ML20151W310
| ML20151W310 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 07/30/1986 |
| From: | Matthew Mitchell BECHTEL POWER CORP. |
| To: | |
| Shared Package | |
| ML20151W267 | List: |
| References | |
| PT(SR)-ASME-III, NUDOCS 8808240040 | |
| Download: ML20151W310 (11) | |
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accaret cosstaucrto". 1"c-NONDESTRUCTIVE EXAMINATION STANDARD LIQUID PENETRANT (SOLVENT REMOVABLE)
PT(SR)-ASME III/XI Date July 29, 1986 REVTSTON 5 MATERIALS AND QUALITY SERVICES I~ N b Prepared and Approved A=-
Authortzed for use by
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' Dale FOR LIMERICK PROJECT ONLY ECEVED TABLE OF CONTENTS Q(,I.1/5 h \\
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PRECAUTIONS FOR PERSONNEL SAFETY. >BECHTEL 2.0 f. > ^ 'j u u
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5.0 INTERPRE T 6.0 STANDARDS OF ACCEPTANCE 7.0 RECORDS 8.0 NONDESTRUCTIVE EXAMINATION SUBCONTRACTORS FICURES 1 AND 2 APPENDIX I NDE-PQR-001 yg/h 44,,41 A tM g( SL'i/ fra t.ex/2r toA0lss 5
107/29/86) Added ASME XI, Class 2 Acceptance Criteria 4
' 02/20/86) Rev. Appendix I - Addition to Categories gg "O
3 02/06/86 l Incorporate Client Comments b]
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' 01/09/86'l Incorporate Client Requirements 1
'111/20/85; General Revision
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'08/26/85 1 Initial Issue - Limerick NO. 1D ATE
- l REVISONS 0808240040 080015 PDR ADOCK 0500 3
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6.
tecarcr.t tN PT(SR)-ASME III/XI Rev. 5 (For Limerick Only)
Pane 2 of 11 1.0 SCOPE i
A 1.1 This standard provides the procedure to be used as a minimum for visible i
dye, solvent removable liquid penetrant examination of welds, adjacent base metal j -
and components.
1974 Edition with addenda through Winter 1974, and the preservice e i
requirements of ASME Section XI,1980 Edition with addenda through Winter 1981.
1.2 This standard shall be used as a procedure by Bechtel NDE personnel and I
may be used as a procedure by subcontractor NDE personnel when performing liquid penetrant examinations.
i 2.0 PRECAUTIONS FOR PERSONNEL SAFETY 2.1 The materials and/or equipment used for exarsination shall be utilised to 4
ensure full compliance with national, state and local laws governing safety.
2.2 Liquid penetrant materials should be used in well ventilated areas.
The liquids or aerosol cans should not be heated above 130 degrees F (54C), exposed to open flames or hot surfaces.
Aerosol cans shall not be thrown into an open fire.
2.3 If penetrant materials require heating to reach operating temperature, heating shall be done by using a hot water bath having an innsersed thermometer..
i 3.0 MATERIALS AND PERSONNEL i
3.1 Materials
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Solvent removable penetrant materials shall be selected from the same i
A 3.1.1 manufacturer and family listed in Table 1 of NDE-PQR-001 (attached) for each i
examination.
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3.1.2 Certification records for penetrant materials shall be available at the I
1 jobsite documenting batch number and that neither the sulfur or the halogen j
content of the residue exceeds 1 percent by weight.
3.2 Personnel 3.2.1 Bechtel personnel performing liquid penetrant examination to this standard shall be qualified and certified as an NDE Level I, II or III, in the liquid l
penetrant method, in accordance with the applicable Bechtel Nondestructive I
Examination Personnel Qualification Standard, NEPQ which have been developed from guidelines provided by the American Society for Nondestructive Testing's i
Recoussended Practice SNT-TC-1A,1980 Edition.
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f 3.2.2 All NDE subcontractor personnel performing liquid penetrant examination to
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this standard shall be qualified and certified as an NDE Level I, II or III, in the liquid penetrant method, to a personnel qualification standard developed from a
guidelines provided by the American Society for Nondestructive Testing's Recommended Practice, SNT-TC-1A, 1980 Edition.
i j mE iSA 3.2.3 Only personnel certified Level II or III shall perform final evaluations.
