ML20151W318

Rev 5 to MT-DRY-ASME Iii/Xi, NDE Std Magnetic Particle Exam

ML20151W318
Person / Time
Site:	Limerick
Issue date:	07/30/1986
From:	Matthew Mitchell BECHTEL POWER CORP.
To:
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References
MT-DRY-ASME-III, NUDOCS 8808240044
Download: ML20151W318 (17)

Text

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L,/ NONDESTRUCTIVE EXAMINATION STANDARD MAGNETIC PARTICLE EXAMINATION HT-DRY-ASME III/XI July 29, 1986 REV. 5 Date MATERIALS AND QUALITY SERVICES Prepared and Approved)b 7'N'b Authortred for use by NDpevel lli Examiner Da ggg, Reviewed _ _ w/c /, 40 4 /~9 y c' 1/ U Ji Mitchell Approved NM: wha MM' g., j p Manager, M&QStt s Date Manager of Const.ruction/ Dale

/

FOR LIMERICK PROJECT ONLY R, ECSVED TABLE OF CONTENTS r uCT 161986 1.0 Sc0PE BECHTEL -

2.0 PRECAUTIONS FOR PERSONNEL SAFETY 3.0 EQUIPMENT, MATERIALS AND PERSONNEL 4.0 TECHNIQUE REQUIREMENTS 5.0 INTERPRETATION OF RESULTS , Oh 6.0 STANDARDS OF ACCEPTANCE ,

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7.0 RECORDS g \\ g- '

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0 I XAMINATION; SUBCONTRACTORS A

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APPENDIX 1 Y@V of,, tL4L /V 26a/./. Shau Acc. Au/zr isdo/u 5 107/29/86) Added ASME XI, C1.iss ? Acceptance Criteria c 4 102/20/86) Rev. Appendix I - Addition to Categories 3 '02/06/86] Incorporate Client Coments gs 2 l01/09/86) Incorporate Client Coments

[ 1 0

11/21/85 1 General Revision

'08/21/851 Initial Issue - Limerick NO. I DATE l REVISONS kR DO a

1

C Docume nt Ho, Pfr-DRY-ASME III/XI ne v.

5 (Limerick Project only) Page 2 of 11 1.0 SCOPE

(' g 1.1 E), This standard provides the procedure to be used for dry, continuous, magnetic particle examination of welds and/or adjacent base metal and components.

This standard complies with the requirements of ASME Section III, 1974 Edition with Addenda through Winter 1974, and the preservice examination requirements of ASME XI, 1980 Edition with Addenda through Winter 1981.

1.2 This standard shall be used as a procedure by Bechtel NDE personnel and may magnet'sc pa as be used a procedure rticle by subcontractor NDE personnel when performing examination.

2.0 PRECAUTIONS FOR PERSONNEL SAFETY 2.1 The equipment and/or materials used per this standard shall be used in a fashion to ensure full compliance with national, state and local laws governing safety.

3.0 EQUIPMENT, MATERI ALS AND PERSONNEL 3.1 Equipment 3.1.1 Yokes 3.1.1.1 Electromagnetic yokes shall be used.

3.1.1.2 Electromagnetic yokes shall be capable of producing alternating current, (q t direct current, or both.

3.1.2 Megnetic Particle Field Indicator 3.1.2.1 A pie gauge type magnetic particle field indicator as described in SE-709 may be used to determine the adequacy of the magnetic field.

3.1.3 Ferromagnetic particles used shall be either 8A-red or 1-grey dry particles manufactured by Magnaflux Corp.

3.2 Equipment Calibration 3.2.1 Frequency of Calibration - Each piece of magnetizing equipment shall be calibrated daily, if used.

3.2.2 Yokes The magnetizing force of yokes shall be considered adequate if:

a) Each alternating current electromagnetic yoke has a lifting poner of at least 10 pounds at at least the maximum pole spacing at which it will be used.

mE b) Each direct current yoke has a lif ting power of at least 40 pounds at 8% at least the maximum pole spacing at which it will be used.

