API-570 Practice Exam #3 Closed Book 1. Thickness measrement location !T"$ readin%s on a &i&in% s'stem indicate that the corrosion rate has increased. The ins&ector(s most a&&ro&riate res&onse is to) a$ *ecalclate the ins&ection inter+al o, the s'stem $ *ecalclate *ecalclate the &i&in% circit circit a+era%e a+era%e corrosion corrosion rate c$ chedle the next ins&ection in six months d$ *e&ort this chan%e in condition to maintenance /. hich o, the ,olloin% is not re2ired to e inclded in an ins&ection record s'stem a$ Pi&in% s'stem ser+ice4 classi,ication4 I nmers4 and ins&ection inter+als $ The name name o, the the &erson &er,ormin% &er,ormin% a nondestrct nondestrcti+e i+e examination examination c$ *eslts o, a nondestrcti+e examination d$ Total nmer o, T"s recorded in each &i&in% s'stem 3. En+ironmental crackin% noted drin% an in-ser+ice examination o, elds shold e assessed ' the) a$ Pi&in% en%ineer $ 6ondestrct 6ondestrcti+e i+e examiner examiner c$ Pi&in% ins&ector d$ Certi,ied eldin% ins&ector . hich o, the ,olloin% is an essential +ariale ,or shielded metal arc eldin% !"A$ eldin% &rocedre s&eci,ication !P$ a$ eldin% techni2e $ 8roo+e 8roo+e desi%n desi%n c$ 9-nmer d$ American eldin% ociet' class ,or ,iller nmer 5. hich o, the ,olloin% is not a re2ired markin% on a B-1:.5 ,lan%e or ,lan%ed ,ittin% a$ Pressre class ratin% $ Tem&eratre Tem&eratre ran%e ran%e c$ "aterial s&eci,ication d$ "an,actrer(s name o, markin% :. ;nctions here +iratin% &i&in% s'stems are restrained are lo%ical &laces ,or hich s&eci,ic t'&e o, corrosion or crackin% a$ Brittle ,ractre $ tress tress corrosion corrosion crackin% crackin% c$ En+ironmental crackin% d$ 9ati%e crackin% 7. The all thickness o, a < elo in a &i&in% s'stem installed in ;ne 1=7= as measred at inter+als shon in the ,olloin% tale)
;ne 1=7= ;anar' 1=>> ;ne 1=>= ;anar' 1==:
0./37 inch 0./// inch 0./0/ inch 0.1>7 inch
hat is the lon%-term corrosion rate o, this elo a$ 0.00/ inch &er 'ear $ 0.003 inch &er 'ear c$ 0.00 inch &er 'ear d$ 0.005 inch &er 'ear >. Pi&e ,arication eldin% ma' not e &er,ormed i, the eld area is) a$ 9rosted or et $ Belo 3/?9 c$ Ao+e 1/0?9 d$ In an inert atmos&here =. A caron steel &i&in% circit in castic ser+ice that as ori%inall' stress relie+ed) a$ hold e examined at tice the ins&ection inter+al o, s'stems that are not stress relie+ed $ hold e checked ,or crackin% ith ma%netic &article testin% c$ *e2ires Brinell hardness testin% at the ,irst ins&ection inter+al d$ hold ne+er e hammer tested 10. The most common ,orm o, corrosion nder inslation on caron steel &i&in% is) a$ 8al+anic corrosion $ 8eneral corrosion c$ tress corrosion crackin% d$ ocali@ed corrosion 11. eadle%s in a &i&in% s'stem shold e) a$ Ins&ected at the same inter+al as the rest o, the &i&in% s'stem $ Eliminated hene+er &ossile c$ Ins&ected e+er' three 'ears d$ Ins&ected at an inter+al that is hal, that o, the rest o, the &i&in% s'stem 1/. At lo eno%h ,le %as tem&eratres4 the sl,r dioxide4 sl,r trioxide4 and h'dro%en chloride ill condense to ,orm sl,ros acid4 sl,ric acid4 and h'drochloric acid hich can lead to) a$ Crackin% $ 8roo+in% c$ e+ere corrosion d$ Brittle ,ractre 13. hich o, the ,olloin% de,ines axiliar' small ore &i&in% !BP$
