Do not alter or deface the numbers or other
markings on the cylinders. Do not add markings
without approval of the engineer officer. Do not
issue cylinders if their contents cannot be
Detailed information relative to the stowage, handling,
and use of various types of compressed gases are
contained in the Naval Ships Technical Manual.
Information pertinent to especially hazardous gases
commonly used by ships is as follows.
unstable, and may explode when subjected to heat or
shock or upon contact with chlorine or certain metals
such as copper, silver, and mercury. Therefore,
acetylene must be stowed separately from oxygen or
any other materials with which it forms an explosive
compound. The gas must never be allowed to escape
into an enclosed area The cylinders must be protected
from flames, sparks, lightning, and static electricity.
Testing for suspected leaks should be done with soapy
Toxicity. In moderate concentrations, acetylene
may act as an intoxicant. In higher concentrations, it
will cause unconsciousness and ultimately
asphyxiation. Some grades of acetylene also contain
many impurities. Therefore, breathing of acetylene in
any concentration for any length of time must be
Upright Stowage Required. Acetylene in
cylinders is dissolved in acetone which has a tendency
to flow into the valve if the cylinders a stowed
horizontally. For this reason, acetylene must be stowed
and used only in an upright position with the valve end
up. When it is known or suspected that acetylene
cylinders have been stowed on their sides, they will not
be used until they have been in a vertical position for at
least 2 hours.
OXYGEN AND CHLORINE. Oxygen and
chlorine are oxidizing gases that strongly support
combustion. Chlorine is also poisonous. Oxygen and
chlorine cylinders must be stowed on the weather deck,
or in a separate watertight storeroom which has at least
one compartment between it and any space that is used
for the stowage of combustibles such as flammable
liquids or gases, ammunition, paint, gasoline, and oil.
nitrogen, carbon dioxide, and argon arem nonflammable
gases. Because of their inert characteristics, they may
be stowed with flammable or oxidizing gases. Since
these non-flammable gases will not support expiration
(a sufficient concentration in a closed space will cause
asphyxiation), they must bestowed on the weather deck
or in other well-ventilated spaces.
AEROSOL PRO DUCTS. Aerosol products are
liquids, solutions, or powders suspended in a gas
propellant and contained in dispensers equipped with
release valves. Aerosol containers are used for the
dispersal of paints, enamels, lacquers, insecticides,
silicones rust preventives, etc. The aerosol propellants
may be low boiling halogenated hydrocarbons or other
hydrocarbons such as liquified propane or isobutane.
Aerosol cylinders will burst if exposed to heat sources
in excess of 120 degrees F. They are prone to leakage
if subjected to impact. Aerosol propellants are
extremely flammable and in sufficient concentration,
can be anesthetic or asphyxiating. Aerosol products
should be stowed in the flammable liquids storeroom,
or in cabinets away from oxidizing materials.
Mechanical ventilation will be used, when necessary, to
remove accumulated vapors.
Flammable or Combustible Material
Flammable liquids have a flash point of 100 degrees
F or below. Combustible liquids, greases, and pastes
have a flash point of 200 degrees For below. Items
which are flammable and/or combustible include:
gasoline, oils kerosene, and other petroleum
stencil paints, marking inks, and printers ink;
solvents, thinners, primers, compounds,
varnishes and lacquers; alcohol, acetone, ether,
greases and pastes.
Except for drummed petroleum products, which may be
stowed in racks on the weather deck in accordance with
the Naval Ships Technical Manual, flammable liquids
and other flammable or combustible material will be
stowed in the flammable liquids storeroom.
Radioactive items listed in the MLN are identified
by special material content code R (or X if
radioactive and magnetic). Radioactive instruments,
electron tubes, and certain other items are labeled with
the conventional United States Nuclear Regulatory
Commission (USNRC) radiation symbol. This symbol
must NOT be removed or obliterated. The radiation
levels of radioactive material depend upon the type and