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SHD-R 3000
English
5.956-486 A2005937 (06/03)
A5
A. For your safety
11. Area Classification
In the BetrSichV and EN 1127-1, hazardous
(potentially explosive) areas are classified
into zones according to the frequency and
duration of the occurrence of hazardous,
potentially explosive atmospheres.
It is the responsibility of the owner/
operator to define these zones.
Notes on area classification are given in the
BetrSichV, EN 1127-1, BGR 104 - Ex-
Guidelines of BG Chemie and in
DIN EN 60 079-10.
Zone 0
is an area in which hazardous, potentially
explosive atmospheres exists constantly,
for long periods of time or frequently as a
mixture of air and combustible gases,
vapours or mists.
Zone 1
is an area in which hazardous, potentially
explosive atmospheres consisting of a
mixture of air and combustible gases,
vapours or mists can occasionally form
during standard operation.
Zone 2
is an area in which hazardous, potentially
explosive atmospheres consisting of a
mixture of air and combustible gases,
vapours or mists do not normally occur
during standard operation or only for a short
time.
Zone 20
is an area in which hazardous, potentially
explosive atmospheres in the form of a
cloud of combustible dust contained in the
air exist constantly, frequently or for long
periods of time.
Zone 21
is an area in which hazardous, potentially
explosive atmospheres in the form of a
cloud of combustible dust contained in the
air can occasionally form during standard
operation.
Zone 22
is an area in which hazardous, potentially
explosive atmospheres in the form of a
cloud of combustible dust contained in the
air do not form during standard operation or
only for a short time.