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.
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
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,
Test reports shall be completed.
STANDARD FOR AIR IN HYPERBARIC FACILITIES
20-22% by volume
1000 ppm maximum
20 ppm maximum
25 ppm maximum
other than methane
Particulates and oil mist
5 mg/m3 maximum
Odor and taste
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
result to give the value for unknown hydrocarbons.
hydrocarbons should not exceed 25 ppm.
EQUIPMENT AND COMPONENT MAINTENANCE PRACTICES
maintenance practices to be used as a base line for the development
of maintenance procedures for man-rated hyperbaric facilities.