IEC 60079-10:2002

FOREWORD
INTRODUCTION
1 General
   1.1 Scope
   1.2 Normative references
2 Definitions and terms
3 Safety and area classification
   3.1 Safety principles
   3.2 Area classification objectives
4 Area classification procedure
   4.1 General
   4.2 Sources of release
   4.3 Type of zone
   4.4 Extent of zone
        4.4.1 Release rate of gas or vapour
        4.4.2 Lower explosive limit (LEL)
        4.4.3 Ventilation
        4.4.4 Relative density of the gas or vapour when
              it is released
        4.4.5 Other parameters to be considered
        4.4.6 Illustrative examples
5 Ventilation
   5.1 General
   5.2 Main types of ventilation
   5.3 Degree of ventilation
   5.4 Availability of ventilation
6 Documentation
   6.1 General
   6.2 Drawings, data sheets and tables
Annex A (informative) Examples of sources of release
Annex B (informative) Ventilation
Annex C (informative) Examples of hazardous area classification
Figures

Is concerned with the classification of hazardous areas whereflammable gas or vapour risks may arise, in order to permit theproper selection and installation of apparatus for use in suchhazardous areas.