The brick manufacturer
Leipfinger-Bader has invested
in a fire protection system
from GreCon. The system
used for extinguishing pipe
fires monitors the flue gas
ducts with spark detectors
from GreCon and triggers the
extinguishing process if necessary.
An invisible danger
Bricks are produced at the
highly automated Puttenhausen
site in a 7-day week in
two-shift operation. A central
component of the production
process is the firing of the
green bricks at temperatures
higher than 900 °C in a 90-mlong
In the past, brickworks
often used heavy oil as fuel,
and this used to be the case
in Putthausen, too. Owing to
high storage costs, expensive
preheating of the oil to 80 °C,
strongly fluctuating prices and
poor supply reliability, many
brickworks have switched to
gas. One difference between
the two energy sources is the
deposits. In contrast to heavy
oil, which tends to soot, gas
causes deposits during the
combustion process. This
bitumen-like substance settles
in the extraction system.
High process temperatures or
special conditions in the firing
system can ignite the material
and lead to a fire in the extraction
Pipe fire extinguishing –on-the-spot
extinguishing during ongoing production.
In addition to the difficult extinguishing
conditions from outside, the fire loads are
Deposits of carbon, tar and polystyrene
have a similar calorific valueto petrol.
With a 30-m-long pipeline in DN1000 and
a layer thickness of, for example, 5 mm,
this results in large stored energy quantities.
When these deposits are ignited,
pockets of fire are formed.
As the fire progresses,the deposits are liquefied
and the entire pipeline begins to burn.
Fagus-GreCon has taken a preventive approach,
an individually coordinated concept based on
a spark extinguishing system.
Sparks and fire pockets are detected in the
pipeline. With an extinguishing nozzle at the
beginning of the extraction line, a pipe fire
can be easily and purposefully fought.
Leipfinger Bader focuses
In order to avoid such a pipe
fire, the flue gas ducts at
Leipfinger Bader have been
monitored with spark detectors
from GreCon since the
beginning of 2019. Fibre optics
allow monitoring even at
high process temperatures. If
ignition sources are detected,
extinguishing is initiated, and
water is finely atomized along
the entire length of the pipe.
„At three sparks, the
GreCon system sounds the
alarm – at six sparks, extinguishing
is initiated,“ says
Thomas Brunner, Deputy
Technical Operations Manager
at Leipfinger-Bader, describing
the different alarm levels.
These individually adjustable
thresholds enable a protection
concept that is optimally
adapted to the system. All extinguishing
systems can also
be controlled manually via
panels with manual switches.
High process temperatures
in conjunction with deposits
result in a dangerous combination.
Leipfinger-Bader has increased safety
in production by installing the fire protection
system and is convinced of the effectiveness
of this solution.
In order to achieve reliable
protection against fires across
all its plants, the company has
already placed the next order
for the installation of a pipe
fire extinguishing system at its