1、AWS A2.4:2007An American National StandardStandard Symbolsfor Welding,Brazing, andNondestructiveExaminationCopyright American Welding Society Provided by IHS under license with AWS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-550 N.W. LeJeune Road, Miami, FL 331
2、26AWS A2.4:2007An American National StandardApproved by theAmerican National Standards InstituteMarch 23, 2007Standard Symbols forWelding, Brazing, andNondestructive Examination6th EditionSupersedes ANSI/AWS A2.4-98Prepared by theAmerican Welding Society (AWS) A2 Committee on Definitions and Symbols
3、Under the Direction of theAWS Technical Activities CommitteeApproved by theAWS Board of DirectorsAbstractThis standard establishes a method for specifying certain welding, brazing, and nondestructive examination informationby means of symbols. Detailed information and examples are provided for the c
4、onstruction and interpretation of thesesymbols. This system provides a means of specifying welding or brazing operations as well as nondestructive examina-tion, including the examination method, frequency, and extent.Copyright American Welding Society Provided by IHS under license with AWS Not for R
5、esaleNo reproduction or networking permitted without license from IHS-,-,-iiAWS A2.4:2007International Standard Book Number: 978-0-87171-026-0American Welding Society550 N.W. LeJeune Road, Miami, FL 33126 2007 by American Welding Society All rights reservedPrinted in the United States of AmericaPhot
6、ocopy Rights. No portion of this standard may be reproduced, stored in a retrieval system, or transmitted in anyform, including mechanical, photocopying, recording, or otherwise, without the prior written permission of the copyrightowner.Authorization to photocopy items for internal, personal, or ed
7、ucational classroom use only or the internal, personal, oreducational classroom use only of specific clients is granted by the American Welding Society provided that the appropriatefee is paid to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, tel: (978) 750-8400; Internet:.Co
8、pyright American Welding Society Provided by IHS under license with AWS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-iiiAWS A2.4:2007Statement on the Use of American Welding Society StandardsAll standards (codes, specifications, recommended practices, methods, c
9、lassifications, and guides) of the AmericanWelding Society (AWS) are voluntary consensus standards that have been developed in accordance with the rules of theAmerican National Standards Institute (ANSI). When AWS American National Standards are either incorporated in, ormade part of, documents that
10、 are included in federal or state laws and regulations, or the regulations of other govern-mental bodies, their provisions carry the full legal authority of the statute. In such cases, any changes in those AWSstandards must be approved by the governmental body having statutory jurisdiction before th
11、ey can become a part ofthose laws and regulations. In all cases, these standards carry the full legal authority of the contract or other documentthat invokes the AWS standards. Where this contractual relationship exists, changes in or deviations from requirementsof an AWS standard must be by agreeme
12、nt between the contracting parties.AWS American National Standards are developed through a consensus standards development process that bringstogether volunteers representing varied viewpoints and interests to achieve consensus. While AWS administers the processand establishes rules to promote fairn
13、ess in the development of consensus, it does not independently test, evaluate, orverify the accuracy of any information or the soundness of any judgments contained in its standards.AWS disclaims liability for any injury to persons or to property, or other damages of any nature whatsoever, whetherspe
14、cial, indirect, consequential or compensatory, directly or indirectly resulting from the publication, use of, or relianceon this standard. AWS also makes no guaranty or warranty as to the accuracy or completeness of any informationpublished herein.In issuing and making this standard available, AWS i
15、s neither undertaking to render professional or other services for oron behalf of any person or entity, nor is AWS undertaking to perform any duty owed by any person or entity to someoneelse. Anyone using these documents should rely on his or her own independent judgment or, as appropriate, seek the
16、advice of a competent professional in determining the exercise of reasonable care in any given circumstances.This standard may be superseded by the issuance of new editions. Users should ensure that they have the latest edition.Publication of this standard does not authorize infringement of any pate
17、nt or trade name. Users of this standard acceptany and all liabilities for infringement of any patent or trade name items. AWS disclaims liability for the infringement ofany patent or product trade name resulting from the use of this standard.Finally, AWS does not monitor, police, or enforce complia
18、nce with this standard, nor does it have the power to do so.On occasion, text, tables, or figures are printed incorrectly, constituting errata. Such errata, when discovered, are postedon the AWS web page (www.aws.org).Official interpretations of any of the technical requirements of this standard may
19、 only be obtained by sending a request,in writing, to the appropriate technical committee. Such requests should be addressed to the American Welding Society,Attention: Managing Director, Technical Services Division, 550 N.W. LeJeune Road, Miami, FL 33126 (see Annex F).With regard to technical inquir
20、ies made concerning AWS standards, oral opinions on AWS standards may be rendered.These opinions are offered solely as a convenience to users of this standard, and they do not constitute professionaladvice. Such opinions represent only the personal opinions of the particular individuals giving them.