a$ eadle%s hich are 6P / and smaller $ BP lo-&ressre steam &i&in% s'stems c$ rain lines in secondar' &rocesses hich are 6P I and smaller d$ BP associated ith instrments and machiner' 1. hen a &i&in% ins&ector notices de,ormation o, a &ressre +essel all in the +icinit' o, a &i&e attachment4 the most a&&ro&riate action listed elo is to) a$ Take no action +essels are not the res&onsiilit' o, the &i&in% ins&ector $ *ecommend an immediate shtdon o, the nit c$ Check ,or &i&in% misali%nment d$ Calclate the alloale de,ormation accordin% to A"E ection III4 i+. 1 15. hat is the normal tem&eratre ran%e s&eci,ied ' API-570 here an inslated caron steel &i&in% s'stem is ssce&tile to corrosion nder inslation a$ Beteen /5?9 and 150?9 $ Beteen /5?9 and /50?9 c$ Beteen 150?9 and /50?9 d$ Beteen 150?9 and 00?9 1:. Accordin% to A"E ection Article /3 E-7=7./4 in de+elo&in% a T &rocedre4 all o, the ,olloin% items shold e considered exce&t) a$ co&e o, materialsDoects to e measred $ Personnel c$ r,ace &re&aration and co&lant d$ The ei%ht o, the T instrment 17. At the conclsion o, a &ressre test4 it is most im&ortant that the) a$ Testin% e2i&ment has een remo+ed and &ro&erl' stored $ Pi&in% is drained and dr' c$ Pi&in% s'stem is &ro&erl' ali%ned ,or o&eration d$ Pressre relie, de+ices ha+e een restored to o&erational condition 1>. The extent o, +eri,ication o, materials sed ,or re&airs or alterations o, allo' s'stems is determined ' the) a$ "aterial s&&lier $ ;risdictional athorit' c$ FnerDser or desi%nee d$ Pi&in% en%ineer 1=. 6e connections on existin% &i&in% shall ala's e) a$ Considered alterations $ ocated donstream ,rom an' control +al+es c$ esi%ned &er the a&&licale code d$ Examined ,ll' !100G$ ' radio%ra&h'
/0. Acce&tance o, a elded re&air or alteration shold inclde nondestrcti+e examination in accordance ith the a&&licale code and) a$ The onerDser s&eci,ication $ B31.3 s&eci,ications c$ A"EDA6I s&eci,ication d$ The %idelines o, the onerDser(s insrance carrier /1. hen inaccessiilit' &re+ents &lacin% the ima%e 2alit' indicator !IHI$ manall' on the sorce side o, a eld ein% radio%ra&hed4 hat identi,ication is &laced on the radio%ra&h to indicate that a ,ilm-side IHI as sed a$ IHI< $ B< c$ 9< d$ 9P< //. A&&ro&riate records ,or each &i&in% s'stem shall e maintained ' the) a$ FnerDser $ Athori@ed API 570 Ins&ector c$ Pi&in% en%ineer d$ *e&air or%ani@ation /3. Erosion-corrosion is dama%e that occrs hen corrosion contrites to erosion ') a$ *emo+in% &rotecti+e ,ilms or scales $ Pro+idin% &its ,or erosion to ork on c$ *emo+in% &aint d$ Creatin% rst that erodes aa' the sr,ace /. hile ins&ectin% ,lan%ed oints4 &articlar attention shold e %i+en to ,asteners. 9asteners shold extend com&letel' thro%h their nts. ack o, en%a%ement o, the nt shall not exceed) a$ "ore than the thickness o, one side o, the nt $ "ore that to threads c$ "ore than one thread d$ Jero the nt mst e ,ll' en%a%ed /5. 