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F C*J f
P
wh Tanks Corrado
Und rgraund steel
be en the tan tonic; corrode due to an
occu due to s k and the surrounding soil, of,
reecho
In th mall volts
flow of DC current from one (ocaflo The process of corroslo
voltage differences on the steel su
flows m the tank into the sop corrosion occu a rtace that result
the an de )n a corrosion circuit pother, Where current
tank, corrsion occurs, Where current flows
This location Is called
the a ant of current flowl me progress of corrosion is determined b m the 9011 to e
whefhe' th
e locations of the anode/cathode remain
g between the anode and the cathode and
Corrosl' rates are
conduc v14, to the soi generally higher in wet s) n Iron constant over time,
j circuit promotes the flow of DC current p the csince the
Corrosto''' corrosion
general o generally exhlbits itself on under
erail rusting or more commons ground tanks in either a
may rasa from me4lturgicai conditions
variations uc s of t ting attack Pit locations
concentra on, tc rocks, salts, fertilizer, mo store content at
ace or soil
Concentration, oxygen
Preventing Corrosion
Protecting underground
tanks from corrosion s
j easliyachisved bythe use
oftwo commonlyaAplied
protection
may' external methods:
cathodic Coating and
These two protection,
are methods
coating Insulate
the flow of Corn
external coating
no coating is par
t►nY defects, whh
Cathodic pmtech
DG current from
cathode, Appgcatl
;orroslon from oc,
zystems are sacril
isetl when the am
ucli as in undelm
re more commonl
pellnes. Electrical
id electrical grour
`activeness,
)w sacriticiai Gat
kcriicial systems
and should be easedMenIn
used in conjunction with the
other, An effective
the steel from the soli environment, thus prove
slop currentfronode protective
,anprotectove 89%,ofthetanksurtathe co ea. ntive
sect Da g Rn effective
ma a from constructlon or sole stresses create
h may result in accelerated corrosion at the defect.
m prevents corrosion at those defects b
an external source, forcing the tank to become
in of suftlolent DC current to the tank
tirring. The two general will prevent any
;lal and impressed currentpes of cathodic protection
aunt of current re stheacrificial systems are
Fund propane tanks. Impressed Urgent s small,
used for 'large structures such as large dameter
Isolation of the tank from metallic piping Systl3r
is is critical for the cathodic protection systemns
's
r Protection wori,s
by creating a galvanic connection between two
n different metals, The
which when coupled to set common anode
n magnesium to the teal results In p material !s
t •0.50 volts referenced to aT�e C current magnesia
open circuit flow from i
Potential of peer sulfate electrode The
of steel is abe
two me magnesium is about -i,55U
flow; tail together, the difference of to-1.80U. B The open Ciro,
to the tank that overco 1 to 1.25U volts exults !n connOctiug o f
the tank, With this c mes the natural corrosion cells that exist
arrant available to the tank, no corrosion occurs
Nagnesiutn Anodes or
There are a variety
Protection T°f anode sizes
High Aotenflal, a he pdmary alto s and alloys used for Cathodic
and has an o e H-1 ailo Yam designed
Y is produced as 1-1 (or AZM) and
is well suited for circuit i of ot", of approxim from recycled ma
Potential also Protection of under Y 1,ggU 9neslum
up to -1:8V, Y is 99/o pure magnesia ground propane tanks. This alloy
ohm.CT resistivity. 11oY should be used or soli having open circuit The High
ppllcatlons ovepyp,op0 The two most common anode sizes
of #12 1d171b, Theslzedeal nUsed for underground
then bat nsuiated wire !s attached g atlon relates to the MetalPropane
kfllled in a. mixture of to theght.
to lower the electrical resistance o fsum' anodes, Anodes are
low cost bentontte, and sodium sulfate
nonhazardous, electrically the anode
not ve o soll.l The
backflll is then Pack aged In a cation bag mixture is a
paper bag Actual shipping Wei Weight g and either a i' The anode and
lb. and 46 Ib, g of these anodes cardboard box or
with backiill Is 27
AApiscation Recommendations
Magnesium anodes can
conditions. The H., alloyis go underground tanks Provides size and 9enerally"ryeffective in most sort
on conservative design ntHyrecommendationsforvarlousszeitanksba
UP to 10,000 oh assumptions. g Chart
This chart covers soli conditions
m�centimetesed
r resistive
10,000 ohm -centimeter generally represent very d
of soil resistivi � Reslsfivlties higher than
fordesign recom can be performed throughrYsolls.
10,000 0 soli analysis. Contact hm-cm mendaere s in locations Where soil resistivit es a Ce us
or if there is no effective emerna1 coating on the
The red
propane service line from the tank to the house tank.
considered In the cathodic protection design,
Is plastic. All underground steel pipe should 6e a also must 6e
a corrosion resistant material . T d ' unless the service line
isolated at the house he service line should IbeCOated with
is less than 60' in len with an lnsuiating fltyng or union, electrically
9th, the tank loader Will provide sufficient current
to ,protect both lank and plea. For longer lengths of !
anode may be required at the house connections,
1.A pe, an additionai
If another metallic material such as co
the pipe should 6e eleetcicalty ,rotated per Is used for service Piping,
Connection. Gopperandsteelcreateaga�vaNccoup�ethatwillaace,orate
tom the task % 1ho « a��e corrosion of the steel tank when directly connected to copper piping.
