Ultrasonic Procedure

7/18/2019 Ultrasonic Procedure

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ULTRASONIC INSPECTION

PROCEDURE

APPROVAL

Name Function Date Signature

Author Gary E. Kinter ASNT Level III UT 2-5-2013

Approved B

REVISION HISTORY

Revi!ion No" Revie#ed B Approved B Date Signature



INDEX1.0 SCOPE

2.0 DESCRIPTION

3.0 APPLICATION DOCUMENT

4.0 PERSONNEL

5.0 EQUIPMENT

5.1 APPARATUS

5.2 SEARCH UNIT

5.3 COUPLANT

5.4 BASIC CALIBRATION BLOCKS

5.5 BASIC CALIBRATION HOLE

5.6 CALIBRATION

6.0 PROCESS

6.2 APPLICATION

6.3 ANGLE BEAM

6.4 EXAMINATION PROCEDURE (ANGLE BEAM)

6.5 STRAIGHT BEAM METHODS

6.6 EXAMINATION PROCEDURE

6. TESTING AND PIPE MATERIAL

.0 ACCEPTANCE STANDARD

!.0 ILLUSTRATION SCAN TECHNIQUE

A. REPORTS



SUBJECT: ULTRASONIC EXAMINATION

1.0 SCOPE

1.1 This procedure covers the requirement for Ultrasonic examination of any welded

material of any size, shape, thickness or configuration capale of conductingsound as may e required y the client specification and y various codes under

which a component, or system is eing designed and manufactured.

1.! "#"$%& certifies that this document meets the minimum requirements of the

%'$" section (. %rticle (. and any other code or specification reference methods

of Ultrasonic examination as defined y %'$" section (. %rticles

!.0 DESCRIPTION

!.1 Ultrasonic examination of materials y the pulse)echo method uses

straight)eam longitudinal waves introduced y direct contact of the search unitwith the material eing examined. *t series of electrical pulses, is applied to a

piezoelectric element +transducer which converts these pulses to mechanicalenergy in the form of pulsed wave at a nominal frequency. The transducer is

mounted in a holder so it can transmit the wave into the material through a

suitale wear surface and couplant. The assemly of transducer, holder wear)face, and electrical connector comprise the search unit.

The Ultrasonic instrument amplifies the electrical signal from the transducer anddisplays the reflection and a &-T screen. The normal presentation on the &-T

screen is the % 'can/ with distance or metal travel read left to right on the

horizontal trace and the amplitude of the vertical signals represent magnitude of the reflect surface.

!.! o useful quantitative information can e otained with standard

Ultrasonic methods without first carefully calirating as to metal traveland reflector size vs vertical signal amplitudes.



.0 APPLICABLE DOCUMENTS

.1 The following documents are made a part of this procedure to the extent specified.

American Societ o! Mec"anica# En$ineer %ASME&

'ection * 2ower 3oiler

'ection (*** 2ressure

American Nationa# Stan'ar' In(tit)te %ANSI&

31.1 2ower 2iping31. &hemical plat 4 2etroleum -efinery 2iping

American Societ !or Te(tin$ an' Materia# %ASTM&

" 156 'tandard $ethod for &ontact *nspection of 7elding

American Societ !or Non* De(tr)cti+e Te(tin$ %ASNT&

'T)T& 1% #T 2ersonnel 8ualification and certification

"#"$%& '"-(*&"'

8% "xaminer 2ersonnel 8ualification and &ertification

6.0 PERSONNEL

6.1 2ersonnel performing Ultrasonic examination to this procedure

shall e qualified and certified in accordance with 'T)T& 1% tale 1)c,

8% "xaminer personnel 8ualification and certification.

6.! 2ersonnel responsile for performing Ultrasonic "xamination to

this procedure shall e certified as level * +9perator :evel ** +*nspector

or :evel *** +*nspector "xaminer

6. 9nly certified :evel ** or level *** personnel shall make

determination as to the acceptaility of the Ultrasonic indication.