9or a tem&orar' re&air on-stream4 a ,ll encirclement elded s&lit slee+e is not recommended on a lon%itdinal crack nless the) a$ Crack ends are lnted ' drillin% $ *e&air method has een re+ieed and a&&ro+ed ' the &i&in% en%ineer c$ ine diameter does not exceed six inches d$ Crack is smaller than 1D/ inch and is not ithin the heat a,,ected @one o, a eld /:. Ins&ection records o, a &i&in% s'stem contain the ,olloin% in,ormation ,or one thickness measrement location !T"$) Thickness
Kears since installation
0.375 0.3/5 0.300
0L6e 5 10Lcrrent
hat is the short-term corrosion rate a$ /.5 mils &er 'ear $ 5.0 mils &er 'ear c$ 7.5 mils &er 'ear d$ 10 mils &er 'ear /7. In-ser+ice ltrasonic testin% measrements at the thickness measrement location &oints indicate thinnin% in the heat-a,,ected @one o, an elo-to-eld neck ,lan%e on a thirt' inch +a&or line. hat is the est method to determine the extent o, the deterioration drin% the next schedled dontime a$ Internal ins&ection $ ltrasonic scan o, the elo c$ &ot radio%ra&h o, the elds c$ 9ll radio%ra&h o, the elo />. The oner o, a nel' installed &i&in% s'stem does not ha+e an' data on &i&in% s'stems in the same or similar ser+ice. A,ter the s'stem has een &t into ser+ice4 the initial thickness measrements shall e made) a$ At the recommended maximm ins&ection inter+al in Tale I o, API-570 $ A,ter no more than three months o, ser+ice c$ A,ter no more than one 'ear o, ser+ice d$ A,ter no more than ,i+e 'ears o, ser+ice4 re%ardless o, the class o, circit /=. hat test is sed to determine a material(s notch to%hness a$ Im&act test $ Bend test c$ Tensile test d$ Elon%ation test 30. rin% radio%ra&hic examination o, a eld4 the ire IHI shall e &laced) a$ Adacent to the eld so that the len%th o, the ire is &er&endiclar to the eld $ Adacent to the eld so that the len%th o, the ire is &arallel to the eld c$ Fn the eld so that the len%th o, the ire is &er&endiclar to the eld d$ Fn the eld so that the len%th o, the ire is &arallel to the eld 31. hen the od' andDor closre &ressre tests on a +al+e are &er,ormed a,ter a +al+e is ser+iced4 the tests shold e in accordance ith hich o, the ,olloin% a$ API-51: $ API-5/0 c$ API-5=> d$ A"E B1:.: 3/. Time4 tem&eratre4 and stress are conditions that can case)
a$ En+ironmental crackin% $ Cree& crackin% c$ 9ati%e crackin% d$ tress corrosion crackin% 33. "easrements ,rom an ins&ection o, a Class 3 &i&e re+eal an actal metal thickness o, 0.35 inch. The calclated minimm thickness is 0./5 inch. I, the corrosion rate is /.5 mils &er 'ear4 the next thickness measrement ins&ection shold e ithin) a$ Three 'ears $ 9i+e 'ears c$ Ten 'ears d$ Tent' 'ears 3. A eldin% &rocedre s&eci,ication and its s&&ortin% &rocedre 2ali,ication record are sed to determine hich o, the ,olloin% a$ The elder(s ailit' to de&osit sond eld metal $ The elder(s mechanical ailit' hen o&eratin% eldin% e2i&ment c$ The elder(s ailit' to &rodce elds that are radio%ra&hicall' ,ree o, de,ects d$ That the eldment ill ha+e the re2ired &ro&erties ,or the intended a&&lication 35. hich o, the ,olloin% is not a re-rate< re2irement o, API-570 a$ *e-ratin% hen there is a chan%e in the &rocess ,lid $ alidatin% that the &ressre relie, de+ices are set at the a&&ro&riate &ressre c$ &datin% o, a&&ro&riate en%ineerin% records d$ Acce&tance o, the re-rate ' the ins&ector o, the &i&in% en%ineer 3:. 