Aerox
®
Aviation Oxygen Systems, LLC
12871 Trade Way Drive, Suite 8
Bonita Springs, FL 34135
Page 11
Cylinder
Type
Hydrostatic Test &
Inspection Rqmt
Maximum
Service Life
DOT 3AL
Every 5 Years
Unlimited
6061T6 Alum
49 CFR § 180.209
DOT 3HT
Every 3 Years
24 Years
Steel
49 CFR § 180.209
DOT-E 8162
Every 5 Years
15 Years
Kevlar/Comp
49 CFR § 180.209
(10,000 Cycles)
DOT-E 10945
Every 5 Years
15 Years
Carbon/Comp
49 CFR § 180.209
(10,000 Cycles)
Cylinder Purge
Cylinder pressures below 50 PSI may allow air into the cylinder. Air contains
moisture and under certain temperature extremes can freeze and plug oxygen
ports and lines.
The most effective method to purge the cylinder of any suspected moisture is to
remove the regulator/valve and with the cylinder turned so the threads are
down, blow hot air (heat gun or hair dryer) into the cylinder for about 20 minutes
or until all moisture has evaporated.
Where a cylinder has been exposed to an extended period of low storage
pressure, a cleaning and inspection by a licensed maintenance facility is
recommended.
Re-Filling
Verify the condition and cleanliness of all ports and fittings prior to performing
re-filling operations.
When re-installing the regulator or valve, assure that the proper approved o-
ring or seal has been installed.
Charge the oxygen cylinder as discussed in
Initial Filling
.
Upon completion of filling operations, check for leakage using a liquid leak
detector or a mild soapy water formula.
