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Tiêu chuẩn ASME 2015 về lò hơi và bình bồn áp lực. Chương V Kiểm tra không phá hủy. Mô tả nguyên lý cơ bản, quy trình, kỹ thuật thực hiện theo tiêu chuẩn ASME 2015 sử dụng các phương pháp Kiểm tra không phá hủy như: Chụp ảnh phóng xạ (truyền thống, kỹ thuật số), Siêu âm (truyền thống, mảng pha), Kiểm tra hạt từ, Kiểm tra thẩm thấu lỏng, Kiểm tra rò rỉ, Kiểm tra phát xạ âm,...
ASME BPVC.V-2015 SECTION V 2015 ASME Boiler and Pressure Vessel Code An International Code N on de st ruct iv e Exa a t ion AN INTERNATIONAL CODE 2015 ASME Boiler & Pressure Vessel Code 2015 Edition July 1, 2015 V NONDESTRUCTIVE EXAMINATION ASME Boiler and Pressure Vessel Committee on Nondestructive Examination Two Park Avenue • New York, NY • 10016 USA Date of Issuance: July 1, 2015 This international code or standard was developed under procedures accredited as meeting the criteria for American National Standards and it is an American National Standard The Standards Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate The proposed code or standard was made available for public review and comment that provides an opportunity for additional public input from industry, academia, regulatory agencies, and the public-at-large ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device, or activity ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable letters patent, nor assume any such liability Users of a code or standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME procedures and policies, which precludes the issuance of interpretations by individuals The endnotes and preamble in this document (if any) are part of this American National Standard ASME collective membership mark Certification Mark The above ASME symbol is registered in the U.S Patent Office “ASME” is the trademark of The American Society of Mechanical Engineers The Specifications published and copyrighted by the American Society for Testing and Materials are reproduced with the Society’s permission No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher Library of Congress Catalog Card Number: 56-3934 Printed in the United States of America Adopted by the Council of The American Society of Mechanical Engineers, 1914; latest edition 2015 The American Society of Mechanical Engineers Two Park Avenue, New York, NY 10016-5990 Copyright © 2015 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All rights reserved TABLE OF CONTENTS List of Sections Foreword Statement of Policy on the Use of the Certification Mark and Code Authorization in Advertising Statement of Policy on the Use of ASME Marking to Identify Manufactured Items Submittal of Technical Inquiries to the Boiler and Pressure Vessel Standards Committees Personnel ASTM Personnel Summary of Changes List of Changes in Record Number Order Cross-Referencing and Stylistic Changes in the Boiler and Pressure Vessel Code xv xvii xix xix xx xxii xxxix xl xlv xlviii Nondestructive Methods of Examination General Requirements Scope General Equipment Procedure Calibration Examinations and Inspections Evaluation Records/Documentation 1 2 3 3 Mandatory Appendix I Glossary of Terms for Nondestructive Examination Mandatory Appendix II Supplemental Personnel Qualification Requirements for NDE Certification 22 Imperfection vs Type of NDE Method 25 Radiographic Examination Scope General Requirements Equipment and Materials Calibration Examination Evaluation Documentation 27 27 27 27 29 29 34 35 Mandatory Appendix I In-Motion Radiography 36 Mandatory Appendix II Real-Time Radioscopic Examination 38 Mandatory Appendix III Digital Image Acquisition, Display, and Storage for Radiography and Radioscopy 40 Interpretation, Evaluation, and Disposition of Radiographic and Radioscopic Examination Test Results Produced by the Digital Image Acquisition and Display Process 42 Mandatory Appendix V Glossary of Terms for Radiographic Examination 44 Mandatory Appendix VI Acquisition, Display, Interpretation, and Storage of Digital Images of Radiographic Film for Nuclear Applications 45 Subsection A Article T-110 T-120 T-130 T-150 T-160 T-170 T-180 T-190 Nonmandatory