9iller metals are assi%ned 9 nmers) a$ To &ermit indiscriminate sstittion to sit &rodction $ To redce the nmer o, eldin% &rocedres and &er,ormance 2ali,ications c$ To increase the nmer o, ,iller metal t'&es that the elder can se d$ To allo ,or elders to 2ali,' ,or more than one em&lo'er at a time 37. 9eer T"s ma' e selected ,or hich o, the ,olloin% &i&in% s'stem a$ Painted &i&in% $ Pi&in% that is com&lex in terms o, ,ittin%s4 ranches4 deadle%s4 and inection &oints c$ Inslated &i&in% d$ on%4 strai%ht rn &i&in% 3>. hich o, the ,olloin% is normall' re2ired hen re-ratin% &i&in% to a hi%her &ressre a$ 9lexiilit' o, the &i&in% s'stem $ Pro&er settin% ,or &ressre relie, de+ices c$ Potential cree& dama%e d$ Potential rittle ,ractre
3=. hen a re&lacement &i&in% s'stem has a strctral s&&ort that as inade2atel' desi%ned ,or a h'drostatic test4 an acce&tale alternati+e is to &er,orm a) a$ ensiti+e leak test $ acm !ne%ati+e &ressre$ test c$ Pnematic test d$ 100G +olmetric examination o, all elds 0. hen notch to%hness testin% is &er,ormed as &art o, the 2ali,ication o, a eldin% &rocedre4 the test is &er,ormed sin% hich o, the ,olloin% tests a$ Brinell $ Im&act c$ Bend d$ Tension 1. A ,lsh &atch sed to re&air a Class I &i&in% s'stem mst meet all t hich o, the ,olloin% conditions a$ elds mst e 100G tested ' radio%ra&h' or ltrasonic $ The &atch mst ha+e ronded corners c$ The &atch 'ield stren%th mst e less than 0000&si d$ 9ll &enetration %roo+e eld is re2ired /. hen ma' a elder e 2ali,ied ' a &rodction eld in stead o, a co&on a$ hen six inches o, the elder(s ,irst &rodction eld &asses the s&eci,ied radio%ra&hic examination $ hen a co&on is remo+ed ,rom one o, the elder(s &rodction elds and &asses mechanical testin% c$ hen the elder has elded on &late steel ithin the &ast tel+e months d$ 6e+er elders ma' not 2ali,' ' this method 3. The thinnest T" readin% on a &i&in% s'stem is 0./1/ inch. I, the minimm &i&in% thickness is 0.1>/ inch and the oser+ed corrosion rate is 0.010 inch &er 'ear4 hat old the remainin% li,e o, the s'stem e a$ 1 M 'ears $ 3 'ears c$ 5 'ears d$ 10 'ears . mall ore &i&in% shold e ins&ected in accordance ith the re2irements ,or lar%ersi@ed &i&in% ,or) a$ All secondar' &i&in% $ All &rimar' and secondar' &i&in% c$ All &rimar' &i&in% d$ Class I &i&in% onl'
5. An ei%ht ,oot dee& trench is d% to ex&ose a section o, ried &i&e on hich T measrements are to e taken. hich o, the ,olloin% mst e com&leted &rior to &er,ormin% the examination a$ *emo+e all loose &aint and scale on the entire rn o, ex&osed &i&in% $ Ensre the sides o, the trench are &ro&erl' shored c$ Con,irm soil resisti+it' ithin ten ,eet o, the exca+ation d$ eri,' the o&eratin% &ressre4 tem&eratre4 and ser+ice :. 