21、 These individualsdo not speak on behalf of AWS, nor do these oral opinions constitute official or unofficial opinions or interpretations ofAWS. In addition, oral opinions are informal and should not be used as a substitute for an official interpretation.This standard is subject to revision at any t
22、ime by the AWS A2 Committee on Definitions and Symbols. It must bereviewed every five years, and if not revised, it must be either reaffirmed or withdrawn. Comments (recommendations,additions, or deletions) and any pertinent data that may be of use in improving this standard are required and should
23、beaddressed to AWS Headquarters. Such comments will receive careful consideration by the AWS A2 Committee onDefinitions and Symbols and the author of the comments will be informed of the Committees response to thecomments. Guests are invited to attend all meetings of the AWS A2 Committee on Definiti
24、ons and Symbols to expresstheir comments verbally. Procedures for appeal of an adverse decision concerning all such comments are provided inthe Rules of Operation of the Technical Activities Committee. A copy of these Rules can be obtained from the AmericanWelding Society, 550 N.W. LeJeune Road, Mia
25、mi, FL 33126.Copyright American Welding Society Provided by IHS under license with AWS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-This page is intentionally blank.ivAWS A2.4:2007Copyright American Welding Society Provided by IHS under license with AWS Not for
26、ResaleNo reproduction or networking permitted without license from IHS-,-,-vAWS A2.4:2007DedicationThis revision of AWS A2.4, Standard Symbols for Welding,Brazing, and Nondestructive Examination, is respectfullydedicated to the memory of William Lee “Bill” Green, whoserved as the A2 and A2C Committe
27、e chair for many years.The Committee sadly misses his leadership, wisdom, andfriendship. His commitment to the advancement of symbolsfor welding, brazing, and nondestructive examination liveson in this new revision.Godspeed, Bill Green.Copyright American Welding Society Provided by IHS under license
28、 with AWS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-This page is intentionally blank.viAWS A2.4:2007Copyright American Welding Society Provided by IHS under license with AWS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-vi
29、iAWS A2.4:2007PersonnelAWS A2 Committee on Definitions and SymbolsR. D. McGuire, ChairNational Board of Boiler & Pressure Vessel InspectorsB. B. Grimmett, Vice ChairBabcock & Wilcox CompanyS. Morales, SecretaryAmerican Welding SocietyL. J. BarleyAiSpringfieldD. M. BeneteauCenterLine (Windsor) Ltd.J.
30、 P. ChristeinNorthrop Grumman Newport NewsC. K. FordHobart InstituteB. GalliersLinde Gas, LLCJ. J. GullottiGeneral Dynamics Electric BoatR. L. HoldrenApplications Technologies Company, LLCP. NewhouseCanadian Welding BureauR. L. PeasleeWall Colmonoy CorporationW. F. QuallsConsultantL. J. SiyConsultan
31、tJ. L. WarrenCNH America LLCB. D. WorleyUnison Elano DivisionAdvisors to the A2 Committee on Definitions and SymbolsG. B. CoatesGeneral Dynamics Armaments & Technical ProductsJ. E. GreerMoraine Valley CollegeJ. G. GuentherPlant SuperintendentA. J. KathrensCanadian Welding Bureau (Retired)AWS A2C Sub
32、committee on SymbolsJ. P. Christein, ChairNorthrop Grumman Newport NewsJ. J. Gullotti, Vice ChairGeneral Dynamics Electric BoatS. Morales, SecretaryAmerican Welding SocietyC. K. FordHobart InstituteR. D. McGuireNational Board of Boiler & Pressure Vessel InspectorsP. NewhouseCanadian Welding BureauL.
