Technical Description
TITANUS
PRO·SENS
®
44
06/13
Detonation prevention device for endangered areas
Figure 28: Detonation prevention device in the air sampling smoke detection system
and air return system
TITANUS
®
can also be used in dangerously explosive areas by installing a
detonation prevention device. Both must be installed outside the protected
area.
To protect a dangerously explosive area a detonation prevention device is
essential, because deflagrations or detonations can result in the TITANUS
®
pipe system if vapour/air mixtures should ignite. This depends on the type,
concentration, starter pressure and temperature of the flammable mixture.
The detonation prevention devices, type EG xx, are flame breakthrough bar-
riers, resistant to pipe explosions (deflagrations) as well as resistant to deto-
nations (see fig „Detonation prevention device in the air sampling smoke de-
tection system and air return system“).
During standard operation the vapour or gas mixtures flow through the pre-
vention device. The flow direction is interchangeable. If the mixture is ignited
in the primary air sampling system the developing detonation is stopped. The
flame breakthrough (nominal gap width) is avoided by means of the flame fil-
ters. If the mixture ignites near the flame filters, the detonation front could re-
coil. In order to avoid this minimum pipe length between the mounting loca-
tion of the detonation prevention de-vice and the possible ignition source (air
sampling system) must be 1.0 m. Thus, indirectly, permanent fire prevention
is achieved.
3.3.8
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