9or ne s'stems or ,or s'stems that ill nder%o a chan%e in ser+ice4 the corrosion rate shall e determined ' hich o, the ,olloin% a$ The to most recent thickness readin%s $ ata ,rom e2i&ment in the same or similar ser+ice as the ne &i&in% c$ ata ,rom e2i&ment adacent to the e2i&ment in 2estions d$ The di,,erence eteen the nominal thickness and the actal measred thickness 7. Fne o, the considerations ,or determinin% the amont o, ins&ection ,or +al+es in &i&in% s'stems is) a$ nsal corrosion or thinnin% noted drin% ser+ice or re&airs $ The nmer o, T"s on each +al+e c$ The ins&ection re2irement s&eci,ied ' the &i&in% class d$ *andom selection to ensre a re&resentati+e sam&le >. hich o, the ,olloin% ste&s shold e taken hen ins&ectin% a ried &i&e contained in a casin% &i&e that re2ires exca+ation a$ eri,' that ater andDor soil has not entered the casin% $ Exca+ate arond the casin%4 and +eri,' the thickness o, the casin% c$ *emo+e the casin% ,or ins&ection o, the &ressre carr'in% &i&in% d$ 6o ins&ection is re2ired ecase the casin% &ro+ides s,,icient &rotection =. hen can an ins&ector %i+e &rior %eneral athori@ation ,or re&airs on a &i&in% s'stem ithot a &i&in% en%ineer(s a&&ro+al a$ hen the re&air or%ani@ation ,ollos all re2ired &ro+isions o, A"E B31.3 $ 6e+er re&airs cannot e done ithot &rior a&&ro+al ,rom a &i&in% en%ineer c$ hen the re&airs are limited or rotine. &ro+ided the ins&ector is satis,ied ith the com&etenc' o, the re&air or%ani@ation d$ hene+er the onerDo&erator makes an' re&airs desired 50. I, the metal thickness o, a com&onent ein% measred is nder 1D> inch4 then it) a$ Cannot e accratel' measred $ Can contrite to redced accrac' o, di%ital ltrasonic measrements c$ Can contrite to redced accrac' o, &rolile radio%ra&h' measrements d$ hold onl' e measred sin% edd'-crrent techni2es 51. Pi&in% s'stems lackin% cathodic &rotection and ss&ected o, ha+in% external corrosion conditions shold e exca+ated to hat extent
a$ Ex&ose eno%h to assess hether the corrosion is locali@ed or extended $ nco+er /5 ,eet e'ond the ss&ected area o, corrosion c$ 9ll' nco+er 100G o, the &i&in% len%th and idth d$ Ex&ose a ten inch lon% section o, the to& hal, diameter o, the &i&in% 5/. hich ins&ection method is most a&&ro&riate ,or detectin% external chloride stress corrosion crackin% in astenitic stainless steel &i&in% s'stems a$ r' ma%netic &article $ i2id &enetrant c$ on%itdinal ltrasonic d$ *adio%ra&h' 53. A &i&in% s'stem that carries diesel ,el onto a ri+er ar%e mst e thickness measred at hat inter+al a$ Three 'ears $ 9i+e 'ears c$ e+en 'ears d$ Ten 'ears 5. Internal +isal ins&ection o, &i&in% is) a$ Ala's done sin% a remote +isal techni2e $ The onl' reason ,or condctin% ins&ections drin% ota%es c$ An im&ortant &art o, &i&in% ins&ection d$ 6ot normall' &er,ormed 55. hich ins&ection techni2e is most a&&ro&riate ,or a Class 1 caron steel &i&in% s'stems4 6P 14 that o&erates at /00?9 a$ ltrasonic thickness measrements $ *adio%ra&hic &ro,ile techni2e c$ Pressre testin% d$ Edd'-crrent testin% 5:. A P is selected ,or a re&air on cold ser+ice &i&in% and im&act testin% o, the eldment is re2ired. hich o, the ,olloin% isDare