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1 Document No, PT(SR)-ASME III/XI Re y, 5 (For Limerick Only)
Page 3 of 11 4.0 TECHNIQUE REQUIREMENTS g
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4.1 Time of Examination 4.1.1 Final acceptance liquid penetrant examinations shall be perfomed af ter any required postweld heat be examined either before or af ter postweld heat treatment. treatment except that velds i 4.2 Surface Preparation 4.2.1 The surface to be examined may be in the as-welded, as-rolled, as-cast, or as-forged condition.
Howe ve r, if there are surface irregularities which could mask indications of unacceptable discontinuities, surface preparation by grinding or machining or other methods may be necessary.
4.2.2 Final surface preparation should be such that all required ASME III and ASME XI examinations can be accomplished without additional surface preparation.
4.2.3 Prior to liquid penetrant examination, the surface to be examined and all adjacent areas within at least 1-inch shall be dry and free of any dirt, grease, lint, scale, welding flux, weld spatter, oil, or other extraneous matter which could obscure surface openings or otherwise interfere with the examination.
a)
Typical preeleaning and posteleaning agents which may be used are detergents, organic solvents, descaling solutions, paint removers, and liquid penetrant cleaners.
g The cleaning agents used shall meet the contaminant requirements of q
paragraph 3.1.2.
CAUTION:
Blasting with shot or dull sand may peen discontinuities at the surface and shall not be used.
4.2.4 The surface to be examined shall be thoroughly dried before beginning the examination.
Drying of the surface may be accomplished by normal evaporation or by using forced air.
4.3 Liquid Penetrant Examination 4.3.1 The temperature of the penetrant and the part to be examined shall be between 40' (4.4'C) and 125'F (51.5'C) inclusive.
Qualification of this standard is evidenced by the attached Procedure Qualification Record, NDE-PQR-001.
4.3.2 The surface to be examined and any adjacent area within 1 inch shall be cleaned using a liquid penetrant cleaner from Table 1 of NDE-PQR-001.
Cleaning shall be performed by wiping the surfaces with a clean cloth or absorbent paper towel moistened with cleaner, or the cleaner may be applied directly to the surface of the part. The part shall then be allowed to dry for at least two minutes prior to application of the penetrant.
4.4 Application of Liquid Penetrant 82 4.4.1 Refer to Appendix I for specific coverage requirements.
4.4.2 The penetrant shall be applied by spraying, brushing, or dipping.
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Doc ume 7 t No, PT(SR)-ASME III/XI g, y, 5 (F:r Lim 2 rick Only) p g. 4 of 11 4.4.3 To prevent the penetrant from becoming dry or tacky, it may be necessary to reapply penetrant during the specified dwell time.
If it should actually
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become dry or tacky, the examination shall be considered invalid, the area recleaned as specified in paragraph 4.3.2 and reexamined in accordance with this standard.
4.4.4 Penetrant dwell times shall be in accordance with the manufacturer's recommendation but shall not be less than 10 minutes.
4.5 Removal of Penetrants 4.5.1 Remove as much penetrant as possible by wiping with a clean cloth or absorbent paper, repeating the operation until most traces of penetrant have been removed.
The remaining traces shall be removsd by wiping the surf ace lightly with a clean cloth or absorbent paper lightly moistened with solvent.
To minimize removal of penetrant from discontinuities, care shall be taken to avoid the use of excess solvent.
Flushing the surface with solvent, the penetrant and prior to developing, is prohibited.following the application of 4.6 D rying 4.6.1 The surfaces may be dried by normal evaporation, or wiping. A minimum of
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five minutes shall be allowed for drying the item to be examined before application of the developer.
4.7 Application of Developer f'l h
4.7.1 Af ter the penetrant removal and drying operation has been completed, the developer shall be applied by spraying only.
4.7.2 The developer shall be thoroughly agitated to assure that the solids are in liquid suspension prior to application.
4.7.3 Heavy coatings of developer shall be avoided.
Only enough developer shall be evenly applied to produce a thin uniform white layer and to cover 611 traces of metallic luster.
While applying the developer, the nozzle should be held at a distance of 12 to 16 inches from the examination surface.
4.7.4 The developing time required to draw penetrant from discontinuities into the dried developer on the surface shall be a minimum of 7 minutes and a maximum of 30 minutes.
Interpretation of examination results for acceptance must be made within this time period.
4.7.5 The surface being examined should be observed during the developing period to detect the nature of indications which bleed out.
4.7.6 Precautions should be taken to prevent any object f rom touching the dry developer film because it is loosely held and easily damaged.
