prEN 12799

Brazing - Non-destructive examination of brazed joints

This European Standard describes non-destructive examination procedures and test piece types necessary to perform the tests on brazed joints.
The non-destructive examination methods described are as follows:
a)   visual examination (see Clause 4);
b)   ultrasonic examination (see Clause 5);
c)   radiographic examination (see Clause 6);
d)   penetrant examination (see Clause 7);
e)   leak testing (see Clause 8);
f)   proof testing (see Clause 9);
g)   thermography (see Clause 10).
The brazed joints to which these tests are applied can either be test samples manufactured to obtain brazed joint design data, or manufactured as part of the approval testing of a brazing procedure, or parts of a brazed assembly. The type of test piece described for each test can be quoted or incorporated in engineering application standards that deal with brazed assemblies.
This European Standard does not recommend the number of samples to be tested or the repeat tests allowed. Neither does it specify methods of sampling brazed joints, except to give guidance regarding the precautions necessary, nor does it comment on the acceptance criteria applicable to any of the tests. No attempt is made to define which test or tests, if any, should be applied in any situation. This is a matter to be established before any particular method of test is selected.
The methods of non-destructive examination are not associated with any particular type of brazed assembly but lay down the general principles of the types of testing described. It is emphasized that a satisfactory examination method can only be developed and used after taking into account all the relevant factors regarding the equipment to be used and the characteristics of the test piece being examined.

Hartlöten - Zerstörungsfreie Prüfung von Hartlötverbindungen

Diese Europäische Norm beschreibt zerstörungsfreie Prüfverfahren und Prüfstückarten, die zur Durchführung von Prüfungen an Hartlötverbindungen notwendig sind.
Die folgenden zerstörungsfreien Prüfverfahren werden beschrieben:
a) Sichtprüfung (siehe Abschnitt 4);
b) Ultraschallprüfung (siehe Abschnitt 5);
c) Durchstrahlungsprüfung (siehe Abschnitt 6);
d) Eindringprüfung (siehe Abschnitt 7);
e) Dichtheitsprüfung (siehe Abschnitt 8);
f) Überdruckprüfung (siehe Abschnitt 9);
g) Thermographie (siehe Abschnitt 10).
Die Hartlötverbindungen, an denen diese Prüfungen durchgeführt werden, können entweder Proben, die hergestellt wurden, um für Hartlötverbindungen Konstruktionsdaten zu ermitteln, Proben, die im Rahmen der Abnahmeprüfung eines Hartlötverfahrens hergestellt wurden, oder Teil einer hartgelöteten Baugruppe sein. Die Art des Prüfstücks, das für jede Prüfung beschrieben wird, kann angeführt oder in die technischen Anwendungsnormen, die hartgelötete Baugruppen behandeln, aufgenommen werden.
Diese Europäische Norm empfiehlt nicht die Anzahl der zu untersuchenden Prüfstücke oder der zulässigen Wiederholungsprüfungen. Sie legt bis auf einen aufgeführten Leitfaden bezüglich der notwendigen Vorsichtsmaßnahmen weder die Verfahren der Probenahme aus den Hartlötverbindungen fest, noch erläutert sie die Bewertungsmerkmale (Abnahmekriterien), die für jede der Prüfungen gelten. Es wurde nicht versucht festzulegen, welche Prüfung bzw. Prüfungen in welcher Situation angewendet werden sollte(n). Dies ist zu vereinbaren, bevor ein spezielles Prüfverfahren ausgewählt wird.
Die Verfahren der zerstörungsfreien Prüfung sind nicht mit einer bestimmten Art hartgelöteter Baugruppen verbunden, sie legen jedoch die allgemeinen Grundsätze der beschriebenen Prüfungsarten fest. Es wird hervorgehoben, dass ein zufriedenstellendes Prüfverfahren nur dann entwickelt und angewendet werden kann, wenn alle entscheidenden Faktoren bezüglich der zu verwendenden Ausrüstung und der Eigenschaften des zu untersuchenden Prüfstücks berücksichtigt wurden.

Brasage fort - Contrôles non destructifs des assemblages réalisés par brasage fort

La présente norme européenne décrit des procédures de contrôle non destructif et des types de pièces d'essai nécessaires pour effectuer les contrôles sur assemblages réalisés par brasage fort (assemblages brasés).
Les méthodes de contrôle non destructif décrites sont les suivantes :
a) contrôle visuel (voir article 4) ;
b) contrôle par ultrasons (voir article 5) ;
c) contrôle par radiographie (voir article 6) ;
d) contrôle par ressuage (voir article 7) ;
e) contrôle d'étanchéité (voir article 8) ;
f) épreuve de surcharge (voir article 9) ;
g) thermographie (voir article 10).
Les assemblages brasés sur lesquels ces contrôles sont effectués peuvent être soit fabriqués spécialement afin d'obtenir des informations sur la conception de l'assemblage réalisé par brasage fort, soit provenir d'un assemblage réalisé spécialement pour la qualification d'un mode opératoire de brasage fort, soit être prélevés sur un assemblage brasé. Le type de pièce d'essai décrit pour chaque contrôle peut être mentionné ou incorporé dans des normes d'application qui traitent des assemblages brasés.
La présente norme européenne ne donne pas de recommandations concernant le nombre d'échantillons à contrôler ou concernant les contre-essais autorisés. Elle ne spécifie pas de méthodes d'échantillonnage des assemblages brasés, bien qu'elle donne des précisions sur les précautions à prendre à ce sujet, et ne formule pas de commentaires sur les critères d'acceptation applicables aux contrôles. Elle n'a pas pour objet de définir les contrôles qu'il convient d'effectuer en fonction des situations particulières. Ce point doit être établi avant la sélection d’une méthode d’essais particulière.
Les méthodes de contrôle non destructif ne sont pas associées à un type particulier d'assemblage brasé, mais elles posent les principes généraux des méthodes de contrôle décrites. L'accent est mis sur le fait qu'une méthode de contrôle satisfaisante ne peut être développée et utilisée qu'en ayant pris en compte tous les facteurs pertinents concernant le matériel à utiliser et les caractéristiques de la pièce d’essai contrôlée.