;.0 E,UIPMENT

;.1 APPARATUS< %n Ultrasonic, pulsed, reflection type of instrument shall e used for this inspection the minimum frequency range of the system

shall e 1 to ; $'=. *t shall have calirated deciel control +accurate over

its useful range to >4)!0? or >4)!01 of the nominal attenuation ratiowhich allow measurement of signals eyond the linear range of the

instrument.

a. The Ultrasonic *nstrument shall provide a linear presentation +within >4);

percent for at least @;? of the screen height sweep)line to top of screen.

. &aliration Arequency< "quipment shall e calirated every six

months. &aliration records shall maintained at the Bo site wherethe equipment is eing utilized +see para ;.5.

;.! SEARCH UNIT

;.!.1 'traight eam transducers shall have to nominal frequency or !.!;

$C= unless variales such as grain structure material thickness etc.require the used of other frequencies

;.!.! %ngle eam transducer shall have a nominal frequency of !.!;

$C= unless varies such as grain structure, material thickness etc. require

the use of other frequencies.

;.!. The refracted angle of the sound eam in the production material

shall e etween 60) @; degree inclusive. Tale 1 lists the

recommendation.

;.!.6 Transducer shall e fitted with suitale shoes as required to

maintain adequate sound penetration transducers to maintain proper sound eam angle in the part.

;.!.; 'upplemental transducer shoes for curved surface shall have the

same nominal radius of curvature as the material examined.

;.!.5 Transducer shall e used at their rated frequency

;. COUPLANT



;..1 % suitale couplant having good wetting characteristics such as

liquid detergent or paste and water shall e used. The same couplant shall

e used for caliration and examination. The sulfur and halogen contentof couplant shall not exceed 1? y weight.

;.6 BASIC CALIBRATION BLOC-S

;.6.1 #rilled hole shall e used as asic caliration reflector to estalish

a primary reference response of equipment and to construct adistance Damplitude correction curve. These holes shall e located either

in the production material or in a asic caliration lock or similar

metallurgical. 'tructure and the same or an equivalent. 2)numer

grouping as the production material. Aor the purpose of this procedure 2)numers 1, , 6 and ; material considered to e equivalent.

a. The thickness of asic caliration locks if used, shall e related to the

finished component thicknesses as shown in figure 1 where two morethicknesses are involved, the caliration lock thickness shall e

determined from the thickness of the component where the search unit isapplied.

. Aor examination of circumferential welds will contact surfacecurvatures greater than !0)in diameter, that asic caliration locks or

lock of essentially the same curvature as the part to e examined shall e

used



c. The asic caliration lock contact surface shall e curved for

contact surface curvatures of less than !0)in diameter. % single curved

asic caliration may e used to calirate the examination on contact

surface in the range of 0.E to 1.; times the asic caliration lock diameter. Aor example an F)in diameter curved lock may e used to

calirate the examination on contact surface in the range of curvature

range from @.! to 1!)in diameters. The curvature range from 0.E6 to Dindiameter requires 5 lock curvature as indicated in figure 6.

d. The asic caliration lock for examination of longitudinal weldsshall e of essentially the same nominal diameter as the part to e

examined, except that for diameter greater than !0 inches, flat lock may

e used.

;.; BASIC CALIBRATION HOLE;.;.1 The asic caliration hole shown in figure shall e drilled

parallel to the contact surface of the asic caliration lock or thecomponent. The location depth and diameter of this hole shall e otained

from the tale in figure .

;.;.! Cowever other caliration reflectors may e used provided equivalent

response to that from the asic caliration hole are demonstrated.

-eference Aigure 1 and !.

;.5 CALIBRATION

;.5.1 &aliration of the proes for eam angle is required on the **7+*nternational *nstitute of 7elding test lock or other approved alternative+for example the (! lock at least daily caliration of the flaw detector

time ase and amplification shall e carried out efore examining each

weld.

5.0 PROCESS

5.1 SUR.ACE PREPARATION

5.1.1 &ontact surface the finished contact surface shall e free

from weld spatter and any roughness that would interfere with free

movement of the search unit or impair the transmission of Ultrasonic

(iration.