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( Document No. NT-DRY-ASME III/XI Rev. 5 (Limerick Project only) Pane 3

• of 11 t

j 3.3 Personnel 1 * ,

l 3.3.1 Bechtel personnel performing magnetic particle examination to this t

i standard shall be qualified and certified as an NDE Level I, II or III in the '

magnetic particle method, in accordance with the applicable lechtel I  !

j Nondestructive Examination Personnel Qualification Standard, NEPQ, which has been "

developed from guidelines provided by the American Society for Nondestructive Testing's Recommended Practice, SNT-TC-1A, 1980 Edition.  !'

i  :

3.3.2 . All NDE Subcontractor personnel performing magnetic particle examination

to this standard shall be qualified and certified as an NDE Level I, II, or III,  !

i in the magnetic particle method, to a personnel qualification standard developed  ;

f rom guidelines provided by the American Society for Nondestructive Testing's Recommended Practice., SNT-TC-1A, 1980 Edition.

3.3.3 only personnel certified Level II or III shall perform final evaluations.

I  ;

4.0 TECHNIQUE REQUIREMENTS '

4.1 Time of Examination t 1

i 4.1.1 l

Magnetic particle examination shall be performed af ter any required l postweld heat treatment except welds in P-number 1 materials may be examined j either before or af ter postweld heat treatment.

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4.2 Surface Preparation  !

1 >

4 m 4.2.1 The surface to be exasined may be in the as-welded, as-rolled, as-cast, 4

() or as-forged condition; however, if there are surface irregularities which could  !

I mask indications of unacceptable discontinuities, surface preparation by (

i grinding, eachining, or other method any be necessary. Final surface preparation  ;

j should be such that all required ASME III and ASME XI examinations can be  ;

accomplished without additional surface preparation.

l 4.2.2 Prior to magnetic particle examination, the surface to be examined and f' any adjacent area within at least 1 inch of the surface to be examined shall be dry and free of any dirt, grease, lint, scale, welding flux, weld spatter, oil, l or other extraneous matter that would interfere with the examination. '

4.2 2.1 Typical preeleaning agents which may be used are detergents, organic  ;

solvents, descaling solutions, paint removers, vapor degressing, sand or grit f

blasting, and ultrasonic cleaning. '

i j 4.2.3 The surface to be examined shall be thoroughly dried before beginning the  !

i l examination. Drying of the surface may be accomplished by normal evaporation or l l by forced air. '

i t l 4:3 Tempe ra tu re  !

l 4.3.1 Magnetic particle examination shall not be done on the surface of parts  !

j g{ whose temperature exceeds 600'T (315'C).

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! il 4.3.2 Magnaflum Corp., 8A Red magnetic particle powder shall not be used on

!, arlTc~1es whose surface temperature exceeds 325'F. i

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a peri.=.ac No. MT-DRY-ASHI III/XI Ra v.

. 5 (Limerick Project Cnly) Page 4 of__11 4.4 Sequence of Operation 4.4.1

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'- That is,Hagnetic the currentparticle examination shall be done by the continuous method.

shall be turned on, the magnetic particle powder shall be lighe ty dusted over the area being examined, the excess magnetic particle powder shall be removed using a gentle air stream, then the current is turned off.

4.4.2 magneticThe area powder particle under examination to detect must be observed during the application of the the formation of indications.

CAUTION:

The air stream used to remove excess magnetic particle powder must be controlled so that it does not disturb or remove lightly held powder patterns.

4.5 Methods 4.5.1 Yoke Method 4.5.1.1 Pole spacing shall be a minimum of 3 inches and a maximum of 8 inches.

4.5.1.2 The current shall be turned on af ter the poles have been properly positioned and turned off before they are removed from the component.

4.6 Examination Coverage .

4.6.1 At least two separate examinations sh&11 be carried out on each area so

(") theflux of lines inofthe flux in one examination are approximately perpendicular to the lines other.

U 4.6.2 Examinations shall be conducted with sufficient overlap to assure 100 percent coverage at the established test sensitivity. For example:

a)

When positioning a yoke longitudinally along a weld, a minimum overlap of 1 inch shall be maintained between subsequent positions.

b)

When positioning a yoke transversely along the veld, the spacing between subsequent positions shall be a maximum of one-half the pole spacing or 3 inches, whichever is smaller.

c)

When positioning yokes on odd geometries, a pie gauge type magnetic particle field indicator (paragraph 3.1.2.1) shall be used to assure proper test sensitivity and direction, as indicated by a clearly detsned line formed in the desired direction.

