Ti nker AFB, OK TAFB Techni cal Spr ci f i cat i ons 2019

SECTI ON 26 42 14. 00 10

CATHODI C PROTECTI ON SYSTEM ( SACRI FI CI AL ANODE)

04/17

PART 1 GENERAL

1. 1 REFERENCES

The publ i cat i ons l i s t ed bel ow f or m a par t of t hi s speci f i cat i on t o t he ext ent r ef er enced. The publ i cat i ons ar e r ef er r ed t o wi t hi n t he t ext by t he basi c desi gnat i on onl y.

ASTM I NTERNATI ONAL ( ASTM)

ASTM B418 ( 2012) St andar d Speci f i cat i on f or Cast and Wr ought Gal vani c Zi nc Anodes

ASTM B843 ( 2013) St andar d Speci f i cat i on f or Magnesi um Al l oy Anodes f or Cat hodi c Protection

ASTM D1248 ( 2012) St andar d Speci f i cat i on f or Pol yet hyl ene Pl ast i cs Ext r usi on Mat er i al s f or Wi r e and Cabl e

NACE I NTERNATI ONAL ( NACE)

NACE RP0193 ( 2001) Ext er nal Cat hodi c Pr ot ect i on of On- Gr ade Car bon St eel St or age Tank Bot t oms

NACE SP0169 ( 2015) Cont r ol of Ext er nal Cor r osi on on Under gr ound or Submer ged Met al l i c Pi pi ng Systems

NACE SP0177 ( 2014) Mi t i gat i on of Al t er nat i ng Cur r ent and Li ght ni ng Ef f ect s on Met al l i c St r uct ur es and Cor r osi on Cont r ol Syst ems

NACE SP0188 ( 1999; R 2006) Di scont i nui t y ( Hol i day) Test i ng of New Pr ot ect i ve Coat i ngs on Conduct i ve Subst r at es

NACE SP0285 ( 2011) Ext er nal Cor r osi on Cont r ol of Under gr ound St or age Tank Syst ems by Cat hodi c Pr ot ect i on

NATI ONAL ELECTRI CAL MANUFACTURERS ASSOCI ATI ON ( NEMA)

NEMA TC 2 ( 2013) St andar d f or El ect r i cal Pol yvi nyl Chl or i de ( PVC) Condui t

NATI ONAL FI RE PROTECTI ON ASSOCI ATI ON ( NFPA)

NFPA 70 ( 2014; AMD 1 2013; Er r at a 1 2013; AMD 2 2013; Er r at a 2 2013; AMD 3 2014; Er r at a 3- 4 2014; AMD 4- 6 2014) Nat i onal

Apr i l 2019 Page 1 SECTI ON 26 42 14. 00 10

El ect r i cal Code

U. S. NATI ONAL ARCHI VES AND RECORDS ADMI NI STRATI ON ( NARA)

40 CFR 280 Techni cal St andar ds and Cor r ect i ve Act i on Requi r ement s f or Owner s and Oper at or s of Under gr ound St or age Tanks ( UST)

49 CFR 192 Tr anspor t at i on of Nat ur al and Ot her Gas by Pi pel i ne: Mi ni mum Feder al Saf et y St andar ds

49 CFR 195 Tr anspor t at i on of Hazar dous Li qui ds by Pipeline

UNDERWRI TERS LABORATORI ES ( UL)

UL 510 ( 2005; Repr i nt Jul 2013) Pol yvi nyl Chl or i de, Pol yet hyl ene and Rubber I nsul at i ng Tape

UL 514A ( 2013) Met al l i c Out l et Boxes

UL 6 ( 2007; Repr i nt Nov 2014) El ect r i cal Ri gi d Met al Condui t - St eel

1. 2 SUBMITTALS

Submi t t he f ol l owi ng i n accor dance wi t h Sect i on 01 33 00 SUBMI TTAL

PROCEDURES:

SD- 02 Shop Dr awi ngs

Drawings Cont r act or ' s Modi f i cat i ons

SD- 03 Pr oduct Dat a

Equipment Spar e Par t s

SD- 06 Test Repor t s

Test s and Measur ement s

SD- 07 Cer t i f i cat es

Cat hodi c Pr ot ect i on Syst em Ser vi ces of " Cor r osi on Exper t "

SD- 10 Oper at i on and Mai nt enance Dat a

Cat hodi c Pr ot ect i on Syst em Tr ai ni ng Cour se

Apr i l 2019 Page 2 SECTI ON 26 42 14. 00 10

1. 3 QUALI TY ASSURANCE

1. 3. 1 Ser vi ces of " Cor r osi on Exper t "

Obt ai n t he ser vi ces of a " cor r osi on exper t " t o super vi se, i nspect , and t est t he i nst al l at i on and per f or mance of t he cat hodi c pr ot ect i on syst em.

" Cor r osi on exper t " r ef er s t o a per son, who by t hor ough knowl edge of t he physi cal sci ences and t he pr i nci pl es of engi neer i ng and mat hemat i cs, acqui r ed by pr of essi onal educat i on and r el at ed pr act i cal exper i ence, i s qual i f i ed t o engage i n t he pr act i ce of cor r osi on cont r ol of bur i ed or submer ged met al l i c sur f aces.

a. Such a per son must be accr edi t ed or cer t i f i ed by t he Nat i onal Associ at i on of Cor r osi on Engi neer s ( NACE) as a NACE Accr edi t ed Cor r osi on Speci al i st or a NACE cer t i f i ed Cat hodi c Pr ot ect i on ( CP) Speci al i st or be a r egi st er ed pr of essi onal engi neer who has cer t i f i cat i on or l i censi ng t hat i ncl udes educat i on and exper i ence i n cor r osi on cont r ol of bur i ed or submer ged met al l i c pi pi ng and t ank syst ems, i f such cer t i f i cat i on or l i censi ng i ncl udes 5 year s exper i ence i n cor r osi on cont r ol on under gr ound met al l i c sur f aces of t he t ype under t hi s cont r act .

b. The " cor r osi on exper t " shal l make at l east 3 v i s i t s t o t he pr oj ect s i t e. The f i r st of t hese vi s i t s shal l i ncl ude obt ai ni ng soi l r esi st i v i t y dat a, acknowl edgi ng t he t ype of pi pel i ne coat i ngs t o be used and r epor t i ng t o t he Cont r act or t he t ype of cat hodi c pr ot ect i on r equi r ed. Once t he submi t t al s ar e appr oved and t he mat er i al s del i ver ed, t he " cor r osi on exper t " shal l r evi s i t t he s i t e t he ensur e t he Cont r act or under st ands i nst al l at i on pr act i ces and l ayi ng out t he component s. The t hi r d v i s i t shal l i nvol ve t est i ng t he i nst al l ed cat hodi c pr ot ect i on syst ems and t r ai ni ng appl i cabl e per sonnel on pr oper mai nt enance t echni ques. The " cor r osi on exper t " shal l super vi se i nst al l at i on and t est i ng of al l cat hodi c pr ot ect i on.

c. Submi t evi dence of qual i f i cat i ons of t he " cor r osi on exper t " i ncl udi ng i t s name and qual i f i cat i ons cer t i f i ed i n wr i t i ng t o t he Cont r act i ng Of f i cer pr i or t o t he st ar t of const r uct i on. Cer t i f i cat i on shal l be submi t t ed gi v i ng t he name of t he f i r m, t he number of year s of exper i ence, and a l i s t of not l ess t han f i ve ( 5) of t he f i r m' s i nst al l at i ons, t hr ee ( 3) or mor e year s ol d, t hat have been t est ed and f ound sat i sf act or y.