5.1.! 7eld surfaces<The weld surface shall e finished so it cannot mask or e

confused with reflection from defects and should merge smoothly into thesurface of the adBacent ase materials.



5.1. 3ase $aterial< The volume of ase material through which the sound will

travel in angle eam examination shall e completely scanned with a

straight eam search unit to detect reflectors which might affectinterpretation of angle eam results. This is not intended as an acceptance

reflection examination.

5.! APPLICATION

5.!.1 The principal oBective of the method given herein is the detection,

location and evaluation of defects within the weld and heat affected zones.

The welds shall e examined y the angle eam method where practical.*n the examination of weldments where geometry or the condition

descried in 5.1. does not allow angle examination from oth sides of the

weld from single surface or a comination of surface, either a comination

of angle eam and straight eam or straight eam in two +! directions atE0 degrees to each other shall e used.

5. AN/LE BEAM METHODS

5..1 #istance) %mplitude &orrection<)&ompensation for the distance traversed

y the Ultrasonic eam as it passes through the material is provided y theused of the curves shown y figure ;. or electrically.

a. #etermination of &urves< #istance amplitude correction curves shall

e constructed y utilizing responses from the asic caliration descriedin ;.;. The first point on the curve is otained y placing the search unit

as near as possile, ut not less that 4F vee)path or !)in whichever is less

from the caliration hole and positioning for maximum response.

. The gain control is then set so this response is F0 percent of full screen on

the cathode ray tue +&-T This is the primary reference response.

c. 7ithout chaining the gain, the search unit shall e placed similarly at other

position covering the expected examination distance range, and the

corresponding response marked or the &-T screen.

d. These points are Boined y a smooth line whose length should cover the

examination range. 'ee figure ;.

5..! "lectronic #istance %mplitude &orrection< *f an electronic distance D

amplitude correction device us used primary reference response shall eequalized at ;0 percent of full &-T screen height over the distance range

to e employed in the examination.



5.. Transfer $ethod< Transfer method is used to collate the responses from

the asic caliration lock and from the component. Transfer isaccomplished y noting the reference reflector in the asic caliration

lock and from component and correcting for the difference. The

reference reflector may e (/ notches +which must susequently eremoved, an angle eam search unit acting as a reflector, or any other

reflector which will aid in accomplishing the transfer.

% V*NOTCH TRANS.ER TECHNI,UE

G % (/ otch may e placed in the asic caliration lock. %s an

example, this notch may e 1)in long, have a depth of 1 percent of the lock thickness and have an included angle such that the side of the (/ D

otch are perpendicular to the incoming sound wave. %nother (/ notch

having the same dimension may e placed in or adBacent to the weld eam.

G The 'earch unit is positioned for maximum response from the notch in the

asic caliration lock and response reading is recorded. Then the searchunit is positioned for maximum response from the notch in the test

material to e examined and this response reading is also recorded.

G %fter determining the aove readings. *t is necessary to correct the

response otained from (/ notch in the test material to the response level

from the (/ Dnotch in the caliration lock y adding or sutractingattenuation +d

G The original distance amplitude correction curve can now e used for

signal amplitude reBection of flaws.

3 PITCH CATCH METHOD

7hen (/ Dnotches are not permitted in the test material, the pitch catchmethod may e used. *n this method, a second angle eam search unit is

used to receive the sound transmitted y the search unit which is to e

ultimately used in the examination.

G &onnect the second angle search unit to the receive connection of the

instrument and switch on the caliration lock and manipulate the two

search units until a maximum response is shown on the &-T mark thislevel on the &-T

G The transit and receive search units are then placed on the production

material so that the sound eam travels from the single transmit search



unit through the material and into the receiver unit. *t is again necessary to

peak in the response and mark the level on the &-T.

