MIL-PRF-25508H
3.3 Filter. A filter with no more than a 10-micrometer nominal and 40-micrometer absolute rating
shall be installed between the manufacturer's plant system and the manifold used to fill the gas or liquid
containers for delivery.
TABLE I. Grade limits for oxygen.
Grade
Test Method
A
B
F
Purity, percent by volume,
99.6
99.5
99.990
4.4.1
min
Impurities, ppm by
volume, max
4000
5000
100
4.4.1
Total hydrocarbons as
50
67.7
20
4.4.2
methane
Water
3
26.3
3
4.4.2
Methane
Note a
Note a
16
4.4.2
Ethane
Note a
Note a
2
4.4.2
Propane and higher
Note a
Note a
1
4.4.2
hydrocarbons as propane
Nitrous oxide
Note a
Note a
1
4.4.2
Halogenated
Note a
Note a
1
4.4.2
hydrocarbons
Carbon monoxide and
Note a
Note a
1
4.4.2
carbon dioxide
Other (N, Ar, Kr, etc.)
Note a
Note a
75
4.4.2
Odor
Note a
Note a
None
4.4.2
b
Particulate , mg/L, max
1.0
1.0
1.0
4.4.3
Notes:
a. No limit for this grade.
b. Applies to Type II product only. The particulate test requirement and limit may be deleted by the
procuring activity (see 6.2).
3.4 Filled containers (Type I only).
3.4.1 Filling Pressure. The container filling pressure shall not differ from that required by the
contract by more than 1.0% at 70°F when tested as specified in 4.5.1. In no case shall the filling pressure
exceed the rated service pressure of the container. Pressure-Temperature Filling Charts in CGA P-15
may be used.
3.4.2 Leakage. Cylinders shall not leak when tested according to 4.5.2.
4
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