BS EN 875-DESTRUCTIVE TEST.pdf

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BRITISH STANDARD BS EN875: 1995

Destructive tests onwelds in metallic

materials

Impact tests

Test specimen location,

notch orientation and

examination

The European Standard EN 875:1995 has the status of aBritish Standard

ICS 25.160.40

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BS EN 875:1995

This British Standard, havingbeen prepared under thedirection of the EngineeringSector Board, was publishedunder the authority of theStandards Board and comesinto effect on15 December 1995

BSI 03-1999

The following BSI referencesrelate to the work on thisstandard:Committee reference WEE/2Draft for comment 92/82867 DC

ISBN 0 580 25311 2

Committees responsible for thisBritish Standard

The preparation of this British Standard was entrusted to Technical

Committee WEE/2, Welding tests, upon which the following bodies wererepresented:

Aluminium FederationAssociation of Consulting ScientistsBritish Constructional Steelwork Association Ltd.British Iron and Steel Producers AssociationElectricity AssociationHealth and Safety ExecutiveInstitution of Structural EngineersLloyds Register of Shipping

Ministry of DefencePower Generation Contractors Assocition [PGCA (BEAMA Ltd.)]TWIWelding Manufacturers Association (BEAMA Ltd.)

Amendments issued since publication

Amd. No. Date Comments



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Contents

PageCommittees responsible Inside front cover

National foreword iiForeword 2Text of EN 875 3List of references Inside back cover



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National foreword

This British Standard has been prepared by Technical Committee WEE/2 and isthe English language version of EN 875:1995Destructive tests on welds inmetallic materials Impact tests Test specimen location, notch orientation and

examinationpublished by the European Committee for Standardization (CEN).EN 875 was produced as a result of international discussions in which theUnited Kingdom took an active part.BS EN 875:1995 supersedes tests detailed in BS 709:1983 which have beendeleted by amendment.

A British Standard does not purport to include all the necessary provisions of acontract. Users of British Standards are responsible for their correct application.

Compliance with a British Standard does not of itself confer immunityfrom legal obligations.

Cross-references

Publication referred to Corresponding British Standard

EN 10045-1 BS EN 10045 Charpy impact tests on metallic materialsPart 1:1990 Test method (V- and U- notches)

Summary of pages

This document comprises a front cover, an inside front cover, pages i and ii,

the EN title page, pages 2 to 10, an inside back cover and a back cover.This standard has been updated (see copyright date) and may have hadamendments incorporated. This will be indicated in the amendment table onthe inside front cover.



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EUROPEAN STANDARD

NORME EUROPENNE

EUROPISCHE NORM

EN 875

August 1995

ICS 25.160.40

Descriptors: Welding, welded joints, butt joints, metals, destructive tests, bend tests, impact tests, notch strength, designation

English version

Destructive tests on welds in metallic materials Impacttests Test specimen location, notch orientation and

examination

Essais destructifs des soudures sur matriauxmtalliques Essai de flexion par choc Position de lprouvette, orientation delentaille et examen

Zerstrende Prfung vonSchweiverbindungen an metallischenWerkstoffen Kerbschlagbiegeversuch Probenlage, Kerbrichtung und Beurteilung

This European Standard was approved by CEN on 1995-07-01. CEN membersare bound to comply with the CEN/CENELEC Internal Regulations whichstipulate the conditions for giving this European Standard the status of a

national standard without any alteration.Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to anyCEN member.This European Standard exists in three official versions (English, French,German). A version in any other language made by translation under theresponsibility of a CEN member into its own language and notified to theCentral Secretariat has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium,Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland andUnited Kingdom.

CEN

European Committee for StandardizationComit Europen de NormalisationEuropisches Komitee fr Normung

Central Secretariat: rue de Stassart 36, B-1050 Brussels

1995 Copyright reserved to CEN membersRef. No. EN 875:1995 E



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Foreword

This European Standard has been prepared byTechnical Committee CEN/TC 121, Welding, ofwhich the secretariat is held by DS.This European Standard shall be given the status ofa national standard, either by publication of anidentical text or by endorsement, at the latest byFebruary 1996, and conflicting national standardsshall be withdrawn at the latest by February 1996.According to the CEN/CENELEC InternalRegulations, the following counries are bound toimplement this European Standard: Austria,Belgium, Denmark, Finland, France, Germany,Greece, Iceland, Ireland, Italy, Luxembourg,Netherlands, Norway, Portugal, Spain, Sweden,Switzerland and the United Kingdom.