Appendix A Article T-210 T-220 T-230 T-260 T-270 T-280 T-290 Mandatory Appendix IV iii Mandatory Appendix VI Supplement A 48 Mandatory Appendix VII Radiographic Examination of Metallic Castings 51 Mandatory Appendix VIII Radiography Using Phosphor Imaging Plate 52 Mandatory Appendix IX Application of Digital Radiography 55 Nonmandatory Appendix A Recommended Radiographic Technique Sketches for Pipe or Tube Welds 58 Nonmandatory Appendix C Hole-Type IQI Placement Sketches for Welds 61 Nonmandatory Appendix D Number of IQIs (Special Cases) 66 Ultrasonic Examination Methods for Welds Scope General Equipment Miscellaneous Requirements Techniques Calibration Examination Evaluation Documentation 69 69 69 69 74 74 77 82 83 84 Mandatory Appendix I Screen Height Linearity 86 Mandatory Appendix II Amplitude Control Linearity 87 Mandatory Appendix III Time of Flight Diffraction (TOFD) Technique 88 Mandatory Appendix IV Phased Array Manual Raster Examination Techniques Using Linear Arrays 93 Phased Array E-Scan and S-Scan Linear Scanning Examination Techniques 94 Ultrasonic Examination Requirements for Workmanship Based Acceptance Criteria 96 Ultrasonic Examination Requirements for a Fracture Mechanics Based Acceptance Criteria 98 Procedure Qualification Requirements for Flaw Sizing and Categorization 100 Mandatory Appendix X Ultrasonic Examination of High Density Polyethylene 102 Nonmandatory Appendix A Layout of Vessel Reference Points 105 Nonmandatory Appendix B General Techniques for Angle Beam Calibrations 106 Nonmandatory Appendix C General Techniques for Straight Beam Calibrations 112 Nonmandatory Appendix D Examples of Recording Angle Beam Examination Data 114 Nonmandatory Appendix E Computerized Imaging Techniques 117 Nonmandatory Appendix G Alternate Calibration Block Configuration 123 Nonmandatory Appendix I Examination of Welds Using Angle Beam Search Units 126 Nonmandatory Appendix J Alternative Basic Calibration Block 127 Nonmandatory Appendix K Recording Straight Beam Examination Data for Planar Reflectors 130 Nonmandatory Appendix L TOFD Sizing Demonstration/Dual Probe — Computer Imaging Technique 131 Article T-410 T-420 T-430 T-440 T-450 T-460 T-470 T-480 T-490 Mandatory Appendix V Mandatory Appendix VII Mandatory Appendix VIII Mandatory Appendix IX iv Nonmandatory Appendix M General Techniques for Angle Beam Longitudinal Wave Calibrations 134 Nonmandatory Appendix N Time of Flight Diffraction (TOFD) Interpretation 137 Nonmandatory Appendix O Time of Flight Diffraction (TOFD) Technique — General Examination Configurations 157 Nonmandatory Appendix P Phased Array (PAUT) Interpretation 160 Nonmandatory Appendix Q Example of a Split DAC Curve 168 Nonmandatory Appendix R Straight Beam Calibration Blocks for Restricted Access Weld Examinations 170 Ultrasonic Examination Methods for Materials Scope General Equipment Calibration Examination Evaluation Documentation 173 173 173 173 174 176 177 177 Mandatory Appendix I Ultrasonic Examination of Pumps and Valves 179 Mandatory Appendix II Inservice Examination of Nozzle Inside Corner Radius and Inner Corner Regions 180 Mandatory Appendix III Glossary of Terms for Ultrasonic Examination 181 Mandatory Appendix IV Inservice Examination of Bolts 182 Liquid Penetrant Examination Scope General Equipment Miscellaneous Requirements Technique Calibration Examination Evaluation Documentation 183 183 183 183 183 184 185 185 187 187 Mandatory Appendix I Glossary of Terms for Liquid Penetrant Examination 188 Mandatory Appendix II Control of Contaminants for Liquid Penetrant Examination 189 Mandatory Appendix III Qualification Techniques for Examinations at Nonstandard Temperatures 190 Magnetic Particle Examination Scope General Equipment Miscellaneous Requirements Technique Calibration Examination Evaluation Documentation 192 192 192 192 192 193 196 199 201 202 Magnetic Particle Examination Using the AC Yoke Technique on Ferritic Materials Coated with Nonmagnetic Coatings 203 Article T-510 T-520 T-530 T-560 T-570 T-580 T-590 Article T-610 T-620 T-630 T-640 T-650 T-660 T-670 T-680 T-690 Article T-710 T-720 T-730 T-740 T-750 T-760 T-770 T-780 T-790 Mandatory