HomeMy WebLinkAboutDOMESTIC TANKSa� l � t t I, t L- ° 1 I y ( I � t r _' ,. _ \ - ', r 's ---•o�
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S" 'clome in )3lac!< plastic Or Willie
galvanized steel.
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Dual service optionsfor above or- underground a131Dlica1ions
• Option dll: Ready -Co -holy reel oxide durable hoovder coaLij,19 with black • polyethylene AGUG clorne'
Option 412: nbaveground option with steel 8" AGUG dome
• All valves arld flcat gauges are centered under dome
• 17E3bricdted to [Ile latest A.S.M-C, Code, Sacl.ion Vlll, Division -1
• Registered bvith the Naliorlal Board
• 1r72 liquid' level oulaOC valve orifice reduces refueling erriissions
• Vacuum pre pcnded io save Lisle, money and produr.t
71pplir.;11710 fr [d ral, slat,_, orlocat`regulationrc mast cnnfain specific rrquhemen(s rot
protective ruatings and cathodic protection. The (ourchaserancl inslallerare responsible
for compliance u!ith all federal, stale, local grid NFPA inrilis(ry regulatie fns. Cathodic
.PRAP tin is,required and coating must be continuouc and unrnterruptod and
comply with an loc�f, state or nntionol core.
www.l'i�mityConiainers,col-n Call-loil free: 888-558-8265
0 _
Qenfatning Our Waddd's
Lcnergy1N
eomon of the ASME code for
9880re Vessels, section Vlll
PA 68. , Division 1. Complies with
slot ao psig from .Y0° F to 125° F. All tanks
cua#ed to a foil (14.7. psl) vacuum, maybe
""Finish: Coated With epoxy red powder,
the epoxy powder must be burled). ForAonks coated
may be coated with TGIC powder, bVeground use,
cable federal, state or local regulations may con
tain
�c requirements for protective coatings and cathodic
'Hon, The purchaser and Installer are responsible f for
fance with all federal, state or local regulations,
All v
"dgls dlmenslons area
r Ama eG VESSEL
CAR
CITY'
OUTSIDE
DIAMETER
HEAD
OVERALL
12
��yg,
TYPE
LENGTH
45
(L
24"
609.E mm
ENO
5'. 6 13/18"
26
94�
L
u
31,5
Heml
1671.3mm
7'
800.1 mm
- 2 1/2"
D
2197.1 mm
2
8001.5".1 mm
Hemi
8r .1�31``
50o
1892
'
57.42"
Hemi
2736.9 mm
9' -10"
000
950.5 mm
2997.2 Inm
785,
; I
40.96"
1040.4 mm
Hemi 15' -10 13/16"
4846.6 mm
SS
OVERALL
HEIGHT
al. on
911.4 mm
3' - 7 1/2"
1104.9
3' - 7 1/211
1104—�+m
4' -1 7/16"
125`�m
4' - 4 5/16"
'244.6 mm
FLOAT WITHDRAWAL
GAUGE ' ORCE vALve
ANODE
CONNECTION
VILLVEER
M L77VALVE
%. NA
LA E
0ALVE
FtTT1NGS LAYOUT UNDER
DoMe
�IVaL, iNFOP ATlQN
LEG
WIDTH
LEG
SPACING
WEIGHT
QUAN 17yy
10 1/6"
3' - 0„
FULL PER
LOAD STAC
257,2 mm
12
814.4 mm
245 Ibs.
111.1 kg,
96 12
3/4"
323.9 mm
3' - 6°
1066,8 mm
4'72 Ibe.
63
12 3/4"
4' - 0 1/411
214.1
323,9 mm
1225.6 mm
6 Ibs,
266.7 kg,
46 9
15„
381.0 mm
63.011
1524.0 mm
871 lbs.
30 .6
16 114"
91.011
395.1 kg
'1rnm
IL18
2743.2 rn rn
1729 Ibs.
"ft. _ .
