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4 15 September 2004

Dammam, Saudi Arabia

API 510 PREPARATORYPoints To Recall Day 9

1. For MT (Art.7):

a. Yoke Type: Electromagnet or Permanent Magnet. Suitable or !urace "eect!.

b. Pro" Type: Electromagnet

Suitable or !urace#!ub$!urace "eect!

c. E%amination Me"ium: &ry po'"er or et Po'"er&ry po'"er !uitable or iger temperature!

". For Electromagnet!: E*uipment Ammeter! !all be cecke"

anually 'it a Ma!ter Ammeter. + ,ea"ing!to be taken an" !oul" be 'itin -$ 1/ o ull !cale.

e. 0iting Po'er o Yoke!

A !all a2e liting po'er o at lea!t 3.4 5g

& !all a2e liting po'er o at lea!t 16.1 5g

eigt too !all be cecke" prior to ir!t u!e

. Min. t'o e%amination! on eac area te !econ" i!

perpen"icular to ir!t

g. Pro" Spacing $ 8ot e%cee" 69 an" not le!! tan +9

. SE$7;7 ,T rea" out$ ,T - "irect rea" out

$ &irect tickne!! rea" out

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c. Searc

block. Te !econ" la!t back$eco coinci"e! to ?eroB te la!t

eco to te en" o !creen te !creen i! tu! calibrate" totickne!! o te calibration block.

e. ile taking mea!urement or ig temperature

con"ition a po!iti2e error o 1/ per 44C (1CF)

'ill re!ult!. ence temperature correction i! nece!!ary.

. ,T rea" out i! recommen"e" 'en relecting !urace i! corro"e" or roug.

+. Acceptance criteria are to be applie" to in"ication! an" not

actual !i?e o "i!continuity.

3. Te clori"e !alt! in ru"e in te pre!ence o 'ater (or "uring

!team !tripping) pro"uce! l aci" 'ic can attack te !teelan" in pre!ence o S te l i! regenerate" continuing te

corro!ion o !teel e*uipment!

Fe - l $$D Fel -

Fe0- l $$D FeS - l

4. Atomic y"rogen can cau!e y"rogen n"uce" racking () an"y"rogen li!tering () at ig temp (D6CF). n a""ition to an" te !teel become! !pongy a! metane ga! ormation

take! place by combining y"rogen 'it ree arbon 'ic i!coming rom "ecompo!ition o ementite.

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G. S 'ill cau!e an" "ue to ormation o Atomic y"rogen

"uring !ulpi"e corro!ion o !teel (Fe - S $$D FeS - ). an"

S al!o regenerate! l a! in (6) abo2e.

7. Ero!ion i! cau!e" "ue to ig 2elocity lo' o !oli" !u!pen!ion! inli*ui"! an" ga!e! or li*ui" !u!pen!ion! in ga!e!. ,.H.E. 2arie! a!

ube o 2elocity.

6. ntergranular corro!ion o autentic S.S. i! cau!e" "ue to

romium carbi"e precipitation at grain boun"rie! making tearea! clo!e to grain boun"rie! "epleting cromium belo'

!tainle!! limit o 11.4/.

;. @e!!el in!pection! are or Te !aety continuity reliability.

1. =rapiti?ation in arbon Steel! take! place "ue to prolonge"

e%po!ure in 64 to 13 "eg. F range re!ulting in "ecompo!itiono Steel into Ferrite ry!tal! an" =rapite 8o"ule!. n$!itu

Metallograpy i! u!e" to "etect te =rapiti?ation

11. E%ternal in!pection o Pr. @e!!el! an" E%canger! !oul" !tart

'it la""er! platorm! !tair'ay! connecte" to or bearing on2e!!el.

1. E%ternal !urace! o 2e!!el! !all be e%amine" or not only or

corro!ion but al!o or leak! crack! buckle! etc.

1+. any !ettling i! !een on 2e!!el no??le! an" a"Iacent !ell area

!all be in!pecte" or "i!tortion an" cracking.

13. ammer te!t !all be ollo'e" by !uitable 8&T.

14. =roun"ing connection re!i!tance !all not e%cee" 4 om! but 4

om! i! normally preerre".

1G. n pre!ence o aci"ic co ro"ent! (P J 7) y"rogen bli!tering i! e%pecte" abo2e an" belo' (clo!e to) li*ui" le2el.

17. Au%iliary e*uipment! (Pr. gauge! !igt gla!! !aety 2al2e! etc.may be 2i!ually in!pecte" 'ile in !er2ice.

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16. Fir!t !tep or internal in!pection i! re2ie' o pre2iou! recor"!.

1;. For ea2y 'all 2e!!el! at ig pre!!ure maIor concern i! crack "amage particularly at te 'el"! ( el" K AL).

. n pre!ence o aci"ic co ro"ent! (PJ7) y"rogen bli!tering i!

e%pecte" abo2e an" belo' (clo!e to) li*ui" le2el.

1. 0amination! run !lant 'ile crack! run normal to !urace.

. Spark te!ting i! eecti2e meto" or break!#leak! in paint gla!!

pla!tic an" rubber lining.

+.