Air System (Continued)
Ensure that new piping systems meet the o
Rerate air systems without insuring that
all components have design operating
material requirements for air systems.
pressure ratings equal to, or in excess of,
the new pressure, otherwise remove
Allow at least two threads to project
them from the system.
beyond nuts or threaded flanges on bolt-
assembled components. Cut off excess
Assume backup air supply is adequate as
bolt length where not required.
to quantity and quality. Provide
calculations and air sample test results.
Provide for blowdown of air supply
filters every hour of compressor
Operate system with missing valve
operation, or as recommended by
Install filters backwards. Check the flow
Use only approved air system filters.
directions shown on the filter or
Have relief valve exhaust directed
o Have chamber relief valve setting and
date of test shown on valve.
Leave the deck plates loose so that they
o Conduct chamber pressure tests with air
could possibly accumulate a static
per the U.S. Diving Manual.
electric charge that on discharge could
serve as an ignition source. Bolt them
o Have chamber relief valve gage valve
installed and wired open and warning
Have primary chamber support system
that requires more than three (3)
o Ensure that doors and door dogs operate
minutes to pressurize inner chamber lock
smoothly without binding, misalignment
to 165 fsw.
or interference. Effect a seal quickly and
at low pressure.
Neglect medical locks. Keep them clean
and leak-tight. Keep special wrenches
required for operation at the locks.