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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.

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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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\. : ,, ;... :;: ... - ... .... ' . .. .. .. .. .... ... ...... 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