Railway applications - Rolling stock - Requirements for non-destructive testing on running gear in railway maintenance - Part 1: Wheelsets

This standard provides the specific requirements for non-destructive testing (NDT) of wheelsets for:
— in-service inspection,
— off-vehicle inspection,
— NDT Personnel Certification (incl. training, qualification, renewal),
— NDT Procedure and Instruction,
— introduction of new NDT Techniques,
For this standard, the following NDT methods considered are:
— ultrasound testing (UT),
— magnetic particle testing (MT),
— eddy current testing (ET),
For application of these methods, a catalogue of common defects is given as guidance.
Other methods considered in ISO 9712 are outside the scope of this standard.
For application of this standard the definition of the “Wheelset Class” is given and attached to the Railway Maintenance Sector as named in ISO 9712.
Specific NDT requirements for infrastructure or requirements relating to the quality of new products delivered by manufacturers are not within the scope of this standard.

Bahnanwendungen - Schienenfahrzeuge - Anforderungen an die zerstörungsfreie Prüfung an Fahrwerken in der Instandhaltung - Teil 1: Radsätze

Diese Europäische Norm legt die spezifischen Anforderungen der ZfP von Radsätzen fest, für:
-   Instandhaltung im Betrieb;
-   Instandhaltung im ausgebauten Zustand;
-   ZfP-Personal;
-   ZfP-Dokumentation (Verfahren und Anweisung);
-   Rückverfolgbarkeit der ZfP-Ergebnisse in der Instandhaltung.
Sie gibt Anleitungen für die Einführung neuer ZfP-Techniken.
In dieser Norm werden folgende ZfP-Verfahren berücksichtigt:
-   Ultraschallprüfung (UT);
-   Magnetpulverprüfung (MT);
-   Wirbelstromprüfung (ET).
Beispiele üblicher ZfP-Anzeigen sind im informativen Anhang zu finden.
Andere in EN ISO 9712:2012 genannte Verfahren liegen außerhalb des Anwendungsbereichs dieser Norm.
Zu diesem Zweck ist ein Katalog der häufigsten Fehler als Orientierungshilfe gegeben.
Spezifische ZfP-Anforderungen an die Qualität neuer Produkte, die durch die Hersteller geliefert werden, liegen außerhalb des Anwendungsbereichs dieser Norm.

Applications ferroviaires - Matériel roulant - Exigences pour les essais non destructifs sur les organes de roulement lors de la maintenance ferroviaire - Partie 1: Essieux

La présente Norme européenne définit les exigences spécifiques relatives aux END des essieux pour :
-   la maintenance des essieux posés sous véhicule ;
-   la maintenance des essieux déposés ;
-   le personnel END ;
-   la documentation END (Procédures et Instructions) ;
-   la traçabilité des résultats des END de maintenance.
Elle donne les lignes directrices pour la mise en place de nouvelles techniques END.
Pour les besoins de la présente norme, les méthodes END suivantes sont prises en compte :
-   Ultrasons (UT) ;
-   Magnétoscopie (MT) ;
-   Courants de Foucault (ET).
Des exemples des indications communes d’END sont donnés dans une annexe informative.
Les autres méthodes traitées dans l'EN ISO 9712:2012 sont en dehors du domaine d'application de la présente norme.
À cet effet, un catalogue des défauts communs est fourni à titre de ligne directrice.
Les exigences END spécifiques concernant la qualité des produits neufs fournis par les fabricants sont en dehors du domaine d'application de la présente Norme européenne.

Železniške naprave - Vozna sredstva - Zahteve za neporušitveno preskušanje na tekalnih sestavih pri vzdrževanju železnice - 1. del: Kolesne dvojice

