"DO AND DON'T" SUMMARY OF
COMMON DIVING AND RECOMPRESSION CHAMBER SYSTEM DISCREPANCIES
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
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
o Run oxygen lines so that they contact other
piping, electrical cables, brackets, etc.
o Ensure that BIBS manifolds are adequately sup-
o Keep deteriorated BIBS masks in manned or
enclosed spaces. Vent overboard to weather if
o Repair or replace BIBS regulators that free flow.
o Inspect for oxygen leaks from valve packing
stems and seats.
o Do ensure that NO SMOKING signs are