Appendix I v Mandatory Appendix II Glossary of Terms for Magnetic Particle Examination 206 Mandatory Appendix III Magnetic Particle Examination Using the Yoke Technique with Fluorescent Particles in an Undarkened Area 207 Qualification of Alternate Wavelength Light Sources for Excitation of Fluorescent Particles 209 Mandatory Appendix V Requirements for the Use of Magnetic Rubber Techniques 211 Nonmandatory Appendix A Measurement of Tangential Field Strength with Gaussmeters 214 Eddy Current Examination Scope 215 215 Mandatory Appendix I Glossary of Terms for Eddy Current Examination 216 Mandatory Appendix II Eddy Current Examination of Nonferromagnetic Heat Exchanger Tubing 217 Mandatory Appendix III Eddy Current Examination on Coated Ferritic Materials 224 Mandatory Appendix IV External Coil Eddy Current Examination of Tubular Products 226 Mandatory Appendix V Eddy Current Measurement of Nonconductive-Nonmagnetic Coating Thickness on a Nonmagnetic Metallic Material 228 Eddy Current Detection and Measurement of Depth of Surface Discontinuities in Nonmagnetic Metals with Surface Probes 231 Eddy Current Examination of Magnetic and Nonmagnetic Conductive Metals to Determine if Flaws are Surface-Connected 234 Eddy Current Examination of Nonferromagnetic Heat Exchanger Tubing 238 Visual Examination Scope General Equipment Technique Evaluation Documentation 244 244 244 245 245 245 245 Glossary of Terms for Visual Examination 246 Leak Testing Introduction 247 247 Mandatory Appendix I Bubble Test — Direct Pressure Technique 250 Mandatory Appendix II Bubble Test — Vacuum Box Technique 252 Mandatory Appendix III Halogen Diode Detector Probe Test 254 Mandatory Appendix IV Helium Mass Spectrometer Test — Detector Probe Technique 257 Mandatory Appendix V Helium Mass Spectrometer Test — Tracer Probe Technique 260 Mandatory Appendix VI Pressure Change Test 263 Mandatory Appendix VII Glossary of Terms for Leak Testing 265 Mandatory Appendix VIII Thermal Conductivity Detector Probe Test 266 Mandatory Appendix IX Helium Mass Spectrometer Test — Hood Technique 269 Mandatory Appendix X Ultrasonic Leak Detector Test 272 Mandatory Appendix IV Article T-810 Mandatory Appendix VI Mandatory Appendix VII Mandatory Appendix VIII Article T-910 T-920 T-930 T-950 T-980 T-990 Mandatory Appendix I Article 10 T-1000 vi Nonmandatory Appendix A Supplementary Leak Testing Equation Symbols 274 Acoustic Emission Examination of Fiber-Reinforced Plastic Vessels Scope General Equipment Calibration Examination Evaluation Documentation 275 275 275 276 276 277 283 284 Mandatory Appendix I Instrumentation Performance Requirements 285 Mandatory Appendix II Instrument Calibration 288 Mandatory Appendix III Glossary of Terms for Acoustic Emission Examination of FiberReinforced Plastic Vessels 289 Sensor Placement Guidelines 290 Acoustic Emission Examination of Metallic Vessels During Pressure Testing Scope General Equipment Calibration Examination Evaluation Documentation 296 296 296 297 297 298 299 299 Mandatory Appendix I Instrumentation Performance Requirements 302 Mandatory Appendix II Instrument Calibration and Cross-Referencing 304 Mandatory Appendix III Glossary of Terms for Acoustic Emission Examination of Metal Pressure Vessels 305 Nonmandatory Appendix A Sensor Placement Guidelines 306 Nonmandatory Appendix B Supplemental Information for Conducting Acoustic Emission Examinations 311 Continuous Acoustic Emission Monitoring of Pressure Boundary Components Scope General Equipment Miscellaneous Requirements Technique/Procedure Requirements Calibration Examination Evaluation/Results Reports/Records 312 312 312 313 315 316 318 318 319 319 Mandatory Appendix I Nuclear Components 321 Mandatory Appendix II Non-Nuclear Metal Components 323 Mandatory Appendix III Nonmetallic Components 325 Mandatory Appendix IV Limited Zone Monitoring 327 Mandatory Appendix V Hostile Environment Applications 329 Article 11 T-1110 T-1120 T-1130 T-1160 T-1170 T-1180 T-1190 Nonmandatory Appendix A Article 12 T-1210 T-1220 T-1230 T-1260 T-1270 T-1280 T-1290 Article 13 T-1310 T-1320 T-1330 T-1340 T-1350 T-1360 T-1370 T-1380 T-1390 vii Mandatory Appendix VI Leak