SIST EN 14584:2005
(Main)Non-destructive testing - Acoustic emission - Examination of metallic pressure equipment during proof testing - Planar location of AE sources
Non-destructive testing - Acoustic emission - Examination of metallic pressure equipment during proof testing - Planar location of AE sources
This European Standard specifies the method for conducting acoustic emission (AE) + testing of metallic pressure equipment during acceptance pressure testing using a planar location method. General principles of acoustic emissions are described in EN 13554.
The objectives of the AE testing are to provide 100 % volumetric testing to define regions of the structure, which are acoustically active with burst type AE e.g. as a result of sub-critical flaw evolution; thus increasing the reliability of the acceptance test. The test provides a reference map for comparison with results of future tests.
Zerstörungsfreie Prüfung - Schallemissionsprüfung - Prüfung von metallischen Druckgeräten während der Abnahmeprüfung - Planare Ortung von Schallemissionsquellen
Dieses Dokument legt die Methode zur Durchführung einer Schallemissionsprüfung (AT) an metallischen
Druckgeräten während der Druck-Abnahmeprüfung unter Anwendung der planaren Ortung fest. Allgemeine
Grundlagen der Schallemission sind in EN 13554 beschrieben.
Das Ziel der Schallemissionsprüfung ist eine 100 % Volumenprüfung, um jene Regionen in der Struktur zu
bestimmen, die als Folge von subkritischem Fehlerwachstum aktive, transiente Schallemission aufweisen,
was die Zuverlässigkeit der Abnahmeprüfung erhöht. Die Prüfung ergibt Referenzdaten für den Vergleich mit
den Ergebnissen späterer Prüfungen.
Essais non destructifs - Emission acoustique - Vérification des équipements métalliques sous pression pendant l'épreuve - Localisation planaire des sources d'EA
La présente Norme européenne prescrit la méthode a utiliser pour effectuer le contrôle par émission acoustique (EA) des équipements métalliques sous pression, pendant l'épreuve en pression réalisée lors de leur réception, a l'aide de la méthode de localisation planaire. Les principes généraux de l'émission acoustique sont décrits dans l'EN 13554.
Le contrôle par EA a pour objectif d'assurer une vérification volumétrique a 100 % en vue de définir les zones acoustiquement actives de la structure grâce au mesurage des émissions acoustiques en salves, c'est-a-dire celles qui résultent de la propagation sous-critique des défauts. Il permet ce faisant d'améliorer la fiabilité de l'essai de réception. L'essai fournit une cartographie de référence permettant la comparaison avec les résultats des contrôles futurs.
Neporušitveno preiskušanje – Akustična emisija – Pregled kovinskih tlačnih naprav med preskušanjem – Ravninska namestitev virov akustične emisije
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 14584:2005
01-november-2005
1HSRUXãLWYHQRSUHLVNXãDQMH±$NXVWLþQDHPLVLMD±3UHJOHGNRYLQVNLKWODþQLK
QDSUDYPHGSUHVNXãDQMHP±5DYQLQVNDQDPHVWLWHYYLURYDNXVWLþQHHPLVLMH
Non-destructive testing - Acoustic emission - Examination of metallic pressure equipment
during proof testing - Planar location of AE sources
Zerstörungsfreie Prüfung - Schallemissionsprüfung - Prüfung von metallischen
Druckgeräten während der Abnahmeprüfung - Planare Ortung von
Schallemissionsquellen
Essais non destructifs - Emission acoustique - Vérification des équipements métalliques
sous pression pendant l'épreuve - Localisation planaire des sources d'EA
Ta slovenski standard je istoveten z: EN 14584:2005
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
19.100 Neporušitveno preskušanje Non-destructive testing
SIST EN 14584:2005 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 14584:2005
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SIST EN 14584:2005
EUROPEAN STANDARD
EN 14584
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2005
ICS 17.140.20; 77.040.20
English Version
Non-destructive testing - Acoustic emission - Examination of
metallic pressure equipment during proof testing - Planar
location of AE sources
Essais non destructifs - Emission acoustique - Vérification Zerstörungsfreie Prüfung - Schallemissionsprüfung -
des équipements métalliques sous pression pendant Prüfung von metallischen Druckgeräten während der
l'épreuve - Localisation planaire des sources d'EA Abnahmeprüfung - Planare Ortung von
Schallemissionsquellen
This European Standard was approved by CEN on 8 July 2005.
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. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14584:2005: E
worldwide for CEN national Members.
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SIST EN 14584:2005
EN 14584:2005 (E)
Contents
Page
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms and definitions .4
4 Personnel qualification .4
5 Test method.4
5.1 General.4
5.2 Application of load.5
5.3 Sensors.5
5.4 Location .5
5.5 Preliminary information .5
5.6 Written instruction requirements.6
6 Instrumentation.6
7 Testing .7
7.1 Pre-test measurements .7
7.2 Test steps .9
8 Interpretation of results .10
8.1 Grading criteria .10
8.2 Real time control.10
8.3 AE source severity grading .11
9 Documentation.12
Annex A (normative) Distance peak amplitude correction procedures.13
Bibliography .15
2
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SIST EN 14584:2005
EN 14584:2005 (E)
Foreword
This European Standard (EN 14584:2005) has been prepared by Technical Committee CEN/TC 138 “Non-
destructive testing”, the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an identical text or
by endorsement, at the latest by February 2006, and conflicting national standards shall be withdrawn at the latest
by February 2006.
