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StoreX
Series
STX_V078.doc
40
CMa,
23.11.2009
6.4 Gassing
Installation
6.4.1
StoreX Gassing Options
The StoreX series supports a wide selection of gassing options. Typical
properties of some commonly used options are described next. There are other
gassing options available. Note that each gassing option is linked to specific risks
and hazards. It is important to be fully informed about any specific application
before installing the instrument or even running any application.
6.4.2 Safety
Information
General
Commonly used in research medicine are inert gases like: Nitrogen, Argon,
Helium and Carbon Dioxide. Inert gases are used mainly to create and maintain
inert atmospheres for an application or process. The above gases, which
generally don't react with other materials, displace oxygen in order to maintain an
inert, contaminant free atmosphere.
In their liquid form these gases are very cold, (the boiling point of liquid nitrogen
is -196° C) . Such cold liquids are known as cryogenic liquids, (from the Greek,
kryos meaning frost and gene meaning producing).
Major hazards
There are some major hazards associated with these gases
WARNING !
Inert gases are asphyxiates and will displace oxygen to produce localized
oxygen deficient atmospheres
Inert gases are odorless, colorless and tasteless
Inert gases give no warning and may cause death in few seconds
Oxygen is the only gas, which supports life. The normal concentration in the air
that we breathe is approximately 21%. If the oxygen concentration in air
diminishes or, (what amounts to the same) if the concentration of inert gases
increases, a situation is rapidly reached where the hazards of asphyxia become
very great.
The danger occurs as soon as the oxygen levels are lower than 16%. Inert
gases are odorless, colorless and tasteless and are therefore a great deal more
dangerous than other gases such as chlorine, ammonia, or hydrogen sulfide,
which can be detected by their odor, at very low concentrations. The asphyxiating
effect of inert gases occurs without any preceding physiological signals which
could alert the victim. It takes place very rapidly: just a few dozen seconds with
very low oxygen content. Stated clearly "you do not notice that you are passing
out!"
The danger from the inert gases such as nitrogen, argon, helium, etc cannot be
stressed enough!! . Especially in this case of Asphyxia as there are no warning
signs. People also vary considerably in their reactions to oxygen deficiency.
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