re2ired on the P a$ A record o, the eldin% data sed to eld a test co&on $ A descri&tion o, the re2ired re&air c$ All essential4 nonessential4 and s&&lementar' +ariale d$ The reslts o, mechanical testin% 57. A &i&in% s'stem as installed in 9erar' 1=>= ith an initial thickness o, 0./= inch. Thickness measred in A%st 1=== as 0./0 and it as 0.17 in 9erar' /001. The calclated retirement thickness is 0.131. hat is the remainin% li,e o, the &i&in% ,rom the date o, the last ins&ection a$ Fne 'ear $ To 'ears c$ 9or and a hal, 'ears
d$ 9i+e 'ears 5>. rin% +isal ins&ection o, concrete-to-air andDor as&halt-to-air inter,ace o, ried &i&in%4 that is not cathodicall' &rotected4 hat shold the ins&ector look ,or a$ 8al+anic corrosion $ Internal corrosion c$ Calkin% or seal deterioration d$ Bl%ed &i&e all at the inter,ace 5=. hen com&arin% the lon%-term and short-term corrosion rate4 hich one is sed in the remainin% li,e calclation a$ A+era%e rate $ Ni%hest rate c$ hort-term rate d$ oest rate :0. Be,ore eliminatin% all T"s ,rom a &i&in% s'stem4 the ins&ector shold) a$ etermine that the s'stem is non-corrosi+e $ isall' check ,or leaks in the s'stem c$ Con,irm that no corrosion nder inslation is &resent d$ Assme that the corrosion is ni,orm thro%hot the s'stem :1. hat is the recommended maximm ins&ection inter+al ,or inection &oint thickness measrements a$ Three 'ears or hal, the remainin% li,e4 hiche+er is less $ 9i+e 'ears or hal, the remainin% li,e4 hiche+er is less c$ etermined ' class d$ Ten 'ears or hal, the remainin% li,e4 hiche+er is less :/. Pi&in% ins&ection records that &ro+ide desi%n in,ormation and drain% shall e &dated e,ore hich o, the ,olloin% a$ *e&airin% a &ortion o, the s'stem de to corrosion $ *e-ratin% the s'stem c$ Com&letion o, a s'stem h'drostatic test d$ Thickness measrements are taken on the s'stem :3. A6T recommended &ractice 6T-TC- IA is considered a) a$ "anal ,or co+erin% 6E sa,et' &rocedres $ ocment co+erin% 6E &ersonnel 2ali,ication c$ ocment co+erin% 6E &rocedres d$ Procedre ,or +isal examinin% :. hat is the assi%nment o, a classi,ication to a &i&in% s'stem &rimaril' ased on a$ Proailit' o, corrosion o, the &rocess media nder &ressre $ Corrosion histories o, similar ser+ices in other nits
c$ 9lammailit' and en+ironmental conse2ences ,rom leaka%e d$ ocation o, the &i&in% s'stem in &roximit' to the other e2i&ment :5. The remainin% li,e4 o, an inection &oint4 is calclated to e 1: 'ears. hen shold the next set o, thickness measrements e &er,ormed a$ Three 'ears $ 9i+e 'ears c$ Ei%ht 'ears d$ Ten 'ears ::. h' are +ertical s&&orts4 constrcted o, &i&e com&onents4 checked to determine i, the' are ,illed ith ater a$ ater inside ma' case internal corrosion o, the s&&ort $ ater inside ma' case internal corrosion o, the &rocess &i&e c$ ater inside ma' case external corrosion o, the s&&ort d$ ater inside ma' case additional stress to e &laced on the s&&ort :7. I, the onerDser elects to &rioriti@e &i&in% s'stems ,or the material +eri,ication &ro%ram or needs to determine i, P"I testin% is needed at all4 consideration