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

This is an AMP page - Open full page! for all features.

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

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

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.

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

Share

Search Engineering ToolBox

  • the most efficient way to navigate the Engineering ToolBox!

SketchUp Extension - Online 3D modeling!

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 the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

Privacy

We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.

Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.

Google use cookies for serving our ads and handling visitor statistics. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected.

AddThis use cookies for handling links to social media. Please read AddThis Privacy for more information.

Topics

Unit Converters

Temperature

oC
oF


Load Calculator!

Length

m
km
in
ft
yards
miles
naut miles


Load Calculator!

Area

m2
km2
in2
ft2
miles2
acres


Load Calculator!

Volume

m3
liters
in3
ft3
us gal


Load Calculator!

Weight

kgf
N
lbf


Load Calculator!

Velocity

m/s
km/h
ft/min
ft/s
mph
knots


Load Calculator!

Pressure

Pa (N/m2)
bar
mm H2O
kg/cm2
psi
inches H2O


Load Calculator!

Flow

m3/s
m3/h
US gpm
cfm


Load Calculator!

3 30

This website use cookies. By continuing to browse you are agreeing to our use of cookies! Learn more