Contents

PageForeword 21 Scope 32 Normative reference 33 Principle 34 Method of denomination 34.1 Lettering system 34.2 Characters 34.3 Additional information 35 Examples of denomination 36 Examination 37 Test report 4Annex A (informative) Test report 9Figure 1 Typical examplesof denominations 8Table 1 Notched face parallel to thesurface of the test piece (S position) 5Table 2 Notched face perpendicular tothe surface of the test piece (T position) 6Table A.1 Impact test in accordancewith EN 875 9



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EN 875:1995

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1 Scope

This standard specifies mainly the method to beused when describing test specimen location andnotch orientation for the testing and reporting ofimpact tests on welded butt joints.This standard applies to impact tests on metallicmaterials in all forms of product made by any fusionwelding process.It is used in addition to EN 10045-1 and includestest specimen denomination and additionalreporting requirements.

2 Normative reference

This European Standard incorporates by dated orundated reference, provisions from otherpublications. These normative references are citedat the appropriate places in the text and thepublications are listed hereafter. For datedreferences, subsequent amendments to or revisionsof any of these publications apply to this EuropeanStandard only when incorporated in it byamendment or revision. For undated references thelatest edition of the publication referred to applies.EN 10045-1, Metallic materials Charpy impacttest Part 1: Test method.

3 PrincipleImpact testing shall be in accordance withEN 10045-1. The test temperature, location, typeand size of test specimen, and notch orientationshall be in accordance with the relevant applicationstandard.In addition to the requirements of EN 10045-1, thenotch position may be located by macroetching.

4 Method of denomination

4.1 Lettering system

The denomination is based on a lettering system to

describe the type, location and notch orientationand a numbering system to show the distance (inmillimetres) of the notch from reference lines (RL).The method of denomination is shown in Table 1and Table 2. The test specimen shall be taken fromthe welded joint such that its longitudinal axis is atright angles to the weld length.

4.2 Characters

The denomination comprises the following

characters:

4.3 Additional information

In cases where this simple denomination does notsufficiently define the location or notch orientation,a sketch referring to the weld procedure should beprovided.

5 Examples of denomination

Examples of denominations are given in Table 1 andTable 2 and Figure 1.

6 Examination

The test specimens designated by this standardshall be tested in accordance with EN 10045-1.

1st character U: Charpy U notch,V: Charpy V notch;

2nd character W: notch in the weld metal; thereference line is the centre line ofthe weld at the position of thetest specimen,H: notch in the heat affected zone;the reference line is the fusion orthe joint line (notch will includeHAZ);

3rd character S: notched face parallel to thesurfacea,T: notch through the thickness;

4th character a: the distance of the centre of thenotch from the reference line (if ais at the centre line of the weld, a= 0 which should be recorded);

5th character b: the distance from the weldjoint face sidebto the nearer faceof the test specimen (if b is at thesurface of the weld, b = 0 whichshould be recorded).

a

This orientation is equivalent to the denomination surfacenotch used in fracture mechanics testing.b In the case of double V, K or similar welds, the face side is theside which contains the larger width of the weld or from whichthe welding energy was first applied.



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7 Test report

The test report shall include the followinginformation in addition to that given in EN 10045-1:

reference to this standard; test specimen denomination; sketch if required; type and dimensions of imperfectionsobserved; other information as required by theapplication standard and/or by agreementbetween the contracting parties.

An example of a typical test report is givenin Annex A.



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Table 1 Notched face parallel to the surface of the test piece (S position)

Reference Centre of the weld Reference Fusion/joint line

Denomination Representation Denomination Representation

VWS a/b VHS a/b(pressure weld)

VHS a/b(Fusion weld)


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Table 2 Notched face perpendicular to the surface of the test piece (T position)



VWT O/b VHT O/b

VWT a/b VHT a/b


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Table 2 Notched face perpendicular to the surface of the test piece (T position)



VWT O/b VHT a/b

VWT a/b VHT a/b


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Figure 1 Typical examples of denominations



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Annex A (informative)Test report

Table A.1 Impact test in accordance with EN 875

Testspecimen

Denomination Type anddimension

Testtemperature

Impacttoughness

Impactabsorbed

energy

Remark

No. mm C J/cm2 J Locationof

fracturea

Type of

fractureaType and size

ofimperfection

a if required

Examiner or examining body Certified by:



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List of references

See national foreword.



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