Flammable materials, especially grease and oil,
must be kept out of the stowage space used for
Each cylinder must be securely fastened in the
vertical position (valve end up) by using such
means as metal collars. On cargo ships fitted
especially for cylinder transport, other
arrangements are approved.
Oxygen and chlorine must be stowed in
compartments separate from flammable gases.
Inert or nonflammable gases may be stowed in
compartments designated for compressed gas
Compartments containing compressed gases
must be ventilated for 15 minutes before entry if
the ventilation has been secured; a suitable sign
to this effect should be posted on the outside of
the access door.
When compressed gas is stowed on the weather
deck, the following additional precautions must be
Oxygen and chlorine cylinders must not be in
close proximity to fuel-gas cylinders.
Cylinders containing compressed gases should
be stowed so that they will be protected. During the
winter, cylinder valves must be protected against the
accumulation of snow and ice. Warm water (not hot)
should be used to thaw ice accumulations in cylinder
valve caps and outlets. During the summer, cylinders
must be screened from the direct rays of the sun. Every
effort should be taken to prevent corrosion of threaded
connections of cylinders in stowage for extended
periods of time. The use of grease or flammable
corrosion inhibitors on oxygen cylinders is not
The stowage area should be as remote as
practical from navigating, fire control, and gun stations.
Asbestos is a fibrous material that is incombustible
(doesnt burn), possesses high tensile strength, has good
thermal and electrical insulating properties, and has
moderate to good chemical resistance. Because of these
characteristics, the Navy has had many uses for
asbestos. Asbestos was used as the primary insulation
and lagging material for high-temperature machinery,
boilers, and piping on board ships. Other applications
included floor tile, tile underlayment (especially decks
above engineering spaces), rope and pressed gaskets,
brake and clutch facings, and expansion joints.
When intact and not disturbed, asbestos doesnt
normally present a hazard. Problems arise when repair
work causes the generation of asbestos dust. Inhaling
asbestos fibers present in the dust may lead to various
forms of asbestos-related diseases. Most symptoms of
asbestos-related diseases do not show up until 10 to 45
years after exposure. Since the total removal of all
asbestos materials on board Navy ships is not feasible,
the Navy has instituted a program to control the use and
replacement of asbestos with nonasbestos substitutes.
Only specially trained and medically qualified
personnel are authorized to remove asbestos. When
asbestos material is being handled, complex safety
requirements and precautions are used. Never enter a
space that has been designated as an asbestos hazard
area unless specifically told to do so. For more
detailed instructions on the hazards and control of
asbestos, refer to Navy Safety Precautions for Forces
Afloat, OPNAV 5100.19.
Reinforced plastic materials are currently being
used by the Navy in
Protective coverings for wood and steel, and
Many other types of equipment and materials.
Reinforced plastic is made of glass fibers, resin, and
chemicals, which gives it the name fiberglass. The resin
and activating chemicals bond the glass fibers together,
producing a very tough and rugged material. Polyester
or epoxy resins are used to make fiberglass.