8/11/2019 Setup Guide No 4 Weld Inspection Weldcheck

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Purpose

Equipment Required

Pre Inspection Setup

Single Frequency Weld Inspection (Weldcheck)Typical Welding Inspection Procedure (Single FrequencyInstruments):

Pre Inspection:

road!and Pro!e "#$P# (Paint Pro!e) WeldRe%erence Standard #"&$$'

Setup uide ote o *Weld Inspection

 These notes are ofered as a guide to help carry out a demonstration or weldinspection using the WeldScan Probes. The notes have been based on using oneo the Phasec/Locator Eddy urrent !nstruments.

Weldchec" instrumentWeld inspection "it

oating Thic"ness# ! the weld is coated i.e. painted$ it is important to ascertainthe thic"ness o this layer prior to the inspection to compensate or it. ! this isnot perormed incorrect sensitivity levels may be selected and thus possibledeects missed. This achieved with a %roadband Probe &Paint Probe' ()*P) and+eerence Standard )(,**-$ utilising the yellow plastic shims. Each shim is

approimately *.0 mm thic".ote# The re1uency used or this inspection is (* "23$ which is outside thenormal re1uency range 1uoted on the probe.

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Set up uide otes %or +oating E,aluation

-se similar settings as !elo./

Parameter

0alue

1ode ormalSingle

Frequency

"$ k23

Pro!e &!soluteain 456 7$d57$d

Filter2P58P

9+5#$$23

Inputain

2igh

9ri,e $

asic Paint Pro!e Settings

STEP

T&S 

(. +onnect Paint Pro!e to instrument and s.itch on/

4. alance pro!e in air/

). Place pro!e on Re%erence Stand Part o: #"&$$' a.ay %romE91 slots and edges and !y using the phase control rotate thesignal to o!tain a ,ertical signal amplitude/

. Increase the ; Full Screen 2eight (FS2) o% the signal to<"$$; FS2 !y using the gain control/

0. Position " plastic shim on re%erence standard and place pro!eon it= noting the ; FS2 o% the signal/ -sing the gain controlad>ust signal amplitude to appro?imately '$; Full Screen2eight (FS2)/

5. Remo,e pro!e %rom shim and place another shim on top o% theother/ ote ; FS2 o% the signal/

6. Repeat step * %or the remaining 7 shims/

-. o. the instrument has !een set up place the pro!e on thearea to !e inspection= noting the ; FS2 o% the signalamplitude/

7. 1atch the ; FS2 o% the signal %rom the inspection area to thatgi,en %rom the re%erence standard5shim com!ination/

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  Typical Signals o!tained %rom Shims

Setup uide oted %or Weld Inspection

Parameter

0alue

1ode ormalSingle

Frequency

"$$ k23

Pro!e ridgeain 456 @$d5@$

dFilter2P58P

9+5#$$23

Inputain

2igh

9ri,e A'

asic Weld Inspection Settings

STEP

T&S 

"/ 9isconnect the BPaint Pro!eC and connect a suita!le WeldScanPro!e/

#/

-tilising the Re%erence Standard Part o: #"&$$' (.ith thecorrect num!er o% shims) place pro!e on it a.ay %rom any E19slots and edges and !alance/

are 1etal D $

" Shim  

7 Shims "/$

# Shims "/@mm* Shims 7/$mmote# To enable to show

screen shot$ the phase hasbeen rotated by (*8 oreach coating thic"nessmeasurement.

9ow the thic"ness o the coating &i applicable' has been established$ it isnow re1uired to calibrate the !nstrument to perorm the Weld !nspection.