Ta standard določa posebne zahteve za neporušitveno preskušanje (NDT) kolesnih dvojic za: – pregled med obratovanjem,
– pregled kolesnih dvojic, ki niso nameščene na vozilu,
– certifikacijo osebja za NDT (vklj. z usposabljanjem, kvalifikacijami, obnovitvijo),
– postopke in navodila za NDT,
– uvedbo novih tehnik za NDT.
Ta standard se nanaša na naslednje metode za NDT: – ultrazvočno preskušanje (UT),
– preskušanje z magnetnimi delci (MT),
– preskušanje z metodo vrtinčnih tokov (ET).
Za uporabo teh metod je naveden katalog pogostih napak, ki služi kot smernice.  Druge metode, obravnavane v standardu ISO 9712, niso zajete v področje uporabe tega standarda. Za uporabo tega standarda je navedena opredelitev »razreda kolesnih dvojic« in priložena razdelku o vzdrževanju železnice, kot je imenovan v standardu ISO 9712. Posebne zahteve glede NDT za infrastrukturo ali zahteve v zvezi s kakovostjo novih izdelkov, ki jih dobavijo proizvajalci, niso zajete v področje uporabe tega standarda.

General Information

Status
Published
Public Enquiry End Date
29-Sep-2015
Publication Date
09-May-2018
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
07-May-2018
Due Date
12-Jul-2018
Completion Date
10-May-2018

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Železniške naprave - Vozna sredstva - Zahteve za neporušitveno preskušanje na tekalnih sestavih pri vzdrževanju železnice - 1. del: Kolesne dvojiceBahnanwendungen - Schienenfahrzeuge - Anforderungen an die zerstörungsfreie Prüfung an Fahrwerken in der Instandhaltung - Teil 1: RadsätzeApplications ferroviaires - Matériel roulant - Exigences pour les essais non destructifs sur les organes de roulement lors de la maintenance ferroviaire - Partie 1: EssieuxRailway applications - Rolling stock - Requirements for non-destructive testing on running gear in railway maintenance - Part 1: Wheelsets45.120åLþQLFEquipment for railway/cableway construction and maintenance45.060.01Železniška vozila na splošnoRailway rolling stock in generalICS:Ta slovenski standard je istoveten z:EN 16910-1:2018SIST EN 16910:2018en01-julij-2018SIST EN 16910:2018SLOVENSKI

STANDARD
SIST EN 16910:2018
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16910-1
April
t r s z ICS
v wä r v r English Version

Railway applications æ Rolling stock æ Requirements for nonædestructive testing on running gear in railway maintenance æ Part

sã Wheelsets Applications ferroviaires æ Matériel roulant æ Exigences pour les essais non destructifs sur les organes de roulement lors de la maintenance ferroviaire æ Partie

sã Essieux

Bahnanwendungen æ Schienenfahrzeuge æ Anforderungen an die zerstörungsfreie Prüfung an Fahrwerken in der Instandhaltung æ Teil

sã Radsätze This European Standard was approved by CEN on
t t January
t r s zä

egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä

translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä

CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels

t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN

s x { s ræ sã t r s z ESIST EN 16910:2018
EN 16910-1:2018 (E) 2 Contents

Page European foreword ....................................................................................................................................................... 4 Introduction .................................................................................................................................................................... 5 1 Scope .................................................................................................................................................................... 6 2 Normative references .................................................................................................................................... 6 3 Terms and definitions ................................................................................................................................... 7 4 Requirements for NDT personnel ............................................................................................................. 8 4.1 General ................................................................................................................................................................ 8 4.2 Training .............................................................................................................................................................. 9 4.2.1 Training contents for Wheelsets ............................................................................................................... 9 4.2.2 Industrial experience .................................................................................................................................... 9 4.3 Examination for levels 1 and 2 ................................................................................................................ 10 4.3.1 General examination ................................................................................................................................... 10 4.3.2 Specific examination in wheelsets ......................................................................................................... 10 4.3.3 Practical examination in wheelsets ....................................................................................................... 11 4.3.4 Grading of the level 1 and level 2 competencies ............................................................................... 11 4.4 Specific requirements to operate as a Level 3 wheelsets .............................................................. 12 4.5 Validation of competences ........................................................................................................................ 12 4.6 Requirements for the training centre ................................................................................................... 13 4.7 Requirements for the trainer .................................................................................................................. 13 4.8 Authorization to operate ........................................................................................................................... 13 4.8.1 General principle .......................................................................................................................................... 13 4.8.2 Validity of authorization ............................................................................................................................ 13 4.8.3 Maintenance of authorization ................................................................................................................. 14 5 In-service and off-vehicle NDT requirements for maintenance .................................................. 14 5.1 General principles ........................................................................................................................................ 14 5.2 Detection of defects by NDT ..................................................................................................................... 15 5.2.1 General ............................................................................................................................................................. 15 5.2.2 Defects .............................................................................................................................................................. 16 5.3 Traceability of maintenance results ..................................................................................................... 17 5.3.1 General ............................................................................................................................................................. 17 5.3.2 Traceability requirement for the examination report ................................................................... 17 5.3.3 Traceability storage time .......................................................................................................................... 18 6 Requirements for NDT procedures and instructions for wheelsets .......................................... 18 6.1 NDT procedures ............................................................................................................................................ 18 6.2 NDT instructions .......................................................................................................................................... 19 6.3 Validation and approval of NDT documents ...................................................................................... 19 6.3.1 Validation of NDT instructions ................................................................................................................ 19 6.3.2 Approval of NDT procedures ................................................................................................................... 20 7 Requirements for NDT equipment......................................................................................................... 20 7.1 Authorization of use of NDT equipment .............................................................................................. 20 7.1.1 Scope ................................................................................................................................................................. 20 7.1.2 Recommendations ....................................................................................................................................... 20 7.1.3 Requirements ................................................................................................................................................ 21 7.1.4 Authorisation of use document ............................................................................................................... 21 SIST EN 16910:2018

