ML20151W339

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Rev 4 to UT-AUSTENITIC-A, Automatic Ultrasonic Exam of Similar & Dissimilar Metal Welds in Piping Sys
ML20151W339
Person / Time
Site: Limerick Constellation icon.png
Issue date: 08/28/1987
From: Miller W
GENERAL ELECTRIC CO.
To:
Shared Package
ML20151W267 List:
References
UT-AUSTENITIC-A, NUDOCS 8808240058
Download: ML20151W339 (28)
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Text

SUnJECT AllTO?!ATIC ULTRASONIC EXAMINATION OF SIMILAl 1 NFSD EASTERN AND DISSIMILAR ! FETAL UELDS IN PIPING SYSTE O

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Revision: 4 Date: 8/25/87 s Page: 2 of 28 TABLE OP CONTENTS SECTIO!! DESCRIPTIO!! PACE 1.0 SCOPE 3

2.0 REFERENCES

3 3.0 PERSON!!EL REQUIRE!!ENTS 3 4.0 EQUIP!!ENT 4 5.0 CALIBRATIO!! 6 6.0 EXA!!INATION .13 7.0 PEPORTS 17 8.0 DATA EVALUATION 18 EX111 BITS A - LINEARI3' DATA SilEET 19 B - ULTRATONIC CALIBRATION SNEET 20 C - EXMlINATION DATA Si!EET 21 D - SKEU ANGLES 22 E - SCAN PARM!ETER SIIEET 23 F - WALL TilICKtTESS PROFILE SilEET 24 FIGURE 1 - A DIMENSION 25 FIGURE 2 - EXMtINATION VOLU}tE 26 FIGURE 3 - SCMI INDENIFICAION 27 FI0dRE 4 - U & L DI!!ENSIONS 28 SifPPLE!!ENT 1 - IfLTRASONIC CXA!!INATION OF WELD OVEP, LAY 7,

AlfSIENITIC PIPING

( l SUPPLE!!E!TT 2 - ULTRASONIC EXMtINATION OF DISSIMILAR

!!ETAL WELDS GENER AL M ELECTRIC

, Pro m 4re: UT-AUSTENiTIC-A'

Revision: 4 Dste: 8/25/87

p. 'Page: 3 of 28 O

1.0 scope

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1.1 This procedure defines the methods, equipment, and requirements for auto-

'matic contact ultrasonic examination of austenitic, dissimilar metal, and ferritic welds and base material to s*.ress corrosion cracking (SCC) sensitivity.

This procedure is in accordance with MME Section XI paragraph IWA-2240. l 1.2 This procedure is applicable to full penetration butt welds in ASME Class l' or 2 1 piping systems and safe ends ranging in nominal weld thicknesses from 0.2 to 6.0 inches using straight beam and angle beam techniques.

2.0 REFERENCES

2.1 American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, 1980 Edition with addenda through Winter 1981.

2.1.1 Section V, "Nondustructive Examination",

2.1.2 Section XI, "Rules for Inservice Inspection of Naclear Power Plant Components".

  • 2.2 General Electric Company Procedures 2.2.1 Procedure for Qualification and certification of Nondestructive Examination Personnel, AP-CQUA-277 or equivalent, which meets the requirements of the American Society for Nondestructive Testing

( ASNT) Recommended Practice, SNT-TC-1 A, 1980 Edition.

2.2.2. "trr Evaluation", Procedure For Evaluation of Ultrasonic Examination Data.

. 2.3 Bechtel Procedures i

2.3.1 Bechtel Construction Procedure, CP-W-4, "Procedure for Preservice Inspection of Nuclear Piping Systems".

3.0 PERSONNEL REQUIREMENTS 3.1 Personnel performing scanning, using the manually operated scanner, placing tracks, positioning the automatic scanner, verifying transducer position, etc. need not be certified but shall be trained in the perform-ance of there duties to the satisfaction of the responsible Level III.

This training shall be documented. Documentation shall include a demon-stration of proficiency with the system being used.

o GENER AL M ELECTRIC

si ar :: vi awm. u Ava Revision: 4 Date: 8/25/87 Page: 4 of 28 3.2 Personnel performing system calibration and examination operations shall I be certified to at least Level II ultrasonic testing in accordance with paragraph 2.2.1.

3.3 Personnel evaluating and reviewing the results of UT examinations shall be certified to at least Level II ultrasonic testing in accordance with paragraph 2.2.1.

3.4 Personnel certified in accordance with paragraph 3.2 using one set of '

equipment, i.e., a mechanized scanner and encapsulated immersion type transducers, are considered to be certified in the use of other scanners and types of transducers. Justification for this is that the alternate scanners and transducers have been qualified for detection of IGSCC at the EPRI NDE Center and have proven to yield equivalent data when used with the GE Smart UT System.

L 4.0 EQUIPHENT 4.1 Ultrasonic Instrument 4.1.1 The GE Smart UT data acquisition equipment shall be used. The automated equipment consists primarily of a microprocessor with '

terminal, disc drives, an ultrasonic pulser / receiver with oscilloscope, and automated or semi-automated scanners. ,

4.1.2 A video tape recording system shall be used to record the A-scan.

4.1.3 The ultrasonic instrument shall have its internal alignment verified and certified to manufacturer's specifications at intervals not to exceed 12 months.

4.1.4 The ultrasonic instrument shall contain a calibrated attenuator for amplitude control accurate over its useful range to + 20% or + 2db of I the nominal amplitude, to allow measurement of indications beyond the range of the vertical display on the screen.

4.1.5 The ultrasonic instrument shall provide linear vertical presentation ,

within 5% of the full screen range for at least 80% of the calibrated screen height (base line to maximum calibrated screen point).

4.2 Search Units I l

4.2.1 Ancle Bram I 4.2.1.1 Angle beam examination shall be performed using single element  ;

transmit-receiver or dual element pitch-catch type search units having nominal frequencies from 1.0 MHz to 2.25 MH2.

i GENER AL 8 ELECTRIC

'-----ys,,. a ures va avoic...a tu a

, Revlaion: 4 Date: 8/25/87 ',

.; Pagat 5 of 28 O.

4.2.1.2. For direct contact scanning, the search units maximum dimension  !

should be. 375" round or square for piping under 10 inches in diameter and-should not exceed .500" round or square for larger piping diameters. t 4.2.1.3 The physical size and focal length requirements are waived for encapsulated (booted) search units. For booted search units an angle of 45' + 3' shall be verified on the calibration block. ,

4.2.1.4 For contact scanning, angle beam wedges shall be used that will -

produce a nominal angle of 45' + 3' in the examination medium. .

