MANUAL for kg20 kg6 kg6 bAsic
dr
y
ic
e
bl
a
sting
eq
uipm
ent
fro
m
icetech
|
P
A
ge
co
2
concentrations
the dry ice pellets are co
2
in solid form. at normal
atmospheric pressure, co
2
can only exist in solid
form at temperatures of –79°c/110°f or lower. When
it is used as a blasting medium it becomes heated
and changes into gaseous form. as co
2
has a higher
specific
gravity than ordinary atmospheric air, inhaled
air will contain co
2
– especially if the blasting process
takes place in small or partly closed rooms. in such
conditions there is a risk of the oxygen content of in-
haled air being replaced by co
2
. therefore make sure
that the room where such a risk might be present is
well ventilated.
Note that:
• low co
2
concentrations (3-5%) result in
headaches and rapid breathing.
• co
2
concentrations of 7-10% produce headaches
and nausea, and may lead to unconsciousness.
• higher co
2
concentrations lead to unconscious-
ness and, in the worst case, suffocation.
as stated above, high co
2
concentrations can dis-
place oxygen and result in unconsciousness. there-
fore, avoid using the blasting equipment in spaces/
rooms where ventilation is limited.
important!
in rooms, closed tanks, etc. with limited ventilation,
the presence of a co
2
detector is recommended.
this can be installed to interrupt blasting before the
co
2
concentration exceeds a prescribed limit.
“ in many cases cleaning is possible
without dismantling. The frequency of
production stops is therefore often
drastically reduced. ”