1. 3. 2 Isolators

I sol at or s ar e r equi r ed t o i nsul at e t he i ndi cat ed pi pes f r om any ot her st r uct ur e. I sol at or s shal l be pr ovi ded wi t h l i ght ni ng pr ot ect i on and a t est st at i on as shown.

1. 3. 3 Anode and Bond Wi r es

A mi ni mum of speci f i ed magnesi um anodes wi t h an unpackaged wei ght of speci f i ed pounds shal l be pr ovi ded uni f or m di st ances al ong t he met al l i c pi pe l i nes. A mi ni mum of speci f i ed t est st at i ons shal l be used f or t hese anodes. These anodes shal l be i n addi t i on t o anodes f or t he pi pe under concr et e s l ab and casi ng r equi r ement s. For each cat hodi c syst em, t he met al l i c component s and st r uct ur es t o be pr ot ect ed shal l be made el ect r i cal l y cont i nuous. Thi s shal l be accompl i shed by i nst al l i ng bond wi r es bet ween t he var i ous st r uct ur es. Bondi ng of exi st i ng bur i ed st r uct ur es may al so be r equi r ed t o pr ecl ude det r i ment al st r ay cur r ent

Apr i l 2019 Page 3 SECTI ON 26 42 14. 00 10 ef f ect s and saf et y hazar ds. Pr ovi s i ons shal l be i ncl uded t o r et ur n st r ay cur r ent t o i t s sour ce wi t hout damagi ng st r uct ur es i nt er cept i ng t he st r ay cur r ent . The el ect r i cal i sol at i on of under gr ound f aci l i t i es i n accor dance wi t h accept abl e i ndust r y pr act i ce shal l be i ncl uded under t hi s sect i on.

Al l t est s shal l be wi t nessed by t he Cont r act i ng Of f i cer .

1. 3. 4 Sur ge Pr ot ect i on

Appr oved zi nc gr oundi ng cel l s or seal ed weat her pr oof l i ght ni ng ar r est or devi ces shal l be i nst al l ed acr oss i nsul at ed f l anges or f i t t i ngs i nst al l ed i n under gr ound pi pi ng as i ndi cat ed on t he dr awi ngs. The ar r est or shal l be gapl ess, sel f - heal i ng, sol i d st at e t ype. Zi nc anode composi t i on shal l conf or m t o ASTM B418, Type I I . Lead wi r es shal l be number 6 AWG copper wi t h hi gh mol ecul ar wei ght pol yet hyl ene ( HMWPE) i nsul at i on. The zi nc gr oundi ng cel l s shal l not be pr epackaged i n backf i l l but shal l be i nst al l ed as det ai l ed on t he dr awi ngs. Li ght ni ng ar r est or s or z i nc gr oundi ng cel l s ar e not r equi r ed f or i nsul at ed f l anges on met al l i c component s used on nonmet al l i c pi pi ng syst ems.

1. 3. 5 Nonmet al l i c Pi pe Syst em

I n t he event pi pe ot her t han met al l i c pi pe i s appr oved and used i n l i eu of met al l i c pi pe, al l met al l i c component s of t hi s pi pe syst em shal l be pr ot ect ed wi t h cat hodi c pr ot ect i on. Det ai l ed dr awi ngs of cat hodi c pr ot ect i on f or each component shal l be submi t t ed t o t he Cont r act i ng Of f i cer f or appr oval wi t hi n 45 days af t er dat e of r ecei pt of not i ce t o pr oceed, and bef or e commencement of any wor k.

1. 3. 5. 1 Coatings

Coat i ngs f or met al l i c component s shal l be as r equi r ed f or met al l i c f i t t i ngs. Pr ot ect i ve cover i ng ( coat i ng and t api ng) shal l be compl et ed and t est ed on each met al l i c component ( such as val ves, hydr ant s and f i l l i ngs) . Thi s cover i ng shal l be as r equi r ed f or under gr ound met al l i c pi pe. Each t est shal l be wi t nessed by t he Cont r act i ng Of f i cer . Coat i ngs shal l be sel ect ed, appl i ed, and i nspect ed as speci f i ed i n t hese speci f i cat i ons. The use of nonmet al l i c pi pe does not change ot her r equi r ement s of t he speci f i cat i ons. Any devi at i ons due t o t he use of nonmet al l i c pi pe shal l be submi t t ed f or appr oval .

1. 3. 5. 2 Tr acer Wi r e

When a nonmet al l i c pi pe l i ne i s used t o ext end or add t o an exi st i ng met al l i c l i ne, an i nsul at ed No. 8 AWG copper wi r e shal l be t her mi t - wel ded t o t he exi st i ng met al l i c l i ne and r un t he l engt h of t he new nonmet al l i c l i ne. Thi s wi r e shal l be used as a l ocat or t r acer wi r e and t o mai nt ai n cont i nui t y t o any f ut ur e ext ensi ons of t he pi pe l i ne.

1. 3. 6 Drawings

Submi t det ai l ed dr awi ngs consi st i ng of a compl et e l i s t of equi pment and mat er i al i ncl udi ng manuf act ur er ' s descr i pt i ve and t echni cal l i t er at ur e, cat al og cut s, r esul t s of syst em desi gn cal cul at i ons i ncl udi ng soi l - r esi st i v i t y, i nst al l at i on i nst r uct i ons and cer t i f i ed t est dat a showi ng l ocat i on of anodes and st at i ng t he maxi mum r ecommended anode cur r ent out put densi t y. I ncl ude i n t he det ai l dr awi ngs compl et e wi r i ng and schemat i c di agr ams, i nsul at ed f i t t i ngs, t est st at i ons, per manent r ef er ence cel l s, and bondi ng. and any ot her det ai l s r equi r ed t o demonst r at e t hat t he syst em has been coor di nat ed and wi l l f unct i on pr oper l y as a

Apr i l 2019 Page 4 SECTI ON 26 42 14. 00 10 uni t . Locat i ons shal l be r ef er enced t o t wo ( 2) per manent f aci l i t i es or mar k poi nt s.

1. 4 DELI VERY, STORAGE, AND HANDLI NG

St or age ar ea f or magnesi um anodes wi l l be desi gnat ed by t he Cont r act i ng Of f i cer . I f anodes ar e not st or ed i n a bui l di ng, t ar ps or s i mi l ar pr ot ect i on shoul d be used t o pr ot ect anodes f r om i ncl ement weat her .

Packaged anodes, damaged as a r esul t of i mpr oper handl i ng or bei ng exposed t o r ai n, shal l be r esacked and t he r equi r ed backf i l l added.

1. 5 EXTRA MATERI ALS

Af t er appr oval of shop dr awi ngs, and not l at er t han t hr ee ( 3) mont hs pr i or t o t he dat e of benef i c i al occupancy, f ur ni sh spar e par t s dat a f or each di f f er ent i t em of mat er i al and equi pment speci f i ed, af t er appr oval of det ai l dr awi ngs and not l at er t han si x ( 6) mont hs pr i or t o t he dat e of benef i c i al occupancy. The dat a shal l i ncl ude a compl et e l i s t of par t s, speci al t ool s, and suppl i es, wi t h cur r ent uni t pr i ces and sour ce of suppl y. One ( 1) spar e anode of each t ype shal l be f ur ni shed. I n addi t i on, suppl y i nf or mat i on f or mat er i al and equi pment r epl acement f or al l ot her component s of t he compl et e syst em, i ncl udi ng anodes, cabl es, spl i ce k i t s and connect or s, cor r osi on t est st at i ons, and any ot her component s not l i s t ed above.