4.2.1.5 Transducers / Wedges of other sizes, angles, mode of propoga-tion, or frequencies may be used where required by material characteristics, geometric configuration or for the evaluation of indications, with the approval of the cognizant Level III.

! 4.2.2 Straight Beata ( O') ,

4.2.2.1 The transducer should be of a ceramic dual or single element , l type, generating longitudinal waves with a nominal frequency between 1.0 MHz and 5.0 Milz.

4.2.2.2 The transducer size shall be selected to provide good sonic contact.

i L

4.3 couplant ,

4.3.1 USP-grade glycerine, D.I. Water or Ultragel II shall be used for i calibration and examination.  ;

e 4.3.2 Couplants shall be certified for total sulfur and halogen content in  !

accordance with ASnt D-129-64 and D-808-63. The total residual l halogens and sulfur shall not exceed 250 ppm.

4.3.3 Other couplants which meet the above specification may be used i with PECO approval.

4.4 Cables 4.4.1 The UT examination is performed with either a remotely controlled i automatic scanner, or a semiautomatic scanner and the GE Smart UT System. The UT control panels must be placed within 600' of the examination area. 3 O  ;

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i GENER AL $ ELECTRIC i

@ rot.Jare: UT-Ausf6NiLic-A Revision: 4 '

Dates. 8/25/87 i Page 6 of 28 v em  ?

D 4.5 Calibration Blocks 4.5.1 The basic calibration blocks s' hall be made from the same material specifications and of the same nominal diameter and nominal wall i thickness or pipe schedule as the pipe to be examined.  !

l 4.5.1.1 The calibration blocks shall be fabricated f rom one of the '

materials specited for the piping being joined by the weld. '

4.5.1.2 Where the examination is to be performed f rom only one side of

'the joint, the calibration block material shall be of the same specification as the material on that side of the joint.

4 . 5.1. 3 If material of the same specification is act available, material 1 of similar chemical analysis, tensile properties, and metallurgical structure may be used with PECO approval. ,

4.5.2 The finish on the surface of the calibration block shall be ,

I representative of the surface finish of the piping being examined.

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4.6 Contour Cages 4.6.1 Contour Cages shall be used to determine the OD weld contour as

(} specified herein.

5.0 CALIBRATION 5.1 Instrument Linearity Verification 5.1.1 This eslihration ahall include the checkr for screen height, linearity and amplitude control linearity as described below. These checks shall be performed at the the beginning of each period of extended use or every three (3) months, whichever is less. Once established, instrument linearity is verified daily by the system diagnostic checks during system "startup".

5.1.2 Screen Height Linearity: To verify the ability of the ultrasonic instrument to meet the linearity requirement, position the search unit so that echoes can be observed from any two reflectors in a calibration block. Adjust the search unit position to give a 2 to i ratio of amplitudes between the two schoes, with the larger set at 80% of full screen height. Without moving the search unit, adjust sensitivity (attenuation) to successively set the larger echo from 100 to 20% of full screen height in 10% increments (or 2db steps if a fine control is not available), and read the amplitude of the smaller echo at each setting. The reading must be 50% of the larger amplitude within 5% of full screen height. The settings and reading must be estimated to the nearest 1% of full screen.

1 O

GEN ER AL O ELECTRIC

Proc: dura: UT-AUSTENITIC-A

. Revision: 4 Date: 8/25/07

. Page: 7 of 28

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5.1.3 Amplitude Control Linearity: To verify the accuracy of the amplitude control in the ultrasonic instrument, position the search unit so that an echo from one reflector in a calibration block is peaked on the screen. With the increases and decreases in attenuation shown in the following limits. Any convenier? reflector on a calibration block may be used with angle or straight beam search units. The settings and readings must be estimated to the nearest 1% of full screen.

Reflector Set at dB Control Reflector Limits,

% of Full Screen Change  % of Full Screen 80% -

6dB 32 to 48%

80% -

12dB 16 to 24%

40% + 6dB 64 to 96%

20% + 12dB 64 to 96%

5.1.4 Records

All instruments used for examination shall have screen height linearity and control linearity verification recorded on the Linearity Data Record (EXHIBIT A). Daily verifications need not be documented.

7s 5.2 System Calibration

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5.2.1 Calibration shall be performed with the complete ultrasonic examina-tion system for each specified size, thickness range, and material.

The original calibration shall be performed on the basic calibration block. System calibration shall be performed at the beginning of each period of extended use, and confirmed at the conclusion of each period of extended use or every three months whichever is less.

Calibration checks may be performed on either a calibration block simulator or the basic calibration block, but must include a check of the entire examination system. Calibration block simulators shall have their sweep and amplitude responses correlated with the basic calibration block, at the time of initial calibration. A record of initial simulator response and subsequent responses shall be maintained with the applicable calibration data for comparison with the requirements of 5.2.7. The center line of the search units shall be at least 3/4" from the nearest side of the basic calibration block.

5.2.2 Calibration verification s'all be performed at the start and finish of each series of examinations for which the calibration is appli-cable and at least every (12) hours during system operation. Extended periods of system downtime (ie nore than 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />) require that a calibration verification be performed on eitber the basic calibration black, or the calibration block simulator referenced in 5.2.1. Any change ir. the ultasonic instrument settings, search units, couplant, J' )

cables (except as noted below), or any other part of the exanination system shall be cause for a calibration check.

GENER AL h ELECTRIC

yt .tes Ui nLaimustv a Reviatan: 4 Date: 8 /25/87 Pag:: 8 of 28 2

t;0TE: Verification of Cable Attenuation: A short cable may be used during calibra:Lon provided the attenuation difference between the short cable and that used during examination is measured and the calibration sensitivity is adjusted to ace-omodate the attenuation difference. Record at tentuation difference on the Calibration Data Sheet, Exhibit"B".

5.2.3 Calibration shall be pe r f ormed f rom the 0.D. surface of the applic-able basic calibration block.

5.2.4 The basic calibration block and calibration block simulator temperatures recorded during initial calibration shall be within 25'F of the temper-ature of the component being examined.

5.2.5 During calibration verifications, the temperature of the basic calibra-tion block or calibration block simulator shall be recorded on the Cali-bration Data Sheet.

5.2.6 All calibrations and calibration verifications shall be documented on the Calibration Data Sheet.

5.2.7 Calibration Chances I  ;

J 5.2.7.1 If any point of the distance amplitude correction (DAC) curve has decreased 20% or 2dB of its amplitude, all data sheets since the last calibration check shall be marked void. A new calibration shall be made and recorded and the voided examina-tion areas shall be re-examined.