5
Raw Jan. 27, 2016
in
the
the flowof
external cc
no coating
tiny defect,
Cathodic Pl
DC current
cathode, Ap
corrosion fr(
systems are
used when t
such as In 0
We more co
ripelines. EI
,nd electric
►;ranks Corrode
rgr°und steel tanks corrode due to an electroch
�een the tank and the surrounding sal(. The em(cal reaction different metals,
s due to small voltags differences on the stet su The most common anode
process of corrosion which when coupled to steel results in DC material is magneslur
flow of DC current fro magnesium to the at, T
m the tank into the s it corroslanioccura Thl rtace that result he open circuit potentialnof flow
elf is ab tl
another, Where current -0'S0 volts referenced to a copper sulfate electrode. The o
,ode In a corrosion circuit s location is called . potential of magnesium is about -1,g6 fa to - or
o corrosion occurs. Where Currentfiows from the soil to the tW0 metals together, the difference of 1 to 1.80V g pen circui
,runt to current flowing between the anode and ress Of corrosion thdetermined b fiow to the tank that overcomes the natura y CQnnecttng thr
3rthe locations of the anode/ cathode rey the tank With this current ava(lable to 1.26V volts results In currern
e cathode and I corrosion cells that ex(st on
Ion rates are generally higher in wet soil envlron constant nts ertime, the tank, no corrosion occurs.
NV11Y ofthe soli promotes the flow t DC current m the Magnesium Anodes
since
the There are a variety of anode sizes and alloys
m generally exhibits itself on underground tanks in two Primary all are designed as y 1d for cathodic
Nigh Potential. The H-1 alloy Is produced from recycled AZ83
�verali rusting or more commons a e(fher a and has an °pen circuit potential of approximates _ ) and
ult from metallurgtcas condstio s, of Pitting
suck. Pitlo a ions Is wall suited for protection of underground pro a magnesium
such as rocks, salts, fertilizer, moisture concensurlon, ° e Potential alloy )s gg �o y 1.66V. This alloy
Man, etc. Ii up to -1.8V. pure magnesium having an open circuit pot Nigh
oxygen ohm- Thts alloyshould be us d
Preventing Corrosion
Protecting undergroun
tanks from corrosion 1
eaellyachisved bythe Use
oftwo commonlyaPPlled
protection methods:
extemal coating and
cathodic protection.
These two methods
are complementary
and should be used in
conjunction with the
other, An effective
rs lone steel from the soli snvlm mrnai nt thus preventing
isson currentfrcanom the anode to the cathode, An e°tecttve
ebt. tectover99%Of thetanksurfacearea. Howe ev re
chi Damage from oonstruction or soil stresses create
chi may result in accelerated corrosion at the defect
Run prevents corrosion at those defects b
°m an external source, forcing the tank to applying
cation of sufflclent DC currentto the tank will prevent any
loccurring. The two general types of cathodic protection
crifidial and Impressed current, Sacrificial systems are
1amount of current required for the protection is small,
erground propane tanks. Impressed current systems
ionly used for large structures such as large diameter
4cal;tsolatlon of the tank from metallic I Ifs systems
'ounds is critical for the cathodic Protection piping
systems
taw Sacritlrill Cathodic Pratection Works
)aCt'Iftcial s�iMet's workby creating agalvanic connection between two
cm resrsttvlty. a frrsoil applications over 10,000
The two most common anode
d tanks are 91b. and 171b. $ites used for under
ground 10' rf 12 The size designation relates to he metal propane
s then bacl#►lT iInssulatedn a mre re is attached to the anodes, e to lower the electrical resistance of the anode totsoll, T Anodes are
low cost, nonhazardous, electr(cat(y conductive bacilli d sodium sulfate
backfill (s then packaged in a cotton bag and either Ica he anode is a
Paper bag, Actual shipping1. cardboard
box or
lb. and 46 lb. weight of these anodes with backfillis 27
Appilcatlon Racommendalions
Magnesium anodes can protect underground tanks
conditions. The H-1 alloy is generall ve In mast soti
Provides sizervat and quantityrecornmendations forvarloussize tanks base
on conservative design assumptions. T� effective. The following ohart
up to 10,000 ohm -centimeter resistivl d
10,000 ohm -centimeter generally re resters chart covers soil conditions
ty, Resistivitiss higher than
of o soil resistivity can be performed through soil analysis. for design recommendations in locations wt very dry sobs. Verification
10,000 ohm -cm, or it there is no effective external croon contact us
here soil resistivities exceed
The propane service line from the tank to the house g on the tank.