PART 2 PRODUCTS

2. 1 SYSTEM DESCRI PTI ON

Pr ovi de a compl et e, oper at i ng, sacr i f i c i al anode cat hodi c pr ot ect i on syst em i n compl et e compl i ance wi t h NFPA 70, wi t h al l appl i cabl e Feder al , St at e, and l ocal r egul at i ons and wi t h t he mi ni mum r equi r ement s of t hi s cont r act .

a. I n addi t i on t o t he mi ni mum r equi r ement s of t hese speci f i cat i ons, const r uct i on of gas pi pel i nes and associ at ed cat hodi c pr ot ect i on syst ems shal l be i n compl i ance wi t h 49 CFR 192 and const r uct i on of hazar dous l i qui d pi pel i nes, i ncl udi ng f uel pi pel i nes, and associ at ed cat hodi c pr ot ect i on syst ems shal l be i n compl i ance wi t h 49 CFR 195 and const r uct i on and i nst al l at i on of under gr ound f uel st or age t anks and associ at ed cat hodi c pr ot ect i on syst em shal l be i n compl i ance wi t h

40 CFR 280.

b. The ser vi ces r equi r ed i ncl ude pl anni ng, i nst al l at i on, adj ust i ng and t est i ng of a cat hodi c pr ot ect i on syst em, usi ng sacr i f i c i al anodes f or cat hodi c pr ot ect i on of t he Wat er , Fi r e Pr ot ect i on, For ce Mai n, Gas, l i nes, as speci f i ed, t hei r connect or s and l i nes under t he s l ab or f l oor f oundat i on. The cat hodi c pr ot ect i on syst em shal l i ncl ude anodes, cabl es, connect or s, cor r osi on pr ot ect i on t est st at i ons, and any ot her equi pment r equi r ed f or a compl et e oper at i ng syst em pr ovi di ng t he NACE cr i t er i a of pr ot ect i on as speci f i ed.

c. I nsul at or s ar e r equi r ed whenever needed t o i nsul at e t he pi pes f r om any ot her st r uct ur e. Any pi pe cr ossi ng t he speci f i ed pi pe shal l have a t est st at i on. The cat hodi c pr ot ect i on shal l be pr ovi ded on Wat er , Fi r e Pr ot ect i on, For ce Mai n, and Gas pi pes as speci f i ed.

d. Submi t pr oof t hat t he mat er i al s and equi pment f ur ni shed under t hi s sect i on conf or m t o t he speci f i ed r equi r ement s cont ai ned i n t he r ef er enced st andar ds or publ i cat i ons. The l abel or l i s t i ng by t he

Apr i l 2019 Page 5 SECTI ON 26 42 14. 00 10 speci f i ed agency wi l l be accept abl e evi dence of such compl i ance.

e. Bef or e f i nal accept ance of t he cat hodi c pr ot ect i on syst em, submi t 4 copi es of oper at i ng manual s out l i ni ng t he st ep- by- st ep pr ocedur es r equi r ed f or syst em st ar t up, oper at i on, adj ust ment of cur r ent f l ow, and shut down. The manual s shal l i ncl ude t he manuf act ur er ' s name, model number , ser vi ce manual , par t s l i s t , and br i ef descr i pt i on of al l equi pment and t hei r basi c oper at i ng f eat ur es.

f . Submi t 4 copi es of mai nt enance manual s, l i s t i ng r out i ne mai nt enance pr ocedur es, r ecommendat i on f or mai nt enance t est i ng, possi bl e br eakdowns and r epai r s, and t r oubl eshoot i ng gui des. The manual s shal l i ncl ude si ngl e- l i ne di agr ams f or t he syst em as i nst al l ed; i nst r uct i ons i n maki ng pi pe- t o- r ef er ence cel l and t ank- t o- r ef er ence cel l pot ent i al measur ement s and f r equency of moni t or i ng; i nst r uct i ons f or di el ect r i c connect i ons, i nt er f er ence and sacr i f i c i al anode bonds; i nst r uct i ons shal l i ncl ude pr ecaut i ons t o ensur e saf e condi t i ons dur i ng r epai r of pi pe or ot her met al l i c syst ems. The i nst r uct i ons shal l be neat l y bound bet ween per manent cover s and t i t l ed " Oper at i ng and Mai nt enance I nst r uct i ons. " These i nst r uct i ons shal l be submi t t ed f or t he Cont r act i ng Of f i cer ' s appr oval . The i nst r uct i ons shal l i ncl ude t he following:

( 1) As- bui l t dr awi ngs, t o scal e, of t he ent i r e syst em, showi ng t he l ocat i ons of t he pi pi ng, l ocat i on of al l anodes and t est st at i ons, l ocat i ons of al l i nsul at i ng j oi nt s, and st r uct ur e- t o- soi l pot ent i al t est poi nt s as measur ed dur i ng t he t est s r equi r ed by par agr aph TESTS AND MEASUREMENTS. Each t est poi nt shal l be gi ven a uni que al phanumer i c i dent i f i cat i on t hat i s cr oss r ef er enced t o t he dat a sheet s.

( 2) Recommendat i ons f or mai nt enance t est i ng, i ncl udi ng i nst r uct i ons i n maki ng pi pe- t o- r ef er ence cel l pot ent i al measur ement s and f r equency of t est i ng.

( 3) Al l mai nt enance and oper at i ng i nst r uct i ons and namepl at e dat a shal l be i n Engl i sh.

( 4) I nst r uct i ons shal l i ncl ude pr ecaut i ons t o i nsur e saf e condi t i ons dur i ng r epai r of pi pe syst em.

2. 1. 1 Cont r act or ' s Modi f i cat i ons

The speci f i ed syst em i s based on a compl et e syst em wi t h magnesi um sacr i f i c i al anodes. The Cont r act or may modi f y t he cat hodi c pr ot ect i on syst em af t er r evi ew of t he pr oj ect , s i t e ver i f i cat i on, and anal ysi s, i f t he pr oposed modi f i cat i ons i ncl ude t he anodes speci f i ed and wi l l pr ovi de bet t er over al l syst em per f or mance.

a. Submi t 4 copi es of det ai l dr awi ngs showi ng pr oposed changes i n l ocat i on, scope of per f or mance i ndi cat i ng any var i at i ons f r om, addi t i ons t o, or c l ar i f i cat i ons of cont r act dr awi ngs. Show pr oposed changes i n anode ar r angement , anode si ze and number , anode mat er i al s and l ayout det ai l s, condui t s i ze, wi r e s i ze, mount i ng det ai l s, wi r i ng di agr am, met hod f or el ect r i cal l y- i sol at i ng each pi pe, and any ot her per t i nent i nf or mat i on t o pr oper i nst al l at i on and per f or mance of t he syst em. The modi f i cat i ons shal l be f ul l y descr i bed, shal l be appr oved by t he Cont r act i ng Of f i cer , and shal l meet t he f ol l owi ng cr i t er i a.

