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ICS 25.160.40

Zerstrungsfreie Prfung von Schweiverbindungen Ultraschallprfung von Schweiverbindungen Zulssigkeitsgrenzen (enthlt nderung A1 : 2002)

European Standard EN 1712 : 1997 + Amendment A1 : 2002 has the status of a

DIN Standard.

A comma is used as the decimal marker.

National foreword

This standard has been prepared by CEN/TC 121 Welding (Secretariat: Denmark), SC 5 Non-destructivetests of welds.

The responsible German body involved in its preparation was the Normenausschuss Materialprfung(Materials Testing Standards Committee), Technical Committee Ultraschallprfung.

Amendments

This standard differs from the September 1997 edition in that it has been editorially revised and Annex ZAhas been included.

Previous edition

DIN EN 1712: 1997-09.

Ref . No. DIN EN 1712 : 2002-09English pr ice group 08 Sales No.1108

01.03

DEUTSCHE NORM September 2002

EN 1712{

Continued overleaf.

EN comprises 13 pages.

No part of this standard may be reproduced without the prior permission ofDIN Deutsches Institut fr Normung e.V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen) .

Non-destructive testing of weldsUltrasonic testing of welded joints

Acceptance levels(includes Amendment A1 : 2002)

English version of DIN EN 1712 : 1997 + A1 : 2002

SupersedesSeptember 1997 edition.

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English version

ICS 25.160.40Descriptors:

Non-destructive testing of welds

Ultrasonic testing of welded jointsAcceptance levels

(includes Amendment A1 : 2002)

2002. CEN All rights of exploitation in any form and by any meansreserved worldwide for CEN national members.

Ref. No. EN 1712: 1997 + A1 : 2002 E

Zerstrungsfreie Prfung vonSchweiverbindungen Ultraschall-prfung von Schweiverbindungen Zulssigkeitsgrenzen(enthlt nderung A1 : 2002)

This European Standard was approved by CEN on 1997-07-24 and AmendmentA1 on 2002-05-01.

CEN members are bound to comply with the CEN/CENELEC Internal Regulationswhich stipulate 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 national stand-ards may be obtained on application to the Management Centre or to anyCEN member.

The European Standards exist in three off icial versions (English, French, German).A version in any other language made by translation under the responsibility of aCEN member into its own language and notified to the Management Centre hasthe same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, the CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,Luxembourg, Malta, the Netherlands, Norway, Portugal, Spain, Sweden,Switzerland, and the United Kingdom.

EN 1712September 1997

Management Centre: rue de Stassart 36, B-1050 Brussels

European Committee for Standardization

Comit Europen de Normalisation

Europisches Komitee fr Normung

|

Contrle non destructif desassemblages souds Contrlepar ultrasons des assemblagessouds Niveaux dacceptation(amendement A1 : 2002 inclus)

+ A1May 2002

Supersedes EN 1712 : 1997.

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Page 2EN 1712 : 1997 + A1 : 2002

Contents

Page

Foreword to EN 1712 : 1997 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Foreword to EN 1712 : 1997/A1 : 2002 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Normative references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3 Evaluations of indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3.2 Sensitivity setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.3 Reference level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.4 Evaluation level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.5 Recording level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.6 Measurement of indication length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Acceptance levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4.2 Longitudinal indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4.3 Transverse indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4.4 Indications detected by the tandem technique . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64.5 Linearly aligned and grouped indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.6 Cumulative length of acceptable indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

5 Examination report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Annex A (informative) Acceptance levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Annex B (normative) Fixed amplitude level technique . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Annex ZA (informative) Clauses of this European Standard addressing essential requirementsor other provisions of EU directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Foreword to EN 1712 : 1997

This European Standard has been prepared by Technical Committee CEN/TC 121 Welding, the Secretariat ofwhich is held by DS.

This European Standard has been prepared under a mandate given to CEN by the European Commission andthe European Free Trade Association, and supports essential requirements of the relevant EU Directives.

This European Standard shall be given the status of a national standard, either by publication of an identical textor by endorsement, and conflicting national standards withdrawn, by February 1998 at the latest.

In accordance with the CEN/CENELEC Internal Regulations, the national standards organizations of thefollowing countries are bound to implement this European Standard:

Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom.

Foreword to EN 1712 : 1997/A1 : 2002This amendment to EN 1712 : 1997 has been prepared by Technical Committee CEN/TC 121 Welding, theSecretariat of which is held by DS.

This amendment has been prepared under a mandate given to CEN by the European Commission and theEuropean Free Trade Association, and supports essential requirements of the relevant EU Directives.

For relationship with these directives, see Annex ZA.

This amendment shall be given the status of a national standard, either by publication of an identical text or byendorsement, and conflicting national standards withdrawn, by November 2002 at the latest.

In accordance with the CEN/CENELEC Internal Regulations, the national standards organizations of thefollowing countries are bound to implement this European Standard:

Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,Luxembourg, Malta, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom.

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Page 3EN 1712 : 1997 + A1 : 2002

This European Standard specifies ultrasonic acceptance levels, 2 and 3, for full penetration

welded joints in ferritic steels, which correspond to quality levels B and C of EN 25817. Other

acceptance levels can be used by specification.

An acceptance level corresponding to level D of EN 25817 has not been included in this standard

as ultrasonic testing is not recommended for this weld quality.

These acceptance levels are applicable to testing carried out in accordance with the standards

referred to in EN 12062. They can, however, be applied in conjunction with other rules, where the

same types of reference reflectors for sensitivity setting are used, provided it is agreed between

the contracting parties.

The standard is applicable to the testing of full penetration ferritic steel welds, with thicknesses

from 8 mm up to 100 mm. It can also be used for other types of welds, materials and thicknesses

above 100 mm, provided the testings have been performed with necessary consideration of the

geometry and acoustical properties of the component and an adequate sensitivity can be

employed to enable the acceptance levels of this standard to be applied. The nominal frequencyof probes used in this European Standard is between 2 MHz and 5 MHz unless attenuation or

requirements for higher resolution call for another frequency. The use of these acceptance levels

in conjunction with frequencies outside this range needs to be considered carefully.

The evaluation of indications shall be performed on indications detected by testing performed in

accordance with EN 1714.

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The acceptance levels shall be related to the testing techniques (testing levels) as defined in

EN 1714. Acceptance level 2 will normally require at least testing level B, and for acceptance

level 3 at least testing level A. Any other relationship between acceptance levels and testing

levels shall be defined by specification.

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Evaluation of indications may include discrimination between different types of discontinuity if

defined in a specification. In such case, the characterisation as a planar indication may be used as

the primary discrimination of an acceptable or rejectable indication. In this case all indications with

echo amplitude above the evaluation level shall be characterised, and all that are characterised as

planar shall be rejected.

For welds subject to fatigue loading, near surface acceptance levels may be defined in a

specification.

The acceptability of indications detected by the tandem technique is to be defined by

specification.

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