EN 16910-1:2018 (E) 3 7.1.5 Maintenance of equipment ....................................................................................................................... 21 8 Introduction of new NDT techniques .................................................................................................... 21 9 Requirements for the NDT facilities ...................................................................................................... 22 10 Visual acuity ................................................................................................................................................... 22 Annex A (informative)

Processes to acquire competencies for levels 1, 2 and 3 in wheelsets ..... 23 Annex B (normative)

Training content for specific knowledge of wheelsets for Levels 1 and 2 in MT, ET and UT ........................................................................................................................................ 24 Annex C (informative)

NDT equipment verification management plan ................................................ 27 Annex D (informative)

Examples for common indications ........................................................................ 28 D.1 Wheels .............................................................................................................................................................. 28 D.2 Axles .................................................................................................................................................................. 29 Annex ZA (informative)

Relationship between this European Standard and the Essential Requirements of EU Directive 2008/57/EC aimed to be covered............................................... 34 Bibliography ................................................................................................................................................................. 36

SIST EN 16910:2018

EN 16910-1:2018 (E) 4 European foreword This document (EN 16910-1:2018) has been prepared by Technical Committee CEN/TC 256 “Railway applications”, the secretariat of which is held by DIN. 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 October 2018, and conflicting national standards shall be withdrawn at the latest by October 2018. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive 2008/57/EC. For relationship with EU Directive 2008/57/EC, see informative Annex ZA, which is an integral part of this document. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: 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 the United Kingdom. SIST EN 16910:2018

EN 16910-1:2018 (E) 5 Introduction For many years, non-destructive testing (NDT) has been used as a part of the maintenance system on European networks to control the influence of in-service condition on safety-relevant assembly groups, components and parts in order to ensure that the inspected entity treated will be used in-service in a safe condition. The maintenance standard (EN 15313 wheelsets maintenance) requires appropriately trained and capable personnel undertaking these NDT maintenance tasks (see EN ISO 9712:2012). The purpose of this document is to describe the necessary requirements on NDT additional to the existing standards to promote safety, interoperability and cross acceptance. The maintenance plan for wheelsets should ensure safe operation of railway vehicles at the right cost. It deals with wear, unexpected damages, and takes into account the vehicles usage and the track conditions. In this context, NDT is used to search for defects and failures on wheelsets. SIST EN 16910:2018