5.2.7.2 If any point on the distance amplitude cortection curve has increased more than 20% or 2dB of its amplitudes, recorded indications taken since the last valid calibration or calibra-tion check shall be re-examined with the correct calibration.

5.2.7.3 If any point on the DAC curve has moved on the sweep line more than 10% of its sweep division reading, correct the sweep range calibration and note the correction in the examination record.

If recordable reflectors are noted on the data sheets, those data sheets shall be voided, a new calibration shall be record-ed, and the voided examination areas shall be re-examined.

5.3 Straight Beam ( O' ) Calibration 5.3.1 During calibration the acoustic velocity must be established using the basic calibration block. The system delay may be established using either the basic calibration block, an IIW block, or equivalent. The system delay shall be established using cable of comparable length and 3

type as that used for examination. The data is to be stored on the

) floppy disk and recorded on the Calibration Data Sheet.

l GENER AL M ELECTRIC

I'n .. Jure: UT-AUSTENITIC-A

, Revision: 4 Date: 8 /25/87

, Page: 9 of 28

-') 5.3.2 Position the search unit on the basic calibration block applicable to the piping veld to be examined. Obtain a signal from the 3/4t hole and adjust it to the desired sweep position. Adjust the peak signal amplitude to a minimun of 75 percent of FSH. This represents primary reference sensitivity for tha O' exanination. Record this data on the floppy disk and the Calibration Data Sheet along with location of the back reflection. If no 3/4t hole is present a 1/2t hole may be used.

5.4 Anale Bean calibration 5.4.1 Sueep/Delav Calibration 5.4.1.1 During calibration the acouscic velocity most be established using the basic calibration block. The system delay may be established using either the basic calibration block, an IIU block, or equivalent. The system delay shall be established using cable of comparable length and type as that used for examination. The data is to be stored on the floppy disk and recorded on the Calibration Data Sheet.

5.4.1.2 Obtain the angle beam path required in Paragraph 6.3.3 on the sweep display. Variables such as weld preparation, weld crown width, or physical interference may preclude obtaining caverage of the examination volume with a 1/2 V examination f rom two sides as shown in Figure 2. If these variables are such that dimension A of Figure

<'~x 1 is greater than:

)

.93t for 0 - 45' i.19t for # = 52' l.60t forB = 60*

2. 5 0t for # = 70 The beam path shall be increased by at least 1/2 V path or the interference may be eliminated by one or more of the following:
1) reducing the dimension of the wedge edge to beam entry point;
2) reducing search unit size;
3) increasing the bean angle;
4) conditioning the veld surface.

5.4.1.3 The gate shall be adjusted such that indications in the required examination volune will be recorded.

5.4.2 1/2 V Path Calibration (unrestricted access) 5.4.2.? When piping configuratinn permits 1/2 V examination f rom both sides of the weld, position the search unit on the applicable basic calibration block and obtain the peaked signal uplitude 7s f rom the ID notch. Adjust the signal amplitude f rom toe ID notch

(

) to approximately 80% FSil. This esrah11shes primary reference sensitivity for 1/2 V examinations. Record the attenuation setting and depth reading on the Calibra t ion Data Sheet .

GENER Alh ELECTRIC

proc:durst hT-AUSTENITIC-2

, Revision: 4 Dato: 8/25/87

, Page: 10 of 28 J NOTE: Depending on joint configuration, Primary Reference Sensitivity uay require an adjustment to provide accurtic equivalency. See Paragraph 5.6 for the A.E.

requirements on welds without access restrictions.

5.5 Full V Path Calibration (When Access is Restricte,i to One Side Only) 5.5.1 Uhen examining welds where access is restricted to scanning f rom one side of the weld, the following calibration technique shall be used.

5.5.2 Position the search unit on the basic calibration block, and obtain a peaked signal amplitude from the applicable ID Notch. Set the response to 80% FSH.

Record the attenuation setting nnd depth reading on the Calibratien Dato Sheet.

5.5.3 Position the search unit on the ba,': calibration block, and obtain a peaked signal amplitude from the applicable OD Notch. Set the response to 80% FSH.

Record the attenuation setting and depth reading on the Calibration Data Sheet. This shall establish primary reference sensitivity, when adjusted to provide

  • acoustic equivalency per 5.7.
  • U; in an acoustic equivalency determination can not he performed due to OD Cc. figuration, nonparallel surfaces, etc., calibration shall be perfotmed per 5.5.2 and 5.5.3 except that primary reference sensitivity is established by increasing the gain determined in paragraph 5.5.3 by 6 dBs (2X). Scanning p_ and recording sensitivity shall be per paragraph 6.3.2.2.

i i k-j$g 5.5.4 Calibration for supplenental exanination (Restricted access).

5.5.4.1 When required by the cognizant Level III, full V path examinations may be supplemented with a refracted longitudinal wave scan when the weld being examined can only be examined f rom one side. Calibration for the supple-mental exanination shall be performed as follows.

1) Position the search unit on the applicable basic calibration block.

Obtain a peaked signal amplitude from the ID notch. Set the response to 80% PSH. The gates shall be set to record a ninimum of 1 1/2t.

2) Record the attenuation setting and depth readings on the Calibration Data Sheet.
3) Scanning gain and recording level shall be in accordance with paragraph 6.3.2.2.

5.6 Acoustic Equvaiency Determination A.E. (For unrestricted access) 5.6.1 For the fitting side of welds between pipe and fittings, with unrestricted scanning access to both sides of the weld, the primary reference sensitivity established in paragraph 5.4.2 shall be edjusted as necessary to obtain

("S acoustic equivalency. Acoustic equivalency may be established for any exanin-

\j-ation volume as an aid to data evaluation if deemed necessary by the Level III responsible for the exanination.

GEN ER AL h ELECTRIC

Pro, ,a UT-AUSTENiTIC-A[

Revt31on: 4- i Date 8/25/87 Page .11 of 28 5.6.2 The following steps shall be performed to determine the gain adjustment (if any) necessary to establish equivalency (A.E.) in examination sensitivity between the fitting base material examined and the basic calibration block. These steps may be performed with any equipment capable of through transmission operation.

1) Adjust the screen to display a minimum of a full V path.
2) Position the search units in the
  • axial direction on the OD surface of the calibration block and maximize the full V return signal.
3) Adjust the sensitivity controls to produce a return signa 1' amplitude of 80% FSll.
4) Record this sensitivity on the Calibration Data Sheet.
5) Using the same equipment, position the search units in the
  • axial direction on the OD surface and project the sound beam through the base material of the fitting.
6) Using the sensitivity recorded in step 4 above, maximize the return signal af ter a full V through the fitting. -
7) If the amplitude of tha return signal is not 80% FSil, change the sensitivity to bring the signal amplitude to 80% FSH. Note the sensitivity adjustment.
8) Perform steps 5-7 in three locations approximately 120' apart, on the fitting side of the weld being examined.
9) Determine the average dB change for the fitting side of the weld.