Detection Applications 332 Mandatory Appendix VII Glossary of Terms for Acoustic Emission Examination 334 Examination System Qualification Scope General Requirements Equipment Application Requirements Conduct of Qualification Demonstration Calibration Examination Evaluation Documentation and Records 335 335 335 336 336 338 339 339 341 341 Mandatory Appendix I Glossary of Terms for Examination System Qualification 342 Mandatory Appendix II UT Performance Demonstration Criteria 343 Article 15 T-1510 T-1520 T-1530 T-1540 T-1560 T-1570 T-1580 T-1590 Alternating Current Field Measurement Technique (ACFMT) Scope General Equipment Miscellaneous Requirements Calibration Examination Evaluation Documentation 346 346 346 346 347 347 349 349 349 Article 16 T-1610 T-1620 T-1630 T-1640 T-1650 T-1660 T-1670 T-1680 Magnetic Flux Leakage (MFL) Examination Scope General Equipment Requirements Calibration Examination Evaluation Documentation 350 350 350 351 351 351 351 352 352 Article 17 T-1710 T-1720 T-1730 T-1750 T-1760 T-1770 T-1780 T-1790 Remote Field Testing (RFT) Examination Method Scope General Equipment Technique Calibration Examination Evaluation Documentation 354 354 354 354 354 355 357 357 357 Article 18 T-1810 T-1820 T-1830 T-1840 T-1850 T-1860 T-1870 T-1880 T-1890 Acoustic Pulse Reflectometry (APR) Examination Scope General Equipment Miscellaneous Requirements Prior to the Examination Calibration Examination Evaluation Documentation 359 359 359 359 361 361 361 362 362 362 Article 19 Guided Wave Examination Method for Piping 364 Article 14 T-1410 T-1420 T-1430 T-1440 T-1450 T-1460 T-1470 T-1480 T-1490 viii T-1910 T-1920 T-1930 T-1950 T-1960 T-1970 T-1980 T-1990 Scope General Equipment Wave Modes Calibration Examination Evaluation Documentation 364 364 364 364 365 366 366 366 Operation of GWT Systems 368 Documents Adopted by Section V 371 Article 22 Radiographic Standards 372 Article 23 Ultrasonic Standards 466 Article 24 Liquid Penetrant Standards 573 Article 25 Magnetic Particle Standards 612 Article 26 Eddy Current Standards 668 Article 29 Acoustic Emission Standards 687 Article 30 Terminology for Nondestructive Examinations Standard 768 Article 31 Alternating Current Field Measurement Standard 807 Mandatory Appendix II Standard Units for Use in Equations 822 Nonmandatory Appendix A Guidance for the Use of U.S Customary and SI Units in the ASME Boiler and Pressure Vessel Code 823 Nonmandatory Appendix A Subsection B FIGURES T-275 I-263 VI-A-1 A-210-1 C-210-1 C-210-2 C-210-3 C-210-4 D-210-1 D-210-2 D-210-3 D-210-4 D-210-5 D-210-6 D-210-7 D-210-8 T-434.1.7.2 T-434.2.1 T-434.3-1 T-434.3-2 T-434.4.1 T-434.4.2.1 T-434.4.2.2 T-434.4.3 Location Marker Sketches Beam Width Determination Reference Film Single-Wall Radiographic Techniques Side and Top Views of Hole-Type IQI Placements Side and Top Views of Hole-Type IQI Placements Side and Top Views of Hole-Type IQI Placements Side and Top Views of Hole-Type IQI Placements Complete Circumference Cylindrical Component Section of Circumference 240 deg or More Cylindrical Component (Example is Alternate Intervals) Section(s) of Circumference Less than 240 deg Cylindrical Component Section(s) of Circumference Equal to or More than 120 deg and Less than 240 deg Cylindrical Component Option Complete Circumferential Welds Spherical Component Welds in Segments of Spherical Component Plan View A-A Array of Objects in a Circle Ratio Limits for Curved Surfaces Nonpiping Calibration Blocks Calibration Block for Piping Alternate Calibration Block for Piping Calibration Block for Technique One Alternate Calibration Block for Technique One Alternate Calibration Block for Technique One Calibration Block for Technique Two ix 31 37 49 59 62 63 64 65 66 66 67 67 67 67 68 68 72 73 74 75 76 77 78 78 ASME BPVC.V-2015 the nearest 1°C The examples in the table below were created by rounding to the nearest 5°C, with one exception: A-3 Temperature, °F Temperature, °C 70 100 120 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 925 950 1,000 1,050 1,100 1,150 1,200 1,250 1,800 1,900 2,000 2,050 20 38 50 65 95 120 150 175 205 230 260 290 315 345 370 400 425 455 480 495 510 540 565 