Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

Hazardous Areas - European Classification Standard

European hazardous area classification with zones, protection types, temperature codes and codes.

Sponsored Links

In Europe and most of the world outside North America hazardous areas are classified with the Zone system - where

  • Zones - defines the general nature (or properties) of the hazardous material - if its gas or dust, and the probability of the hazardous material in the surrounding atmosphere
  • Groups - defines the type of the hazardous material and (partly) the location of the surrounding atmosphere

The Zone area classification system is based on the International Electrotechnical Commission IEC 60079 Explosive atmospheres.

In North America hazardous areas are classified by the Class/Division system - or by a Zone system adapted to the IEC standards.

Zones

A Zone defines the general nature - if it is a gas or dust - and the probability of hazardous material being present in an ignitable concentration in the surrounding atmosphere. The Zone system has three levels of hazard for gas or dust.

Gases, Vapors and Mists

IEC 60079-10.1 Classification of areas - Explosive gas atmospheres

Hazardous Areas - European Classification Standard - Gases, Vapors and Mists
ZoneNature and Probability of Hazard Material
Zone 0 Ignitable concentrations of flammable gases or vapors which are present continuously or for long periods of time.
Zone 1 Ignitable concentrations of flammable gases or vapors which are likely to occur under normal operating conditions.
Zone 2 Ignitable concentrations of flammable gases or vapors which are not likely to occur under normal operating conditions and do so only for a short period of time.
Dusts

IEC 60079-10.2 Classification of areas - Combustible dust atmospheres

Hazardous Areas - European Classification Standard - Dusts
ZoneNature and Probability of Hazard Material
Zone 20 An area where combustible dusts or ignitable fibers and flyings are present continuously or for long periods of time.
Zone 21 An area where combustible dusts or ignitable fibers and flyings are likely to occur under normal operating conditions.
Zone 22 An area where combustible dusts or ignitable fibers and flyings are not likely to occur under normal operating conditions and do so only for a short period of time.

Zones compares to classes and divisions in the North American Class/Division system.

Group

Group define the type of hazardous material and (partly) the location of the surrounding atmosphere. Group is divided in three groups where group I is reserved for mining locations.

Hazardous Areas - European Classification Standard - Groups
GroupType of Hazardous Material and Location of Atmosphere
Group I Mines
susceptible to firedamp (flammable mixture of gases naturally occurring in a mine).
Group II Explosive gas
atmosphere other than mines susceptible to firedamp. Group II equipment is subdivided into three subgroups.
A Atmospheres containing propane, acetone, benzene, butane, methane, petrol, hexane, paint solvents or gases and vapors of equivalent hazard.
B Atmospheres containing ethylene, propylene oxide, ethylene oxide, butadiene, cyclopropane, ethyl ether, or gases and vapors of equivalent hazard.
C Atmospheres containing acetylene, hydrogen, carbon disulphide or gases and vapors of equivalent hazard.
Group III Explosive dust
atmosphere. Group III equipment is subdivided into three subgroups.
A Atmospheres containing combustible flyings.
B Atmospheres containing non-conductive dust.
C Atmospheres containing conductive dust.

Example - Hazardous Area Classification

A room with a propane gas installation will typically be classified as

  • Zone 2, Group IIA


A petrol pump will typically be classified as

  • Zone 1, Group IIA
Sponsored Links

Related Topics

Related Documents

Sponsored Links

Search

Search is the most efficient way to navigate the Engineering ToolBox.

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with older versions of the amazing SketchUp Make and the newer "up to date" SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp Make/Pro from the Extension Warehouse !

Translate this Page

Translate this page to Your Own Language .

About the Engineering ToolBox!

Privacy Policy

We don't collect information from our users. More about

Citation

This page can be cited as

  • The Engineering ToolBox (2003). Hazardous Areas - European Classification Standard. [online] Available at: https://www.engineeringtoolbox.com/hazardous-areas-classification-d_395.html [Accessed Day Month Year].

Modify the access date according your visit.

3D Engineering ToolBox - draw and model technical applications! 2D Engineering ToolBox - create and share online diagram drawing templates! Engineering ToolBox Apps - mobile online and offline engineering applications!

Unit Converter

















































3.15.9

Sponsored Links
.