Primary reference sensitivity may then be adjusted, provided the adjustment does not exceed 4 dB's. If the adjustment exceeds 4dB's or can not be deterr.ined due to configuration (i.e. nonparallel surfaces).

Notify the G.E. Level III prior to performing the examination.

10) Note the adjusted pt ' mary reference sensitivity (A.E.) on the Examin-ation Data Sheet. When no adjustment is necessary, enter OdB on the data sheet.
11) The adjusted primary reference sensitivity shall be used during the recording of indications.
  • Circumferential direction may be used upon approval from the cognizant Levs1 III.

O GEN ER AL M ELECTRIC

i

@ro w arut UT-AUSTEN1f1G-A

Revisiont 4 Dste 8/25/87 Paget 12 of 28 O

5.7 Acoustic Equivalency Determination (For Restricted Access) 5.7.1 For welds that are restricted to scanning from one side only, the primary reference sensitivity established in 5.5 shat?. be adjusted as necessary to obtain acoustic equivalency.

5.7.2 The following steps shall be performed to determine the gain tidjustment (if any) necessary to establich equivalency in primary reference sensitivity _

between the welds examined and the basic calibration block for restricted examination. These steps may be preformed with any equipment capable of through transmission operation.

1) Adjust the screen to display a minimum of a full V path.
2) Position the search units in the axial direction on the OD surface of the calibration block and maximize the full V return signal.
3) Adjust the sensitivity controls to produce a return signal amplitude of 80% FSil.
4) Record this sensitivity on the Calibration Data Sheet.
5) Using the same equipment, position the search units on the OD surface and pro ject the sound beam toward the restricted side through the weld being examined.
6) Using the sensitivity recorded in step 4 above, maximize the return signal after a full V through the weld.
7) If the amplitude of the return signal is not 80% FSil, change the sensitivity to bring the signal amplitude to 80% F!!!. Note the sensitivity adjustment.
8) Perform steps 5-7 in three locations approximately 120' apart, through the weld being examined.
9) Determine the average dB change for the weld. Primary reference sensitivity may then be adjusted, provids.' the adjustment does not exceed 6 dB's. If the adjustment exceeds 6 dB's e cann-t be determined due to l configuration (i.e. Nonparallel surfaces) no'ify the CE 1.evel III prior I to performing the examination.

I l 10) Note the adjusted primary reference sensitivity (A.E.) on the Examination i Data Sheet. When no adjustment is necessary, enter 0 dB on the data j sheet.

l 11) The adjusted primary reference sensitivity shall be used for the

{ recording of indications f rom the veld centerline to the edge of the examination volume on the restricted side.

I 4

GENER AL 8 ELECTRIC

q- -W .

Proceduro:.UT-AMSTENITIC-Al

-. 4 Rsvision: 4 Dsto 8/25/87

'.- Pcge: 13 of 23 [

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  • 6.0 . EX Att,I tiAT t 0 N 6.1 forface Conditions i

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.6.1.1 The examination surface shall be free of irregularities, loose N' material, or coatings which interfere with ultrasonic transmission . ,

6.1.2 Where weld crowns exhibit rough, wide and high reinforcement which impair ultrasonic examination of the weld heat af fected zone for axial cracks, grinding or machining of the veld crown is desirable. Grinding 3- or_ machining requirements shall be reported to PECO for disposition.

6.1.3 Surface preparation, cleaning, and marking of the reference system .

are not within the scope of this procedure. '

6.2 Examination Volume 6.2.1 circumferential Welds 6.2.1.1 the minimum required examination volume shall 'oe the

  • inner 1/3 of the weld and basn material (*1/3t) extended to a 5

vertical line drswn 1/4" From the fusion line at each toe of -

the weld (Figure 2). Wherever feasible, the examination for  ;

hl ) - Class 1 welds should be t.xpanded to include essentially the full wail thicknesa extended to a vertical line drawn 1/2" from the fusion line at each toe of the weld. t i

6,2 7 Lougitudinal Wolds y 6.2.2.1  !.ongitudinal welds shall be examined as required for a mininum  !

of 1 foot for Class 1 or 21/2t for Class 2 as measured from the intersecting circumferential weld. The minimum required (

!. examination volume shall be the

  • inner 1/3 of the weld and base  !

material (*1/3t) extended to a vertical line drawn 1/4" frca the fu!st.on line at each toe of the weld (Figure 2). Wherever feasible, the examination for Class 1 welds should be expanded to include essentially the full wall thickness extended to 1/2" from the fusion line at each toe of the weld. '

  • Note: For Class 1 and Class 2 welds included in the "No Break"

's . boundreig ( shown as Code Category + in Specification

  • P-505 ) the examination volume shall be increased to t.

/;.2.3.1 Examination restrictions or limitations shall be noted on the Examination Data Sheet.

60 Scanning 1 g~ 6.3.1 Scans to be Perf,ormed 6.3.1.1 A straight beam (O') examination shall be performed to detect i

, conditions that could interfere with the required angle beam  ;

examinations. i GENER AL O ELECTRIC [

Procadore: UT-AUSTENITIC-A Revision: 4 5

Date: 8 /25/87.

g .- Page: 14 of 28 V

6.3.1.2 Angle beam examination for detection of indications both parallel and transverse to the weld shall be performed.

6.3.1.3 The scans shall be identified as shown in Figure 3.

6.3.2 Angle Beam Scanning Sensitivity / Speed / Grid 6.3.2.1 The scanning sensitivity should be at least *14dB above the primary reference sensitivity. Scans may be performed at levels lower than 14dB above reference sensitivity whea noise level requires an increase in attentuation. It is intended that the inside surface noise level during both 1/2 V and Full V scanning be an average of 5% FSH. Scanning sensitivity must be no less than 2X reFar' teasitivity. The scanning sensitivity used shall be dc . on the Examination Data Sheet (s).

-Jhe above scanning sensitivity may not be adequate in some highly attenuative materials. In these situations the attenuation shall be adjusted so the average baseline noise is an average 5% FSH.

  • 6.3.2.2 Where accoustic equivalency cannot be determined or when examining welds with access restricted to scanning form one side, a supplemental

/~T scan may be required in addition to the full V examination. The k/ examination, if performed, shall be performed as fo'. lows.