EN 16910-1:2018 (E) 6 1 Scope This European Standard provides the specific requirements for NDT of wheelsets for: — in-service maintenance; — off-vehicle maintenance; — NDT personnel; — NDT documentation (Procedure and Instruction); — traceability of the maintenance NDT results. It gives guidance for the introduction of new NDT techniques. For this standard, the following NDT methods are considered: — Ultrasonic testing (UT); — Magnetic particle testing (MT); — Eddy Current testing (ET). Other methods considered in EN ISO 9712:2012 are outside the scope of this standard. For this purpose, a catalogue of the common defects is given as guidance. Examples of common NDT indications are given in an informative annex. Specific NDT requirements relating to the quality of new products delivered by manufacturers are not within the scope of this European Standard. 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 15313, Railway applications - In-service wheelset operation requirements - In-service and off-vehicle wheelset maintenance EN ISO 9712:2012, Non-destructive testing - Qualification and certification of NDT personnel (ISO 9712:2012) CEN ISO/TR 25107:2006, Non-destructive testing — Guidelines for NDT training syllabuses (ISO/TR 25107:2006) SIST EN 16910:2018

EN 16910-1:2018 (E) 7 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 15313 and the following apply. 3.1 non-destructive tests NDT process of examining a component to assess its integrity by a means which does not compromise the components properties and characteristics 3.2 indication representation or signal from a discontinuity in the format typical for the NDT method used [SOURCE: EN 1330-2:1998, 2.12] 3.3 defect discontinuity defect discontinuity or inhomogeneity which creates an indication which can prevent the component from fulfilling its designed purpose 3.4 acceptance or rejection criteria criteria against which the specimen is examined in order to determine its acceptability / rejectability 3.5 cracks local separation of material mostly of 2 dimensions direction resulting from thermal, chemical or mechanical exposure 3.6 NDT instruction written description of the precise steps to be followed in testing to an established standard, code, specification or NDT procedure [SOURCE: EN ISO 9712:2012, 3.16] 3.7 NDT method discipline applying a physical principle in non-destructive testing [SOURCE: EN ISO 9712:2012, 3.17] 3.8 NDT procedure written description of all essential parameters and precautions to be applied when non-destructively testing products in accordance with standard(s), code(s) or specification(s) [SOURCE: EN ISO 9712:2012, 3.18] 3.9 NDT technique specific way of utilizing an NDT method SIST EN 16910:2018

EN 16910-1:2018 (E) 8 [SOURCE: EN ISO 9712:2012, 3.19] 3.10 NDT training process of instruction in theory and practice in the NDT method 3.11 semi-automated test equipment mechanical equipment with automated mechanical movement of the test object or test equipment but evaluation is left to the NDT personnel 3.12 detection threshold defect size at which defects can be reliably detected by the chosen method 4 Requirements for NDT personnel 4.1 General NDT personnel shall have knowledge and skills relevant to the component to which they are inspecting. An example of a typical process is shown in the Informative Annex A. The organization offering the training, examination and acceptance of experience shall provide evidence of fulfilling the relevant requirements of this standard. NOTE In practice the evidence is provided by an independent body to the organization. These processes are organized with three levels of competence: — level 1 personnel: persons with competencies in a specific NDT method that allows to perform the following in accordance with NDT instructions: set up NDT equipment, perform the tests, record and classify the results of the tests according to written criteria, report the results; — level 2 personnel: persons with competencies in a specific NDT method that allows to deal with the following points:

choose NDT techniques, tests, equipment, specification and procedures;
select the NDT technique for the testing method to be used;
define the limitations of application of the testing method;

translate NDT codes, standards, specifications and procedures into NDT instructions adapted to the actual working conditions;

set up and verify equipment settings;
perform and supervise tests;

interpret and evaluate results according to applicable standards, codes specifications or procedures;

carry out and supervise all tasks at or below Level 2;
provide guidance for personnel at or below level 2; SIST EN 16910:2018
EN 16910-1:2018 (E) 9

report the results; — level 3 personnel: persons with competencies that allow to perform and direct NDT operations and validate documents. In order to work as NDT personnel the person has to follow training and pass an examination. In addition the employer shall authorize the person to operate in accordance with the conditions of paragraph 4.8. 4.2 Training 4.2.1 Training contents for Wheelsets The training required for each different NDT method shall include both wheelset-specific theoretical and practical training. The minimum length of training required for each different NDT method shall be in accordance with Table 1. Table 1 — Minimum training requirements (hours) NDT methods Level 1 Level 2 from level 1 wheelset Direct access level 2