33、 J. SiyConsultantJ. L. WarrenCNH America LLCAdvisors to the A2C Subcommittee on SymbolsL. J. BarleyAiSpringfieldD. M. BeneteauCenterLine (Windsor) Ltd.G. B. CoatesGeneral Dynamics Armaments &Technical ProductsB. GalliersLinde Gas, LLCJ. G. GuentherPlant SuperintendentR. L. HoldrenApplications Techno
34、logies Company, LLCA. J. KathrensCanadian Welding Bureau (Retired)R. L. PeasleeWall Colmonoy CorporationB. D. WorleyUnison Elano DivisionCopyright American Welding Society Provided by IHS under license with AWS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-This p
35、age is intentionally blank.viiiAWS A2.4:2007Copyright American Welding Society Provided by IHS under license with AWS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ixAWS A2.4:2007ForewordThis foreword is not part of AWS A2.4:2007, Standard Symbols for Welding, Br
36、azing,and Nondestructive Examination, but is included for informational purposes only.Joining processes and examination methods cannot take their proper place as fabricating tools unless means are providedfor conveying information from the designer to joining and inspection personnel. The symbols in
37、 this publication areintended to be used to facilitate communication among the designer, fabrication, and inspection personnel. Statementssuch as “to be welded throughout” or “to be completely welded,” in effect, transfer the design responsibility from thedesigner to production personnel, who cannot
38、 be expected to know design requirements.The symbols presented in this standard provide the means for placing welding, brazing, and nondestructive examinationinformation on drawings. In practice, many users will need only a few of the symbols, and, if they desire, can select onlythe parts of the sys
39、tem that fit their needs.The publication AWS A2.4 came into existence in 1976 as a result of combining and superseding two earlier documents,A2.0, Standard Welding Symbols, and A2.2, Nondestructive Testing Symbols. Both of these early documents had theirorigins in work done jointly by the American W
40、elding Society and the American Standards Association (ASA)Sectional Committee Y32. AWS A2.0 was first published in 1947 and was revised in 1958 and 1968. AWS A2.2 firstappeared in 1958 and was revised in 1969.AWS A2.4-76, Symbols for Welding and Nondestructive Testing, was the first revision of the
41、 combined documents andwas prepared by the AWS Committee on Definitions and Symbols. It was revised in 1979 as A2.4-79, Symbols forWelding and Nondestructive Testing, Including Brazing, and again in 1986 with the title Standard Symbols for Welding,Brazing, and Nondestructive Examination. AWS A2.4:19
42、98 was the second revision of the 1986 document and had thesame title. AWS A2.4:2007 is the third revision of the 1986 document and has the same title, Standard Symbols forWelding, Brazing, and Nondestructive Examination.This edition has undergone extensive formatting modifications which have introd
43、uced new features including a scope,normative and informative references, and figures located closer to the referencing clauses. The user will also find para-graphs on SI dimensions for application to symbols and many examples of metric dimensions in the figures. One norma-tive annex, titled Annex A
44、 Tables, has also been added to the current edition in order to facilitate locating tablereferences with the addition of Table A.6 Examination Method Letter Designation. Six informative annexes follow thetext and figures that comprise AWS A2.4:2007. Among the informative annexes the user will find A
45、nnex E WeldingSymbol Chart in its updated form, including a section for contour symbols, and Annex F Guidelines for the Preparationof Inquiries for AWS Technical Committees.The seventh edition of A2.4 also incorporates some revised technical content primarily in the Brazing Symbols areawhich current
46、ly details information on special application of symbols as well as braze fillet. Clause 3. Basic WeldingSymbols briefly defines the basis of reference in a new subclause and is also revised to clarify Figures 1 through 3.Several of the sketches throughout the standard have been corrected and modifi
47、ed, such as those found in 5.12.2, 6.2.1,10.6.2, and 11.7.2. Figures 30, 33, 41, and 49 were also altered in order to better portray the application of the plug weldsymbol.Comments and suggestions for the improvement of this standard are welcome. They should be sent to the Secretary,AWS A2 Committee
48、 on Definitions and Symbols, American Welding Society, 550 N.W. LeJeune Road, Miami, FL 33126.Copyright American Welding Society Provided by IHS under license with AWS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-This page is intentionally blank.xAWS A2.4:2007Co
49、pyright American Welding Society Provided by IHS under license with AWS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-xiAWS A2.4:2007Table of ContentsPage No.Dedication .vPersonnel.viiForeword.ixList of Tables .xivList of Figures.xiv1. Scope.12. Normative Referen
50、ces.13. Basic Welding Symbols.13.1Distinction between Weld Symbol and Welding Symbol.13.2Basis of Reference.13.3Weld Symbols .13.4Supplementary Welding Symbols.23.5Welding Symbols .23.6Placement of the Welding Symbol.23.7Illustrations.24. Joint Types.45. General Provisions for Welding Symbols .55.1L
