API 570 Authorized Piping Inspector Preparatory Program * Open Book Mockup Examination Paper !
*
Instructions : Refer Applicable ASME/API ASME/API documents.
1.
What the MAWP MAWP is recalculated, the wall thickness used shall be the actual thickness minus: 1. 2. . !.
2.
The The est estim imat ated ed corr corros osio ion n los losss befo before re the the date date of the the next next insp inspec ectio tion n Twice wice the the est estim imat ated ed corr corros osio ion n los losss bef befor oree the the date date of the the nex nextt ins inspe pect ctio ion n Thre Threee time timess the the est estim imat ated ed cor corro rosi sion on los losss befo before re the the dat datee of the the nex nextt ins inspe pect ctio ion n The The est estim imat ated ed corr corros osio ion n los losss befo before re the the date date of the the next next insp inspec ectio tion n
The base metal is P "o.1, the weld metal is A "o.1, and the wall thickness is #$%&. What is the holdin' time at 11(()12((*+ 11(()12((*+ for heat treatment 1. 2. . !.
.
1 hour 2 hours hours Proced ocedu ure is is not not reuir uired ed for this this thic thickn kneess
What is the reuired thickness of strai'ht run pipe sub-ect to internal pressure onl, onl, based on the followin' conditions: "P/ 1!, /A 2%0 r., 3+W /piral seam 4"o radio'raph5, operatin' at 216 psi $ #%*+ 1. 2. . !.
!.
(.11& 1.1& (.(6& "ot enou'h information 'i7en
The radio'raph of a "ormal +luid ser7ice pipin' weld re7ealed a crack. What is the acceptable crack len'th if the pipe wall was (.#08 1. 2. . !.
"one T$ $169 racks wi will no not sh show on ra radio'raphs
0. eometric unsharpness of the radio'raph of a component under 29 th1ck a. b. c. d.
shall not exceed
(.(2(9 (.((9 (.(!(9 (.(0(9 4AP;)0#()Mockup2)<=5 4AP;)0#()Mockup2)<=5 2$1(
6.
What is the maximum =rinell hardness of base metal P)68 1. 2. . !.
#.
2!1 2#( 2%1 not specified
What is the minimum holdin' time of /A)1(6 rade =, 1 inch thick 1. 2. .
2.! hours 2 hours 1 hour
material8
!. %.
not specified
What is the workin' pressure of a 10( ;b. flan'e, /A 0( r.>+6 > 1, used at !((*+8 1. 2. . !.
2( psi' 2(( psi' 1#( psi' 1!( psi'
?. What is the minimum class flan'e that can be used if the material is /A temperature ?0(*+ and workin' pressure is 1?( psi' 1. 2. . !. 1(.
The preheat @one shall extend beond each ed'e of a pipe weld 1. 2. . !.
11.
%(( ?(( 10(( This material can not be used at this temperature
1& 2& 2T T
What is the root face limitation as listed on the attached WP/ and PB 1. 2. . !.
$2& 1$%& "o limit "ot desi'nated
01 r. +%,
4AP;)0#()Mockup2)<=5 $1( 12.
;f the supportin' PB is used, are the P)noCs correct on the attached WP/8 1. 2. . !.
1.
;s the thickness ran'e on the WP/ supported b the PB8 1. 2. . !.
1!.
6 side bends 2 face and 2 root bends 1 side, 1 face and 1 root bend "o side bends reuired
PWFT is reuired for all thicknesses of pipin' o7er G inch for which of the followin' materials8 1. 2. . !.
1#.
"o, because BT is not allowed durin' PB ualification "o, because there are not enou'h tensile tests "o, because peenin' is allowed b A/M3 =1. Des
What should ha7e been the correct number and tpe of 'uide bends on the PB8 1. 2. . !.
16.
Des "o Be ualification is reuired b AP; 0#( Be ualification is reuired b A/M3 /ection E
;s the attached PB properl ualified8 1. 2. . !.
10.
Des "o ould be if properl preheated "ot enou'h information
P "os. 1 and 2 P "os. 1 and P "os. 2 and P "os. ! and 0
"P/ 12, /ch %( and /ch 16( pipes 4M.<. H A 1(6 'r =5 are to be used at I1(J . Ketermine whether, 1. 2. . !.
=oth pipes reuire impact testin'
4AP;)0#()Mockup2)<=5 !$1( 1%.
A 6& "= /ch !( pipe is selected for followin' conditions. Kesi'n Pr H 6( psi Kesi'n Temp. H (( de'rees + M.<.. H A 0 'r = 43BW5 orrosion Allowance H 2.( mm Assume standard mill tolerance Dour assessment is: 1. Pipe desi'n meets code reuirement 2. Pipe desi'n does not meet code reuirement . Kepends on opinion of Pipin' ;nspector !. Kepends on opinion of Pipin' Kesi'n 3n'ineer
1?.