Apr i l 2019 Page 6 SECTI ON 26 42 14. 00 10

b. The pr oposed syst em shal l achi eve a mi ni mum pi pe- t o- soi l " i nst ant of f " pot ent i al of mi nus 850 mi l l i vol t s wi t h r ef er ence t o a sat ur at ed copper - copper sul f at e r ef er ence cel l on t he under gr ound component s of t he pi pi ng or ot her met al l i c sur f ace. Take r esi st i v i t y measur ement s of t he soi l i n t he v i c i ni t y of t he pi pes and gr ound bed si t es. Based upon t he measur ement s t aken, t he cur r ent and vol t age shal l be r equi r ed t o pr oduce a mi ni mum of mi nus 850 mi l l i vol t s " i nst ant of f " pot ent i al bet ween t he st r uct ur e bei ng t est ed and t he r ef er ence cel l . Thi s pot ent i al shal l be obt ai ned over 95 per cent of t he met al l i c ar ea. The anode syst em shal l be desi gned f or a l i f e of t went y- f i ve ( 25) year s of cont i nuous oper at i on.

c. Submi t f i nal r epor t r egar di ng Cont r act or ' s modi f i cat i ons. The r epor t shal l i ncl ude pi pe- t o- soi l measur ement s t hr oughout t he af f ect ed ar ea, i ndi cat i ng t hat t he modi f i cat i ons i mpr oved t he over al l condi t i ons, and cur r ent measur ement s f or anodes. The f ol l owi ng speci al mat er i al s and i nf or mat i on ar e r equi r ed: t api ng mat er i al s and conduct or s; z i nc gr oundi ng cel l , i nst al l at i on and t est i ng pr ocedur es, and equi pment ;

coat i ng mat er i al ; syst em desi gn cal cul at i ons f or anode number , l i f e, and par amet er s t o achi eve pr ot ect i ve pot ent i al ; backf i l l shi el d mat er i al and i nst al l at i on det ai l s showi ng wat er pr oof i ng; bondi ng and wat er pr oof i ng det ai l s; i nsul at ed r esi st ance wi r e; exot her mi c wel d equi pment and mat er i al .

2. 1. 2 Summar y of Ser vi ces Requi r ed

The scope of ser vi ces shal l i ncl ude, but shal l not be l i mi t ed t o, t he following:

a. Cl ose- i nt er val pot ent i al sur veys.

b. Cat hodi c Pr ot ect i on Syst ems.

c. Syst em t est i ng.

d. Casi ng cor r osi on cont r ol .

e. I nt er f er ence t est i ng.

f . Tr ai ni ng.

g. Oper at i ng and mai nt enance manual .

h. I nsul at or t est i ng and bondi ng t est i ng.

i . Coat i ng and hol i day t est i ng t o be submi t t ed wi t hi n 45 days of not i ce t o pr oceed.

2. 1. 3 Test s of Component s

Per f or m a mi ni mum of f our ( 4) t est s at each met al l i c component i n t he pi pi ng syst em. Two ( 2) measur ement s shal l be made di r ect l y over t he anodes and t he ot her t wo ( 2) t est s shal l be over t he out er edge of t he component , but at t he f ar t hest poi nt f r om t he anodes. St r uct ur e and pi pes shal l be shown wi t h t he cat hodi c pr ot ect i on equi pment . Al l component s of t he cat hodi c pr ot ect i on syst em shal l be shown on dr awi ngs, showi ng t hei r r el at i onshi p t o t he pr ot ect ed st r uct ur e or component . A nar r at i ve shal l descr i be how t he cat hodi c pr ot ect i on syst em wi l l wor k and pr ovi de t est i ng at each component . Component s r equi r i ng cat hodi c pr ot ect i on shal l i ncl ude

Apr i l 2019 Page 7 SECTI ON 26 42 14. 00 10 but not be l i mi t ed t o t he f ol l owi ng:

a. Pi pes under t he f l oor s l ab or f oundat i ons.

b. PI V.

c. Shut of f val ves.

d. Met al l i c pi pe ext ended f r om abovegr ound l ocat i ons.

e. Each connect or or change- of - di r ect i on devi ce.

f . Any met al l i c pi pe component or sect i on.

g. Backf l ow pr event er .

h. Cul ver t .

2. 1. 4 El ect r i cal Pot ent i al Measur ement s

Al l pot ent i al t est s shal l be made at a mi ni mum of 10 f oot i nt er val s wi t nessed by t he Cont r act i ng Of f i cer . Submi t t al s shal l i dent i f y t est l ocat i ons on separ at e dr awi ng, showi ng al l met al t o be pr ot ect ed and al l cat hodi c pr ot ect i on equi pment . Test poi nt s equi pment and pr ot ect ed met al shal l be easi l y di st i ngui shed and i dent i f i ed.

2. 1. 5 Achi evement of Cr i t er i a f or Pr ot ect i on

Al l conduct or s, unl ess ot her wi se shown, shal l be r out ed t o or t hr ough t he t est st at i ons. Each syst em pr ovi ded shal l achi eve a mi ni mum pi pe- t o- soi l " i nst ant of f " pot ent i al of mi nus 850 mi l l i vol t pot ent i al s wi t h r ef er ence t o a sat ur at ed copper - copper - sul f at e r ef er ence cel l on al l under gr ound component s of t he pi pi ng. Based upon t he measur ement s t aken, t he cur r ent and vol t age of t he anodes shoul d be adj ust ed as r equi r ed t o pr oduce a mi ni mum of mi nus 850 mi l l i vol t s " i nst ant of f " pot ent i al bet ween t he st r uct ur e bei ng t est ed and t he r ef er ence cel l . Thi s pot ent i al shoul d be obt ai ned over 95 per cent of t he met al l i c ar ea. Thi s must be achi eved wi t hout t he " i nst ant of f " pot ent i al exceedi ng 1150 mi l l i vol t s. Test i ng wi l l be wi t nessed by t he Cont r act i ng Of f i cer . Pr ovi de addi t i onal anodes i f r equi r ed t o achi eve t he mi nus 850 mi l l i vol t s " i nst ant of f " . Al t hough accept ance cr i t er i a of t he cat hodi c pr ot ect i on syst ems ar e def i ned i n NACE SP0169, f or t hi s pr oj ect t he " i nst ant of f " pot ent i al of mi nus 850 mi l l i vol t s i s t he onl y accept abl e cr i t er i a.

2. 1. 6 Met al l i c Component s on Nonmet al l i c Syst ems and Typi cal s

2. 1. 6. 1 Met al l i c Component s

As a mi ni mum, pr ot ect each met al l i c component wi t h t wo ( 2) magnesi um anodes. Thi s number of anodes i s r equi r ed t o achi eve mi nus 850 mi l l i vol t s " i nst ant of f " pot ent i al on t he met al l i c ar ea and at t he same t i me not pr ovi de over vol t age above 1150 mi l l i vol t s " i nst ant of f . " As a mi ni mum, t he magnesi um anode unpackaged wei ght shal l be 17 pounds. The magnesi um anodes shal l be l ocat ed on each si de of t he met al l i c component and r out ed t hr ough a t est st at i on.

2. 1. 6. 2 Fi r e Hydr ant s

Fi r e hydr ant pi pe component s shal l have a mi ni mum of t wo ( 2) anodes.

Apr i l 2019 Page 8 SECTI ON 26 42 14. 00 10

These magnesi um anodes shal l have an unpackaged wei ght of 17 pounds.

2. 1. 6. 3 Pi pe Under Concr et e Sl ab

Pi pe under concr et e s l ab shal l have a mi ni mum of 2 magnesi um anodes.

These magnesi um anodes shal l have an unpackaged wei ght of 17 pounds. Pi pe under concr et e s l ab shal l have 1 2 per manent r ef er ence el ect r odes l ocat ed under t he s l ab. One ( 1) per manent r ef er ence el ect r ode shal l be l ocat ed wher e t he pi pe ent er s t he concr et e s l ab. Al l conduct or s shal l be r out ed t o a t est st at i on.

2. 1. 6. 4 Valves

Each val ve shal l be pr ot ect ed wi t h 1 magnesi um anode. The magnesi um anode shal l have an unpackaged wei ght of 17 pounds.

2. 1. 6. 5 Met al l i c Pi pe Component or Sect i on

Each sect i on of met al l i c pi pe shal l be pr ot ect ed wi t h 2 magnesi um anodes.

The magnesi um anodes shal l have an unpackaged wei ght of 17 pounds.

2. 1. 6. 6 Connect or s or Change- of - Di r ect i on Devi ces

Each change- of - di r ect i on devi ce shal l be pr ot ect ed wi t h 2 magnesi um anodes. The magnesi um anode shal l have an unpackaged wei ght of 917 pounds.

