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 "DO AND DON'T" SUMMARY OF
COMMON DIVING AND RECOMPRESSION CHAMBER SYSTEM DISCREPANCIES
Pressure
Gages
DON'T
DO
o Mount gages against a panel without provisions
o Have gages calibrated at least once a year or if a
for a back-mounted blowout plug to be effective.
Roylyn gage, compared every six months.
o Forget to replace all of the mounting hardware
o Have gages tagged to show when next calibra-
tion or comparison is due.
after gage calibration.
o Remove a gage for calibration without filling out
o Have an isolation valve in line with each gage as
a reentry form and capping off the line to
close to chamber hull or source as possible.
protect it from contamination.
o Have each gage adequately supported.
o Use a gage where the maximum system operat-
ing pressure is more than 75 percent of the gage
scale.
Oxygen System
DON'T
DO
o Use unapproved whips open to contamination.
o Use approved material, fittings, and fabrication
procedures for oxygen system.
o Leave unattached whips open to contamination.
o Keep all oxygen cylinders securely clamped in
place.
o Run oxygen lines so that they contact other
piping, electrical cables, brackets, etc.
o Ensure that BIBS manifolds are adequately sup-
ported.
o Keep deteriorated BIBS masks in manned or
enclosed spaces. Vent overboard to weather if
o Repair or replace BIBS regulators that free flow.
possible.
o Inspect for oxygen leaks from valve packing
stems and seats.
o Do ensure that NO SMOKING signs are
prominently displayed.
D-3
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