This European Standard has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark,
Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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SIST EN 14584:2005
EN 14584:2005 (E)
1 Scope
This European Standard specifies the method for conducting acoustic emission (AE) + testing of metallic pressure
equipment during acceptance pressure testing using a planar location method. General principles of acoustic
emissions are described in EN 13554.
The objectives of the AE testing are to provide 100 % volumetric testing to define regions of the structure, which
are acoustically active with burst type AE e.g. as a result of sub-critical flaw evolution; thus increasing the reliability
of the acceptance test. The test provides a reference map for comparison with results of future tests.
2 Normative references
The following referenced documents are indispensable for the application of this European Standard. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced document
(including any amendments) applies.
EN 473, Non-destructive testing – Qualification and certification of NDT personnel – General principles
EN 1330-1:1998, Non-destructive testing – Terminology – Part 1: List of general terms
EN 1330-2:1998, Non-destructive testing – Terminology – Part 2: Terms common to the non-destructive testing
methods
EN 1330-9:2000, Non-destructive testing – Terminology – Part 9: Terms used in acoustic emission testing
EN 13477-1, Non-destructive testing – Acoustic emission – Equipment characterisation – Part 1: Equipment
description
EN 13477-2, Non-destructive testing – Acoustic emission – Equipment characterisation – Part 2: Verification of
operating characteristic
3 Terms and definitions
For the purpose of this European Standard, the terms and definitions given in EN 1330-1:1998, EN 1330-2:1998
and EN 1330-9:2000 apply.
4 Personnel qualification
It is assumed that acoustic emission testing is performed by qualified and capable personnel. In order to prove this
qualification, it is recommended to certify the personnel in accordance with EN 473.
NOTE For pressure equipment see directive 97/23/EC, Annex 3.1.3: "For pressure equipment in categories III and IV, the
personnel must be approved by a third party organization recognized by a Member State".
5 Test method
5.1 General
The main target of the AE test is to locate and monitor acoustic emission sources caused by phenomena e.g. crack
growth and yielding generated by the applied load to the equipment.
The properties and structural state of the material, the type and magnitude of the applied stress and stress rate are
significant factors affecting the emission.
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SIST EN 14584:2005
EN 14584:2005 (E)
All the relevant located AE sources shall be evaluated by other NDT methods.
5.2 Application of load
The application of the stress to the equipment shall be made using internal pressure following the procedure
specified in the relevant product standard. The rate of the application of pressure shall be established so as to
avoid burst signal overlap. The pressurising system shall permit pressurisation at a steady controllable rate and
shall allow the pressure to be held constant at the hold points. The pressurisation rate would not normally exceed
1 % for pneumatic and 5 % for hydraulic test pressure per minute. The intermediate hold periods, if necessary
according to the AE activity or the pre-defined pressure schedule, will normally be 5 min to 10 min. The final hold
period at the test pressure shall have a minimum duration of 15 min.
NOTE Intermediate hold periods are strongly recommended, especially if pressurisation rates exceed 0,5 %/min for
pneumatic or 2 %/min for hydraulic tests.
Prior to starting the test, all the necessary actions shall be taken to identify and to reduce potential sources of
extraneous noise.
Dependent upon the results of the initial loading, a reduction of the load to working pressure or lower, followed by
re-pressurisation, may be required.
5.3 Sensors
The most commonly used frequency range is 100 kHz to 300 kHz. Lower frequency monitoring allows detection at
greater distances and high frequency monitoring provides improved rejection of external noise. Selection of
frequency range may optimise location accuracy by avoiding the detection of multiple wave modes.
The equipment surface below the sensors shall be cleaned to ensure the maximum coupling efficiency. The sensor
couplant shall be as specified in the written test instruction. The sensors may be directly attached to the structure
using magnetic devices or an adhesive.
The effectiveness and reliability of the acoustic couplant shall be verified. The characteristics of the type of the
acoustic couplant used shall not affect the structure adversely.
5.4 Location
The location of AE sources is performed using delta t measurement.
The accuracy is normally within ± 5 % of the sensor spacing and shall be measured and verified using an artificial
source. If the accuracy is not within ± 5 %, appropriate action shall be taken.
For difficult geometry e.g. nozzles, manholes, reference measurements shall be made.
5.5 Preliminary information
Prior to the test, the AE Test Organisation shall collect the following information, as relevant:
a) relevant product standard;
b) type of equipment or structure and material characteristics and specifications;
c) assembly and/or layout drawings with sufficient details of the structure;
d) material specifications, including heat treatment, if applicable;
e) proposed pressure/stress application sequence;
f) potential acoustic noise interference sources and the isolating mechanism applied;
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SIST EN 14584:2005
EN 14584:2005 (E)
g) where possible, locations of known discontinuities and the general results of prior NDT.
5.6 Written instruction requirements
The AE test organisation shall provide a written test procedure, which shall include but not necessarily be restricted
to the following:
a) explicit indication of the purpose of the test and limitations if any;
b) sensor type, frequency and manufacturer;
c) method of sensor attachment;
d) type of acoustic couplant used;
e) type of surface preparation;
f) type of AE equipment used with the main characteristics;
g) energy measurement method to be used;
h) value of K from relevant product standard, if available;
i) sensor location maps representing the structure or part of it;
j) description of equipment verification procedure;
k) description of the in-situ verification (see 7.2.2);
l) sequence of pressurisation;
m) recorded data and recording method;
n) available on-line presentation of data;
o) real time evaluation criteria;
p) post analysis procedure with adopted filtering t
...
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