|
resistant and designed for liquid Co, It tant application for CO, cylinders withoutSRI
<br /> would be potentially fatal, for example, dip tubes Is in beverage dispensing. •` - _
<br /> to connect a CO, dip tube cylinder to a CO, cylinders without dip tubes must be
<br /> beer keg without a regulator. The keg used with a regulator to dispense gas, so W
<br /> N
<br /> would 6e completely incapable of with the pressure can be reduced to a level �^
<br /> standing the pressure of the evaporating appropriate for the intended purpose. -
<br /> liquid CO„ and would burst. CO, cylinders without dip tubes must be
<br /> • Pipe sections (or liquid CO, equipped vertical while gas is being withdrawn. A
<br /> with shutoff devices must also be equip- horizontal cylinder would release liquid
<br /> ped with a safety valve. CD„ which might cause the supply appara-
<br /> When liquid carbon dioxide withdrawn tus to clog up with CO, snow.
<br /> from a dip tube cylinder expands to The rate at which CO, can be withdrawn
<br /> atmospheric pressure, CO, snow Is from cylinders without dip tubes Is limited, resulting from evaporation could burst
<br /> produced. Dip tube cylinders are there- the container.
<br /> fore used primarily in instances where No one should enter a room in which dry
<br /> CO, snow is required, for example to Ice Is being stored until the accompa-
<br /> refrigerate foodstuffs. CO, snow an be - nying gaseous CO, has been removed by
<br /> dangerous In several ways. If it contacts adequate ventilation.
<br /> human skin while emerging, there Is a - - • Dry ice in larger quantities must be
<br /> danger of cryogenic burns, Minimum transported only in vehicle cargo com-
<br /> protection should therefore consist of sa- partmem s that are isolated in a gas-tight
<br /> fety glasses for the eyes. The CO, snow manner from the cab or passenger
<br /> can also clog the supply system. When - < compartment,
<br /> a plug of CO, snow is suddenly loose- U11111, _,
<br /> ned, for example by striking the supply 4. Conclusion
<br /> hose, the backedup liquid CO, abruptly Low temperature warning
<br /> deprssurises. This can cause the hose to Carbon dioxide, In all its forms, can be used
<br /> fly around or burst, injuring people of since the CO, must evaporate from the li- for many purposes. it is important to use
<br /> damaging property. quid phase. This process absorbs heat from its capabilities correctly in order to achieve
<br /> • Avery specific hazard can arise when the environment, which means that the the desired effect and eliminate hazards.
<br /> CO, Is used to Inert flammable gases or gas cylinder and especially the valve can our gas specialists can tell you how to do
<br /> vapours. In a flowing mixture of gaseous Ice up. This may make the valve difficult to that.
<br /> Co, and CO, snow,the "snowflakes" can operate. To prevent this, multiple cylinders Consultation in all business and technical
<br /> become electrostatically charged and should be used when large amounts of CO, problems is made available by the experts
<br /> can Ignite an explosive gas / air mixture are needed, or the Cylinder can be heated of our sales 0(fices.
<br /> by sparking. CO, should therefore never with warm water (maximum 500C). The
<br /> be sprayed directly Into a cloud of cylinder should never be heated with a
<br /> flammable gas or vapour. This important flame.
<br /> instruction applies to CO, cylinders with _
<br /> or without a dip tube. Handling of Dry Ice
<br /> Withdrawing Gas from CO, Cylinders Wit- Because of its low temperature and the
<br /> hout Dip Tubes formation of gaseous CO„ a few special
<br /> safety precautions must betaken when
<br /> handling dry Ice:
<br /> ' g I Dry Ice Is not edible. Do not lick it or
<br /> place It directly in beverages. The cold
<br /> and subsequent pressure might have
<br /> unpleasant effects on the human body.
<br /> Keep dry ice out of the reach of children!
<br /> _ Because of its low temperature, dry ice
<br /> must not be handled with bare hands.
<br /> Wearing gloves or using appropriate
<br /> tongs will protect against freeze burning.
<br /> In CO, cylinders without dip tubes, carbon When manually chopping up dry ice with
<br /> dioxide is withdrawn from the top of the a suitable Implement, protect the eyes
<br /> cylinder. When the cylinder valve is open- from flying particles by wearing safety
<br /> ed, the pressure In the cylinder decreases. glasses.
<br /> CO, continously evaporates from the liquid Dry ice must not be stored or transported
<br /> phase and emerges as a gas. One Impor- In tightly sealed containers. The pressure
<br /> Linde AG
<br /> Linde Gas Division, Linde Gas Germany, 5eitnerstrafie 70, 82049 Pullach
<br /> Phone 018 03.85 000-0', fax 018 03.85 000-1, wwwlinde-gas.mm
<br /> safety Advice. 12 - Working with Carbon dioxide ca,. Pare 3
<br />
|