SIST-TP CEN/TR 16638:2014

Non-destructive testing - Penetrant and magnetic particle testing using blue light

This Technical Report specifies the requirements for penetrant and magnetic particle testing, the materials and viewing conditions when using fluorescent detection media excited by actinic blue light. It is not intended that this “sub-method” technique is used as a substitute for the existing colour contrast and fluorescent techniques standardised in the EN ISO 3452 series and EN ISO 9934 series.

Zerstörungsfreie Prüfung - Eindring- und Magnetpulverprüfung unter Anwendung von blauem Licht

In diesem Dokument werden für Eindring  und Magnetpulverprüfungen, die eine Anregung fluoreszierender Prüfmittel durch aktinisches blaues Licht anwenden, Anforderungen an Prüfmittel und Betrachtungs-bedingungen festgelegt.
Diese „Subverfahrenstechnik“ ist nicht als Ersatz für die bekannten Farbkontrast  und Fluoreszenzverfahren vorgesehen, die in den Normen der Reihen EN ISO 3452 bzw. EN ISO 9934 festgelegt sind.

Essais non destructifs - Essais par ressuage et essais par magnétoscopie à la lumière bleue

Le présent Rapport technique spécifie les exigences applicables aux essais par ressuage et par magnétoscopie, ainsi qu'aux produits d'essai à utiliser et aux conditions d'observation à mettre en œuvre lors de l'utilisation de produits indicateurs fluorescents excités par des sources de lumière bleue actinique.
Ce procédé n'est pas destiné à être utilisé comme une solution de remplacement des techniques utilisant des produits colorés et des techniques utilisant des produits fluorescents normalisées dans les séries de normes EN ISO 3452 et EN ISO 9934.

Neporušitvene preiskave - Pregled s penetranti in magnetnimi delci z uporabo modre svetlobe

To tehnično poročilo določa zahteve za pregled s penetranti in magnetnimi delci, materiale in pogoje opazovanja pri uporabi fluorescenčnih medijev za zaznavanje, vzbujanih z modro aktinično svetlobo. Ta »podmetoda« ni mišljena kot nadomestilo za obstoječe metode s kontrastnimi barvami in fluorescenčne metode, ki so standardizirane v skupinah EN ISO 3452 in EN ISO 9934.

General Information

• Status: Published
• Public Enquiry End Date: 30-Oct-2013
• Publication Date: 29-Jun-2014
• ICS: 19.100 - Non-destructive testing
• Technical Committee: PKG - Testing of metallic materials
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 29-May-2014
• Due Date: 03-Aug-2014
• Completion Date: 30-Jun-2014
• Ref Project: CEN/TR 16638:2014 - Non-destructive testing - Penetrant and magnetic particle testing using blue light

Standards Content (Sample)

SLOVENSKI STANDARD
SIST-TP CEN/TR 16638:2014
01-julij-2014
Neporušitvene preiskave - Pregled s penetranti in magnetnimi delci z uporabo
modre svetlobe
Non-destructive testing - Penetrant and magnetic particle testing using blue light
Zerstörungsfreie Prüfung - Eindring- und Magnetpulverprüfung unter Anwendung von
blauem Licht
Essais non destructifs - Essais par ressuage et essais par magnétoscopie à la lumière
bleue
Ta slovenski standard je istoveten z: CEN/TR 16638:2014
ICS:
19.100 Neporušitveno preskušanje Non-destructive testing
SIST-TP CEN/TR 16638:2014 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST-TP CEN/TR 16638:2014

---------------------- Page: 2 ----------------------

SIST-TP CEN/TR 16638:2014

TECHNICAL REPORT
CEN/TR 16638

RAPPORT TECHNIQUE

TECHNISCHER BERICHT
February 2014
ICS 19.100
English Version
Non-destructive testing - Penetrant and magnetic particle testing
using blue light
Essais non destructifs - Essais par ressuage et essais par Zerstörungsfreie Prüfung - Eindring- und
magnétoscopie à la lumière bleue Magnetpulverprüfung unter Anwendung von blauem Licht


This Technical Report was approved by CEN on 9 December 2013. It has been drawn up by the Technical Committee CEN/TC 138.