1) Instrument gain shall be increased until either a 5%-10% FSH ID noise level is achieved or until front surface noise begins to obscure the inner 1/2r of wall thichness *, whichever comes first. {
2) The Volume shall be scanned at the sensitivity established above.
3) All indications with a signal amplitude of 5% to 10% FSH above ID noise level shall be recorded.
4) The instrumenc attenuation used during scanning shall be recorded on the appropriate calibration and examination sheets.

6.3.2.3 The scanning speed during examinatjen shall not exceed 3" per second.

6.3.2.4 Scanning shall be performed so that the minimum scan overlap is at least 50% of the transducer transmitting piezoelectric element.

  • Excep?. for welds in the "No Break" boundaries GENER AL $ ELECTRIC

r%. .ar e t "61-A65 0:,td d6-A Revision: 4

.-V- -Date: 8 /25/87 Page: 15 of 28 6.3.3 Anglo-Baam Scan 6.3.3.1 To detect discontinuities which are essentially parallel to the weld the search unit shall be placed on the contact b(3 surface with the beam directed at about 90* to the weld and manipulated laterally and inngitudinally with a minimum of 10' osei11ation so that the sound beam passes through the complete w examination volume. The examination shall be performed f rom-both sides af the weld (1/2 V) where possible or from one side s of the weld as a minimum with a beam path long enough to examine the required ulume in 2 beam directions.

6.3.3.2 To detect discontinuities which are essentially transverse to the weld,the skew angles for various pipe wall thicknesees are a9 shown on Exhibit D. The examination shall be performed on the required volume (Figure 2) with _1/2 V scanning in 2 directions -

where ccaf-guration permits. Other skew angles may be used if, in the opinion of the Level III, more meaningful data can be obta9md.

The skew angles used shall be recorded on thJ Scan Parameter Sheet (Exhibit C).

g 6.3.3.3 For velds where access is restricted to scanning from one side only, an additional skew angle of approximatly 45'+ 10* shall be used.

This shall be used to aid in the detection of discontinuities which are eccentially parallel to the weld and discontinuities which are, essentially tranaverse to the weld, and to detect discontinuities which are oriented at angles other than transverse or parallel to the weld.

G Q 6.3.4 Straight Beam (0*) Scanning Sensitivity / Speed / Grid 6.3.4.1 0* scanning sensitivity should be at least 2X primary refer-

)-

ence sensitivity. In thin material ( ~ .700) it may not be possible to scan at 2X due to front surface noise obscuring the near portion of the pipe wall. In such cases, sensitivity may be re6 iced to assure coverage of the maximum portion of the pipe wall. In no case shall scanning be performed at less than reference sensitivity. The sensitivity used shall be recorded on the Examination Data Sheet (s).

6.3.4.2 The scanning speed during examination shall not exceed 3 inches per second.

6.3.4.3 The (:anning grid size used shall provide a minimum overlap of 50% cf the transmitting piezoniectric element.

6.3.5 Siraight Beam (0*) Scanning I

6.3.5.1 The 0* examination shall be performed on both tht weld and re-quired volume (Figure 2) and the base material through which the angle beams must pass.

6.4 Investigation of 'ndications 6.4.1 If,during the examinations the level II (Operator) believer. that indications are caused by cracks, lacks of fusion, or lacks of penetration, they shall be noted on the Examinatioa Data Sheet (s) regardless of amplitude.

GEN ER Al @ ELECTRIC

F. aure: O f-Au s i u.11 tL-A Revtaion: 4 Date: 8/05/87 Page: 16 of 28

)

6.5 OD Weld Contour 6.5.1 Contour gages shall be used to establish the OD weld contour in 4 approximately equally spaced locations around the weld. In addition, the OD contour shall be taken at the location of each indication recorded during the scans referenced in 6.3.3.1 and 6.3.3.2.

U.e contour of the weld shall be traced as follows:

At the position of maximum amplitude along each indication, the general OD contour of the weld and component surface shall be profiled by applying a pin gage to the weld and/or component surface.

The pin gage contour measurement shall be continuous along the area to be profiled. The OD profile shall cover the weld and suf ficient base metal to extend 1 inch beyond the search unit position, where possible. Outside diameter profiles shall be conducted by placing the pin gage on the OD surface of the weld and adjacent component material and applying pressure to obtain a contour. One tooth of the pin gage shall be raised when profiling to identify the weld centerline. Af ter forming the contour and establishing the elevated gage tooth reference, this cection of the OD contour shall be traced from the pin gage an' the process repeated until the area has been co.npletely profiled.

x-6.6 Angio Beam Indications 6.6.1 During the high gain baseline examinations, all angle beam indications in the examination volume in excess of 15% FSH above the average noise level shall be recorded on the floppy disk. Indications observed on the CRT, which emanate at the root (ID surface) and travel along the sweep toward the OD shall be investigatea regard 1 css of amplitude. If in the opinion of the Examine, a signal may mask the recording of others, the scan shall be completed. The gate may then he moved to cover the area of interest and the suspect crea rescanned.

6.6.2 Indications of suspected flaws detected curing the high gain scan in 6.6.1 that produce an amplitude of 100% FSH or greater, shall be rescanned at pri ary reference sensitivity. During this rescan indications shall be recor'ed at 15% F SH.

6.7 S* zht Beam (0*) Indications l 6.7.1 '

on the examination data sheet all areas which exhibit a total i ,ack reflection. If numerous ove-lapping indicaticns of lesser

...npitcudes exist which, in the opinion of the Examiner, might prevent a meaningful angle beam examination they shall be documented.

V GEN ER AL h ELECTRIC

Pro ;ure: IIT-AUSTENITIC-A

.. Revision: -4 Date: .8/25/87-

, Page: 17 of 28 y

(/

7.0 REPORTS 7.1 The format of exhibits are subject to change as may be requ'.eti. The technical content of ' forms used shall contain as a ~ minimum that shown on the exhibit.

7.2. Calibration data shall be entered on the Calbration Data Sheet prior to performing examinations.

7.3 Calbration Data Sheet: The system calibration informatica shall be recorded on the Calibration Pata Sheet / Calibration Disk, and shall include as a minimum, the followtng information:

a) Calibration Data Sheet number b) Date of calibration c). Examiner's name and ASNT Level d) Ultrasonic instrument model number c) tiltrasonic instrument serial number

() Ultrasonic instrument settings g) Transducer size, beam angle, and frequency h) Transducer serial number

1) Search unit - cable type and length to the nearest foot j) Couplant

'( ) k) Examination procedure number and revision

1) Calibration block number m) Times of initial calibration and subsequent times for calibration checks.

n) Last Examination Data Sheet (EDS) Number used, if applicabla o) Calibration reficctor p) Orientation of calibration reflector q) Mode of propogation r) Amplitudes and sweep readings obtained from the calibration reflectors.

e) Special search units, wedges, shoes, or saddles, if used.

t) Thermometer SN and calibration block temperature.