shold e %i+en to all t hich o, the ,olloin% a$ Conse2ences o, a ,ailre $ The reason ,or allo' s&eci,ication c$ ikelihood o, material mix-& drin% &re+ios &roect and maintenance acti+it' d$ The minimm and maximm desi%n metal tem&eratre o, the &i&in% s'stem :>. Chan%in% a nonessential +ariale in a P ill re2ire hich o, the ,olloin% a$ A ne PH* $ *e-2ali,ication o, the P c$ *e+ision o, the s&&ortin% PH* d$ *e+ision o, the P :=. nderct can est e descried as hich o, the ,olloin% a$ ack o, ,sion nder the ca& that a&&ears as a ct< on a radio%ra&h $ 8roo+e in the ase metal at the toe o, the eld c$ eld root is not com&letel' ,illed d$ Incom&lete ondin% eteen the ,iller metal and &arent metal nder the eld 70. r,ace condition o, ried &i&in% &aths shold e +isall' sr+e'ed at a&&roximatel' hat inter+als a$ ix months $ Annall' c$ To 'ears d$ Three 'ears 71. Fne o, the most common tests sed in eldin% &rocedre de+elo&ment is)
a$ The im&act test $ Acid etchin% test c$ Bend test d$ Positi+e material identi,ication test 7/. rin% an ins&ection4 'o ,ind that the &i&e shoes ha+e mo+ed o,, the main s&&orts and are han%in% on the eams &re+entin% the line ,rom retrnin% to its cold &osition. hat old e the most a&&ro&riate action ,or 'o to take a$ *e2est the &i&in% en%ineer to e+alate &i&e stresses $ *ecommend re&lacement ith lon%er shoes c$ &eci,' s&&orts desi%ned to allo more mo+ement d$ *ecommend anchors and sto&s in the s&&ort s'stem 73. oer soil resisti+it'4 on ried &i&in%4 the) a$ ess the need ,or cathodic &rotection $ 8reater the ins&ection inter+als c$ oer the &otential ,or soil moistre retention d$ Ni%her the external corrosion rate 7. *e-ratin% is ein% &er,ormed to loer the minimm desi%n tem&eratre. hich o, the ,olloin% is re2ired a$ Calclate the test &ressre sin% the alloale stress ratios $ Per,orm Brinell hardness tests on re&resentati+e sam&les c$ eri,' s'stem com&onents meet code minimm tem&eratre re2irements d$ *e+ie ins&ection records to ensre the s'stem is ade2atel' s&&orted 75. hich o, the ,olloin% materials re2ire h'drostatic testin% ith &otale ater or steam condensate a$ 300 series stainless steel $ "onel c$ 5Cr-1DD/"o d$ Caron steel 7:. A &i&in% s'stem carr'in% ,lammale &etrolem &rocess can e considered a Class 3 s'stem i, it contains hich o, the ,olloin% a$ Anh'dros h'dro%en chloride $ 9inished &rodct ein% &m&ed at a remote ooster station c$ Fn-site na&htha ith no h'dro%en sl,ide d$ aste %as sed to ,el an on-site heater 77. Accordin% to A"E ection IO4 elders ma' e 2ali,ied ' all o, the ,olloin% methods exce&t) a$ *adio%ra&hic examination o, initial &rodction elds $ *adio%ra&hic examination o, a test co&on c$ ltrasonic examination o, &rodction elds d$ Bend tests taken ,rom a co&on
