Propane is a liquefied petroleum gas and aromatic
hydrocarbon that may be utilized as a gaseous fuel.
Propane's best known hydrocarbon neighbors are
methane (natural gas) and butane (disposable
cigarette lighters). Unlike methane vapor that is
lighter than air, propane vapor is heavier than air.
Unlike liquid butane that will not vaporize at
temperatures less than 32 degrees Fahrenheit, liquid
propane will vaporize at any temperature above -44
degrees fahrenheit. A gallon of liquid propane
weighs 4.24 pounds and contains 91,650 BTU's.
Propane, and all other hydrocarbon based fuels, must
be kept away from open flame(s) and ignition
sources. Propane must also be handled with care,
transported properly, and stored safely.
The majority of propane consumed in the Northeast is
produced in the United States and Canada. Liquid
propane reaches your home via a network of
pipelines, rail cars and delivery trucks. Your
Weaver propane system has been installed in
NFPA Pamphlet #54 ,
NFPA Pamphlet #58, and any applicable state or
Propane is sold as a liquid (U.S. gallon), by the
pound, or as a vapor by the cubic foot. Your
residential appliances consume propane in its vapor
form. Propane vapor reaches your appliances through
your propane distribution system. When your Weaver
propane system was installed it was determined to be
100% safe and leak free. Absolutely no alterations
or modifications should be made to your propane
system by anyone other than Weaver authorized
WARNING! The slightest modification or
alteration to your propane system by
unauthorized personnel may cause a
potentially dangerous or
Any propane system may develop faults that will
allow propane vapor to escape. Propane vapor most
often evidences itself via its distinctive
unpleasant odor. The presence of propane's
distinctive odor indicates that propane vapor is
likely to be present and a potentially dangerous
situation may exist. Should this situation ever
present itself, extinguish all open flames and
immediately leave the area where the odor is
present. Do not touch any electrical switches or
appliances. Go directly to your propane system's
storage vessel, open the tank hood and close the
vapor service valve. Under no circumstance should
the vapor service valve be left open or be
re-opened. Proceed immediately to the nearest off
premise telephone and contact us for further
In rare instances, certain individuals may be unable
to detect propane's odor. In these situations, an
electronic leak detector should be utilized.
Propane Safety Rules
Propane vapor is heavier than air. As such, in the
event of an unintended release of propane vapor, the
vapor will migrate to the lowest point. For example,
your basement or crawl space.
Do not tamper
with your system's supply lines or appliances.
Do not tamper with any safety devices,
regulators or storage tank fittings .
Familiarize yourself with the location of your
storage tank's vapor service shutoff valve.
Installation or repair of propane gas appliances
or equipment must be performed by a qualified
Never test for a
propane leak using an open flame. Only suitable
leak detection solutions may be used. These
solutions are available from Weaver Gas.
Propane must ALWAYS be handled with CAUTION. In the
unlikely event that a propane leak should occur,
take the following steps:
a. Immediately shut off the storage tank's service
b. Eliminate all possible outside sources of
c. Do NOT turn on any light switches.
d. Do NOT use a cell phone or any other electrically
operated communications device.
e. Exit the building and IMMEDIATELY call 911 from
another location (e.g. a neighboring building).
f. AFTER calling 911, call Weaver Gas immediately.
When produced, propane is colorless and odorless.
For safety and detection purposes, a chemical
odorant (ethyl mercaptan) is added to propane. The
presence of the odorant alerts you of a potential
propane gas leak.
Under certain circumstances, the odorant in propane
gas may oxidize and lose it's distinctive odor. This
odor fade can occur in new steel containers when
first placed into service and in older steel
containers that have been left open to the
atmosphere. Not all people are able to detect the
presence of the propane's odorant. Physical
conditions such as competing odors, colds, flu,
allergies, or smoking may diminish a person's
ability to detect the odorant.
If you think that you cannot detect the presence of
the odorant, or if you have an impaired sense of
contact us. A
service technician will verify the presence or
absence of odorant present in your system. If you
suffer from and impaired sense of smell, consider
the installation of an electronic gas detector.
Only AGA approved appliances that are properly
installed and adjusted may be connected to your gas
system. A properly adjusted gas appliance produces
carbon dioxide and water vapor as by-products of
combustion. Improperly adjusted appliances are
dangerous and can produce, among other things,
Never attempt a "do it yourself" repair on any
gas appliance. Only qualified technicians should
attempt the installation or repair of gas
appliances. If you are experiencing a problem with
any of your gas appliances please
contact us. One
of our technicians will correct the problem.