Basics Wheelsets Basics Wheelsets Basics Wheelsets Ultrasonic Testing (UT) 40 40 80 0 120 40 Magnetic particle Testing (MT) 16 8 24 0 40 8 Eddy Current Testing (ET) 40 8 48 0 88 8 The complete training content is defined in the Normative Annex B. 4.2.2 Industrial experience Table 2 gives the minimum days of experience of NDT on wheelsets prior to examination. Table 2 — Minimum period of experience prior to examination (in days) NDT methods level 1 level 2 From level 1 in wheelset direct Magnetic particle Testing (MT) 3 7 10 Ultrasonic Testing (UT) Eddy Current Testing (ET) 7 19 26 SIST EN 16910:2018

EN 16910-1:2018 (E) 10 Table 3 gives the minimum duration of supervised experience after examination. Table 3 — Minimum period of experience after examination (in months) NDT methods Experience a Level 1 Level 2 Magnetic particle Testing (MT) 1 3 Ultrasonic Testing (UT) Eddy Current Testing (ET) 3 9 a Work experience is based on a nominal 40 h/week or the legal week of work. When an individual works in excess of 40 h/week, they may be credited with experience based on the total hours, but they shall be required to produce evidence of their experience. 4.3 Examination for levels 1 and 2 4.3.1 General examination The general examination shall include only randomly selected questions from a collection of general examination questions valid at the date of examination. The candidate shall give answers to the minimum number of multiple choice questions shown in Table 4. The collection of questions shall be validated by an independent body. Table 4 — Minimum required number of questions - general examination NDT method Number of questions UT 40 ET 40 MT 30 4.3.2 Specific examination in wheelsets The specific examination shall include only questions selected from a collection of questions related to wheelsets. During the specific examination, the candidate shall be required to give answers to at least 20 multiple choice questions, including questions involving calculations, NDT procedures and questions on codes, standards and specifications. The following topics shall be addressed in the questions: 1) terms and definitions; 2) purpose of NDT; 3) typical equipment and techniques; 4) typical defects for wheelsets for manufacturing as well as in service; 5) typical procedures. The collection of questions shall be validated by an independent body. SIST EN 16910:2018

EN 16910-1:2018 (E) 11 4.3.3 Practical examination in wheelsets The practical examination shall involve applying the test to prescribed wheelset specimens, recording (and, for level 2 candidates, interpreting) the resulting information to the degree required, and reporting the results in the required format. The training specimen shall not be used during practical examination. Each specimen shall be uniquely identified and have a master report which includes all of the equipment settings used to detect specified discontinuities contained within the specimen, which shall be uniquely identified by an appropriate permanent marking to ensure that it is completely traceable. Such marking shall not interfere with the practical testing or inspection of the specimen and shall, wherever practicable, be concealed from the candidate while the specimen is being used for examination. The master report shall be compiled based upon at least two independent tests, and shall be validated by level 3 wheelset NDT personnel, for use in grading examinations. The independent test reports from which the master report is compiled shall be retained as records. The practical examination shall be performed with: — tests and procedures typical for the candidates working site; — defects typical to those detected during maintenance. They should be natural or artificially created. The candidate is required to demonstrate their ability to: — set up the test equipment; — check and calibrate the said equipment; — perform tests on specified specimen; — complete test reports. The level 1 candidate shall follow the NDT instruction(s) provided by the examiner. The level 2 candidate shall select the NDT technique and determine the operating conditions related to a given code, standard and specification. The time allowed for the examination depends on the number of specimens and on their complexity. The average time allowed shall be defined by an independent body. The recommended maximum time allowed for each area or volume tested: — for level 1: 2 h; — for level 2: 3 h. Level 2 candidates shall draft one written instruction for Level 1 NDT personnel. This instruction shall be applicable to a wheelset component. The collection of specimens and practical questions shall be validated by an independent body. The candidate shall be evaluated on a minimum of 2 wheelset specimens for the practical examination of levels 1 and 2. 4.3.4 Grading of the level 1 and level 2 competencies The general, specific and practical examinations shall be graded separately. An examiner shall be responsible for the grading of the examinations by comparing with model answers. The grading of the practical examination shall be based on items 1 to 4 in Table 5. SIST EN 16910:2018

