CHART Trifecta XPro Series, Руководство по эксплуатации продукта

Страница: 10 / 56

6 Safety Product Manual - Trifecta
®
XPro Series
Caution! Before locating oxygen
equipment, become familiar
with the relevant National Fire
Protection Association (NFPA)
standards for “Bulk Oxygen
Systems at Customer Sites,”
and with all local safety codes.
The NFPA standard ( www nfpa org ) covers general
principles recommended for installing bulk oxygen systems
on industrial and institutional consumer premises
Caution! To prevent possible tip over, do
not leave tank standing upright
unless it is secured to its
foundation (bolted down).
Transporting and erection of the tank should be performed in
accordance with rigging instructions available from Chart
Failure to comply with these instructions may result in
serious damage to the container
Safety Bulletin
Portions of the following information is extracted from
Safety Bulletin SB-2 from the Compressed Gas Association,
Inc. Additional information on oxygen, nitrogen, argon, and
cryogenics is available from the CGA at www cganet com
Cryogenic containers, stationary or portable, are from time
to time subjected to assorted environmental conditions of
an unforeseen nature This safety bulletin is intended to call
attention to the fact that whenever a cryogenic container
is involved in any incident whereby the container or its
safety devices are damaged, good safety practices must be
followed The same holds true whenever the integrity or
function of a container is suspected of abnormal operation
Good safety practices dictate the contents of a damaged or
suspect container be carefully emptied as soon as possible
Under no circumstances should a damaged container be left
with product in it for an extended period of time. Further, a
damaged or suspect container should not be refilled unless
the unit has been repaired and re-certified.
Incidents which require that such practices be followed
include: highway accidents, immersion of a container in
water, exposure to extreme heat or fire, and exposure to most
adverse weather conditions (earthquake, tornadoes, etc.)
As a rule of thumb, whenever a container is suspected of
abnormal operation, or has sustained actual damage, good
safety practices must be followed
In the event of known or suspected container vacuum
problems (even if an extraordinary circumstance such as
those noted has not occurred), do not continue to use the
unit Continued use of a cryogenic container that has a
vacuum problem can lead to embrittlement and cracking
Further, the carbon steel jacket could possibly rupture if the
unit is exposed to inordinate stress conditions caused by an
internal liquid leak
Prior to reusing a damaged container, the unit must be
tested, evaluated, and repaired as necessary. It is highly
recommended that any damaged container be returned to
Chart for repair and re-certification.
The remainder of this safety bulletin addresses those adverse
environments that may be encountered when a cryogenic
container has been severely damaged These are oxygen
deficient atmospheres, oxygen enriched atmospheres, and
exposure to inert gases
Oxygen Deficient Atmospheres
Warning! Nitrogen and argon vapors in
air may dilute the concentration
of oxygen necessary to support
or sustain life. Exposure to
such an oxygen deficient
atmosphere can lead to
unconsciousness and serious
injury, including death.
The normal oxygen content of air is approximately 21%
Depletion of oxygen content in air, either by combustion
or by displacement with inert gas, is a potential hazard and
users should exercise suitable precautions
One aspect of this possible hazard is the response of humans
when exposed to an atmosphere containing only 8 to 12%
oxygen. In this environment, unconsciousness can be
immediate with virtually no warning
When the oxygen content of air is reduced to about 15
to 16%, the flame of ordinary combustible materials,
including those commonly used as fuel for heat or light,
may be extinguished. Somewhat below this concentration,
an individual breathing the air is mentally incapable of
diagnosing the situation because the onset of symptoms
such as sleepiness, fatigue, lassitude, loss of coordination,
errors in judgment and confusion can be masked by a state of
“euphoria,” leaving the victim with a false sense of security
and well being