Generally, copper piping does not require cathodic protection.
no size and quantf single anode is installed tY of anodes from application Fer on either tank it should blce
iltlple anodes ids of tank
See examples below. are talled, space them evA„ h .
shipped in either !h'
Remove outerco cardboard bo
'de /s supplied inntainerand burytheclo h baOr gged
"Wallng. Plastic bag, re
approximate, move plastic ba
as the cents lines to of the three feet fro g
Ph Permanent tank, Anodes m the tank
moisture, so gee allyhWork per
# anode, stretch
to a connection °ut the anode connection
With aPAroxlma a jint on the tank fill wi
Water on the y six Inches Plpe,
neoessa anode to satura theaAk-f Ill ani
Is wire of thetltate the anode.
tlon. Exam tank a low i'arec
Ales are with electrical
n'accessible iu e eta to Connect!op stud
coated On the
with a moisture Proof
'to the
nectfon is .,.__,. .
'ad do - • 'T ►n the of the tank fill
me• With access to the a
)f the tank can Include node
IflC he of measuremenlot
if the anodeusnA an•annr....__.
Under,%Uq
WQo«aele profeefiop reefing Proved
E4ulRment iUeeded: lire
& Black Lead Min. �lgital Voltmeter
Sulphate Nalf--Cell) 2 LOng, Reference Red Test Lead
Electrode (g Ape 12, Lon
STEP p: Usln
1s lack of the g a digital volt APer
lead co meter meterInsert the red
nnector to an uncoated e 2 °r test lead into 9 to the fill pipe m metallic volt DC scale. the Volt
(Do IUOT ultivalve, q area of the C11P red test
STEP.2:1 O neot to shroud] oodsolid connection a tank' preferably
and connect the a blacktest lead Into the ery Im
electrode Bad end POrtant,
STEP 3; R (h 001l), of the ►ead mtomon Jack on the in
Of electrod'move Protective a charged referentce necess e• Place porous cap from the porous
fank ary) at four locatlo Plug end Into Plug at botto
ta"k, and one at each a cations around the tank (one soli re m end
g readings, nd of the tank , (one o (move gross if
the soil, g ,moistens If difficuI n each side of the
STEP q; Record oil with water or df ty is e
least of all four g Y4 cell deepert're
all four readings
readings into
negative. {mote• adings should be on an appro-0.86pv then the fank is f the four readings are of -0.850VprIats or mope
not fully protected}, ne
��AP low (less Befits) .
STEP Charging, Refer -®pee E1®cfrolte
electrod' nserew and re
crystals, fl111a Add delft remove porous Plug end
color 9 electrode oomplelteJlied water tot °f new referee1
the tube dpOere should aiwa y the s he co
STEP N0T USE ys bee olutlon will turn blue
Position
: so th 0e porous pl'P WArERxcess crystals at the bottOr G
Position so that the plug end of also m °
and let stand for I hour bef Ous plug end a tac ne and piece In an u
to become co before use, T g in the down upright
tau/ion; DQ completely a sly saturated b his will aiiouv the Position
Iva
filet wVetrade tof ore use Porous plug
throughporous may cantad►/neteoatac,of/, roads plug.. Do aata//aW the s%yan b e/ts, or Mier
AfslpJputad dU. 8/ectrode to Ireezi absorpf/ga
Ideal for use as a first stage regulator on any domestic size ASME or
DOT container in propane gas installations requiring up to 1,500,000 o`P—SUP".
BTU's per hour: The regulator is factory set to reduce container UL
pressure to an intermedlate pressure of approximately 10 PSIG.
Ordering Information
Lvs4u3TR
LV3403TRV9 +Y4" F.NPT1. W RNPT +/,° 10 Over Outlet 1 500 000 PSIG a nn �.
Maximum flow based on inlet pressure 20 PSIG higher than the regulator setting and delivery pressure 20% lower then the regulator setting and delivery pressure 20%
Provides accurate first stage regulation in two -stage bulk tank
systems. Reduce tank pressure to an intermediate pressure of 5 to 10
PSIG. Also used to supply high pressure burners for applications like rOo
industrial furnaces or boilers. Also incorporated in multiple cylinder UL
installations.
Ordering Information
W
F. NPT ff
LYTe
Y."A
+/,^
POL 2,500,000 3/4
When used for final stage pressure control, must either incorporate Integral relief valve or separate relief valve should be specified in accordance
with NFPA Pamphlet 58.
Maximum flow based on inlet pressure 20 PSIG higher than the regulator setting end delivery pressure 20% lower than the setting.
Designed -to reduce first stage pressure of 5 to 20 PSIG down to
burner. pressure, normally 11" w.c. Ideal for medium commercial
installations, multiple cylinder Installations and normal domestic
loads.
Ordering Information
LV4403B4 Y
LV4403846 ++Y2" F. NPT
11" w.c.
LV4403B46R- #28 at 10 9" to 13" Over
W F. NPT Drill PSIG W.C. Inlet 935,000
LV4403B66 Inlet
LV4403B66R' 3� F. NPT
Backmount design
Maximum flow based on 10 PSIG inlet and 9" w.c. delivery pressure.
LV4403 Series
the setting.
51 O�L �
a I
LV4403B Series
Al
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