7>. hat all thickness is sed to recalclate "AP ,or contined se o, a &i&in% s'stem a$ Actal thickness mins ,or times the corrosion loss ex&erienced since the &re+ios ins&ection $ Actal thickness mins to times the estimated corrosion loss e,ore the next ins&ection c$ Actal thickness mins the estimated corrosion loss e,ore the next ins&ection d$ Actal thickness 7=. The nmer o, T"s re2ired on hi%h tem&eratre lo +elocit' h'drocaron lines4 containin% sl,r corrosi+es4 are o,ten ,eer than on other corrosi+e s'stems ecase the sl,r lines) a$ Exhiit +er' ni,orm corrosion inde&endent o, location in the s'stem $ Are not considered to e a &otential en+ironmental risk c$ Corrode at sch a ,ast rate that the' are considered consmale and are re&laced on &redetermined time schedles d$ Are constrcted o, hi%h-allo' materials that arc nlikel' to erode >0. An im&er,ection o, a t'&e or ma%nitde exceedin% the acce&tance criteria is knon as hich o, the ,olloin% a$ iscontinit' $ 9la c$ e,ect d$ Indication >1. hat shold external +isal ins&ection o, ao+e%rond &i&in% ala's inclde a$ Bellos ex&ansion oints and &i&e han%ers $ Checkin% ,or ,%iti+e emissions c$ Thickness measrements at all ins&ection &oints d$ tri&&in% inslation ,or CI ins&ection >/. hat is the remainin% li,e o, an 6P 1/ &i&e considerin% the ,olloin% data "inimm re2ired thickness 0.1:/< Crrent actal thickness 0.1>=< Corrosion rate 0.005 inch &er 'ear a$ /.7'ears $ 5.0 'ears c$ 5. 'ears d$ 10 'ears >3. *e&air or%ani@ation elders and eldin% o&erators mst e 2ali,ied in accordance ith hich o, the ,olloin% a$ A"E B31.3 onl' $ A"E B31.3 or the P to hich the &i&in% as ilt c$ The crrent a&&licale code onl' d$ A"E B31.1 or A"E B31.3
>. Accordin% to API-5704 sstittin% s&ecial &rocedres ,or a &ressre test a,ter an alteration) a$ Is %enerall' acce&tale $ Is not &ermitted c$ *e2ires consltation ith the ins&ector d$ hall com&l' ith A"E B31.3 >5. The s&&ortin% PH* o, a P indicates a test as made4 sin% the "A &rocess4 on a 5D>< thick co&on. hat maximm &rodction thickness is the P 2ali,ied ,or a$ 0.:/5 inch $ 1.000 inch c$ l./50 inch d$ 1.750 inch >:. Tem&orar' re&airs shold e re&laced at the next maintenance o&&ortnit' the' ma' remain in ser+ice ,or lon%er &eriods &ro+ided) a$ It is a&&ro+ed and docmented ' a &i&in% en%ineer $ It is a&&ro+ed ' the onerDser c$ It is a&&ro+ed ' the ins&ector and &i&in% en%ineer d$ It is a&&ro+ed ' an API-570 ins&ector =3. ho is res&onsile ,or maintainin% the records o, eldin% &rocedres and elder 2ali,ications sed drin% a re&air a$ *e&air or%ani@ation $ FnerDo&erator c$ Ins&ector d$ Testin% laorator' =. hat is the case ,or reection o, the B< ima%e on a ,ilm de to excessi+e ackscatter a$ An' ima%e $ 6o ima%e c$ A li%ht ima%e d$ A dark ima%e =5. ho mst a&&ro+e all &ro&osed methods o, desi%n4 exection4 materials4 eldin%4 examination4 and testin% ,or &i&in% re&airs and alterations a$ Pi&in% ins&ector $ Pi&in% ins&ector or &i&in% en%ineer c$ FnerDser d$ Constrction contractor =:. Com&ter ased s'stems are se,l ,or storin% data relatin% to hich o, the ,olloin% a$ *e&air &rocedres
$ E+alation and selection o, eldin% &rocedres c$ Calclation o, short-term and lon%-term corrosion rates d$ E+alation o, all t'&es o, corrosion =7. F, the ,olloin%4 hich one is exclded ,rom the sco&e o, API-570 a$ Crde oil &i&in% less than six inches in diameter $ A catal'st s'stem less than :< in diameter c$ 9lare &i&in% d$ 9ireater &i&in%