595 620 650 675 980 040 095 120 the SI value by the factor given to obtain the U.S Customary value In most cases it is appropriate to round the answer to three significant figures U.S Customary SOFT CONVERSION FACTORS The following table of “soft” conversion factors is provided for convenience Multiply the U.S Customary value by the factor given to obtain the SI value Similarly, divide 825 SI Factor in ft in.2 ft2 in.3 ft3 U.S gal U.S gal mm m mm2 m2 mm3 m3 m3 liters 25.4 0.3048 645.16 0.09290304 16,387.064 0.02831685 0.003785412 3.785412 psi MPa (N/mm2) 0.0068948 psi psi ft‐lb kPa bar J 6.894757 0.06894757 1.355818 °F °C °F °C °R lbm lbf K kg N /9 0.4535924 4.448222 in.‐lb ft‐lb N·mm N·m 112.98484 1.3558181 ksi MPa 1.0988434 Btu/hr lb/ft3 W kg/m3 0.2930711 16.018463 /9 × (°F − 32) /9 Notes Used exclusively in equations Used only in text and for nameplate Not for temperature difference For temperature differences only Absolute temperature Use exclusively in equations Use only in text Use for boiler rating and heat transfer INTENTIONALLY LEFT BLANK ASME BPVC.V-2015 ENDNOTES For example, reference to T-270 includes all the rules contained in T-271 through T-277.3 For example, T-233 requires that Image Quality Indicators be manufactured and identified in accordance with the requirements or alternatives allowed in SE-747 or SE-1025, and Appendices, as appropriate for the style of IQI to be used These are the only parts of either SE-747 or SE-1025 that are mandatory in Article SNT-TC-1A, “Personnel Qualification and Certification in Nondestructive Testing;” and ANSI/ASNT CP-189, “ASNT Standard for Qualification and Certification of Nondestructive Testing Personnel;” and ANSI/ASNT CP-105, “ASNT Standard for Qualification of Nondestructive Testing Personnel;” published by the American Society for Nondestructive Testing, 1711 Arlingate Lane, P.O Box 28518, Columbus, OH 43228-0518 In this Code Section, the term “organization” is used generically throughout to refer to a Manufacturer, Fabricator, Installer, Assembler, or other entity responsible for complying with the requirements of this Section in the performance of nondestructive examinations Nondestructive Testing Handbook, Volume I, First Edition, pp 14.32–14.33, “Measuring Focal-Spot Size.” Also, pp 20–21 of Radiography in Modern Industry, Fourth Edition Sketches showing suggested source, film, and IQI placements for pipe or tube welds are illustrated in Article 2, Nonmandatory Appendix A Refer to Article 2, Nonmandatory Appendix D for additional guidance Sample layout and technique details are illustrated in SE-1030, Appendix (Nonmandatory Information) X1, Fig X1.1, Radiographic Standard Shooting Sketch (RSS) See paragraph T-473 for cladding techniques 10 See paragraph T-465, Calibration for Cladding 11 When the Referencing Code Section requires the detection and evaluation of all indications exceeding 20% DAC, the gain should be increased an additional amount so that no calibration reflector indication is less than 40% FSH As an alternate, the scanning sensitivity level may be set at 14 dB higher than the reference level gain setting (This additional gain makes the reference DAC curve a 20% DAC curve so that indications exceeding 20% DAC may be easily identified and evaluated.) 12 Single (fixed angle) is a focal law applied to a specific set of active elements for a constant angle beam, emulating a conventional single element probe 13 E-scan (also termed an electronic raster scan) is a single focal law multiplexed, across a grouping of active elements, for a constant angle beam stepped along the phased array probe length in defined incremental steps 14 S-scan (also called a Sector, Sectorial, or Azimuthal scan) may refer to either the beam movement or the data display (a) Beam movement is the set of focal laws that provides a fan-like series of beams through a defined range of angles using the same set of elements (b) Data display is the two-dimensional view of all A-scans from a specific set of elements corrected for delay and refracted angle Volume-corrected S-scan images typically show a pie-shaped display with defects located at their