TATSUNO
EUROPE
a.s.,
www.tatsuno
‐
europe.com
18
Figure
12
–
Minimum
recommended
separation
distance
of
the
dispenser
from
a
fixed
obstacle
Figure
13
–
Example
of
the
CNG
dispenser
location
at
the
fuel
station
(1
‐
refilling
position
for
passenger
cars,
2
‐
refilling
position
for
trucks
and
buses,
3
‐
dispenser
CNG
dispenser,
4
‐
dispenser
refuge,
5
‐
tube
guard,
6
‐
projection
of
the
dangerous
zone
border
(zone
1)
of
the
filling
end
piece
during
delivery,
7
‐
projection
of
the
dangerous
zone
border
(zone
2)
of
the
CNG
dispenser)
3.3.2.
INSTALLATION
OF
THE
DISPENSERS
IN
TERMS
OF
EXTERNAL
INFLUENCES
(DANGER
ZONES)
Dispensers
for
gaseous
fuel
(CNG)
create
dangerous
areas
at
the
installation
site
‐
zones
where
under
certain
conditions
(high
surface
temperature,
flame,
electric
spark…
etc.)
the
fuel
or
fuel
vapor
could
ignite
or
explode.
Before
installing
the
dispenser
at
the
filling
station,
the
following
must
be
taken
into
account
in
particular:
what
danger
zones
the
dispenser
creates
with
its
operation
what
danger
zones
are
created
by
the
surrounding
equipment
(adjacent
dispenser,
storage
tank,
etc
…)
Hazardous
areas
(zones,
areas
with
a
risk
of
explosion)
are
determined
according
to
EN
60079
‐
10
‐
1.
For
CNG
dispensers
the
dispenser
zones
are
also
regulated
by
the
EN
ISO
16923.
Drawings
of
the
zones
created
by
the
dispenser
are
part
of
the
mandatory
documentation
of
the
dispenser
manufacturer,
see
documents
IN041
‐
ML
Installation
plans
I
and
IN043
ML
Installation
plans
II
.
The
drawing
of
the
zones
must
define
the
spatial
distribution
of
the
hazardous
areas
inside
and
outside
the
dispenser
‐
see
the
example
in
the
figure
below,
where
hazardous
zone
2
(simply
hatched)
occurs
up
to
a
distance
of
20
cm
vertically
and
5
cm
horizontally
from
the
contour
of
the
dispenser.
Inside
the
dispenser,
in
addition
to
the
meter
housing,
there
is
zone
1
or
zone
0
(inside
the
vapour
