The Chronicle-star combined with the Moss Point advertiser., 1946-03-29

of not less than one hour. provided
mat where IN the opinion of the Chief
OF the Fire Department the hazard
IS more than moderate, based upon
a consideration of the quantity and
nature of the liquids involved and the
extent OF mixing operations together
with the construction of the build
ing n its exposures. construction hav-
ing a IRE resistance rating of not
less than two hours shall be required.
Door openings to the room shall be
equipped with approved automatic or
self-closing fire doors and shall have
slils raised at least six inches above
the oOm floor.
SECTION 800. STORAGE OF FUEL
OIL IN BUILDINGS.
The storage of Class III liquids in
buildings in connection with oil burn
ing equipment shall be in accordance
with the following. Tanks of not over
TWO undre and sseventy-five gallons
capacity each and having an aggrc-
gate capacity not in excess OF five
hundred and fifty gallons may be
installed without enclosures. Other
tanks shall be completely enclosed
with reinforced concrete not less thar
eight inches in thickness. with at
least a sfx-inch space on sides be.
tween tank and concrete insulation
filled with sand or we'll tamped earth
and with twelve inches of sand or
top of tank, either between tank and
concrete slab or above concrete slab
Inside of ar enclosure as above
described the tank may be encased
in reinforced concrete not less than
six inches in thickness, applied di-
reetly to the tank so as to complete
~ eliminate any air space.
SECTION $40. DRAWING LIQUIDS
FROM CONTAINERS.
Flammable liquids shall not be
drawn or handled in the presence of
any open flame or fire. Except as
permitted below, flammable liquids
shall be drawn from tanks, at point
inside buildings only by pumps or
other methods approved by the Chiei
of the Fire Department. Draw Off
pipes terminating inside buildings shall
have a valve at the discharge and;
when delivery is by gravity, the shut
off valve should preferably be of the
automatically closing type and in adj
dition an emergency. valve shall be
provided. .Draw-off devices for Class
I and ii liquids shall not be located
on floors below grade.
An approved domestic type oil burn
er may be supplied by gravity from
a tank of two hundred and seventy
five gallons maximum capacity. A
second tank may be provided If con-
nected to an approved three-Way
valve SO that not more than two
hundred and seventy-five gallons can
be discharged at any n time. Range
burners and room heaters may have
parometric- gravity supply, with tank
not exceeding six gallons, if of an
approved type.
The Chief of the Fire Department
may permit gravity flow OF fiamma-
BILE liquids in manufacturing and job
bling plants where the nature of the
business requires it.
SECTION 81. SMOKING PROHIB-
TIED.
Smoking or the carrying of matches
or other smoking material nirooms
where flammable liquids are handled
Is prohibited. Suitable mo SMOK-
ING" signs shall be displayed
SECTION 3l2 ABoVEGRoUND
STORAGE LIMITED.
The storage Of inffammable liquids
in outside a-boveground tanks is-here-
after prohibited within the following
limits: Mote these limits to be spe
Gifted: they should include the mer-
camille. and other eongested districts
and land near streams or other water
ways which would carry burning liquid
into congested districts.l
SECTION 313. CAPACITY AND LO-
CATION OF ABOVE GROUND
TANKS.
(al Outside a-boveground tanks shall
be so located that the distance be
tween shell of tank and property line
or nearest building is not less than
one and one-half times the greatest
dimension of the tank diameter,
length or height, provided that tor
tanks equipped with either an ap-
proved permanently attached extln-
gushing system or an approved float.
ing roof such distance may be reduced
to not less than the greatest dimen-
sion of the tank.
fb1 The minimum distance between
shells OF any two tanks sha be not
less than one half the greatest oil
mension diameter. length or height
of smaller tank except that such dis
lance shall not be less than three
feet, and for tanks of eighteen thous-
and gallons or less the distance need
not exceed three feet.
sEcTIoM b.; UNDERGROUND
undererocnd tanks Shall have the
top OF the tank not less tina two
feet below the surface of the ground,
except that. in lieu of the two foot
cover. tanks may be buried under
twelve inches Of earth and a. Q
nches in thickness provided, which
shall extend at least one foot beyond
the outline of the tank in all direc-
tions: concrete " TO be placed
on a firm. well tamped earth founoa-
ton. Where necessary to prevent float
ing, tanks shall be securely ancnor-
ed or weighted.
Where a tank cannot be entirely
buried, il shall be covered over with
earth to a depth Of az least two iees
with a slope on all sides not sleeper
than one and one-half feet horizontal
10 one foot vertical.
For liquids with flash point below
100 degrees F.. under ground tanks
having a capacity in excess Of i've
hundred and fifty gallons shall be at
least ten feet. and tanks having
capacity in excess of W thousand
gallons shall be at least twenty feet.
from every building the lowest floor,
basement. cellar or pit OF which IS
SECTION SIS. CONSTRUCTION OF
TANKS.
tanks shall he conformed to gener.
ally accepted good practice and shall
ne approved by the Cnlet OF the rfe
Department.
Tanks labeled by Underwriters La
horatories. Inc, and ank conform
ing to the standards of the Nationai
Board Of Fire Underwriters or the
American Petroleum Institute snai De
deemed To conform to generally &C
cepted good practice.
ta) Tanks shall be set on firm Y
dations. Tanks located inside puila-
ings and exceeding two Thousand ilve
hundred gallons capacity shall be SUD
ported Independently OF the floor con-
struetion Outside above ground tanks
more than n foot above ground shaii
have foundations and supports OF mas.
onry or protected steel. except mat
wooden ushions may be used.
fbl No combustible material hall be
permitted under or within ten ieet
of any outside above ground storage
tank. Electric motors. unless OF ap-
ternai combustion engines shall not
be placed beneath tanks or elsewhere
within the line of vapor trayel
SECTION 3i7. VENTING OF TANKS
fal An open galvanized iron bent
pipe arranged for proper drainage, OF
an automatically operated vent, shaI
be provided for every tank which
contain flammable vapor. The lower
end OF the vent pipe shall not ex-
Tend through the top into the tank
for a distance of more IMAM one
inch.