%s with the (/)notch method, correct the response from the test material

y adding or sutracting attenuation +d. Aollowing disconnection of the

receive search unit and switching of the instrument ack to the pulse)echomethod, the distance)amplitude correction curve originally drawn on the

&-T screen is satisfactory for use as a signal amplitude reBection level.

& .RE,UENCY O. TRANS.ER METHOD USED

G (essels< The transfer method shall e used at least once for each 10 feet of weld or less per plate and shall e performed at least twice for each type of

welded Boint.

G 2iping<The transfer method shall e used as a minimum once for each

welded Boint for pipe size 10 inches in diameter and over, once for each ;feet of weld for pipe less than 10 inches in diameter.

5.6 EXAMINATION PROCEDURE %AN/LE BEAM&

5.6.1 &overage< 7here possile, utt welds shall e examined over 100? of the

area from oth side of the weld usually from only one surface.

5.6.! 'canning< 7hen possile, scanning shall e performed at a gainsetting of ! times or 5 d the reference level sensitivity.

a. To assure complete coverage of the examined material each pass of the search unit shall overlap a minimum of 10 ? of the transducer

width. The rate of manual scanning shall not exceed 5 inches per

seconds.

5.6. -eference :evel< The reference level sensitivity for evaluating

discontinuities is the primary reference response corrected for distance y

the distance amplitude curve or electronically, and modified y thetransfer method, if used.

5.6.6 DETECTION O. DISCONTINUITIES PARALLEL TO THE 0ELD

a. 'canning $ethod< The search unit shall e placed on the contact

surface with the eam aimed at aout E0 degrees to the weld and

manipulated laterally and longitudinally so the Ultrasonic eam passes through all of the eam to the reflector.



. Two search units technique< Technique using two search units may

e used to detect lack of penetration in doule welded utt Boints.

5.6.; DETECTION O. DISCONTINUITIES TRANSVERSE TO THE

0ELD

*f the weld surface has een made sufficiently smooth, the search unit may e placed on the center line of the weld and the eam directed along the

weld to scan the entire depth and width of the weld. %s an alternate, two

search units may e placed on the contact surfaces adBacent to the weld,one on each side forming an angle of 6; degrees or less with the axis if the

weld.

5.; STRAI/HT BEAM METHODS

5.;.1 &aliration of equipmenta. #istance) %mplitude &orrection< % distance amplitude correction

curve need not e constructed when the thickness of material isless than 1 D inch. Aor thickness using the proper asic caliration

lock +see figure 1 and !, the search unit shall e positioned for

maximum response from the asic caliration hole at H T and thesignal amplitude shall e adBusted to ;0? of full &-T screen. This

is the primary reference response. 7ithout changing the gain

control, the search unit shall then e positioned for maximumresponse from asic caliration hole at 46 T, its amplitude marked

on the &-T screen and the two points Boined with a straight line

extended to cover the test range.

. "lectronic #istance)%mplitude &orrection #evice< The primary

reference response shall e equalized over the distance range to e

employed in the examination.

c. reference :evel< The reference level for monitoring discontinuities

is the primary reference response corrected y a distance)amplitude curve or electronically.

5.5 EXAMINATION PROCEDURE

5.5.1. 'canning $otion< The weld shall e examined y moving thesearch unit progressively along and across a sufficient contact area

so as to scan the entire weld

5.5.! 'ensitivity :evel< 7hen possile, scanning shall e performed at aminimum gain setting of twice +5 d the primary reference level.



"valuation of discontinuities shall e done with the gain control set

at the reference level.

5.5. $onitoring of 2rocedures< 2enetration shall e verified y

+1 otaining a reflection from an opposite parallel

surface, or+! otaining the ack reflection o similar material

while using approximately the same length of sound travel.

5.5.6 To assure complete coverage of the examined material each pass of

the search unit shall overlap a minimum of 10? of the transducer

width. The rate of manual scanning shall not exceed 5)inches per

second.

5.5.; "valuating of *ndications< %ll indication which produce a

response greater than !0? of the reference level shall e

investigated to the extent that the operator can evaluate the shape,identity, and location of all such reflectors in terms of the

acceptance D reBection standards of the referencing cid section.