A pipin' installation was constructed out of material reuirin' impact testin'. +ollowin' two steel materials 4material A and =5 were tested for impact test results. These materials are to be used for repair work on pipin'. The test data is as follows: Materia" A# /MT/ H 60((( psi 4Keoxidi@ed5 Beadin' for specimen 415 H 16.( ft lb Beadin' for specimen 425 H 1#.0 ft lb Beadin' for specimen 45 H ?.0 ft lb
Materia" B# /MT/ H 6(,((( psi 4Keoxidi@ed5 Beadin' for specimen 415 H 10.( ft lb Beadin' for specimen 425 H 1!.( ft lb Beadin' for specimen 45 H 1(.( ft lb
1. 2. . !. 2(.
=oth material 4A5 and 4=5 are
21.
2.! inch and !. inch !. inch and 2.! inch 1.? inch and !.% inch "one of the abo7e
A +lat plate 4without -oints5 is used as permanent blank for flan'ed point with 'asket ;.K H 2(( mm Kesi'n pr. H 2(( psi. and safe stress 7alue for plate is 1%,((( psi, for 'i7en temperature of 20(o. what shall be the minimum blank thickness from 'i7en options. orrosion allowance is "il code of construction = 1.
% mm 1.
1( mm 2. .
12 mm 1! mm
4AP;)0#()Mockup2)<=5 0$1(
22.
A 1(6 'r = pipe after installation, reuired Fdrostatic leak test. +ollowin' data is presented Kesi'n pr H (( psi, Kesi'n temp H 0((J+. onsiderin' stress at desi'n as well as ambient temperature determine correct hdrotest pr. ;f test is carried out at ambient conditions. 1. 2.
!0( psi !#6 psi
. !.
2.
alculate pneumatic test pressure for abo7e pipin' considerin' stress correction. 1. 2. . !.
2!.
( psi #0 psi
!? psi ?6 psi !(% psi ( psi
Maximum =rinell hardness obser7ed 4after PWFT5 on followin' three points was as follows: oint 1: M< H P"
20.
;dentif incorrect statement$s: 1. 2. . !.
26.
All -oints are oka as per A/M3 = 1. oint 2, and are oka, -oint 1 not oka
;n impact test exemption cur7es, cur7e K represents better tou'hness material than cur7e = cur7e represents more brittle material than ur7e = +ull de)oxidi@ed steels are tou'her than non)deoxidi@ed materials N1C and NC
An A/TM A0 rade = pipe with a maximum wall thickness of (.#0& is bein' considered for use in a cold ser7ice. What minimum temperature can it be used and not ha7e an impact test8 1. O2( de'rees + 2. O10 de'rees + . O1( de'rees + !. ( de'rees +
4AP;)0#()Mockup2)<=5 6$1( 2#.
Which of the followin' fluid ser7ices or classes of pipin' are excluded from the specific reuirements of AP; 0#(8 1. 2. . !.
Fa@ardous fluid ser7ices below threshold limits defined b -urisdictional reuirements Pipin' or tubin' with an outside diameter not exceedin' that of "P/ G& "on)metallic pipin' and polmeric or 'lass)lined pipin' All of the abo7e
2%.
+or weldin' a 6 "= sch 16( low allo pipin' 41 Q R cr, 1$2R Mo5 to 42)Q r 1 Mo5 durin' plant erection, which of the followin' are applicable. Assume ST/ 7alue for both as #(((( psi 1. Preheat at (( o+ min. and PWFT in ran'e 1(( o+ I 1#0 o+ 2. "o preheatin' but PWFT in the ran'e 1(( ) 1!(( o+ . Preheatin' at 0( o+ min and PWFT in the ran'e 1(( ) 1#0 o+ !. Preheatin' at 0( o+ and no PWFT
2?.
PWFT was carried out on 2%( welds on pipes of P "o material in 2 batches of 4A5 2(( and 4=5 %( respecti7el. =atch A was carried out in furnace and =atch = b local heat treatment. +rom batch A, 2% samples and from =atch, !( samples were tested for =rinnel hardness. And brinnel hardness 7alues were between 2(% to 222 F= for batch A while for =atch = it was between 2(1 to 220 F=. Dour assessment is: 1. 2. . !.
(.
=atch A: sample si@e hardness both not acceptable =atch =: sample si@e hardness both
A/TM A 1(0 flan'e 4(( lb ratin'5 maximum sstem hdrostatic pressure shall not exceed: 1. 2. . !.
6(( psi !0( psi 111( psi 1120 psi
4AP;)0#()Mockup2)<=5 #$1( 1.
/uitable ratin' for pipe flan'es 4A1(05 for Kesi'n pr H !(( psi , desi'n temp H !(( o+ will be
1. 2. . !. 2.