5.0 INTERPRETATION OF RESULTS mS gg 5.1 Adequate illumination shall be provided to allow proper evaluation.
minimum, a 1/32 inch black line on an 18% neutral gray card shall be visible.As a Eo D' wa
Detueent Me.
PT(SR)-ASME III/XI Ra v.
5 (Fct Limerick Only)
Page 5 of 11 Voids or crevices open to the surface will be revealed as red indications -
5.2 in the developer background. An indication of a discontinuity may be larger than 7s j the discontinuity that caused it; however, the size of the indication and not the s
size of the discontinuity is the basis for acceptance or rejection.
5.3 Hechanical discontinuities at the surface will be indicated by bleeding out of the penetrant; however, localized surface imperfections such as may occur from machining marks or surface conditions may produce similar indications which are nonrelevant to the detection of unacceptable discontinuities.
5.4 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 and broad areas of pigmentation which would mask indications of defects are unacceptable.
A 5.5 Relevant indications are those whose major dimension exceeds 1/16 inch and which result from mechanical discontinuities.
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.
5.5.1 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.
5.6 For ASME III and XI, unacceptable defects (paragraph 6.0) shall be removed
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or reduced to an acceptable limit.
v 5.7 Post-Examination Cleaning 5.7.1 Af ter interpretation of the area being examined, excess liquid penetrant materials shall be removed.
Most of the dry developer can be removed by wiping the surf ace with a dry cloth or paper towel.
Post-examination cleaning shall be accomplished with etterials specified in paragraph 4.2.3. a).
The cleaning solvent may be; applied directly to the surface being cleaned.
6.0 STANDARDS OF ACCEPTANCE 6.1 ASME Section III 6.1.1 Acceptance criteria vary with the manufacturing process and the applicable subsection of ASHZ 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 and NE), Tubular products (Subsection NB), Castings (Subsections NB, NC, ND and NE), and Bolts. Studs and Nuts (Subsection NB).
Ihe followi'ng relevant indications are rejectable:
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Docueent Mr.
PT(SR)-A$ht III/XI Re v. 5 (Fer tirerick Only)
Page 6 of 11 a) Haterial Thickness versus Type of Indication.
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l Material Thickness
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l Type of I
-l l Indication l
_Less than 5/8" l
5/8 to Under 2" l
2" and over l
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~l l Linear IGreater than 1/16 IGreater than 1/8" l Greater than 3/16" l l
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I l Rounded IGreater than 1/8" dia (Greater than 3/16" dia lGreater than 3/16" l l
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b)
Four or more indications in a line separated by 1/16 inch or less, edge-to-edge.
c)
Ten or more Indications in any 6 square inches of area whose major dimensior, is no more than 6 inches with the dimensions taken in the most unfavorable location relative to the indications being evaluated.
6.1.2.1 For materials not specifically addressed by this section, the applicable material specification should be used for reference.
6.1.3 Welds (Subsection NB, NC, ND, NE, and NF).
The following relevant indications are unacceptable:
a) Any crack or linear indication.
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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 less, 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 in the most unfavorable location relative to the indications being evaluated.
6.1.4 Bolting materials and rods greater 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 Weld edge preparation surfaces for material thicknesses 2 inches and above (Subsections NB and NC).
The following
.evant indications are unacceptable:
a) Laminar type indications longer than 1 inch, b) Nonlaminar linear indications longer than 3/16 inch.
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c)
Rounded indications with dimensions greater than 3/16 inch.
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Document No.
PT(SR)-ASME III/XI Re v. 5 (For Limerick Only)
Page 7 of 11 d)
Four or more nontaminar indications in a line separated by 1/16 inch r~x U
or less, edge-to-edge are unacceptable.
6.2 ASME Section XI 6.2.1 The following acceptance standards shall apply.
The length of surface indications shall be determined as illustrated in Figure 1.
A 6.2.1.1 ACCEPTANCE CRITERIA REJECTABLE INDICATIONS WELD OR NOMINAL WALL /
PSI ASME XI CATECORY COMPONEMt OIRER FERRITIC/AUSTENITIC REFERENCE B-F, C-F Piping welds e <0.312"
> 1/8" IWB-3514 and B-J (Similar and 0.313" t to e < 1. 0">
3/16" and Dissimilar) 1.0" and over
> 1/4" IWC-3000 C-B Vessel nogale welds 7s B-G-1 Bolting 2" and Larger in Nonaxial-- > 1/4" IWB-3515
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diameter Axial--
> 1" B-H, Integral Refer to the allowable indication standards IWB-3516 B-K-1 Attachments for the applicable supported pressure and and C-C retaining component to which the integral IWC-3000 attachment is velded.