4.6.3 Refer to Appendix I for specific coverage requirements.

4.7 Demagnetization 4.7.1 When required, the weld or component shall be demagnetired af ter mE completion magnetic field of the examination strength meter.in accordance with ASTM E-709 and verified with a 8?i include the technique and results. A report will document any demagnetization and k( )

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D *cume n t Na Pfr-DRY-ASME III/XI Re v. 5 (Lirarick Project Only) Page 5 of 11 4.8 Post-Examination Cleaning 4.8.1 All surfaces shall be cleaned of magnetic particles after examination.

5.0 INTERPRETATION OF RESULTS M Adaquate i.._sinat.*on sha)~ bc provided to allow proper evaluation. As a cinimum, a 1/32-inch black line on an 18 percent neutral gray card shall be

• ri s ib le.

, 5.2 hticles at or near discontinuities.2ndications will be revealed by the retention of the ferro All indications revealed by magnetic particle examination are not necessarily defects. Nonrelt:vant indications can be caused by excessive surface roughness, magnetic permeability variations, or contour changes that are not relevant to the detection of unacceptable discontinuities.

5.3 Any indication in excess of the following acceptance standards which is believed to be nonrelevant shall be regarded as unacceptable and shall be reexamined to verify whether or not actual defects are present. Surface conditioning may precede the reexamination. Nonrelevant indications which would mask indications of defects a' unacceptable.

5.4 Relevant indications are those which result from unacceptable mechanical discuatinuities. Linear indications are those indications in which the length is more than three times the width. Rounded indications are indications which are circular or elliptical with the length less than three times the width.

O 5.4.1 For ASME III, Subsection NE only, linear indications are defined as having a length more than two times the width. Rounded indications are less than two times the width.

5.5 For ASME III and XI, unacceptable defects (paragtaph 6.0) shall be removed or reduced to an acceptable limit.

6.0 ST.4NDARDS OF ACCEPTANCE 6.1 ASME Section III 6.1.1 Acceptance criteria vary with the manufacturing process and the applicable subsection of ASME Section III.

6.1.1.1 All relevant indications and locations shall be recorded. "No Relevant Indications" shall be noted, when applicable.

6.1.2 Forgings and Bars (Subsections NB, NC, ND snd NE), Tubular products (Subsection NB), Castings (Subsections NB, NC, ND anj NE), and Bolts Studs and Nuts (Subsection NB). The following relevant indications are rejectable:

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D cument No. MT-DRY-ASME III/XI Ra v. 5 (Limerick Project only) Pane 6 er 11 a) Material Thickness versus Type of Indication.

T'T l l

\_/ l Type of Material Thickness l_ l lIndication l Less than 5/8" l 5/8 to Under 2" l l 1 I

l 2" and Ove r l l Linear l Greater than 1/16 I

'l l_ l l Greater than 1/8" l Greater than 3/16" l I

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lRor lad  ! Greater than 1/8" dia I l

l _, , I I(Greater than 3/16" dia IGreater than 3/16" l l

I b)

Fourt er edge- more o-ed ge . indications in a line separated by 1/16 inch or less, c)

Ten or more indications in any 6 square inches of area whose major dimension is no more than 6 inches with the dimensions taken in the most unfavorable *ocation relative to the indications being evaluated.

6.1.2.1 For materials not material specification should be used for reference.specifically addressed by this sect 6.1.3 Welds (Subsection NB, NC, ND, NE, and NF).

indications are unacceptable: The following relevant -

a) Any crack or linear indication.

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y b)

Rounded indications with dimensions greater than 3/16 inch.

c)

Four or more rounded indications in a line separated by 1/16 inch or isss, edge to edge.

d)

Ten or more rounded indications in any 6 square inches of surface with the major dimension of this area not to exceed 6 inches, with the area taken indications being inevaluated.

the most unfavorable location relative to the 6.1.4 Bolting materials snd rods grcater than 2 inches nominal size (Subsection NF). The following relevant indications are unacceptable:

a) Linear nonaxial indications.

b) Linear axial indications longer than 1 inch.

