment. Appropriate precautions will be necessary to ensure safety in this context. Thisstandard may be used with judgement for other ignition sources.