geometrically correct and measurable positions 15 SE-2491 provides additional information on setting up phased array instruments 16 Focal law is defined as a phased array operational file that defines the search unit elements and their time delays, for both the transmitter and receiver function 17 Linear scanning (also termed line scanning) is defined as a single pass scan of the search unit parallel to the weld axis at a fixed stand-off distance 827 ASME BPVC.V-2015 18 Workmanship based is defined as a standard for acceptance of a weld based on the characterization of imperfections by type (i.e., crack, incomplete fusion, incomplete penetration, or inclusion) and their size (i.e., length) 19 Fracture mechanics based is defined as a standard for acceptance of a weld based on the categorization of imperfections by type (i.e., surface or subsurface) and their size (i.e., length and through-wall height) 20 A flaw need not be surface breaking to be categorized as a surface flaw 21 The methodology contained in Article 4, Mandatory Appendix IX is intended for new construction controlled by the referencing Code Sections When the User specifies Article 4, Mandatory Appendix IX for other uses such as postconstruction examinations, they should consider specifying more than the minimum required three flaws in the qualification weld, requiring specific service-induced flaws, or possibly specifying an Article 14 high rigor type qualification 22 Reflections from concentric cylindrical surfaces such as provided by some IIW blocks and the AWS distance calibration block may be used to adjust delay zero and sweep range for metal path calibration 23 Range has been replaced on many new instruments with velocity 24 The balance of the calibrations in Article 4, Nonmandatory Appendix B is written based upon the use of the indexing strip However, the procedures may be transformed for other methods of measurements at the discretion of the examiner 25 When manually positioning the search unit, a straightedge may be used to guide the search unit while moving to the right and left to assure that axial positioning and beam alignment are maintained 26 Calibration by beam path measurement may be used by range control positioning by the block back reflection to the sweep division number (or multiple) equal to the measured thickness The 1/4T SDH indication must be delay control positioned to 1/4 of the sweep division number 27 Instead of drawing a 20% DAC or 20% reference level on the instrument’s screen, the gain may be increased 14 dB to make the reference level DAC curve the 20% DAC curve or 20% of the reference level 28 The examples shown in Nonmandatory Appendix P are not necessarily typical of all defects due to differences in shape, size, defect orientation, roughness, etc 29 “Bolting” as used in Article is an all-inclusive term for any type of threaded fastener that may be used in a pressure boundary bolted flange joint assembly such as a bolt, stud, studbolt, cap screw, etc 30 The qualification test of Mandatory Appendix IV may be performed by the User, the alternative wavelength light source manufacturer, or the magnetic particle manufacturer 31 System background noise For definition of symbols, see Nonmandatory Appendix A 828 ASME BOILER AND PRESSURE VESSEL CODE SECTION V INTERPRETATIONS Volume 63 Interpretations of the Code have historically been posted in January and July at http://cstools.asme.org/interpretations.cfm Interpretations issued during the previous two calendar years are included with the publication of the applicable Section of the Code in the 2015 Edition Interpretations of Section III, Divisions and and Section III Appendices are included with Subsection NCA Following the 2015 Edition, interpretations will not be included in the edition; they will be issued in real time in ASME's Interpretations Database at http://go.asme.org/Interpretations Historical BPVC interpretations may also be found in the Database Volume 63 is the interpretations volume included with the update service to the 2015 Edition Section I II-A II-B II-C II-D (Customary) II-D (Metric) III-NCA III-3 III-5 IV V VI VII VIII-1 VIII-2 