B-L-1, Pump and valve 2.0" and over
> 1/4" B-M-1 casing welds IWB-3518 and C-G and IWC-3000 A
6.2.2 Relevant indications shall have their size and location recorded, with dimensions rounded to the aearest 1/32 inch.
"No Relevant Indications" shall be noted, when applicable.
6.2.3 The "Location-0" datum shall be in accordance with Construction Procedure 80 31 -CP-W-4.
The indication location shall be measured al,ong the weld in the direction that the "V" mark is pointing.
The recorded location shall be the distance f rom the point of the "V" mark to the end of tha indication closest mE to the point.
The measurement for longitudinal velds sh !1 ba fits t ra intersection
%?P of the corresponding circumferential weld.
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T Documen t No.
PT(SR)-ASME III/XI Re v. 5 (For Limerick Only)
Page 8 of 11
- 7. 0 RECORDS (o) 7.1 The 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) Date of examination e) Examiner's name and certification level f) Examination results g)
Indication recorded per paragraph 6.1.1.1 or 6.2.2.
h) All penetrant materials batch numbers i) Surface temperature of material being examined j) Serial number of temperature measuring device f-7.3 All records of liquid penetrant examination shall be submitted to the
(_3) responsible Bechtel individual for disposition.
These records shall be maintained with the permanent job files.
7.4 A copy of the certification records for all personnel performing liquid penetrant examination to this standard and a copy of the certification record of the examiner who certified them shall be maintained on file at the jobsite.
,7,., 5 Complete quclification and certification records for Bechtel NDE personnel are maintained on file at the Haterials and Quality Services office in San Francisco.
8.0 NONDESTRUCTIVE EXAMINATION SUBCONTRACTORS 8.1 The subcontractor may be authorized to use this procedure, subject to the Owner's approval.
8.2 Records of liquid penetrant examination performed by a nondestructive examination subcontractor shall contain the same information as required by paragraph 7.2 of this standard.
8.3 A Bechtel Level II or Level III shall be responsible for the evaluation and disposition of all liquid penetrant examination results and reports prepared and submitted by the NDE subcont ractor's pet sonnel.
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Docume n t No.
PT(SR)-ASME III/XI Re v.
$ (Fer Limerick Only)
Fate 9 of 11 8.4 Complete qualification and certification records for each NDE subcontractor individual who will be performing liquid penetrant examination to
,e s Ui this standard, and the qualification and certification record of the examiner who certified each individual, shall be submitted for review and acceptence by a Bechtel Level III within H&QS prior to the beginning of any examination.
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PT(SR)-ASME III/XI Re v.
5 (For timerlek Only)
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FIGURE 1.
LINEAR SURTACE INDICATIONS Illustrative Flaw Configurations and Determination of Length (a)
Flavs shall be considered as a single linear indication provided the separation distan:e between indications is equal to or less than the g
Een dimension "S" where "S" is determined as shown above.
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(b) The overall length of a single and discontinuous surface indication shall F '9 de determined a, shown above.
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e Document No.
PT(SR)-ASME III/XI (Fer Licarick Only)
Page 11 of 11
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Page of LIQUID PtrtTwrf IIMIMATION UPORT Jol NO. AND PROJECT Au A/$T $f EM EXAMINID M PORT Mv.
TTPE AND TIM?tRATUlti 07 MTIRI AL CE PROCEDilu No.
A$C SECTION 111 or I!? l TXER.MOC TER PARACRAPM/CATICORY
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RIV. l MATTRIAL MrJF acTru R / ot s lC uTION RATCM NO.
Cleaner Penetrant De v e l o pe r ICICATION CODE:
C-Crack P-Porosity IrF-Nonfusion L1-Linear Indication IrR!-No Relevant Indication PART OR WILD frLHRER ACCEPT RIJECT I C ICATION A C LOCATION' r3 N
85MTCMLS, IF NECESSARY. MY BE MDL ON THE RtyERSL $1DE OF TMil POR.%
NOTES:
EAAMINER Ltv1L DATI RZv!!WER LEVIL DATL Rty!!WIR LEVEL DATI u v!LWER LEVIL DATE I
MQS-CE-018 Rev. t 01/10/86 e
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FICURE 2.
NONDESTRUCTIVE EXAMINATION REPORT
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