O GENER AL O ELECTRIC

C

  • Procadure: trT-AUSTENITT@
  • Revision: 4 Date: 8/25/87 Page: 18 of 28 t

7.4 Examination Data Examinations shall.be recorded on Examination Data Sheet (s) and Examination Data Disk (s). Examination data shall. include as'a minimum the following information:

(a) Exar.ination Data Sheet number (b) Date of examination-(c) Examination procedure and revision (d) Applicable Calibration Data Sheet number (e) Examiner's name and ASNT Level (f) Data taker's name and ASNT Level (if applicable)

(g) Exam / Component identification number, volume scanned, temperatui , and thermometer cerial number.

(h) Record of indications or volume free of indications.

(i) Surf ace f rom which the examination was performed.

(j) Time period of examinations (k) Weld identification (1) Position and location of search unit 7.5 All reflectors which exceed 15% FSH above the average noise level shall be recorded on the floppy disk and noted on the Examination Data Sheet.

7.6 "Xo" is the point from which "X" measurements begin.

b) s. 7.7 "Yo" is the point from which "Y" measurements begin.

7.8 All "X" and "Y" dimensions shall he measured to the nearest .05".

7.9 "X" . "Y" neasurements shall be established (ie +X,-X & +Y,-Y) to allow correct presentation of data on the floppy disk and the image grid. These measurements are used to calculate "W" &_"L" dimensions (Figure 4) if necessary.

8.0 Data Evaluation 8.1 Ultrasonic data shall be evaluated in accordance with GE procedure "UT-Evaluation.

8.2 Evaluated data shall reviewed by a GE Level III and forwarded in accordaned with contract and QA Manual requirements, for final disposition.

GENER AL $ ELECTRIC r

P rocxdu';e : UT-AUSTENITIC-A

. Revision: 4 Date: 8 /25/87 e Page: 19 of 28 insTRumen r uNEARITY DATA RECORD G E N E R Al IM E LE CTRIC Cbent . _ _ _ . - - - - - - -

S"81 U" S: t o D .i te f.Ug. & h*Mel:

SCREEf4 tlElGitT LINEN 11TY SCn EE fJ lt ElGili LINE AnlT Y

% FSil SMALLER SIGi1 AL*  % FSli SMALLER SIGN AL*

% F514 LAnGER SIGNAL

% rses LAnGEn SIGNAL ACTUAL i LIMtf$ ACTUAL L 'i=s 45 55

'00 45 55 100 40 50 00 4050 00 00 3545 60 3545 30 40 20 3' 40 -

J 70 25-35 00 25 35 CO

.'O 30 CO 20-30 50 15 25 40 1G 25 40 10 29 30 t o 20 30 5 15 20 5 15 20

  • The Srnanee Sys el must be 50% of the Lareat 5.gnal ordhin
  • T he 5.nnuee 5 guss erust be 53% of iM Lee ser 54nsi i=sth6<t GY. of F Sin. CV. of f Sil.

AMPLitVDE COfJ THOL LINE AfilT Y AMPLITUDE CON T ROL LIN1! AlllT Y

*U' ^ '" CDCONTROL INDICATION AT FSl4 t raOIC A T ION DOCONTnOL INDICATIO*! AT FSil SET AT% OF E E T A T *6 O f' CHANGE CHANGE' LIMITS FULLSCMEEN ACTUAL LIMITS FULL SCnf EN ACTUAL 3249 80% 0OD 3240 C0% -GDS ,

10 34 09% -1200 'G 34 .

00% - 12 D u C 10G 40% + 0 C0 G100 d

4 T. +600 C1 OG 20% e 12 00 G4 BC

-- 204 + 12 0 0

  • M.nwa de setes decrease l't serphtude plus des-sies emeesso
  • P.t.ni.s tie >*etes desrease in amplitude pius denvies imrease in semplitude irl armisl.lude ilonlZONTAL LINEAlitTY llOr.f ZONTAL LINE ARITY WITitltJ LIMITS '.*/ITillN LIMITS O YES O NO O YES O NO EQUlPMENT D ATA i:On LINE AlllTY CllECKS EQUltt.1ENT DAT A FOR LifJE AnlTY CllECKS Clocit identificat:on:_ Olock identil. cation:

Transcucer L ira: risositucer Data:

Ger:al tJo.: Sae: Serial No.: She:

Ocarn Ang:e: Freq.: Uc m Anfe: Fi cit.:

Cablo No.: Shoc No.: Cable No.:

Chui N o.:

Pc, f oi meil Ly: Per f ormed by:

Date: Leeci: Da'c:

Level:

hev'cacd by:

Review ed liy:

Level: Date:

Level: , Date: ,

v EXHIBIT A - LINEARITY DATA SilEET fi E N E R A L M E l.E CT R I C

Procedure: UT-AUST3NITIC-A

, Revision: 4 Date: S/25/87'

,; Page: 20 of 28 m

IvY- GENER AL ELEC TRIC "SM ART UT" SYSTEM G E N E fl A L J) E L E C T A I C CAUDRATION DATA SHEET rnOJL C T: C"' * "" 8 3"" 8 N

O.it.i Ci ce so) 1.imerick Unit 112 l'SI ProccJos e x.j,,c,, em S/4 Cet B k.No.

too.

S.re fati It'rio of Escentialwri O'#-

Wy<tje tw, D'W.2 Angle Coutil ant IDIlf 488"C86I IJ! ira isn3llaf lil f'sfi f., r,te /t en.pth _ _ . _ . , , . , _ _ _ _ _ Ieri t) .I S /II DAC #"'5"' S'U 1(30 licc0iver S/f4 Guo S/tt 93 00 Cal.le Auenoair o 3

M 70 - - -- - - - -

P CAtton ATION VElliflCATION

- ~~

L 00 thio 1.nie inasal re.nri 6r com.nene s I sg -

~~

- - - - In. sial

u. _ _ _ _ _ _ _ n,e-p vovilaat .n g 30 - - - ---

vee.t.c.ision yo _ _ _. _ _ _ _ _ verific.inson 10 - - - - - - - - - -

veril.cEa7 y,,,,,y,,,,,,

_- vciecai.nn

  • 0 1 2 3 4 5 6 7 0 9 to vens, canon SWEEP /DEPTil GrTui.on SCALE HANGE: 010 = _" ['"'"

Finfel Simulator 1 0 _

"/ SDil NEAH TAR Groisp"C"

~CAllDUATION DATA M.w Amp Depth M.nemi

2. Vel Cusistant 3 Threstnk! .

Group "A"