VIII-3 IX X XI XII Vol 63 7/15 7/15 … … 7/15 7/15 7/15 7/15 7/15 7/15 7/15 … … 7/15 7/15 7/15 7/15 7/15 7/15 … Copyright © 2015 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All rights reserved SECTION V — INTERPRETATIONS VOL 63 INTERPRETATIONS VOLUME 63 — SECTION V Replies to Technical Inquiries January 1, 2013 through December 31, 2014 FOREWORD GENERAL INFORMATION This publication includes all written interpretations issued between the indicated dates by the ASME Staff on behalf of the ASME Boiler and Pressure Vessel Committee in response to inquiries concerning interpretations of the ASME Boiler and Pressure Vessel Code A contents is also included that lists subjects specific to the interpretations covered in the individual volume These interpretations are taken verbatim from the original letters, except for a few typographical and editorial corrections made for the purpose of improved clarity In some instances, a review of the interpretation revealed a need for corrections of a technical nature In these cases, a revised interpretation is presented bearing the original interpretation number with the suffix R and the original file number with an asterisk Following these revised interpretations, new interpretations and revisions to them issued during the indicated dates are assigned interpretation numbers in chronological order Interpretations applying to more than one Code Section appear with the interpretations for each affected Section ASME procedures provide for reconsideration of these interpretations when or if additional information is available that the inquirer believes might affect the interpretation Further, persons aggrieved by an interpretation may appeal to the cognizant ASME committee or subcommittee As stated in the Statement of Policy in the Code documents, ASME does not “approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity An interpretation applies either to the Edition and Addenda in effect on the date of issuance of the interpretation or the Edition and Addenda stated in the interpretation Subsequent revisions to the Code may supersede the interpretation For detailed instructions, see "Submittal of Technical Inquiries to the ASME Boiler and Pressure Vessel Standards Committees" in the front matter SUBJECT AND NUMERICAL INDEXES Subject and numerical indexes (if applicable) have been prepared to assist the user in locating interpretations by subject matter or by location in the Code They cover interpretations issued from Volume 12 up to and including the present volume 231 SECTION V — INTERPRETATIONS VOL 63 Subject Interpretation Article 2, T-262.1(a), Densitometer and Step Wedge Calibration Film (2010 Edition With the 2011 Addenda) Article 2, T-271.2(a) and T-274.2 Article 2, T-273 (1971 Edition, Summer 1971 Addenda) Article 2, T-281 and T-275 (2010 Edition With the 2011 Addenda) Article 2, T-282 (2010 Edition) Article 4, Index Offsets for Ultrasonic Scan Plans Article 4, Mandatory Appendix VIII, VIII-434.2.4, and Mandatory Appendix IX, IX-435.2 Article 4, Phased Array Ultrasonic Scan Plans Article 4, T-434.5.1(b) Article 4, T-434.5.1(e) and Figure T-434.5.1 V-13-07 V-13-04 V-13-09 V-13-08 V-10-09 V-13-05 V-13-01 V-13-06 V-13-02 V-13-03 232 File No 13-498 12-983 14-318 13-581 11-2175 12-1439 12-947 12-1442 12-949 12-952 SECTION V — INTERPRETATIONS VOL 63 Interpretation: V-10-09 Subject: Article 2, T-282 (2010 Edition) Date Issued: August 22, 2012 File: 11-2175 Question: Is it a requirement of Article 2, T-290, to document the actual film density values for a radiograph? Reply: No NOTE: This interpretation was inadvertently omitted from Vol 62 of the interpretations Interpretation: V-13-01 Subject: Article 4, Mandatory Appendix VIII, VIII-434.2.4, and Mandatory Appendix IX, IX-435.2 Date Issued: April 9, 2013 File: 12-947 Question: Is the Manufacturer responsible for preparation of the demonstration blocks specified in IX-435.2 of Mandatory Appendix IX including the fabrication of the scanner block per VIII-434.2.4 of Mandatory Appendix VIII? Reply: The Manufacturer is responsible to ensure preparation of needed demonstration and scanner blocks Article