Emerson Process Management GmbH & Co. OHG1-14
X-STREAM Non-Incendive
Instruction Manual
HASXENE-IM-EX
12/2014
1.7 Infallible Containments
1.7 Infallible Containments
A containment is the entirety of the gas paths
inside the analyzer.
Infallible Containments are characterized by
the fact, that no unintended release of gas
into the analyzer can happen.
This is based on connections being velded,
soldered or designed as glass-to-metal con-
nections resp. eutectic or similar methods.
Containments complying to the conditions
described above are called "in the long run
technically tight". This term is used, because
total tightness for gases is not achievable.
Technical tightness is also conceded to me-
tallically tightening tube fi ttings, such as e.g.
used with Emerson Process Managements
gas analyzers.
Such equipment remain technically tight, if the
tightness is based on design, or if it is ensured
on a permanent basis by maintenance and
monitoring.
In case of X-STREAM gas analyzers, the
function test for infallible containments is
performed according to the standard EN
60079-2.
X-STREAM non-incendive analyzers can
be used for measuring flammable gases,
if the gas paths for sample gas (and fl ammab-
le calibration gases) are designed as infallible
containments, currently available for thermal
conductivity measurements only.
1.8 Instructions for safe use
• Open gas outlets need to end at a safe
area, if releasing fl ammable gas above
25 % LEL.
• All cables (signal and power lines) need
to end in safe or protected areas (e.g. in
a suitable housing type Ex e).
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