Trdo spajkanje - Neporušitveno preskušanje trdo spajkanih spojev

General Information

• Status: Not Published
• Publication Date: 28-Feb-2019
• Withdrawal Date: 01-Sep-2019
• ICS: 25.160.50 - Brazing and soldering
• Technical Committee: CEN/TC 121 - Welding
• Drafting Committee: CEN/TC 121/WG 20 - Brazing
• Current Stage: 4098 - Decision to abandon - Enquiry
• Completion Date: 19-Dec-2018
• Ref Project: oSIST prEN 12799:2017 - Brazing - Non-destructive examination of brazed joints

Relations

• Revises: EN 12799:2000 - Brazing - Non-destructive examination of brazed joints
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2017
Trdo spajkanje - Neporušitveno preskušanje trdo spajkanih spojev
Brazing - Non-destructive examination of brazed joints
Hartlöten - Zerstörungsfreie Prüfung von Hartlötverbindungen
Brasage fort - Contrôles nob destructifs des assemblages réalisés par brasage fort
Ta slovenski standard je istoveten z: prEN 12799
ICS:
25.160.50 Trdo in mehko lotanje Brazing and soldering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2017
ICS 25.160.50 Will supersede EN 12799:2000
English Version
Brazing - Non-destructive examination of brazed joints
Brasage fort - Contrôles nob destructifs des Hartlöten - Zerstörungsfreie Prüfung von
assemblages réalisés par brasage fort Hartlötverbindungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 121.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12799:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 General principles . 6
4 Visual examination . 6
4.1 General . 6
4.2 Principle . 7
4.3 Qualification of personnel . 7
4.4 Requirements specific to the examination . 7
4.5 Information to be supplied for visual inspection . 7
4.6 Inspection aids and equipment . 8
4.7 Extent of visual inspection on each workpiece . 8
4.8 Acceptance guidelines . 10
4.9 Examination procedure . 11
4.10 Test results and information to be reported. 11
5 Ultrasonic examination . 12
5.1 General . 12
5.2 Principle . 12
5.3 Requirements specific to the examination . 15
5.4 Information to be supplied to the operator . 15
5.5 Equipment . 15
5.6 Preparation for examination . 16
5.7 Examination . 16
5.8 Examination procedure . 17
5.9 Test results and information to be reported. 17
6 Radiographic examination . 18
6.1 General . 18
6.2 Principle . 18
6.3 Examination procedure . 18
6.4 Test results and information to be reported. 18
7 Penetrant detection . 18
7.1 General . 18
7.2 Principle . 19
7.3 Preparation . 19
7.4 Examination procedure . 19
7.5 Safety precautions . 19
7.6 Test report and information to be reported . 20
8 Leak testing . 20
8.1 General . 20
8.2 Principle . 20
8.3 Preparation . 20
8.4 Examination procedure . 20
8.5 Safety and environmental factors . 21
8.6 Test results and information to be reported. 21
9 Proof testing . 22
9.1 General . 22
9.2 Principle . 22
9.3 Preparation of the test piece . 22
9.4 Examination procedure . 22
9.5 Test results and information to be reported . 23
10 Thermography . 23
10.1 General . 23
10.2 Preparation of the test piece . 24
10.3 Procedure . 24
10.4 Test results and information to be reported . 24
Annex A (informative) Imperfections in brazed joints . 25
Bibliography . 29

European foreword
This document (prEN 12799:2017) has been prepared by Technical Committee CEN/TC 121 “Welding
and allied processes”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12799:2000.
In comparison with the previous edition, the main changes are:
a) the normative references have been updated;
b) the document has been revised editorially.
1 Scope
This European Standard describes non-destructive examination procedures and test piece types
necessary to perform the tests on brazed joints.
The non-destructive examination methods described are as follows:
a) visual examination (see Clause 4);
b) ultrasonic examination (see Clause 5);
c) radiographic examination (see Clause 6);
d) penetrant examination (see Clause 7);
e) leak testing (see Clause 8);
f) proof testing (see Clause 9);
g) thermography (see Clause 10).
The brazed joints to which these tests are applied can either be test samples manufactured to obtain
brazed joint design data, or manufactured as part of the approval testing of a brazing procedure, or
parts of a brazed assembly. The type of test piece described for each test can be quoted or incorporated
in engineering application standards that deal with brazed assemblies.
This European Standard does not recommend the number of samples to be tested or the repeat tests
allowed. Neither does it specify methods of sampling brazed joints, except to give guidance regarding
the precautions necessary, nor does it comment on the acceptance criteria applicable to any of the tests.
No attempt is made to define which test or tests, if any, should be applied in any situation. This is a
matter to be established before any particular method of test is selected.
The methods of non-destructive examination are not associated with any particular type of brazed
assembly but lay down the general principles of the types of testing described. It is emphasized that a
satisfactory examination method can only be developed and used after taking into account all the
relevant factors regarding the equipment to be used and the characteristics of the test piece being
examined.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 1593, Non-destructive testing - Leak testing - Bubble emission te
...