A carbon steel A/TM A 0 rade = material is bein' impact tested. What is the minimum ener' reuirement for this material 4a7era'e for specimens)full deoxidi@ed steel58 1. 2. . !.
.
that calculated accordin' to A/M3 /ec. E;;; ode 1.1 times the desi'n pressure 1.20 times the operatin' pressure 1.0 times the desi'n pressure
What is the lon'itudinal weld -oint factor, 3-, for AP; 0> 3BW 43lectric Besistance Welded5 pipe8 1. 2. . !.
0.
# ft)lbs 1( ft)lbs 1 ft)lbs 10 ft)lbs
Where the desi'n temperature of the sstem is the same as the hdrostatic test temperature, the hdrostatic test pressure shall not be less than: 4Dield stress durin' hdrotest is not 'o7ernin' factor.5 1. 2. . !.
!.
6(( lb min. (( lb min !(( lb min "one of the abo7e
1.(( (.?0 (.%0 (.6(
N/& is defined as the stress 7alue for material from Table A)1 of A/M3 =1.. Pick the 7alue of U/& when the material is A/TM A0 rade P0 and the temperature is ?0( de'rees +. 1. 2. . !.
11,!(( psi 1(,6(( psi %,((( psi 2(,(( psi
4AP;)0#()Mockup2)<=5 %$1( 6.
The recommended downstream limit of circuit of an in-ection point is a minimum of: 1. second chan'e in flow direction past the in-ection point, or 20 feet beond the first chan'e in flow direction whiche7er is less 2. second chan'e in flow direction past the in-ection point, or 20 feet beond the first chan'e in flow direction whiche7er is 'reater . second chan'e in flow direction past the in-ection point, or 20 inches beond the first chan'e in flow direction whiche7er is less !. second chan'e in flow direction past the in-ection point, or 20 inches beond the first chan'e in flow direction whiche7er is 'reater
#.
+or external inspections for potential corrosion under insulation 4S;5 on lass 1 sstems, the examination should include at least percent of all suspect areas and percent of all areas of dama'ed insulation: 1. 2. . !.
%.
+or lass 2 pipin', the extent of S; inspections on a sstem operatin' 1. 2. . !.
?.
at I !0*+ will be:
#0 R of dama'ed areas, 0( R of suspect areas 0( R of suspect areas, R of dama'ed areas R dama'ed areas, 0( R of suspect areas "one of the abo7e
;n the =arlow formula for determinin' pipe thickness, the term N/& stands for: 1. 2. . !.
!(.
0(, #0 0(, #0, 0( 20, 1(
internal desi'n 'a'e pressure of the pipe in psi pressure desi'n stren'th for internal pressure, in inches allowable unit stress at the desi'n temperature, in psi maximum strain at the a7era'e operatin' temperature, in psi
Ketermine the linear expansion 4in$1(( ft5 of a carbon steel pipe between #( de'rees + and !0( de'rees + 1. 2. . !.
.(!& per 1(( ft .?& per 1(( ft 2.?& per 1(( ft .16& per 1(( ft
4AP;)0#()Mockup2)<=5 ?$1( !1.
A 2(C lon' carbon steel pipe is heated uniforml to !0( de'rees +. from #( de'rees +. Ketermine its len'th after heatin'. 1. 2. . !.
!2.
As per AP; 0#(, in case of normal uniform corrosion, compared to other pipin'. The thickness measurements on 7al7es: 1. 2. . !.
!.
. !.
exposin' areas to hi'h)7elocit and hi'h)turbulence streams excessi7e cclic stresses that are often 7er low exposure to chlorides from salt water, wash)up water, etc. creep of the material b lon' time exposure to hi'h temperature and stress 4AP;)0#()Mockup2)<=5 1($1(
An ei'ht)inch diameter pipin' sstem is installed in Kecember 1?#?. The installed thickness is measured as (.!&. The minimum thickness of the pipe is (.2(&. ;t is inspected in Kec$% and the thickness is found to be (.2&. An inspection Kec$%# re7eals a loss of (.(1& from the 12$%0 inspection was durin' Kec$%? the thickness was found to be (.2?&. The last inspection was durin' Kec$?0 and the thickness was found to be (.26&. What is the lon')term corrosion rate of this sstem8 1. 2. . !.
!#
Areas exposed to mist o7er)spra from coolin' water towers arbon steel pipin' sstems that normall operate in)ser7ice abo7e 20( de'rees but are in intermittent ser7ice Keadle's and attachments that protrude from insulated pipin' arbon steel pipin' sstems, operatin' between 20((+ and 6((( +
3n7ironmental crackin' of austenite stainless steels is caused man times b: 1. 2. . !.
!6.