does not specify who is responsible for actual fabrication of blocks Interpretation: V-13-02 Subject: Article 4, T-434.5.1(b) Date Issued: April 9, 2013 File: 12-949 Question: Is it a requirement of T-434.5.1(b) that nozzle calibration blocks can be used only for the specific nozzle wall thickness, T , for which they were fabricated? Reply: No See T-434.5.1(e) Interpretation: V-13-03 Subject: Article 4, T-434.5.1(e) and Figure T-434.5.1 Date Issued: April 9, 2013 File: 12-952 Question: May a calibration block fabricated per Figure T-434.5.1 for a nozzle wall thickness, T , of 30 mm (13/16 in.) be used as an alternative calibration block, per T-434.5.1(e), for a nozzle wall thickness of 24 mm (15/16 in.) up to 36 mm (17/16 in.)? Reply: Yes, provided the side-drilled hole(s) is (are) the same or a smaller diameter than what is required 233 SECTION V — INTERPRETATIONS VOL 63 Interpretation: V-13-04 Subject: Article 2, T-271.2(a) and T-274.2 Date Issued: April 9, 2013 File: 12-983 Question: Are the recommended geometric unsharpness, U g , values listed in T-274.2 applicable to both single-wall and double-wall radiographic techniques? Reply: Yes Interpretation: V-13-05 Subject: Article 4, Index Offsets for Ultrasonic Scan Plans Date Issued: April 9, 2013 File: 12-1439 Background: Tables VII-421 and VIII-421 of Mandatory Appendices VII and VIII, respectively, list the scan plan as an essential variable for both the written procedure and procedure qualification Question: If an examination is being performed in accordance with Article 4, Mandatory Appendix VII or VIII and the written procedure’s qualified scan plan requires a change to an essential variable such as different search unit stand-off distances from the weld centerline than stated or an increase or decrease in the number of search units beyond those listed, is requalification required? Reply: Yes Interpretation: V-13-06 Subject: Article 4, Phased Array Ultrasonic Scan Plans Date Issued: April 9, 2013 File: 12-1442 Background: Paragraph T-421.2 states that when procedure qualification is a requirement, a change of a requirement of Table T-421 from its specified value or range of values requires requalification of the written procedure Question (1): Does Article specify which requirements listed in Table T-421 must be stated in a written procedure as a single value or as a range of values? Reply (1): No Question (2): Does a written procedure, requiring procedure qualification, require requalification when any essential variable, whether listed as a single value or range of values, is changed? Reply (2): Yes 234 SECTION V — INTERPRETATIONS VOL 63 Interpretation: V-13-07 Subject: Article 2, T-262.1(a), Densitometer and Step Wedge Calibration Film (2010 Edition With the 2011 Addenda) Date Issued: October 14, 2013 File: 13-498 Question (1): May a step wedge calibration film be used without verification for more than yr beyond opening when it is still within the manufacturer's stated shelf life? Reply (1): No Question (2): May a step wedge calibration film be used beyond the manufacturer's stated shelf life when it has been verified? Reply (2): Yes Interpretation: V-13-08 Subject: Article 2, T-281 and T-275 (2010 Edition With the 2011 Addenda) Date Issued: October 14, 2013 File: 13-581 Question (1): May statistical methods be used to determine if a radiograph is free from mechanical, chemical, or other blemishes that could mask or be confused with the image of a discontinuity in the area of interest of the object being radiographed? Reply (1): Article does not address the use of statistical methodology Question (2): Do location markers determine the limits of the area of interest? Reply (2): No Interpretation: V-13-09 Subject: Article 2, T-273 (1971 Edition, Summer 1971 Addenda) Date Issued: June 24, 2014 File: 14-318 Question: Per the requirements of T-273 for double-wall radiography of welds 31/2 in or less in outside diameter, is it acceptable to radiograph a weld using a combination of both the offset method and the superimposed method, provided 100% coverage of the weld is demonstrated? 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