considered In the cathodic protection design, unless the service line
Is plastic. All underground steel pipe should , unless
also must be
a corrosion resistant material. The service line should be electrically
Isolated at the house with an Insulating fitting line
shuniould b coated with
Is less than 50' in length, the tank anodes will provide sufflclent current
to protect both tank and pipe. For longer lengths of PIPe,
(f service pipe
anode maybe required at the house connections. p P an additional
If another metallic material such as copper is used for service Piping,
the pl�e Should he eta jtatated from the <ark �+� rho t��� p�
connection. Copperartdstealcreaieagal�anlccouptethatw111accelerate corrosion of the Steel tank when directly connected to copper piping.
Generally, copper piping does not require cathodic protection.
Under Dome
-_...,,•y, c maitp oarrentde�s�ly, and 30-
si2e and quantity of anodes from application
ilia anode is Installed, It should bplatd
on either side of tank located r
ale anodes are Installed, space them evenly
'e examples below.
-- ""'"Nd° in either cardboard boxes or
lks. Remove Outer container andbu multi -wall
anode is supplied In plastic bag ry the cloth bagged tailing. remove
des: approximates Plastic bag
as the contorting k and
of tine e f feet from the
th permanent Anodes work best
moisture, so generallythe
e anode, stretch out the anode connection desPer
to a connection point on the tank fill pi
f with approximately six Inches of backFfli wire
f Water on the anode to saturate the re
necessary to activate the anode, e d
ode wire Prepared
cflon. Examples tank with a low
iY accessible p are thfeaded stud ion the
'ons should bmetallic coted connection °p the
With a mnipoinf to
the
in the area of the tank fill
access to the anode wire,
Include measurement of
rmanra
Cathodic protection resting Proced Equipment lyeeded: Digital Voltmeter, tare
& Black Lead Min, 2' Longs Reference Electrode Sul h c Red Test Lead Mtn 12' Lon
p ate Half --Cell) g
STEP d® (copper/Copper
't: Using a digital volfineterinsert the red test
Jack of the meter and select the 2 or
lead connector to an u 20 volt pC lead into the Volt
to the fill pipe multfvalvnco uncoated metallic area of the tsealank Clip red test
(00 NOT connect to shroud] 00d solid connection is Very P
STEP Z: In5ertthe black lead Into t 'preferably
and co . ry rmPorfant,
con the opposite end of the lead
Common
electrode ('� cell). Jack on the meter,
STEP 3, Remove a charged reference
Of electrode, protective cap from the
necessary)Place porous plug end into native soil { at bottom
at four locations around the tank (one on re end
tank, and one at each and of the tank). s grass if
obtaining readings, moisten soil with h side of the
the soil, if difficulty is encountered
STEP 4: Record all four water or dig Ya cell deeper into
least of all four read►n s
Meter readings on an appropriate for
negative, {Moto, Ilan A should be m. T0.86ohe negative then the tank iOf s not our readinl$ um of-O.8sov
gs are below or more
fully protected}, (loss negative)
Charying Reference Electrode
STEP �: Unscrew
electrode, and remove porous
crystals, fllling electrd8lode completely.r distilled ater lug to d of
new reference
color and there should aiwathe copper sulfate
the tube. Ys be cesseo o1ution will turn blue in
STEP b Replace NOT USE TAP WATER. "tale at the bottom
Position so that Porous
pos as A end of electrode of
and let stand for 1 hour "Plug a d is facing and place In an upright
to become com This will allow the position
�auplom, Do na�a%%e%spode io couse
a e� Porous plug
suhstances that may conlaminafe
throe h ct oil, roadsa/ts, orotber
9 pnroUsplA& 00 not alloWB/en r e/utlon ,y
to freeze absorpgon