2. 1. 7 Met al l i c Component Coat i ng

Coat i ngs f or met al l i c component s shal l be as r equi r ed f or met al l i c f i t t i ngs as i ndi cat ed. Thi s wi l l i ncl ude f i r e hydr ant s, T' s, el bows, val ves, et c. Coat i ngs shal l be sel ect ed, appl i ed, and i nspect ed as speci f i ed i n t hese speci f i cat i ons. Al l abovegr ound pi pel i ne shal l be coat ed as i ndi cat ed or as appr oved. The coat i ng shal l have a mi ni mum t hi ckness of 7 mi l . The pi pel i ne coat i ng shal l be i n accor dance wi t h al l appl i cabl e Feder al , St at e, and l ocal r egul at i ons.

2. 2 MAGNESI UM ANODES

I nst al l a mi ni mum of speci f i ed anodes on t he Pi pe or Tank syst em. See Par agr aph METALLI C COMPONENTS ON NONMETALLI C SYSTEMS AND TYPI CALS f or addi t i onal anodes under s l ab.

2. 2. 1 Anode Composi t i on

Anodes shal l be of hi gh- pot ent i al magnesi um al l oy, made of pr i mar y magnesi um obt ai ned f r om sea wat er or br i ne, and not made f r om scr ap met al . Magnesi um anodes shal l conf or m t o ASTM B843 and t o t he f ol l owi ng anal ysi s ( i n per cent s) ot her wi se i ndi cat ed:

Al umi num, max. 0.010

Manganese, max. 0. 50 t o 1. 30

Zinc 0.05

Si l i con, max. 0.05

Apr i l 2019 Page 9 SECTI ON 26 42 14. 00 10

Copper , max. 0.02

Ni ckel , max. 0.001

I r on, Max. 0. 03

Ot her i mpur i t i es, max. 0. 05 each or 0. 3 max. t ot al

Magnesium Remainder

Fur ni sh spect r ogr aphi c anal ysi s on sampl es f r om each heat or bat ch of anodes used on t hi s pr oj ect .

2. 2. 2 Di mensi ons and Wei ght s

Di mensi ons and wei ght s of anodes shal l be appr oxi mat el y as f ol l ows:

TYPI CAL MAGNESI UM ANODE SI ZE

( Cr oss sect i ons may be r ound, squar e, or D shaped)

Nominal Wei ght ( l bs)

Appr ox. Si ze ( i nch) Nomi nal Gr oss Wei ght ( l bs) Packaged i n

Backfill

Nomi nal Package Di mensi ons ( i nch)

3 3 X 3 X 5 8 5- 1/ 4 X 5- 1/ 4 X 8

5 3 X 3 X 8 13 5- 1/ 4 X 5- 1/ 4 X 11- 1/ 4

9 3 X 3 X 14 27 5- 1/ 4 X 20

12 4 X 4 X 12 32 7- 1/ 2 X 18

17 4 X 4 X 17 45 7- 1/ 2 X 24

32 5 X 5 X 20- 1/ 2 68 8- 1/ 2 X 28

50 7 X 7 X 16 100 10 X 24

2. 2. 3 Packaged Anodes

Pr ovi de anodes i n packaged f or m wi t h t he anode sur r ounded by speci al l y- pr epar ed qui ck- wet t i ng backf i l l and cont ai ned i n a wat er per meabl e c l ot h or paper sack. Anodes shal l be cent er ed by means of spacer s i n t he backf i l l mat er i al . The backf i l l mat er i al shal l have t he f ol l owi ng composi t i on, unl ess ot her wi se i ndi cat ed:

Material Appr oxi mat e Per cent by Wei ght

Gypsum 75

Bentonite 20

Apr i l 2019 Page 10 SECTI ON 26 42 14. 00 10

Material Appr oxi mat e Per cent by Wei ght

Sodi um Sul phat e 5

Total 100

2. 2. 4 Zi nc Anodes

Zi nc anodes shal l conf or m t o ASTM B418, Type I I .

2. 2. 5 Connect i ng Wi r e

2. 2. 5. 1 Wi r e Requi r ement s

Wi r e shal l be t he speci f i ed AWG sol i d copper wi r e, not l ess t han 10 f eet l ong, unspl i ced, compl yi ng wi t h NFPA 70, Type TW or RHW- USE i nsul at i on, as speci f i ed. Connect i ng wi r es f or magnesi um anodes shal l be f act or y i nst al l ed wi t h t he pl ace or emer gence f r om t he anode i n a cavi t y seal ed f l ush wi t h a di el ect r i c seal i ng compound. Connect i ng wi r es f or z i nc anodes shal l be f act or y i nst al l ed wi t h t he pl ace of connect i on t o t he pr ot r udi ng st eel cor e compl et el y seal ed wi t h a di el ect r i c mat er i al .

2. 2. 5. 2 Anode Header Cabl e

Cabl e f or anode header and di st r i but i on shal l be t he speci f i ed AWG st r anded copper wi r e wi t h t ype CP hi gh mol ecul ar wei ght pol yet hyl ene, 7/ 64 i nch t hi ck i nsul at i on, 600- vol t r at i ng.

2. 3 MI SCELLANEOUS MATERI ALS

2. 3. 1 El ect r i cal Wi r e

Wi r e shal l be No. 10 AWG st r anded copper wi r e wi t h NFPA 70, Type TW, RHW- USE wi t h out er cover i ng RHW- USE Pol yet hyl ene i nsul at i on. Pol yet hyl ene i nsul at i on shal l compl y wi t h t he r equi r ement s of ASTM D1248 and shal l be of t he f ol l owi ng t ypes, c l asses, and gr ades:

Hi gh- mol ecul ar wei ght pol yet hyl ene shal l be Type I , Cl ass C, Gr ade E5.

Hi gh- densi t y pol yet hyl ene shal l be Type I I I , Cl ass C, Gr ade E3.

2. 3. 1. 1 Wi r e Spl i c i ng

Connect i ng wi r e spl i c i ng shal l be made wi t h copper compr essi on connect or s or exot her mi c wel ds, f ol l owi ng i nst r uct i ons of t he manuf act ur er . Si ngl e spl i t - bol t connect i ons shal l not be used. Sheat hs f or encapsul at i ng el ect r i cal wi r e spl i ces t o be bur i ed under gr ound shal l f i t t he i nsul at ed wi r es ent er i ng t he spl i ced j oi nt s and epoxy pot t i ng compound shal l be as speci f i ed bel ow.

2. 3. 1. 2 Test Wi r es

Test wi r es shal l be AWG No. 12 st r anded copper wi r e wi t h NFPA 70, Type TW or RHW- USE wi t h out er cover i ng or pol yet hyl ene i nsul at i on.

Apr i l 2019 Page 11 SECTI ON 26 42 14. 00 10

2. 3. 1. 3 Resi st ance Wi r e

Resi st ance wi r e shal l be AWG No. 16 or No. 22 ni ckel - chr omi um wi r e.

2. 3. 2 Conduit

Ri gi d gal vani zed st eel condui t and accessor i es shal l conf or m t o UL 6. Non met al l i c condui t shal l conf or m t o NEMA TC 2.

2. 3. 3 Test Boxes and Junct i ons Boxes

Boxes shal l be out door t ype conf or mi ng t o UL 514A.

2. 3. 4 Joi nt , Pat ch, Seal , and Repai r Coat i ng

Seal i ng and di el ect r i c compound shal l be a bl ack, r ubber based compound t hat i s sof t , per manent l y pl i abl e, t acky, mol dabl e, and unbacked.