5.@ TESTIN/ AND PIPE MATERIAL

[email protected] Ultrasonic testing practice shall e in accordance with 3' ;EE5using technique ! +Alaw echo 4 ottom echo ratio for sizing the

lamination, or technique +multiple echo pattern, depending on

wall thickness and type of lamination +if any encountered. The

proe shall e scanned in a zigzag fashion in a zone 100mm widearound planned cut)outs for nozzles, and ack from the new end of

pipes which have een cut. :aminar defects shall not e accepted

if they exceed 5)mm in any dimension. %ny lamination not parallel to the pipe surface shall e deemed unacceptale.

@.0 ACCEPTANCE STANDARDS

@.1 %ll indications which produce a response greater than !0?

of the reference level shall e investigated to the extent that the

operator can determine the shape, identity, and location of all suchreflectors and evaluate them in terms of the acceptance reBection

standard as follows<

@.! #iscontinuities are unacceptale i f the amplitude exceeds the

reference level and discontinuities have lengths which exceed.



a. H ) inch font up to I ) inch inclusive

. 14 Dinch font from I )inch to ! H ) inch inclusive

I) inch font over ! H ) inch

Note< 7here this the thickness of the weld eing examined, if a weld

Boins two memers having different thickness at the weld, this thethinner of these two thickness.

@. 7here discontinuities are interpreted to e cracks, lack of fusionand incomplete penetration, they are unacceptale regardless of length.

@.6 EXAMINATION O. REPAIRS:

@.6.1 -epairs shall e re)examined y the same procedure usedfor original detection of the discontinuity

@.; ACCEPTANCE STANDARD

@.;.1 #efects shall e identified primarily y accurate positioning of the source of the echo in the weld cross section, and

their approximate orientation determined y comparing the echoesreceived from each. 7hen the examination show indication of a

defect the following shall apply.

a. %ll reflection giving an indication in excess of !0? #%& shall e

investigated to the extend that they can e evaluated in terms of the

acceptance standard.

. %ll reflector giving an indication in excess of ;0? #%& shall einvestigation to the extend that they can e evaluated in term of

acceptance and recorded on the report.

c. %ll reflectors in excess of 100? #%& shall e cause for reBection.

@.;.! %ny weld, which as a result of ultrasonic examination, and which

in the opinion of the company exhiit imperfection greater than thelimits stated in %2*)1106, latest edition or as superseded in this

article shall e considered defective and shall e so e marked with

an identification paint marker.

*n addition to the %2*)1106 requirements, the welds containing,

cracks, including crater cracks regardless of size or location, shall e deemed unacceptale.

%rc urns or strikes shall e deemed unacceptale and shall for

sour service gas4 oil lines addition to the %2* 1106 requirements,the following shall apply



a. %ny amount of inadequate penetration of the root ead as defined

y %2*)1106 shall e unacceptale.

. %ny amount of incomplete fusion etween the root and the level as

defined y %2* 1106 shall e unacceptale

c. Un)repaired urn)through area shall e unacceptale

F REPORTS

F.1 Ultrasonic examination *nspection -eport shall e filled outcompletely y qualified personnel and the report shall e signed y

the certified inspector.

F.! %ll recordale indications shall e shown on the technique sheet.

&opies of technique sheet +s shall e sumitted with each

inspection report

F. % test report shall e issued for each weld with all the relevant

data, including ut not limited to the following

a. -eport numer

. 7eld numer

c. *sometric 4 :ine umer

d. $aterial thickness

e. &ouplant

f. 2roes used, size and frequency

g. &aliration technique

h. 'urface condition

i. ame of 9perator



B. %cceptance &ode

k. -eportale defects and disposition and sketch

l. #'J 2roe caliration &hart

B THIC-NESS CHEC- MEASUREMENT

SCOPE

The scope of work descrie in this page spelt out requirement necessary for the corrosion

monitory wall thickness examination of vessel, process lines and facilities.