Your Regulators and Distribution System
As the ambient temperature rises, propane vapor
pressure rises. When the ambient temperature drops,
propane vapor pressure drops. To alleviate this
temperature induced fluctuation of vapor pressure,
your first stage regulator and second stage
regulator (or if utilized, integral two-stage
regulator) maintain a constant service pressure to
The first-stage regulator is attached directly to
your container's vapor service valve. The first
stage supply line connects the first stage regulator
to the second stage regulator, which in turn, is
connected to the interior distribution system that
your appliances are connected to.
Your regulators are installed in a specific manner.
This is done to alleviate premature failure due to
atmospheric or anthropomorphic conditions. When your
regulators are operating, they emit a very slight
sound similar to wind blowing. This is perfectly
normal and no cause for concern.
Never attempt to repair a regulator.
Regulators are constructed in such a manner as to
preclude their reassembly. Please
if you believe that you are experiencing
A blocked regulator vent can result in
elevated gas supply pressures. Regulator failure
could ensue, which may result in injury and/or
General Container Information
Propane is sold and stored in portable DOT
containers or fixed placement ASME containers. When
a container is filled to its proper liquid level it
will be approximately 80 percent full. The remaining
20 percent of the container's volume contains
propane vapor. This is the propane vapor consumed by
The vapor space in the container also provides room
for the expansion of liquid propane. Liquid propane
has a moderately high coefficient of expansion and
accordingly, expands greatly when subjected to
If a container is filled beyond it maximum
permitted liquid filling density, a situation
may develop in which there will not be enough
space available to accommodate the liquid
propane's expansion. When an overfilled
container is exposed to any temperature
increase, the following hazardous conditions may
The hydrostatic relief valve may actuate
(open), discharging liquid propane to the
Liquid propane could enter your system's
distribution lines. This would result in
higher than normal operating pressures to
If the container becomes hydrostatic, and
the hydrostatic relief valve fails to open,
the container could rupture, resulting in
serious injury or property damage.
Container Handling and Safety
When transporting your propane gas container, or
storing it for future use, a few simple precautions
must be followed:
Never use, store, or transport containers in the
passenger compartment of your vehicle.
Never store a container inside a building,
including your garage. Containers should be
stored outdoors and off the ground on a
non-combustible base. The container's vapor
service outlet should be plugged.
Propane gas containers must be transported in an
upright position. This allows the hydrostatic
relief valve to remain in the container's vapor
space at all times. Only a container designed
for horizontal use may be transported
When transporting a container, the container's
vapor service outlet must be plugged or
protected. The container's vapor service outlet
is a female POL type connection.
Any container that is damaged, corroded, exposed
to fire, or appears to be leaking must be removed
from service immediately. If you have a
defective, damaged, or leaking container,
and a trained technician will remove it
WARNING! Only properly trained technicians may
engage in container refilling.
New containers must be properly purged by a
qualified technician prior to their initial filling.
This insures that your appliances will operate
properly. The presence of oxygen in an improperly
purged container can diminish the containers odorant
level and cause excessive pressures. Once a
container has been properly purged, the vapor
service valve must remain closed, except when in
Containers are filled by weight or fixed liquid
level gauge to prevent overfilling. It is
imperative that your container be filled by a
The exterior of your container should be protected
with light-colored, heat-reflective paint. This will
reduce pressure increases as ambient temperatures
rise. A proper exterior coating will protect against
rust and corrosion. Aluminum containers do not
When taking advantage of Weaver Gas rental tank
service, all container maintenance is provided free
Industry Efforts to Safeguard Propane Use:
GAS Check® is an
inspection program developed by the National Propane
Gas Association (NPGA) and the Propane Education &
Research Council (PERC), and funded by PERC that
provides guidelines to technicians on how to perform
two different types of residential safety
A “Gas System
Check” which must be completed on the gas
delivery system, including the containers,
regulators, and appurtenances; and
Appliance System Check” which includes all of
the items of a “Gas Systems Check” as well as on
all propane-burning appliances. GAS Check® also
educates homeowners on the safe use of propane
and the maintenance of propane appliances.