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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 16638:2014 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------

SIST-TP CEN/TR 16638:2014
CEN/TR 16638:2014 (E)
Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Terms and definitions .4
4 Safety precautions .5
5 General principles.5
5.1 General .5
5.2 Penetrant testing: description of the sub-method .5
5.3 Magnetic particle testing .7
6 Equipment .8
6.1 Magnetic particle testing equipment .8
6.2 Penetrant testing equipment .8
6.3 Actinic blue light sources .9
6.4 Viewing equipment .9
6.5 Measurement equipment . 10
7 Test products . 10
7.1 General . 10
7.2 Penetrant testing. 10
7.3 Magnetic particle testing . 11
8 Viewing conditions . 11
8.1 General . 11
8.2 Visual acuity . 12
8.3 Viewing conditions . 12
9 Verification and calibration of instruments . 12
10 Qualification records . 13
11 Test report . 13
Annex A (normative) Measurement of fluorescent coefficient . 14
A.1 Apparatus . 14
A.2 Preparation of filter paper specimens, penetrant material test . 14
A.3 Method . 14
A.4 Calculation . 15
Bibliography . 16

2

---------------------- Page: 4 ----------------------

SIST-TP CEN/TR 16638:2014
CEN/TR 16638:2014 (E)
Foreword
This document (CEN/TR 16638:2014) has been prepared by Technical Committee CEN/TC 138 “Non-
destructive testing”, the secretariat of which is held by AFNOR.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
3

---------------------- Page: 5 ----------------------

SIST-TP CEN/TR 16638:2014
CEN/TR 16638:2014 (E)
1 Scope
This Technical Report specifies the requirements for penetrant and magnetic particle testing, the materials
and viewing conditions when using fluorescent detection media excited by actinic blue light.
It is not intended that this “sub-method” technique is used as a substitute for the existing colour contrast and
fluorescent techniques standardised in the EN ISO 3452 series and EN ISO 9934 series.
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 1330-7:2005, Non-destructive testing - Terminology - Part 7: Terms used in magnetic particle testing
CEN/TR 14748, Non-destructive testing - Methodology for qualification of non-destructive tests
EN ISO 3059, Non-destructive testing - Penetrant testing and magnetic particle testing - Viewing conditions
(ISO 3059)
EN ISO 3452-1:2013, Non-destructive testing - Penetrant testing - Part 1: General principles (ISO 3452-
1:2013)
EN ISO 3452-2:2013, Non-destructive testing - Penetrant testing - Part 2: Testing of penetrant materials (ISO
3452-2:2013)
EN ISO 3452-4, Non-destructive testing - Penetrant testing - Part 4: Equipment (ISO 3452-4)
EN ISO 9712, Non-destructive testing - Qualification and certification of NDT personnel (ISO 9712)
EN ISO 9934-1, Non-destructive testing - Magnetic particle testing - Part 1: General principles (ISO 9934-1)
EN ISO 9934-2, Non-destructive testing - Magnetic particle testing - Part 2: Detection media (ISO 9934-2)
EN ISO 9934-3, Non-destructive testing - Magnetic particle testing - Part 3: Equipment (ISO 9934-3)
EN ISO 12706:2009, Non-destructive testing - Penetrant testing - Vocabulary (ISO 12706:2009)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 12706:2009, EN 1330-7:2005
and the following apply.
3.1
actinic blue light
monochromatic blue light in a specific range which excites fluorescent penetrants and fluorescent magnetic
particles used for the purpose of non-destructive testing
4