6.1. 5 keld edge preparation surfaces for material thicknesses 2 inches and above (Subsections NB and NC). The following relevant indications are unacceptable:

a) Laminar type indications longer than 1 inch.

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b) Nonlaminar linear indications longer than 3/16 inch.

EN A c) Rounded indications with dimensions greater than 3/16 inch.

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Document N3. MT-DRY-ASME III/XI uy, 5 (Limerick Project Only) p g.

7 of .1 d) Four or more nonlaminar indications in a line separated by 1/16 inch or less, edge-to-edge.

1 O 6.2 ASME Section XI 6.2.1 The following acceptance standards shall apply. The length of surface indications shall be detet,nined as illustrated in Figure 1.

A 6.2.1.1 ACCEPTANCE CRITERIA REJECTABLE INDICATIONS WELD OR NOMINAL WALL /

CATEGORY PSI ASME XI COMPONENT OTHER FERRITIC/AUSTENITIC REFERENCE B-F, C-F Piping welds t < 0. 312" > 1/8" and B-J (Similar and IWB-3514

0. 313 " t t o t < 1. 0" > 3/16" and Dissimilar) 1,0" and over > 1/4" IWC-3000 C-B Vessel nozzle welds B-G-1 Bolting 2" and Larger in diameter Nonaxial- > 1/4" IWB-3515 Axial-- > 1" O

B-H, Integral B-K-1 Attachments Refer to the allowable indication standards IWB-3516 and C-C for the applicable supported pressure and retaining component to which the integral IWC-3000 attachment is welded.

B-L-1, Pump and valve 2.0" and over B-M-1 1/4" IWB-3518 casing welds and C-C and IWC-3000 A 6.2.2 Relevant indications shall have their size and location recorded with dimensions rounded to the nearest 1/32 inch. "No Relevant Indications" shall be noted, when applicable.

6.2.3 The "Location-O" datum shall be in accordance with construction procedure 8031-CP-W-4. The indication location shall be measured along the weld in the direction that the "V" mark is pointing. The recorded location shall be the distance from the point of the "V" mark to the end of the indication closest to the point. Measurement for longitudinal welds shall be froat the intersection of the corresponding circumferential weld.

mE 84

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Dneumant No. HT-DRY-ASME III/XI ga y, 5 (Limarick Project only) Page 8 .

7.0 of 11

_ RECORDS r^ 7.1 The

(_)T form attached to this standard, Figure 2, shall be used.

7.2 As a minimum, the following information shall be recorded:

a) Weld joint or part identification b)

Examination procedure (standard), identification and revision number c)

ASME Code section, paragraph / category d) Type and color of examination particles e)

Type and serial number of magnetizing equipment f) Type of current - ac/dc g) Pole spacing h)

Indications recorded per paragraphs 6.1.1.1 or 6.2.2 i)

Note use of magnetic field indicator, when used -

j) Examination results k) Date of examination

(_)

1) Examiner's name and certification level 7.3 All records of magr. etic particle examination shall be submitted to the responsible Bechtel individual for disposition.

maintained with the permanent job files. These records shall be 7.4 particle examination to this standard and a copy of the certifi the examiner who certified them shall be maintained on file at the jobsite .

7.5 Complete qualification and certification records for Bechtel NDE fersonnel San Francisco. are maintained on file at the Materials and Quality Services office i 8.0 NONDESTRUCTIVE EXAMINATION SUBCONTRACTORS 8.1 Owner's approval.The subcontractor may be authorized to use this procedure, subject to the

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8.2 Records of magnetic particle examination performed by a nondestructive examination paragraph 7.2subcontractor of this standard.shall contain the same information as required by 3$ 8.3

$;; A Bechtel Level II or Level III shall be responsible for the evaluation 4

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and submitted by the NDE subcontractor's personnel.and disposition o I

• 15

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D*cument Ns. MT-DRY-ASME III/XI

. Rev. 5 (Limirick Projset Only) Page 9 of 11

, 8.4 Complete qualification and certificatior. records for each NDE p this standard, and the qualification and certification record V examiner who Bechtel Level III within M&QS prior to the beginning of a .