,UALI.ICATION O. PERSONNEL

a1 ULTRASONIC INSPECTION

*nspector shall hold a current certificate of proficiency in ultrasonic issued y a national

recognized certification scheme for non) destructive testing +%'T shall e used for the

purpose of qualification of personnel. %lternatives qualifications shall only e deemedacceptale with the prior consent of the client and 4 or inspecting authority.

E,UIPMENT AND MATERIAL

a1 Ultrasonic flow detectors with a well define %) scan present

21 ULTRASONIC CALIBRATION BLOC-S

i **7 v41 caliration locks

ii **7 v4! caliration locks

iii *97 eam profile locks

c1 ULRASONIC PROBES

10mm to !;mm crystal diameter proes shall e used a frequency ! $C = to ; $C=. The

types of proe required depend on the thickness of the material eing examined.

TYPES O. PROBE

i %ngel proe

ii ormal proe

iii Transmit proe

PROBE SENSITIVITY

Com3re((ion 0a+e Pro2e 4 Lon$it)'e(

% minimum of 60d3 of gain shall e in reserve when the first ack wall echo from the

dimension of the II05I lock is set at 100? full screen height.



ii& ("ea+e 6a+e 3ro2e 4 tran(+er(e

% $inimum of 60d3 of gain shall e in the 100mm quadrant on the II0 V5I

2#oc7 is set at 100? full screen height.

RESOLUTION O. PROBES

S"ea+e 0a+e Pro2e:

IO0 eam spread lock shall e used to assess resolution. This should e doneaccordance to the acceptance standard.

COMPRESION 0AVE PROBES

-esolution shall e assessed using the **7(4* caliration shall e considered acceptancewhen the three echoes at 100mm, E1mm and F;mm are clearly defined.

BEAM PRO.ILE

The eam spread of proes shall e estalished using the *07 lock and !0d3 drop

method and eam profile recording on the tracing paper or clear 2erspex.

OTHER E,UIPMENT &alirated -ule

Tape measure

7elding JaugeAlaw light location plotting oard

THIC-NESS SURVEY O. PIPIN/

*sometric drawing is usually employed in representing pipelines with particular referenceto welds, valves, pumps, flanges and cap ends. The position of each measurement point

clearly marked and referenced to the nearest up weld, value etc.

MEASUREMENT

a. (ertical piping work and pipe work inclined at 6;0 to horizontal<

Aour measurements shall e made around the circumference of the pipe located at plat) form orth and 'outh +or "ast and 7est and top and ottom of pipe.



. Corizontal -eading< -equirement with pipe work inclined at 6;

0

horizontally, see sketches aove.

9ther methods of measurement include ultrasonic reading. The procedure for method

forms the asis for the data management system and is specific for the individuals piping items.

% grid scan at 100? can e carried out as suspect area of piping with evidence of

gross corrosion or significance loss wall thickness.

Nort"

0e(t So)t"

Ea(tNort" * 6e(t

To3

So)t"

Bottom

HORI8ONTAL

VERTICAL



THIC-NESS SURVEY O. VESSELS

'ketches are always produced for any vessels to show the plan and elevation, nozzleswelds, flanges plate etc of vessels. The measurement positions are normally marked on

the vessel concerned efore reading are taken. *t is normally advisale to apply

permanent markers on the reset to show measurement position.

READIN/ PROCEDURE:

Nort" Ea(tO)t(i'e

So)t" 0e(t VERTICAL

O)t(i'eTo3

BottomHORI8ONTAL



9ne measurement position on outside of end at mid point3end 1<5

1. $easurement position on outside of end equally spread.

!. $easurement position on each side of end at similar position as those on the out side

O)t(i'e

So)t" 0e(t

VERTICAL

In(i'e

HORI8ONTAL

OUTSIDE

BOTTOM

HORI8ONTAL

INSIDE



$easurement 2osition *nside 9n 3end

Tee 2ieces

. $easurement position on head of TK1 in centre, 1 offset E00 each of centre/ -eading procedure #

Transfer straight pipe length



STRAI/HT PIPE LEN/THS

10

E

F

@5

;

6

!