---------------------- Page: 6 ----------------------

SIST-TP CEN/TR 16638:2014
CEN/TR 16638:2014 (E)
4 Safety precautions
Actinic blue light has the potential to rapidly cause injury to the retina. Precautions shall therefore be taken to
avoid direct vision of sources and reflections.
All relevant international, regional, national and local regulations including health and safety shall be taken into
account.
5 General principles
5.1 General
This sub-method of non-destructive testing comprises the use of fluorescent detection media with actinic blue
light for the purpose of detecting material imperfections. It is recommended that qualification of this sub-
method is carried out in accordance with CEN/TR 14748.
The actinic blue light sub-method may be suitable under specific conditions for example penetrant testing on
materials that fluoresce under UV-A irradiation or for detection of defects where some ambient light is present.
Implementation of the actinic blue light sub-method for magnetic particle testing may be particularly suitable
where the combination of detection media, viewing conditions and test method have been shown to provide
good contrast and defect visibility.
The fluorescent response of detection media for the actinic blue light sub-method shall not be assumed to be
the same as for conventional UV techniques.
To ensure adequate contrast and to eliminate actinic blue light reaching the inspectors eyes inspection shall
be carried out using suitable yellow or amber filters. For general inspection this is usually in the form of
contrast glasses.
WARNING — It has been shown that fluorescent detection media not developed for the actinic blue
light sub-method can show different behaviour in terms of sensitivity. Therefore sensitivity levels as
determined using UV shall not be used and there will be a need to demonstrate, that the sensitivity for
this sub-method is appropriate to the application.
An advice is given in 5.2.3 and 5.2.4 for penetrant testing as well as in 5.3.3 for magnetic particle testing
regarding tests to compare the flaw detecting capability with other methods or techniques using components
containing natural defects, with known defect standards. Tests shall be qualified by an appropriate method, for
example according to CEN/TR 14748.
It shall also be demonstrated that for the application the actinic blue light does not damage the detecting
media or the fluorescent stability.
Tests shall be documented.
5.2 Penetrant testing: description of the sub-method
5.2.1 General requirements
Penetrant testing within this sub-method is basically carried out as described in EN ISO 3452-1 but using
detection media specifically qualified for the application and actinic blue light for producing indications under
the viewing conditions defined herein. It is important to carry out techniques, and implement any referenced
standards, only to the extent covered by the qualification previously carried out.
5

---------------------- Page: 7 ----------------------

SIST-TP CEN/TR 16638:2014
CEN/TR 16638:2014 (E)
5.2.2 Process sequence
The sequence of operations is generally as illustrated in EN ISO 3452-1:2013, Annex A. However, only
penetrants qualified to this Technical Report shall be used.
Testing proceeds through the following stages:
a) preparation and precleaning: see EN ISO 3452-1:2013, 8.2;
b) application of penetrant: see EN ISO 3452-1:2013, 8.4;
c) excess penetrant removal and drying: see EN ISO 3452-1:2013, 8.5 except:
2
1) use blue light of a minimum of 3 W/m with no more than 150 lx ambient light at the surface of
the part, when the blue source is off; blue fluorescent tubes or domestic architectural LEDs
luminaries are convenient;
2) for the purpose of penetrant removal the blue light shall have a peak emission from 440 nm to
450 nm and a full width at half maximum (FWHM) of not more than 50 nm;
d) application of developer: see EN ISO 3452-1:2013, 8.6;
e) inspection: see EN ISO 3452-1:2013, 8.7 except 8.7.1 and
1) light sources shall be in accordance with 6.3;
2) viewing equipment shall be in accordance with 6.4;
3) viewing conditions shall be in accordance with 8.1;
4) for recording, if a camera is used, a filter similar to that described in 6.4.1 is needed;
f) postcleaning and protection: see EN ISO 3452-1:2013, 8.8;
g) retesting: see EN ISO 3452-1:2013, 8.9.
5.2.3 Effectiveness
The effectiveness of penetrant testing depends upon many factors including:
a) the types of penetrant materials;
b) the testing equipment;
c) surface preparation, condition and temperature;
d) the material under examination
e) expected discontinuities;
f) penetration and development time;
g) viewing conditions.
A substantiation test shall be carried out to demonstrate that the correct parameters are used.
6

---------------------- Page: 8 ----------------------

SIST-TP CEN/TR 16638:2014
CEN/TR 16638:2014 (E)
Effectiveness can be best demonstrated using known defect standards containing defects or artificial defects
of various sizes (e.g. EN ISO 3452-3, type 2) comparing the results obtained using the conventional UV
method with the results of this blue light sub-method (see Figure 1). Other test panels (e.g. EN ISO 3452-3,
type 1) may be adequate for use, but may provide less information.

a) UV-A

b) actinic blue light
Figure 1 — UV-A vs. actinic blue light showing acceptable results
5.2.4 Sensitivity
Sensitivity levels shall be specifically defined for this sub-method. Sensitivity levels defined using UV-A light in
EN ISO 3452-2 do not apply.
The fluorescence of the detection media will have an effect on sensitivity. The fluorescent coefficient can be
measured in cd/W and, if appropriate, compared with the fluorescent coefficient using UV radiation to obtain a
fluorescent factor.
...