Compound shal l be appl i ed as r ecommended by t he manuf act ur er , but not l ess t han 1/ 2- i nch t hi ck. Coat i ng compound shal l be col d- appl i ed coal - t ar base mast i c or hot - appl i ed coal - t ar enamel , as speci f i ed.

Pr essur e- sensi t i ve v i nyl pl ast i c el ect r i cal t ape shal l conf or m t o UL 510.

2. 3. 5 Backf i l l Shi el ds

Shi el ds shal l consi st of appr oved pi pel i ne wr appi ng or f i ber gl ass- r ei nf or ced, coal - t ar i mpr egnat ed t ape, or pl ast i c wel d caps, speci f i cal l y made f or t he pur pose and i nst al l ed i n accor dance wi t h t he manuf act ur er ' s r ecommendat i ons. When j oi nt bonds ar e r equi r ed, due t o t he use of mechani cal j oi nt s, t he ent i r e j oi nt shal l be pr ot ect ed by t he use of a kr af t paper j oi nt cover . The j oi nt cover shal l be f i l l ed wi t h pour ed- i n, hot coat - t ar enamel .

2. 3. 6 Epoxy Pot t i ng Compound

Compound f or encapsul at i ng el ect r i cal wi r e spl i ces t o be bur i ed under gr ound shal l be a t wo package syst em made f or t he pur pose.

2. 3. 7 Test St at i ons

St at i ons shal l be of t he f l ush- cur b- box t ype and shal l be t he st andar d pr oduct of a r ecogni zed manuf act ur er . Test st at i ons shal l be compl et e wi t h an i nsul at ed t er mi nal bl ock havi ng t he r equi r ed number of t er mi nal s.

The t est st at i on shal l be pr ovi ded wi t h a l ockabl e over and shal l have an embossed l egend, " C. P. Test . " A mi ni mum of one ( 1) t est st at i on shal l be pr ovi ded each component of t he pi pe or t ankas speci f i ed. A mi ni mum of s i x ( 6) t er mi nal s shal l be pr ovi ded i n each t est st at i on. A mi ni mum of t wo ( 2) l eads ar e r equi r ed t o t he met al l i c pi pe f r om each t est st at i on. Ot her conduct or s shal l be pr ovi ded f or each anode, ot her f or ei gn pi pe, and r ef er ence cel l s as r equi r ed. Uni t s shal l be i nsl l ed f l ush wi t h gr ade and gr out ed i n pl ace.

2. 3. 8 Joi nt and Cont i nui t y Bonds

Bonds shal l be pr ovi ded acr oss al l j oi nt s i n t he met al l i c wat er , or gas l i nes as speci f i ed, acr oss any el ect r i cal l y di scont i nuous connect i ons and al l ot her pi pes and st r uct ur es wi t h ot her t han wel ded or t hr eaded j oi nt s t hat ar e i ncl uded i n t hi s cat hodi c pr ot ect i on syst em. Unl ess ot her wi se speci f i ed i n t he speci f i cat i ons, bonds bet ween st r uct ur es and acr oss j oi nt s i n pi pe wi t h ot her t han wel ded or t hr eaded j oi nt s shal l be No. 8

Apr i l 2019 Page 12 SECTI ON 26 42 14. 00 10

AWG st r anded copper cabl e wi t h pol yet hyl ene i nsul at i on. Bonds bet ween st r uct ur es shal l cont ai n suf f i c i ent s l ack f or any ant i c i pat ed movement bet ween st r uct ur es. Bonds acr oss pi pe j oi nt s shal l cont ai n a mi ni mum of 4 i nch of s l ack t o al l ow f or pi pe movement and soi l st r ess. Bonds shal l be at t ached by exot her mi c wel di ng. Exot her mi c wel d ar eas shal l be i nsul at ed wi t h coat i ng compound and appr oved, and wi t nessed by t he Cont r act i ng Of f i cer . Cont i nui t y bonds shal l be i nst al l ed as necessar y t o r educe st r ay cur r ent i nt er f er ence. Addi t i onal j oi nt bondi ngs shal l be accompl i shed wher e t he necessi t y i s di scover ed dur i ng const r uct i on or t est i ng or wher e t he Cont r act i ng Of f i cer ' s r epr esent at i ve di r ect s t hat such bondi ng be done. Joi nt bondi ng shal l i ncl ude al l associ at ed excavat i on and backf i l l i ng. Ther e shal l be a mi ni mum of t wo ( 2) cont i nui t y bonds bet ween each st r uct ur e and ot her t han wel ded or t hr eaded j oi nt s. Test f or el ect r i cal cont i nui t y acr oss al l j oi nt s wi t h ot her t han wel ded or t hr eaded j oi nt s and acr oss al l met al l i c por t i ons or component s. Pr ovi de bondi ng as r equi r ed and as speci f i ed above unt i l el ect r i cal cont i nui t y i s achi eved.

Submi t bondi ng t est dat a f or appr oval .

2. 3. 9 Resi st ance Bonds

Resi st ance bonds shoul d be adj ust ed as out l i ned i n t hi s speci f i cat i on.

Al t er nat e met hods may be used i f t hey ar e appr oved by t he Cont r act i ng Officer.

2. 3. 10 St r ay Cur r ent Measur ement s

St r ay cur r ent measur ement s shoul d be per f or med at each t est st at i on.

St r ay cur r ent s r esul t i ng f r om l i ght ni ng or over head al t er nat i ng cur r ent ( AC) power t r ansmi ssi on syst ems shal l be mi t i gat ed i n accor dance wi t h

NACE SP0177.

2. 3. 11 El ect r i cal I sol at i on of St r uct ur es

As a mi ni mum, i sol at i ng f l anges or uni ons shal l be pr ovi ded as speci f i ed:

a. Connect i on of new met al l i c pi pi ng or component s t o exi st i ng pi pi ng.

b. Pr essur e pi pi ng under f l oor s l ab t o a bui l di ng.

I sol at i on shal l be pr ovi ded at met al l i c connect i on of al l l i nes t o exi st i ng syst em and wher e connect i ng t o a bui l di ng. Addi t i onal l y, i sol at i on shal l be pr ovi ded bet ween wat er , and/ or gas and f or ced mai n l i ne, as speci f i ed, and f or ei gn pi pes t hat cr oss t he new l i nes wi t hi n 10 f eet .

I sol at i on f i t t i ngs, i ncl udi ng i sol at i ng f l anges and coupl i ngs, shal l be i nst al l ed abovegr ound or i n a concr et e pi t .

2. 3. 11. 1 El ect r i cal l y I sol at i ng Pi pe Joi nt s

El ect r i cal l y i sol at i ng pi pe j oi nt s shal l be of a t ype t hat i s i n r egul ar f act or y pr oduct i on.

2. 3. 11. 2 El ect r i cal l y Conduct i ve Coupl i ngs

El ect r i cal l y conduct i ve coupl i ngs shal l be of a t ype t hat has a publ i shed maxi mum el ect r i cal r esi st ance r at i ng gi ven i n t he manuf act ur er ' s l i t er at ur e. Cr adl es and seal s shal l be of a t ype t hat i s i n r egul ar f act or y pr oduct i on made f or t he pur pose of el ect r i cal l y i nsul at i ng t he car r i er pi pe f r om t he casi ng and pr event i ng t he i ncur si on of wat er i nt o t he annul ar space.

Apr i l 2019 Page 13 SECTI ON 26 42 14. 00 10

2. 3. 11. 3 I nsul at i ng Joi nt Test i ng

A Model 601 I nsul at i on Checker , as manuf act ur ed by " Gas El ect r oni cs" , , or an appr oved equal , shal l be used f or i nsul at i ng j oi nt ( f l ange) el ect r i cal testing.