1VESSEL

MI 9



ULTRASONIC VESSEL0ALL

THIC-NESS SURVEY

"quipment descriptionTag no LLLLLLLLLLLLLLL:ocation LLLLLLLLLL flow sheet no LLLLLLLLLLLLLLL

ominal thickness +mm

&orrosion %llowance +mm$inimum %cceptance thickness +mm

READIN/ PROCEDURE E

7eld root scan D pipe over F/ D carry out weld root scans with sheave 4 compression proes asappropriate expected is report minimum thickness for 1! quadrants

-eading 2rocedure

END CAP + -eading to e taken

+6 $easurement around the circumstance adBacent to the weld, 1 measurement at the end

cap

1

!

6;

5

@

F

E

10

11 1!



ULTRASONIC INSPECTION REPORTPROJECT REPORT NO1

CLIENT RE,UEST NO1

LOCATION DATE O. TEST

CONTRACTOR ACC1 CRETERIA



PROCEDURE NO1 MATERIAL

CALIBRATION BLOC- SUR.ACE CONDITION

0ELD TYPE E,UIPMENT TYPE

OTHER DETAILS SERIAL NO1

COUPLANT

PERSONNEL



SENSITIVITY:

AN/EL PROBE SR1 NO1

M.R SONATEST

.RE,UENCY

MH8

PROBE

SI8E

PRIMARY

RE.1 LEVEL

TRANS.ER

CORRECTION

SCANNIN/

LEVEL

TOTAL

%'B&

COMMENTS:

EDEMAC SERVICES CLIENT

NAME:……………………………

DATE:…………………………….

SIGN:…………………………….

NAME:……………………….

DATE:………………………..

SIGN:…………………………

NAME:……………………

DATE:……………………..

SIGN:………………………



8.0 ILLUSTRATION OF SCANNINGTECHNIQUES



%. TYPICAL ;Y< %NODE& 0ELD

+% 00 compression proe scan on parent metal to check for laminations and to verify wall

thicknesses

+3 %ngle proe scan +minimum of proes) 6;0, 500, @00 from weld cap to full skip

distance plus weld cap width for coverage.

+& 00 compression proe scan to check for fusion defects +when accessile

9T"<'ound eam to e maintained perpendicular to the weld axis while scanning

BRANCH MEMBER

SCRIBE OR PUNCH MARK

BEFORE FIT-UPDETAIL “D”

DETAILS

“C” OR “D”DETAIL “B”

DETAILS

“A” OR “B”



B TYPICAL ;Y< %NODE& 0ELD

+% 00 compression proe scan on parent metal to check for laminations and to verify wall

thicknesses

+3 %ngle proe scan +minimum of proes) 6;0, 500, @00 from weld cap to full skip

distance plus weld cap width for coverage.

+& 00 compression proe scan to check for fusion defects +when accessile

9T"<'ound eam to e maintained perpendicular to the weld axis while scanning

DETAIL “A”

DETAIL “B”

DETAIL “C”

DETAIL “D”

ALTERNATE DETAIL “D”



&. SIN/LE ;V< BUTT 0ELD

+% 00 compression proe scan on parent metal to check for laminations and to verify wallthicknesses

+3 %ngle proe scan +minimum of proes) 6;0, 500, @00 from weld cap to full skipdistance plus weld cap width for full coverage.



#. DOUBLE ;V< BUTT 0ELD


+3 %ngle proe scan +minimum of proes) 6;0

, 500

, @00

from weld cap to full skipdistance plus weld cap width for full coverage.



". TYPICAL ;T< 0ELD


+3 %ngle proe scan +minimum of proes) 6;

0

, 50

0

, @0

0

from weld cap to full skipdistance plus weld cap width for full coverage.

+& 00 compression proe scan on face M/ to check for fusion defects +when accessile

+# %dditional angle proe scan +minimum of ! proes on face M/ when accessile

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Ultrasonic Procedure