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I Document Nn. MT-DRY-ASME III/XI Rev. 5 (Limarick Project Only) Page 10 of

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LINEAR SURFACE INDICATIONS Illustrative Flaw Configurations and Determination of Length (a)

Flavs shall be considered as a single linear indication provided the Q separation dimension "S" distancewhere "S" between indications is equal to or less than the N is determined as shown above.

(b) The overall length be determined as shown above.of a single and discontinuous surface indication shall

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MT-DRY-ASME III/XI Rev. 5 Limerick Project only) reg, 11 str 11 D

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I k Page of MAGNETIC PARTICLE EIAMIRATION REPORT ARIA / 5YSTEN EXAMINID RIPORT No.

JOS NO. AND PROJECT NDE PROCEDUR! NO. ASME SECTION POLE SPACING

-TYPE AC TIM 7ERATURL OF NATTRI AL 111 or I!? -

PAAACRAPH/CATE3 RY g g g,l 5 TRIAL No.

h TYPE OF CURRINT TYPE AND COLOR OF TYPE AND SERIAL NUMBER OF E MMINATION PARTICLES AC of DC MACNETIZING EQUIPMENT l l l INDICATION CODE:

L1-tinest Indication NRI-No Relevant ledication C-Crack P-Porosity NT-Monfusion INDICA-TION RZJECT CODE INDICATION AND LOCATION

• ACCEPT PART OR VELD WWBER p) s L.)

'5KITCHES, IP NECESSARY , MAY BE MADE ON TML REVERSE SIDE OF THIS POR.M.

NOTIS: LEVEL DATE EXAMINER LEVEL DATI XXVIEVER LEVEL DATI RIVIEVER LEVEL DATE RIY1EVER M S- C E-019 REV . 2 01/10/86 oE om t /^\

U FIGURE 2. NONDESTRUCTIVE EXAMINATION REPORT g .

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, APPENDIX I Page 1 EXAMINATION COVERAGE REQUIREMENTS ASME SECTION III A For ASME III, Subsection NB butt velds, the external and accessible internal weld surfaces and adjacent base material for at least 1/2 inch on each side of the weld shall be examined. For ASME III, Su)section NF and NG, the external weld surfaces and adjacent base material for at least 1/2 inch on each side of the weld shall be examined. For ASME Subsection NB socket and fillet velds and all other welds not listed above which require a liquid penetrant examination, only the external weld surfaces need be examined. Weld edge preps require the prep face only.

1 ASME SECTION XI Code Component and Ca te go ry Weld Type Width Length CLASS 1 B-F and B-J circumferential weld + 1/2" on 100%

(pressure both sides retaining similar and longitudinal weld + 1/2" on O dissimilar both sides 100%

piping welds) branch connections weld and radius + 100%

the lesser of 1" or 1/2t on each side (see pages 3, 4, and 5) socket welds weld + 1/2" on pipe 100%

side and 1" on the other side B-L-1 and pump casing and weld + 1/2" on 100%

B-M-1 valve body welds both sides; inside and out-side of pump, outside only of valve B-H and all integrally veld + 1/2" on 100%

B-K-1 welded attach- each accessible ments side of weld O NOTE: t = nominal thickneso

T APPENDIX I Page 2 ASME SECTION XI Code Component and Category Weld Type

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Width Length CLASS 2 C-B vessel nozzle welds nozzle radius and 100%

veld + 1/2" on both sides of the veld C-C all integral weld + 1/2" on 100%

attachments all sides C-P Piping: .

circumferential weld + 1/2" on ~

velds greater both sides 100%

than 4" NPS longitudinal welds greater weld + 1/2" on 2.5t at the both sides intersecting than 4" NPS circumferential weld or branch connection veld branch connection radius and weld welds greater 100%

+ 1/2" on both than 4" NPS sides of weld C-G pressure-weld + 1/2" on 100%

retaining welds both sides, from in pumps and either inside or valves outside of component i

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