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TechnicalNoteN-700 A SURVEYOFPIPECORROSIONATNAVALACTIVITIES BY
J.H.Stephenson 26March1965 1 J Mf_CROFfCHE$./ .s()
U.S.NAVt\LCI.\f!.L WORAtORY Alon:HucnetM, i{;nn ia __-:? ,:j-r . ..
" -- ' . . . . ; r. ? .. } . ' . ., .. ' ' . . . ., lj '. . '. ' .
. # ASURVEYOFPIPECORROSIONATNAVALACTIVITIES Y-B007-08-0l-004 TypeC
J.M.Stephenson 'r'Odetenninetheeffectivenessofmethodsusedia
thefieldtoprotect
pipelinesystemsfromcorrosionwithinagroupofgovernmentactivities,
engineersfrom.theU.S.NavalCivil&gineeringI.e.boratorymadeon-site.
investigstionsofpipingdistributionsystemsat.otaloftwenty-three
NavaJ.locatedinvariousplacesof the coast,Atlantic
coast,gulfcoast)Hawa.HandinlandCalifornia..'lhedatacollt!ctedfrcm
thesUesvP.remorecOUllllonlyfromservicepipelinessuchasstee.11,hot
vater,potablewater,seawater,sewage,air,gasandoilOnehundred
andsixpipe wereinvest1getei. eatosite,
soilcharacteristics,typeofcoatingorcovering, ufinatallation,
lengthofpipeinvolved,andreportsonthesuccaasorfailureofthe
systemsarerecordedintabularformandenteredinAppendixesA andB.
'l'hemootseriousfailuresreportedareinundargroundhotpipelinesystems
wheN,tnmostcasM,thelinesare:in:3talledbelowthewatertable.
ru:::..t..\SEtOTHECLEARlr\GUOUSElSAU1'110RlZcD.
I ..
I .._.\.', ...... ..... .... . .. I'' ..... 0: I"' .r, Io
IJstactvisitedhaveatleastsome wherethesoil isvery
2.r.auurcsinundcrgrt.Hmdheat.distributionsystemslocatedbelow
thevatcrtableconstitutedtho=ost corr->sionproblccuem:oontcrcd
inthestudy. 3.Ho.:atdi:H:ributionlocatedJ.ntrenches thetable
h;a.vc\'CtJ'Httlccorf'osioaresulting the environ-SDCnt .:..Theuscof
at::incshas reduced incidence l)fi.ntilt"nal incondensatehovover,
l:";;&tc&
archighthea=inottcata:cntC\oiiynotbethetl10stcconoaaica.l ).In
testepoxy-glassbasgivenexcellentservice
ingravityflowcondensatelines. 6.Pipesunder
are.aprobl.eaatcostshoreestablish=cnt.s. 9 ....... :-. ..
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-$: ... .... ..1."' ." ... ........ . ... .. ... ... "...
.. ....I ..... . . ..... ....1.. =- -.., t)
... \. ;,.. ...
- - ........J .. , ... .. . . .. 4..,."
\. : ,, ;... :;: ... - ... .... ' . .. .. .. .. .... ... ......
7.Sewersystemsinstalledwithminimumslopetailures
whenthepipeswerenotresistanttosewergasattack.
8.Manyactivities,particularlyalongthconoolOIIIwaar..tlJ
,......_.tllr-'> c.he UNof -loa:tt1Ptb&Ya .ozo.e..,._.c:al
toar&du.ally allfarrouacoa.deaMtaUaaa
"lthcoMraDd..v.cotof-.teetreat:Mftt. 'fhaccal,t,.
fatl..ta.rc:,,ra.atl,lbut-ul cODdu:tt -bad lrtact ..... cona,,,. -
,..uodtbroqb eoa.dutt'onrcoaAltaMCaiN. lllthb9-tho ,,,.
faUodbten&llJeod- re-placedv:tthwrouahttroa.
Inrac-.-at1ra._.rou..faUurhave -.r.
thaplpooJolnthotrapa.ltlalnotalletlooahan -laplaceoc.h'Sor6year'
wcr&lif.ill.a Vft'e notbetaau.-..d. Eat te-acond.e-o..caayae.-
ia&dlyd.atartoreted an aat:l.a.cadl$200,000r
..utn.toreplaceit..Valu.of coa.dl'rl ...tat.about$2:S,OOO per,
...,,coraa..u.eatly enat.naaraatIO.USOlVDOCISfRetitalahtbe.ore
econa.tcaltocf..-ptheconden..tathaDtoreplace andintet.nan.vYt-.
Jn1956thepi,..tailed:tntern.el11aJldbadto.;,; r ...
placed.C&uaavaaat:trt.butritom2 chaaaelllq Inl9'%....c..4,
1600'ofXat:qaaVI'Ot.l&ht1n1946theps.,.faUadcf.uao
tolaeerneleonoat.oe ..1roa,t,., 11/2"co, .. weretnacal..I.Acll
of..caru ..e..at ....forraptdled.latu.aael. c::ondn.Mt.a,,,.. -r
ortat.nellyLD n. laclr.ofaaNl'lJ'..cercr..c..otprosr- led.ta
tun-cotta ooecl"ltlntoZ'MlfeUuraaU.tha--- ,s,.. eodthe
1..11.&& of..cel.atodll t..1to.. taraal
fetlur-taofthe,,,.... zz.aoo..... ch ...uwr.,&&ced"' lY"
t.e .-....... torI"' C.&c.a,c...... l..., t'U.lcAVTJUta
lkM'f...non 1 . ,_t kttwltpOrf.sS..Uyu.u acUlJ.,...n,ooo -
OFL-o,w.f :. Pl.-t.tlcsPipes t.a