2. 3. 12 Under gr ound St r uct ur e Coat i ng

Thi s coat i ng speci f i cat i on shal l t ake pr ecedence over any ot her pr oj ect speci f i cat i on and dr awi ng not es, whet her st at ed or i mpl i ed, and shal l al so appl y t o t he pi pel i ne or t ank suppl i er . No var i ance i n coat i ng qual i t y shal l be al l owed by t he Cont r act or or Base Const r uct i on Repr esent at i ve wi t hout t he wr i t t en consent of t he desi gner . Al l under gr ound met al l i c pi pel i nes and t anks t o be cat hodi cal l y pr ot ect ed shal l be af f or ded a good qual i t y f act or y- appl i ed coat i ng. Thi s i ncl udes al l car bon st eel , cast - i r on and duct i l e- i r on pi pel i nes or vessel s. Coat i ngs shal l be sel ect ed, appl i ed, and i nspect ed as speci f i ed. I f non- met al l i c pi pel i nes ar e i nst al l ed, al l met al l i c f i t t i ngs on pi pe sect i ons shal l be coat ed i n accor dance wi t h t hi s speci f i cat i on sect i on.

a. The nomi nal t hi ckness of t he met al l i c pi pe j oi nt or ot her component coat i ng shal l be as speci f i ed, pl us or mi nus 5 per cent .

b. Pi pe and j oi nt coat i ng f or f act or y appl i ed or f i el d r epai r mat er i al shal l be appl i ed as r ecommended by t he manuf act ur er and shal l be one of t he f ol l owi ng:

( 1) Cont i nuousl y ext r uded pol yet hyl ene and adhesi ve coat i ng syst em.

( 2) Pol yvi nyl chl or i de pr essur e- sensi t i ve adhesi ve t ape.

( 3) Hi gh densi t y pol yet hyl ene/ bi t umi nous r ubber compound t ape.

( 4) But yl r ubber t ape.

( 5) Coal t ar epoxy.

2. 3. 12. 1 Fi el d Joi nt s

Al l f i el d j oi nt s shal l be coat ed wi t h mat er i al s compat i bl e wi t h t he pi pel i ne coat i ng compound. The j oi nt coat i ng mat er i al shal l be appl i ed t o an equal t hi ckness as t he pi pel i ne coat i ng. Unbonded coat i ngs shal l not be used on t hese bur i ed met al l i c component s. Thi s i ncl udes t he el i mi nat i on of al l unbonded pol ymer wr aps or t ubes. Once t he pi pel i ne or vessel i s set i n t he t r ench, an i nspect i on of t he coat i ng shal l be conduct ed. Thi s i nspect i on shal l i ncl ude el ect r i cal hol i day det ect i on.

Any damaged ar eas of t he coat i ng shal l be pr oper l y r epai r ed. The Cont r act i ng Of f i cer shal l be asked t o wi t ness i nspect i on of t he coat i ng and t est i ng usi ng a hol i day det ect or .

2. 3. 12. 2 I nspect i on of Pi pe Coat i ngs

Any damage t o t he pr ot ect i ve cover i ng dur i ng t r ansi t and handl i ng shal l be r epai r ed bef or e i nst al l at i on. Af t er f i el d coat i ng and wr appi ng has been appl i ed, t he ent i r e pi pe shal l be i nspect ed by an el ect r i c hol i day det ect or wi t h i mpr essed cur r ent i n accor dance wi t h NACE SP0188 usi ng a f ul l - r i ng, spr i ng- t ype coi l el ect r ode. The hol i day det ect or shal l be equi pped wi t h a bel l , buzzer , or ot her t ype of audi bl e s i gnal whi ch sounds when a hol i day i s det ect ed. Al l hol i days i n t he pr ot ect i ve cover i ng shal l be r epai r ed i mmedi at el y upon det ect i on. Occasi onal checks of hol i day det ect or pot ent i al wi l l be made by t he Cont r act i ng Of f i cer ' s r epr esent at i ve t o det er mi ne sui t abi l i t y of t he det ect or . Al l l abor , Apr i l 2019 Page 14 SECTI ON 26 42 14. 00 10 mat er i al s, and equi pment necessar y f or conduct i ng t he i nspect i on shal l be f ur ni shed by t he Cont r act or .

2. 3. 12. 2. 1 Pr ot ect i ve Cover i ng f or Abovegr ound Pi pi ng Syst em

Fi ni sh pai nt i ng shal l conf or m t o t he appl i cabl e par agr aph of SECTI ON:

09 90 00 PAI NTS AND COATI NGS and as f ol l ows:

2. 3. 12. 2. 2 Fer r ous Sur f aces

Shop- pr i med sur f aces shal l be t ouched- up wi t h f er r ous met al pr i mer .

Sur f aces t hat have not been shop- pr i med shal l be sol vent - c l eaned.

Sur f aces t hat cont ai n l oose r ust , l oose mi l scal e, and ot her f or ei gn subst ances shal l be mechani cal l y- c l eaned by power wi r e- br ushi ng and pr i med wi t h f er r ous met al pr i mer . Pr i med sur f ace shal l be f i ni shed wi t h t wo ( 2) coat s of ext er i or oi l pai nt and vi nyl pai nt . Coat i ng f or each ent i r e pi pi ng ser vi ce shal l be an appr oved pi pe l i ne wr appi ng havi ng a mi ni mum coat i ng r esi st ance of 50, 000 Ohms per squar e f oot .

2. 3. 13 Resi st ance Wi r e

Wi r e shal l be No. 16 or No. 22 ni ckel - chr omi um wi r e wi t h TW i nsul at i on.

2. 3. 14 El ect r i cal Connect i ons

El ect r i cal connect i ons shal l be done as f ol l ows:

a. Exot her mi c wel ds shal l be " Cadwel d" , " Bundy" , " Ther mowel d" , or an appr oved equal . Use of t hi s mat er i al shal l be i n st r i ct accor dance wi t h t he manuf act ur er ' s r ecommendat i ons.

b. El ect r i cal - shi el ded ar c wel ds shal l be appr oved f or use on st eel pi pe by shop dr awi ng submi t t al act i on.

c. Br azi ng shal l be as speci f i ed i n Par agr aph: Lead Wi r e Connect i ons.

2. 3. 15 El ect r i cal Tape

Pr essur e- sensi t i ve v i nyl pl ast i c el ect r i cal t ape shal l conf or m t o UL 510.

2. 3. 16 Per manent Ref er ence El ect r odes

Per manent r ef er ence el ect r odes shal l be Cu- CuS04 el ect r odes sui t abl e f or di r ect bur i al . El ect r odes shal l be guar ant eed by t he suppl i er f or 15 year s ' ser vi ce i n t he envi r onment i n whi ch t hey shal l be pl aced.

El ect r odes shal l be i nst al l ed di r ect l y beneat h pi pe, or met al l i c component .

2. 3. 17 Casing

Wher e a pi pel i ne i s i nst al l ed i n a casi ng under a r oadway or r ai l way, t he pi pel i ne shal l be el ect r i cal l y i nsul at ed f r om t he casi ng, and t he annul ar space seal ed and f i l l ed wi t h an appr oved cor r osi on i nhi bi t i ng pr oduct agai nst i ncur si on of wat er .

PART 3 EXECUTI ON

3. 1 CRI TERI A OF PROTECTI ON

Accept ance cr i t er i a f or det er mi ni ng t he adequacy of pr ot ect i on on a bur i ed

Apr i l 2019 Page 15 SECTI ON 26 42 14. 00 10 under gr ound pi pe, t ank or met al l i c component shal l be i n accor dance wi t h NACE SP0169, NACE RP0193, NACE SP0285 and as speci f i ed bel ow.