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*/

Scan pro!e o,er "/$ mm slot and note the signal amplitudeand phase/

@/

-sing the phase control rotate the signal to ,ertical and ad>ustthe gain to gi,e "$$; FS2 .hen scanning o,er the "/$ mmslot/

/

+arry out inspection o% .eld as per company procedure/

Typical Signal Response %rom Re%erence Standard "/$ mm Slot

Typical Scanning Techniques:

 

9ual Frequency Weld Inspection (Weldcheck)Setup uide otes %or Welding Inspection -sing 9ual Frequency

1ode

Scanning the +ap o% the

Weld

Scanning Toe G 2&H o% the

"$$; FS2 %rom " mmE91 otch

ote: o raticule

alance point

&d,antages o% 9ual Frequency Inspections o,er Single FrequencyInspections The main advantage o using a :ual ;re1uency !nstrument over a Single;re1uency !nstrument is that the coating thic"ness can be monitoredcontinuously during the inspection allowing ad<ustment o instrumentsensitivity or variations in coating thic"nesses. This procedure also onlyre1uires the use o a single WeldScan probe$ thus eliminating the need tointerchange probes or coating thic"ness evaluations and weld inspections.:ual ;re1uency Weld !nspection ,dvantages

• Will reduce inspection time.

• oating thic"ness variations can be observed while inspecting the weld$

permitting inspection sensitivity levels to be ad<usted as re1uired$ensuring inspection 1uality is maintained.

;or ull details o scanning patterns and inspection procedure please reer to#E """: 7$$$ BEddy Current – Examination of Welds by Complex

 The illustrations below show typical scan patterns or the cap o the weld$the toe o the weld and the 2eat ,fected >one &2,>'.

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Parameter

0alue Parameter

0alue

Frequency"

"$$ k23 Frequency 7

"$ k23

Pro!e " ridge Pro!e 7 &!solute

ain " 456 @$d5@$d

ain 7 456 @#d5@#d

Filter "2P58P 9+5#$$23 Filter 72P58P 9+5"$23Input ain

"2igh Input

ain 72igh

STEP T&S  "/ +onnect WeldScan Pro!e to a 9ual Frequency instrument

and s.itch on the instrument/7/ o to main menu and select 1ode ormal 9ual= 0ie.

F":F7 and alance Split/ote: In BSplitC the 8e%t hand alance ey alances F" andRight 2and alance ey alances F7

#/ Set the parameters as a!o,e (guide only)/ &lternati,ely goto BRecall Set -psC in the menu and select BWeldScan 9ualFeC/ ote: Phase= ain and !alance positionsmay requiread>ustment/

*/ To &scertain +oating Thickness place the pro!e a.ay %romE91 slots and edges on the re%erence !ock (no shims) Parto: #"&$$' and !alance/

@/ Position all * plastic shim on re%erence standard and reD

place pro!e on the total stack= noting the ; FS2 o% thesignal/ -sing the gain control ad>ust signal amplitude toappro?imately J@; Full Screen 2eight (FS2)/

/ Remo,e pro!e %rom re%erence !lock and remo,e " shim/Replace pro!e and note ; FS2 o% the signal/

/ Repeat steps %or the remaining shims'/ &%ter ascertaining coating thickness use correct num!er o%

shims and place pro!e on re%erence !lock a.ay %rom E91slots and edges and !alance F" and F7 +hannels/

asic 9ual Frequency Weld Inspection Settings  ote: Frequency " Weld Inspection +hannel/ Frequency 7

F" +hannel F7 +hannel

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J/ Scan pro!e o,er "/$ mm slot and note the signal amplitudeand phase/

"$/ -sing the phase control rotate the signal to ,ertical andad>ust the gain to gi,e "$$; FS2 .hen scanning o,er the"/$ mm slot/ (or as per company procedures/)

""/ Proceed .ith scanning monitoring F" +hannel %or de%ectindications and F7 +hannel %or changes in +oating

Thicknesses/ When coating thickness changes are notedstop inspection and ad>ust gain (Sensiti,ity 8e,els) to suit/

%are ?etal @ * Shims

( Shim A *.0 mm

4 Shims A (.* mm

) Shims A (.0 mm

Shims A 4.* mm

4 Shims B (.* mm

( Shims B *.0 mm

%are ?etal

ote#(. To enable to show screen shot$ the

;( Phase has been rotated by C/@(*8.

4. Probe scanned over (.* mm E:?

D(** ;S2 B %are ?etal

70 ;S2 B ( Shim

5* ;S2 B 4 Shims

+oating Thickness &ssessment

EKects o% +oating Thickness 0ariations on Signal&mplitude

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