<l. floin. The. koc s ADMINISinAllVE DATA ~~ 5. Cal m.k 1hn.kness G Mus innn Depth I P'D iect 7 M.u. Insp. Depth

2. lask
3. Scan Group "D" 4 TranMicer UT EQUIPMENT SET 7INGS J Col Ukk Tpy,3,3,np g 2 Pul:;o Danspisso Group "B" 3 Pulso m ieti pCANNER SET UP & ri%uMus 5 funcivu
1. Grid Spacing G RF/ Video
  • Trk.F.wtor

. 7 Atienuatbi

3. Asni Factor 0 Hosolution
4. Scanning Aais 3 Gaio Delay
5. X Dui.cr. Anglo 'O Gate Wwhh G. Dela fTwne _ 11. Pul>v naio Eiananed tv li.mtmi t, u nev, ewe.i t.r O Approsed ly LeW _ _ Dase ---- -----

N"'"k'l l lewt Date Oase t .sei _ . . _ . _ _ _ _ . _ _ _ _ _ (1 St)PPtrMEP.'TAL DATA AT T ACHED Page of

\

J EXHIBIT B - ULTRASONIC CALIBRATION SHEET GENER AL h ELECTRIC

Procedure: UT-AUSTENITIC-A

  • - Revision: 4 Date: 8 /25/87 Page: 21 of 28 p .

. AUTOMATIC succfr.o.

, GENERAL 4)g E L E CTIlI C ULTR ASONIC EXAP.UN ADON DATA SilEET t

omtclion or ~v srAP.1P Pn0 JECT. l"nerick Unit 112 PSl_ _

" ~

(P.(AGE CntO SYSTEf.1 WELD DIA: CIHC -

l WELD 1 D. ._ ,,

t

,(

Cal. Sheet flo. O ti r.ecesuce Rov, U '"S'" " "

Proceduro flo.  : -

SCAN: O AXIAL n" CinC gi 7/v TAf1GEllilAL D OTHER 0 ** I = 2 = 3 m 4 '. S = 6 m f a u ** 9 'sA so AAm ti m 12 m 13 u 14 '.10 = 1.m l, = 10 's 19 '* 20m 21'*a 22 = 23 m 24'e 25

  • ' .'. F WELO * -

(I.

sy 25 4 26 = 2 7 = 20 '* 294 30'e 31 m 32 m 35 m 34'o 35 m % m 31 ** 30 u 39m 40 m 4 se 42'.4 3 m 44's 45

  • 40
  • 4 F m 40 m 49 m $u

+

  • A 4- + +A+

. I I I I (I VJCLD i* J a ,, ,1 *

, . e .. ,

a s. .

.,,..,,......,...,,..,m,,......,,mm.,M.,...,..4.,...w<,m..m....em,,..,,,,,..,4..,,

O ,

FT rn'FrrTTTTTTT 'l WELD- '

(

> , 'o. /.

~

75 m T6 9 77 '* T8 '* 73

  • t3 'e 019 02 4 03 m 04 4 0S u cG m0f u 05 4 09 '* 90 m 9a m 92 '*93 m 9 4 m 33'* 96 u SF m 96 m 29 'e g)o

. .. .' _'t; ,,

g {(g # "'t ' I/e !'

p 6 .I , ,,g s ') ., ,

.s s

  • W1.0.4Ltd l P.t.Y. t. f aO H(f 8DIt.AInt E Vd' sit %l8(41$ 4 URfifLR DOseg G[f y,t()Hy ) tah%f s)t3 Qf 0WhNG T'L#tlitL68 2 fiOte ACL LVA'il ddAf'/.lflF4 S WASU(; Sts6L At-((Mtpaletf (VALUAllOtt 3 HOOF GCOMTllIY 6 FAJN GECt.4t titW" t.tFCAf1Off 6 OllILR

' " ,,, W,ff " 0','".,-

'i *. ,,, ' :M ' ' " " " ' ' " '55 5 '- r ~ '.

, _ _ . s. u :

~~

S Cumisaw 3

4

_- fleu:ti tw REMAl1KS.

t w. v.t tu tg m 'nw e n u u' i t vtl u ntuu.+ u o r tumni.ru ur

- -. . .-._..DA?f - . - - . . . -._ . - _ . D % f f . . . . _ . DA f f - - .. ..

r* Ant or _ ,,__.

O EXHIBIT C- EXAllINATION DATA SilEET GEN ER AL h ELECTRIC

ffToco .;; Uf-AUSf6NLf1G-A, Revision: 4 Dato: 8/25/87

  • Paga: 22 of 28
1. FOR liCHIfiAL WALL TillCKriESSES )1.0" 6 JO 4 4.o'

. Al n1 .

1 AO l

l .

4 L'_. - - _ c Cl O

-SKEW ANGLE OF 40*; 111tilliUM OSCILLATION AtlGLE OF 10' !!i CLOCKWISE Aft 0 COUtiTERCLOCKUISE DIRECTI0flS.

![. FOR fl0MIftAL WALL TilfCKitESSES ( 1" to .8" O'

) 60 I ,. 60:

y 70 L _r 90 1 SKEW All3LE OF 60*; MIftlMUft OSCILLATIO!l AfiGLE OF 10' Ill CLOCKWISE All0 COUiTERCLOCKWISE O! RECT 10ftS.

Ill, FOR fl0MillAL WALL Tit!CKilESSES < .8"

. O'

. 4 .

70

' e

> 9O SKEW AfiGLE OF 80*; MilllMUll OSCILLATIOft AfiGLE OF 10' IN CLOCKWISE Afl0 COUfiTERCLOCKWISE DIRECTIONS.

L.)

EXilIBIT D SKEU ANGLES GENER AL h ELECTRIC

I Procedura: Ur-AUSTENITIC-A Revision: 4-Date: 8/25/87

, Page: 23 of 28 O

SCAN PARAME FER SHEET SHEET NO.

G E ll E R A l. ELECTRIC FOR SMAni Ui SYSTEM PROJLCT: ' "'"* *'"d # 7 S' WELD O!A CillCUM.

SYSTEfA TilACK LOCATIOfJ.

WELD i D.: Xo LOCATIOff.

