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Page Title:
Table I. Nitrogen supplv gas - acceptable contaminant level |
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|  MIL-R-81202D(AS)
Nitrogen supplv gas - acceptable contaminant level
TABLE I.
Maximum Contaminant Level
Contaminant
Water (H20)
2 parts per million (by volume)
2 parts per million (by volume)
Carbon Dioxide
Freon
3 parts per million (by volume)
10 parts per million (by volume)
Total hydrocarbons (including
Methane and Acetylene)
1 part per million (by volume)
Acetylene
6 parts per million (by volume)
Methane
3 parts per million (by volume)
Hydrocarbons (others)
Maximum of 100 particles, 5.0 to
Foreign particles
10.0 microns per cubic foot of
flow. No particle larger than
10.0 microns allowed.
3.7.3 Visual. The nitrogen receiver shall meet the visual requirements to
ensure conformance to all requirements listed on DL 58A164D556 and as specified
herein (see 4.6.3).
3.7.4 Cleanliness. The nitrogen receiver shall be pressurized through the
charging valve to 2000 50 psig with nitrogen gas (see 3.6). The samples taken
from the nitrogen receiver shall not exceed the maximum contaminant levels
-specified in Table I, after exposure to the temperature conditioning cycle as
follows:
a.
The ambient temperature shall be reduced to 15.6C (60F) and
maintained for approximately 12 hours.
The ambient temperature shall be increased to 43.3C (110F)
b.
and maintained for approximately 12 hours.
c.
The ambient temperature conditioning of a and b shall be repeated.
At the completion of the conditioning cycle, and within 10 minutes after re-
moval from the 43.3C (110F) ambient condition, a gas sample shall be with-
drawn from the receiver assembly charging valve.
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