Fi'her than actual thickness >ower than actual thickness Temperature has no effect on the ST readin's Whether readin's will be hi'her or lower depends on the ST examinerCs skill
ertain areas and tpes of pipin' sstems are potentiall more susceptible to corrosion under insulation. Which of the items listed is not susceptible to S; 8 1. 2.
!0.
Must be routinel taken at same freuenc while inspectin', other pipin' components as 7al7e thickness is less than other pipin' components Must be routinel taken at twice the freuenc as other pipin' components as 7al7es are 7er critical components and essential for reliable operation. Are not routinel taken unless unusual corrosion pattern and thinnin' is obser7ed durin' ser7icin' and repair. Are routinel at twice the freuenc of other components because 7al7es are more expensi7e items compared to rest of the pipin' and must be more freuentl checked.
The ST thickness measurements for pipes at ele7ated temperatures, the readin's 'enerall are corrected usin' thickness correction tables, because the readin's are normall 1. 2. . !.
!!.
2(.(02C 2(.26C 2(.21(C 2(.20(C
(.((0&$ear (.((#0&$ear (.((#0&$ear (.((20&$ear
Ssin' the information in uestion abo7e, calculate the short)term corrosion rate. 1. (.((0&$ear
2. . !. !%.
(.((#0&$ear (.((#0&$ear (.((20&$ear
Ssin' the short)term corrosion rate in uestions abo7e, determine the remainin' life of the sstem. 1. 1% ears 2. 10 ears . 12 ears !. "one of the abo7e
!?. Preheatin' to not less than de'rees + ma be considered as an alternati7e to post weld heat treatment for alterations or repairs of P)1, pipin' initiall post weld heat treated as a code reuirement 4ma not be used if the pipin' was post weld heat treated due to en7ironmental crackin' pre7ention5. 1. 2. . !. 0(.
10( 2(( (( 0(
;f an Uintelli'ent pi''in'& sstem is used to inspect buried pipin', what tpe of bends are usuall reuired in the pipin' sstem8 1. 2. . !.
+i7e diameter bends ?( de'ree pipe bends Ten diameter bends Three diameter bends )()()()()()
API 570 Authorized Piping Inspector Preparatory Program * API 570
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$o"ution
16.
Bef: = 1. , Table 1.1.1, Pa'e 6? orrect answer: d
1#.
12& /ch %( pipe, thk H 1#.!0 mm 12& /ch 16( pipe, thk H .2 mm A 1(6 r = is Uur7e =& material. Bef. +i'. 2.2.2A, ombination of I 1(oc and 1#.!0 mm is abo7e cur7e = 4Befer Table 2.2.2A for correct readin'5 ombination of I 1(oc and .2 is below cur7e = 12& /ch %( "o impact test 12& /ch 16( Beuire impact test orrect answer: b
1%.
tm H
PD 24 SE Py 5
C
s H 2(((( psi, 3 H (.%0 KH 16%.2% mm, DH(.!
H
6( x 16% .2% 2 2(((( x (.%0 6( x (.!
2
H 1.##O2 H .## tord H
.## (.%#0
! .( mm.
Thk of 6 & /ch !( H #.11 . . . safe orrect answer: a 1?.
Material A A7era'e of H
16 1#.0 ?.0
1!.
Ok .
Ealue of 1 is ?.0 ft lb V 1( ft lb not Ok . Material = A7era'e of H
10
1!
1(
1 .(
Ok .
Ealue of 1 is 1( ft lb Ok . orrect answer: c 2(.
"ett 3xpansion for 0(*+ H 3xp. up to 0(*+ I exp. up to 1((*+ H .2) (.! H 2.%6 +or 10( feet, Total 3xpansion H 1.0x2.%6H!.2?& X !.& "ett expansion for )0(*+ H 4 3xp. up to I 0(*+5)43xp. up to 1((*+5 H ) 1.2! I (.! H ) 1.0%. "e'ati7e si'n means it is actuall contraction
+or 10( feet, Total ontraction H 1.0x1.0% H 2.#& X 2.!& orrect answer: b
21.
tm
P
H
d g
H
2((
16 SE
O
x 2(( 16 x 1%,((( x 1
H ?.12 mm
O (
sa 1( mm
orrect answer: b 22.
Pt H 1.0 x P x
Stress at test temp Stress at design temp
H 1.0 x (( x
2(((( 1%?((
!#6.1? psi
orrect answer: b 2.
Pneumatic pr. H 1.1 x (( x
2(((( 1%?(((
!? .2 psi
orrect answer: a 2!.
P "o. ! P "o. 0 P "o.
Fardness Fardness Fardness
reuired 220 F= max. reuired 2!1 F= max. reuired 220 F= max.
orrect answer: d 20.
orrect answer: b 4incorrect answer5 Actuall, = is tou'her than A is tou'her than A and = K is tou'her than A, = and
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