Specifications

3
SAFETY
4
Chart has conducted a rigid test program for liquid
c
ylinders, both internally and through an independent
testing laboratory, to verify the safety of Chart equip-
ment. Chart cylinders are safely designed with the
following features:
(1) An exclusive all stainless steel support system de-
signed to withstand many years of rugged service.
(2) A stainless steel neck tube that is designed not to
break in case of a minor accident, such as a liquid
cylinder being inadvertently tipped over.
(3) A vacuum maintenance system specifically de-
signed to provide long life and safety provisions.
(4) Safety relief devices to protect the pressure ves-
sel and vacuum casing, sized and selected in
accordance with CGA Pamphlet S-1.1 “Safety Relief
Devices for Cylinders.” The safety of the inner pres-
sure vessel is controlled by a pressure relief valve and
rupture disc. The vacuum space is protected from
overpressurization by the pump-out, based on the re-
quirement of CGA 5-1.1-2003. The pump-out also
functions as the vacuum port.
While Chart equipment is designed and built to rigid
standards, no piece of mechanical equipment can
ever be made 100% safe. Strict compliance with
proper safety and handling practices are necessary
when using a liquid cylinder or other compressed gas
equipment. We recommend that all our customers re-
emphasize safety and safe handling practices to all
their employees and customers. While safety features
have been designed into the unit and safe operations
are anticipated, it is essential that the user of these
liquid cylinders carefully read to fully understand all
WARNINGS, CAUTION and Notes listed in this safety
section and enumerated below. Also read to fully un-
derstand the information provided in the Safety
Bulletins for Oxygen and Inert Gases located in
Section 19 of this Manual. Periodic review of the
Safety Summary is recommended.
WARNING
Excess accumulation of oxygen creates an oxygen
enriched atmosphere (defined by the Compressed
Gas Association as an oxygen concentration above
23 percent).
In an oxygen enriched atmosphere,
flammable items burn vigorously and could ex-
plode. Certain items considered non-combustible
in air may burn rapidly in such an environment.
Keep all organic materials and other flammable
substances away from possible contact with oxy-
gen; particularly oil, grease, kerosene, cloth, wood,
paint, tar, coal dust, and dirt which may contain oil
or grease. DO NOT permit smoking or open flames
in any area where oxygen is stored, handled, or
used. Failure to comply with this warning may re-
sult in serious personal injury.
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 se-
rious injury, including death.
WARNING
The Dura-Cyl/Cryo-Cyl Series, with its stainless
steel support system is designed, manufactured,
and tested to function normally for many years of
service. Chart does not suggest or warrant that it is
ever safe to drop a liquid cylinder or let it fall over
in oxygen or any other cryogenic service. In the
event a liquid cylinder is inadvertently dropped,
tipped over, or abused, slowly raise it to its nor-
mal vertical position. Immediately open the vent
valve to release any excess pressure in a safe
manner. As soon as possible, remove the liquid
product from the vessel in a safe manner. If the
vessel has been used in oxygen service, purge it
with an inert gas (nitrogen). If damage is evident
or suspected, return to Chart prominently marked
“LIQUID CYLINDER DROPPED, INSPECT FOR
DAMAGE”.
WARNING
Before removing cylinder parts or loosening fit-
tings, completely empty the liquid cylinder of liquid
and release the entire vapor pressure in a safe
manner. External valves and fittings can become
extremely cold and may cause painful burns to
personnel unless properly protected. Personnel
must wear protective gloves and eye protection
whenever removing parts or loosening fittings.
Failure to do so may result in personal injury be-
cause of the extreme cold and pressure in the
cylinder.