WELD COfiTIG ; Yo LOCAllori:

  1. LOW m.

CIRC - 1"= COUld S ROTATOR ZERVED Willl DEAM DiREC1ED:

COMMEtJIS-ofic io nrm INA to Uff.1 Hol Cr.WO HPM gggg OP$ l tt E M.1. N'GLE O~. 10~

s n

  • _ p rr*

10~_. p 10-._ 40~

AO~- W W _ rO' rn~ ., 7c yry _ nn *

{1r)

  • _ tw I'*

WW) trWp' SAEW DOWNS 1HEAM NJGLE 0% to-

, 10*- 70' 2n % yr laI % 4:)~ .

q, ao u r._ n , -

so-(,0 % It) '

70 % W)

twY ._1ri) -

f'lllC IN) III'f A lilA FY) 16PM lit li (",F(W) I t!'M Sm*/

  • V* S T AfAP Af4GLE l 0 in-10
  • _, pay-po'. ?n
  • 3n% Am

, _43% W g r,n% rn-6n% ?n'*

73% W g-, _ g..

rk) % i r a)

  • 9 AGAttd$ T SKEW v* STAMP AP,0.( E 0% in*

10 % ?n~ ,

, 20._ m.

l 39 % 40~

l

, An% r ay '

' res % py-rn". yo '

70 % n0*

q.y. _ y..

rvi ._ ine OMitAfort D AI E. I'A GE OF EXHIBIT E - SCAN PARAMETER SHEET GEN ER AL h ELECTRIC

Prodfura: UT-AUSTENITIC-A

  • Revision: 4 Date: 8/25/87

,' Page: 24 of 28

/

SHEET NO.

k GENER AL @ ELECTRIC WALL THICKNESS PROFILE SHEET PROJECT:

SYSTEM WELO NO:

Limerick Unit 1/2 PSI.

UT Exornination Data Sheet No.

Recore Thickness Measuresncnt As Wcld "Weld Edge Indica? s, including Weld Width, Cenierline Edge fo. Edge At 0.* 2.5" r 2.5" i a-

  • covuon o* w t00' no* Q &h@ [

m ) J

@ Side Side G- s g ,

I - -

x )

g l FLOW CROWN HEIGHT: DIAf.1E TER:

CROWN WlOTH. WELD LENGTH:

MINIMUM DETECTED THICKNESS X, Y LOCATION

).....-..

_ j, g .,. . . ..

..t. i 1 1 (

g

[] .

f l !f I ' ,! !

v - - - - --

o H,i! -

!l I. !! 4u. . g, d.. .:

m, , ,:

ii t. .

.h .g ]. ff  ; l . .: .

du o

a;-  : .

I:

m -

t di ui -

r e.,r]:

j3 ,

1

,o it i >i .

-l - -

j

~~ ~

' :f l, ,.

'l l ..l. . ...

-9. - . .

.lc. ... .. .

l Lg_ .- . .=

I!
t

~

I' * -

i i. i.

] .

! r ( , ... .

.L

_ .  ; - ' .p:

l I  ;-

l  :

j

~.'.

^

' j -

!l i .

.u.l..1

_._...._._L. , . . . _ . I. .L. .._

exam.a o o... onm ov. caemam -noe 3Arg 34T3 OATE PAGE OF EXHIBIT F - WALL THICKNESS PROFILE SHEET O.

GEN ER AL @ ELECTRIC

. -. ..-- . . . . . . . . . . - .. -. . . - . .. - . ~ - . . - - - . . . . . . . . . , . .

Procedure: UT -AUSTENITIC-A .

4 l'

-Revision: 4

(' ' Date: 8/25/87 11 ..

Page: 25 of 28

} :.

r

! O-i.

l i

4 1

).

1 4- A --*-

i .

I 1

(

4

O Q'esc m N

E. P. {

\

l t s: h!.?. I

,- I (

U f "A" DUfENSION FIGURE 1 GEN ER AL O ELECTRIC

  • - Procedura: UT-AUSTENITIC-A

- ' E .* ~ Revision: 4-

Date: 8 /25/87

.Page: 26;of 28 s

r) -

1.25" 0.5" -

(

t H

, g .g s .s s.s N. s s s s v N '

\ N \\ NN \\ \ .N \ N

\g g\ \ \ N N N \

\N NN\ \ \

\\

\\

N,

\ \\g s\ N NNNN N yN

\

.- \

\g g \ \ N \ N N. g'N

,T g\ - g N\\ N N-N \ g\

  • s\\ N \ N. ' .\ N N N N

'O v N b /

// o /

.,i v3T -

- CODE EXhblit!ATTON N 4

/

VOLUME

, CONTRACT EXAMINATION g s

NOLUME EXAMINATION VOLUME FIGURE 2 GENER At h ELECTRIC

Proc dure: UT-AUSTENIf1C-A Rnvision: 4 g

e' Date: 8/25/87

" Page: 27 of 28 2 5 0'0f t 1

! l "V" Stamp 4 3 0 0*h74 Circumferentiai Weld

, s

/ '4 9

U

.l  :  : h 10

/

FLOW 6 0 'l.11 50'0:1

  • Longitudinal Welu y 4!

Scan il Ocam directed downstroa:n and perpe"dicular to the weld (W/F)

Scan #2 Ucam directed upstream and perpendicular to the weld ( A/F)

Scan #3 Ocn directed parallel to the v. eld in the dtrcction of the "Y"stamp (W/l)

Scan #4 Ocam directed parallel to the wold against the direction of the "V"stamp ( A/V)

Scan 15 0' examination of the Dase Material through which angle beams must pass (011)

Scan f6 0' examination of the Wold and Required Volume (let)

Scan #l Beam directed perpendicular to the weld in the direction of the "V"stamp (W/l)

Scan #8 Ocam directed perpendicular to the wcld against the direction of the "V"stamp ( A/V)

Scan #3 Deam directed downstream and parallcl to the wcld (W/F)

Scan fl0 Deam directed upstrou and parallel to the wcld ( A/F)

SCAN IDENTIFICATION FIGURE 3

%s GEN ER Alh ELECTRIC

F. m Procedure: UT-AUSTENITIC-A e' Revision: 4

  • - Date: 8/25/87 Page: 28 of 28

,,-)

(V) $ TAMP TOP DEAD CENTER = Lo FOR CIRCUMFERENTIAL WELDS W2 WM WI L2 L1 [

i .

[ .

(

"s e a I e l

e=

I L g 2@ O" G er ,

=~ --

\ . - -

WoFOR LONG. WELD Li

--L2 s

\

l l I W2 WM W 1 W FCR CIRCUMFERENTIAL WELD XYZ (V) STA MP

-TOP DEAD CENTER

  • Lo FOR CIRCUMFERENTIAL WELDS '

L2 L2

/

L1 -.

'j L 2

  1. 1 f f -m V-s e

ee6 e,\Sj-4 s>

r eee --

3 Wo FOR LONG. WELD 1 I W2 W; W FOR CIRCUMFERENTIAL WELD XYZ W & L DIMENSIONS FIGURE 4 O

GENER AL O ELECTRIC L . -.

_.. .--

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