3. 1. 1 I r on and St eel

The f ol l owi ng met hod a. shal l be used f or t est i ng cat hodi c pr ot ect i on vol t ages. I f mor e t han one met hod i s r equi r ed, met hod b. shal l be used.

a. A negat i ve vol t age of at l east mi nus 850 mi l l i vol t s as measur ed bet ween t he under gr ound component and a sat ur at ed copper - copper sul phat e r ef er ence el ect r ode connect i ng t he ear t h ( el ect r ol yt e) di r ect l y over t he under gr ound component . Det er mi nat i on of t hi s vol t age shal l be made wi t h t he cat hodi c pr ot ect i on syst em i n oper at i on. Vol t age dr ops shal l be consi der ed f or val i d i nt er pr et at i on of t hi s vol t age measur ement . A mi ni mum of mi nus 850 mi l l i vol t s " i nst ant of f " pot ent i al bet ween t he under gr ound component bei ng t est ed and t he r ef er ence cel l shal l be achi eved over 95 per cent of t he ar ea of t he st r uct ur e. Adequat e number of measur ement s shal l be obt ai ned over t he ent i r e st r uct ur e, pi pe, t ank, or ot her met al l i c component t o ver i f y and r ecor d achi evement of mi nus 850 mi l l i vol t s " i nst ant of f . " Thi s pot ent i al shal l be obt ai ned over 95 per cent of t he t ot al met al l i c ar ea wi t hout t he " i nst ant of f " pot ent i al exceedi ng 1200 mi l l i vol t s.

b. A mi ni mum pol ar i zat i on vol t age shi f t of 100 mi l l i vol t s as measur ed bet ween t he under gr ound component and a sat ur at ed copper - copper sul phat e r ef er ence el ect r ode cont act i ng t he ear t h di r ect l y over t he under gr ound component . Thi s pol ar i zat i on vol t age shi f t shal l be det er mi ned by i nt er r upt i ng t he pr ot ect i ve cur r ent and measur i ng t he pol ar i zat i on decay. When t he pr ot ect i ve cur r ent i s i nt er r upt ed, an i mmedi at e vol t age shi f t wi l l occur . The vol t age r eadi ng, af t er t he i mmedi at e shi f t , shal l be used as t he base r eadi ng f r om whi ch t o measur e pol ar i zat i on decay. Measur ement s achi evi ng 100 mi l l i vol t s decay shal l be made over 95 per cent of t he met al l i c sur f ace bei ng protected.

c. For any met al l i c component , a mi ni mum of f our ( 4) measur ement s shal l be made usi ng subpar agr aph a. , above, and achi evi ng t he " i nst ant of f " pot ent i al of mi nus 850 mi l l i vol t s. Two ( 2) measur ement s shal l be made over t he anodes and t wo ( 2) measur ement s shal l be made at di f f er ent l ocat i ons near t he component and f ar t hest away f r om t he anode.

3. 1. 2 Aluminum

Al umi num under gr ound component shal l not be pr ot ect ed t o a pot ent i al mor e negat i ve t han mi nus 1200 mi l l i vol t s, measur ed bet ween t he under gr ound component and a sat ur at ed copper - copper sul phat e r ef er ence el ect r ode cont act i ng t he ear t h, di r ect l y over t he met al l i c component . Resi st ance, i f r equi r ed, shal l be i nser t ed i n t he anode ci r cui t wi t hi n t he t est st at i on t o r educe t he pot ent i al of t he al umi num t o a val ue whi ch wi l l not exceed a pot ent i al mor e negat i ve t han mi nus 1200 mi l l i vol t s. Vol t age shi f t cr i t er i on shal l be a mi ni mum negat i ve pol ar i zat i on shi f t of 100 mi l l i vol t s measur ed bet ween t he met al l i c component and a sat ur at ed copper - copper sul phat e r ef er ence el ect r ode cont act i ng t he ear t h, di r ect l y over t he met al l i c component . The pol ar i zat i on vol t age shi f t shal l be det er mi ned as out l i ned f or i r on and st eel .

3. 1. 3 Copper Pi pi ng

For copper pi pi ng, t he f ol l owi ng cr i t er i a shal l appl y: A mi ni mum of 100

Apr i l 2019 Page 16 SECTI ON 26 42 14. 00 10 mi l l i vol t s of cat hodi c pol ar i zat i on bet ween t he st r uct ur e sur f ace and a st abl e r ef er ence el ect r ode cont act i ng t he el ect r ol yt e. The pol ar i zat i on vol t age shi f t shal l be det er mi ned as out l i ned f or i r on and st eel .

3. 2 TRENCHI NG AND BACKFI LLI NG

Per f or m t r enchi ng and backf i l l i ng i n accor dance wi t h Sect i on 31 00 00 EARTHWORK. I n t he ar eas of t he anode beds, al l t r ees and under br ush shal l be c l ear ed and gr ubbed t o t he l i mi t s shown or i ndi cat ed. I n t he event r ock i s encount er ed i n pr ovi di ng t he r equi r ed dept h f or anodes, det er mi ne an al t er nat e appr oved l ocat i on and, i f t he dept h i s st i l l not pr ovi ded, submi t an al t er nat e pl an t o t he Cont r act i ng Of f i cer . Al t er nat e t echni ques and dept hs must be appr oved pr i or t o i mpl ement at i on.

3. 3 INSTALLATION

3. 3. 1 Anode I nst al l at i on

Unl ess ot her wi se aut hor i zed, i nst al l at i on shal l not pr oceed wi t hout t he pr esence of t he Cont r act i ng Of f i cer . Anodes of t he s i ze speci f i ed shal l be i nst al l ed t o t he dept h i ndi cat ed and at t he l ocat i ons shown. Locat i ons may be changed t o c l ear obst r uct i ons wi t h t he appr oval of t he Cont r act i ng Of f i cer . Anodes shal l be i nst al l ed i n suf f i c i ent number and of t he r equi r ed t ype, s i ze, and spaci ng t o obt ai n a uni f or m cur r ent di st r i but i on over t he sur f ace of t he st r uct ur e. The anode syst em shal l e desi gned f or a l i f e of 25 year s of cont i nuous oper at i on. Anodes shal l be i nst al l ed as i ndi cat ed i n a dr y condi t i on af t er any pl ast i c or wat er pr oof pr ot ect i ve cover i ng has been compl et el y r emoved f r om t he wat er per meabl e, per manent cont ai ner housi ng t he anode met al . The anode connect i ng wi r e shal l not be used f or l ower i ng t he anode i nt o t he hol e. The annul ar space ar ound t he anode shal l be backf i l l ed wi t h f i ne ear t h i n 6 i nch l ayer s and each l ayer shal l be hand t amped. Car e must be exer ci sed not t o st r i ke t he anode or connect i ng wi r e wi t h t he t amper . Appr oxi mat el y 5 gal l ons of wat er shal l be appl i ed t o each f i l l ed hol e af t er anode backf i l l i ng and t ampi ng has been compl et ed t o a poi nt about 6 i nch above t he anode. Af t er t he wat er has been absor bed by t he ear t h, backf i l l i ng shal l be compl et ed t o t he gr ound sur f ace l evel .

3. 3. 1. 1 Si ngl e Anodes

Si ngl e anodes, spaced as shown, shal l be connect ed as speci f i ed t o t he pi pel i ne, al l owi ng adequat e s l ack i n t he connect i ng wi r e t o compensat e f or movement dur i ng backf i l l oper at i on.

3. 3. 1. 2 Gr oups of Anodes

Gr oups of anodes, i n quant i t y and l ocat i on shown, shal l be connect ed t o an anode header cabl e. The anode header cabl e shal l make cont act wi t h t he st r uct ur e t o be pr ot ect ed onl y t hr ough a t est st at i on.