Quantcast Gas Sample Analysis

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k.
Packaging
l.
Identification/Labeling.
WARNING:
Some  cleaning  standards  a n d  specifications list
trichloroethylene and methyl chloroform as cleaning agents-- NAVFAC
DM-39  specifically  prohibits  the  use  of  these  two  agents  for
cleaning man-rated hyperbaric systems.
3.7.2
Gas Sample Analysis.
Every six months or after
cleaning, hydrotesting, and assembly, a gas sample shall be taken
from each system that contains gases that will be breathed by
Trace
chamber  occupants  and  analyzed  for  trace  contaminants.
contaminants and their maximum limits shall be in accordance with
Table  3-2  or  "Limits  for  Atmospheric  Constituents,  90-day
Limit" (Table E-2), Appendix E, Diving System Environmental Control,
SS521-AA-MAN-010.
Test reports shall be completed.
TABLE 3-2
STANDARD FOR AIR IN HYPERBARIC FACILITIES
Parameter
Limit
20-22% by volume
Oxygen
1000 ppm maximum
Carbon monoxide
20 ppm maximum
Total hydrocarbons
25 ppm maximum
other than methane
Particulates and oil mist
5 mg/m3 maximum
Odor and taste
Not objectionable
NOTE:  These standards are applied to nonsaturation air dives and
are measured at standard temperature and pressure.  During normal
gas other than methane analysis, hydrocarbons are first converted
to methane and analyzed methane value is then subtracted from this
Unknown
result  to  give  the  value  for  unknown  hydrocarbons.
hydrocarbons should not exceed 25 ppm.
3.8.
EQUIPMENT AND COMPONENT MAINTENANCE PRACTICES
addresses
specific
3.8.1
General.
This
section
maintenance practices to be used as a base line for the development
of  maintenance  procedures  for  man-rated  hyperbaric  facilities.
requirements
and
address
the
These
maintenance
practices
3-16





 


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