EN 16910-1:2018 (E) 12 Table 5 — Subjects and weighting factors for grading - practical examination Item Subject Weighting factor level 1 (%) Weighting factor level 2 (%) 1 Knowledge of the NDT equipment, including the function and verification of the setting of the apparatus 20 10 2 The application of NDT to the specimen. This consists of the following parts: For level 2, selection of the techniques and determination of the operating conditions; The preparation (surface condition) and visual examination of the specimen; The setting up of the equipment; The performance of the test; The operations after the test. 35 20 3 The detection and reporting of the discontinuities and, for level 2, their characterization (position, orientation, dimensions and type) and evaluation. 45 55 4 For level 2, drafting the written instruction for level 1. - 15 The candidate shall obtain a minimum grade of 70 % in each part of the examination (general, specific, and practical). In addition, for the practical examination, a minimum grade of 70 % shall be obtained for each specimen tested, and for the NDT instruction, as applicable. The grading system shall be validated by an independent body. 4.4 Specific requirements to operate as a Level 3 wheelsets A level 3 qualification shall include forging products in the relevant NDT methods according to EN ISO 9712. A documented file shall be established to demonstrate that the candidate has manufacturing knowledge and experience in wheelsets maintenance, including wheelset, usage, and failure modes. NOTE Knowledge of EN 15313 is a possible way to demonstrate knowledge in wheelset maintenance. 4.5 Validation of competences Competencies of the candidate shall be documented. The document (like a wallet card) shall refer to “Wheelset Maintenance”. NOTE Wallet card as defined in EN ISO 9712. SIST EN 16910:2018

EN 16910-1:2018 (E) 13 4.6 Requirements for the training centre The training centre shall: — apply a documented quality procedure; — have the resources needed to administer training, including the calibration and control of equipment; — have adequate staff, premises and equipment to ensure a satisfactory training program as defined in this clause for the applicable levels and methods; — use specimen with defects and equipment as used in the field; NOTE CEN ISO/TR 25108 can be used as guidance. 4.7 Requirements for the trainer The operative trainer shall be level 2 or higher and shall have at least one year of experience in the method and in wheelset maintenance. The theory trainer shall either be: — level 3 or — level 2 that shall have at least one year experience in the method and in wheelset maintenance. 4.8 Authorization to operate 4.8.1 General principle The NDT personnel shall be authorized to perform non-destructive tests on designated components and assemblies, within a given context. Basic requirements for NDT personnel to be authorized are: — Successfully passed a training programme according 4.2; — Successfully passed an examination according 4.3; — Documented internal on the job training and documented specific instruction by the employer; — Valid (yearly) visual acuity according to § 10; — Yearly documentary evidence of satisfactory work activity in the method. NOTE The authorization is usually provided by the organization responsible for the workshop or its subcontracting entity. 4.8.2 Validity of authorization The duration of authorization shall not exceed one year except the authorization of level 3 personnel. SIST EN 16910:2018

EN 16910-1:2018 (E) 14 4.8.3 Maintenance of authorization Option 1 The following points are required to maintain the authorization during a one year period: a) level 1: 1) shall undertake a documented technical evaluation by a level 2 or higher; 2) this evaluation shall be performed in the workshop or by a training centre and shall last a minimum of 2 h per NDT method; b) level 2: 1) shall undertake a documented technical evaluation by a Level 2 or a Level 3 person; 2) shall participate or organize a 4 h minimum meeting per NDT method where the following areas should be addressed: — return of experience (review of events, findings, evaluations); — new developments in the method. Option 2 The following points are required to maintain the authorization, during a five year period: Yearly documentary evidence of skills by satisfactory work activity in the NDT method, and; a) level 1: 1) shall undertake yearly a documented technical evaluation by a level 2 or higher; 2) shall undertake a review of adequate technical knowledge of NDT methods every five years by a training centre that shall last a minimum of 10 h per NDT method; b) level 2: 1) shall undertake yearly a documented technical evaluation by a level 2 or a Level 3 person; 2) shall undertake a review of adequate technical knowledge of NDT methods every five year

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