SIST EN ISO 9934-2:2004

SLOVENSKI STANDARD
SIST EN ISO 9934-2:2004
01-marec-2004
Neporušitveno preskušanje – Preskušanje z magnetnimi delci – 2. del: Sredstva za
preiskave (ISO 9934-2:2002)
Non-destructive testing - Magnetic particle testing - Part 2: Detection media (ISO 9934-
2:2002)
Zerstörungsfreie Prüfung - Magnetpulverprüfung - Teil 2: Prüfmittel (ISO 9934-2:2002)
Essais non destructifs - Magnétoscopie - Partie 2: Produits magnétoscopiques (ISO
9934-2:2002)
Ta slovenski standard je istoveten z: EN ISO 9934-2:2002
ICS:
19.100 Neporušitveno preskušanje Non-destructive testing
SIST EN ISO 9934-2:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 9934-2:2004

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SIST EN ISO 9934-2:2004
EUROPEAN STANDARD
EN ISO 9934-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2002
ICS 19.100
English version
Non-destructive testing - Magnetic particle testing - Part 2:
Detection media (ISO 9934-2:2002)
Essais non destructifs - Magnétoscopie - Partie 2: Produits Zerstörungsfreie Prüfung - Magnetpulverprüfung - Teil 2:
magnétoscopiques (ISO 9934-2:2002) Prüfmittel (ISO 9934-2:2002)
This European Standard was approved by CEN on 14 July 2002.
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 Management Centre 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, 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
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9934-2:2002 E
worldwide for CEN national Members.

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SIST EN ISO 9934-2:2004
EN ISO 9934-2:2002 (E)
Contents
page
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms and definitions.4
4 Safety precautions.5
5 Classification.5
5.1 General.5
5.2 Magnetic inks .5
5.3 Powders .5
6 Testing and test certificate .5
6.1 Type testing and batch testing.5
6.2 In service testing.5
7 Requirements and test methods .5
7.1 Performance .5
7.2 Colour.6
7.3 Particle size .6
7.4 Temperature resistance .6
7.5 Fluorescent coefficient and fluorescent stability.6
7.6 Fluorescence of carrier liquid.8
7.7 Flash point.8
7.8 Corrosion induced by detection media .8
7.9 Viscosity of the carrier liquid.8
7.10 Mechanical stability .8
7.11 Foaming .9
7.12 pH 9
7.13 Storage stability .9
7.14 Solids content .9
7.15 Sulphur and halogen content .9
8 Testing requirements .10
9 Test report .10
10 Packaging and labelling.10
Annex A (normative)  Procedure for type, batch and in service testing .13
Annex B (normative)  Reference blocks .15
Annex C (normative)  Corrosion testing of steel .20
Bibliography .24
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SIST EN ISO 9934-2:2004
EN ISO 9934-2:2002 (E)
Foreword
This document EN ISO 9934-2:2002 has been prepared by Technical Committee CEN/TC 138 "Non-destructive
testing", the secretariat of which is held by AFNOR, in collaboration with Technical Committee ISO/TC 135
"Non-destructive testing".
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 June 2003, and conflicting national standards shall be withdrawn at the latest by
June 2003.
Annexes A, B and C are normative
This standard consists of the following parts:
EN ISO 9934-1, Non-destructive testing - Magnetic particle testing - Part 1: General principle (ISO 9934-1:2001).
EN ISO 9934-2, Non-destructive testing - Magnetic particle testing - Part 2: Detection media (ISO 9934-2:2002).
EN ISO 9934-3, Non-destructive testing - Magnetic particle testing - Part 3: Equipment (ISO 9934-3:2002).
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,
Sweden, Switzerland and the United Kingdom.
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SIST EN ISO 9934-2:2004
EN ISO 9934-2:2002 (E)
1 Scope
This European Standard specifies the significant properties of magnetic particle testing products (including
magnetic ink, powder, carrier liquid, contrast aid paints) and the methods for checking their properties.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN 1330-1, Non destructive testing - Terminology - Part 1: List of general terms.
EN 1330-2, Non destructive testing - Terminology - Part 2: Terms common to the non-destructive testing methods.
EN 10083-1, Quenched and tempered steels - Part 1: Technical delivery conditions for special steels.
EN 10204, Metallic products - Types of inspection documents.
EN 12157, Rotodynamic pumps - Coolant pumps units for machine tools - Nominal flow rate, dimensions.
EN ISO 2160, Petroleum products - Corrosiveness to copper - Copper strip test (ISO 2160:1998).
EN ISO 3059, Non-destructive testing - Penetrant testing and magnetic particle testing - Viewing conditions (ISO
3059:2001).
EN ISO 3104, Petroleum products - Transparent and opaque liquids - Determination of kinematic viscosity and
calculation of dynamic viscosity (ISO 3104:1994).
EN ISO 9934-1, Non-destructive testing - Magnetic particle testing - Part 1: General principle (ISO 9934-1:2001).
EN ISO 9934-3, Non-destructive testing - Magnetic particle testing - Part 3: Equipment (ISO 9934-3:2002).
prEN ISO 12707, Non-destructive testing - Terminology - Terms used in magnetic particle testing
(ISO/DIS 12707:2000).
ISO 2591-1, Test sieving - Part 1: Methods using test sieves of woven wire cloth and perforated metal plate.
ISO 4316, Surface active agents - Determination of pH of aqueous solutions - Potentiometric method.
3 Terms and definitions
For the purposes of this European Standard, the terms and definitions given in EN 1330-1, EN 1330-2 and
prEN ISO 12707 together with the following apply.
3.1
batch
quantity of material produced during one manufacturing operation having uniform properties throughout and with a
unique identifying number or mark
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SIST EN ISO 9934-2:2004
EN ISO 9934-2:2002 (E)
4 Safety precautions
The materials used in magnetic particle inspection and those used in their testing include chemicals that can be
harmful, flammable and/or volatile. All necessary precautions should be observed. All relevant regulations,
including national and local regulations pertaining to health and safety, anti-pollution requirements etc., shall be
observed.
5 Classification
5.1 General
The magnetic particle materials covered by this specification shall be classified as follows.
5.2 Magnetic inks
Magnetic inks shall consist of finely divided coloured or fluorescent magnetic particles in a suitable carrier liquid.
They shall form a uniform suspension when agitated.
Magnetic inks may be produced from products supplied as concentrates, including paste and powders, or ready for
use.
5.3 Powders
Powders for the dry technique shall consist of finely divided coloured and/or fluorescent magnetic particles.
6 Testing and test certificate
6.1 Type testing and batch testing
Type testing and batch testing of magnetic particle materials shall be carried out in accordance with the
requirements of EN ISO 9934-1, EN ISO 9934-2, and EN ISO 9934-3.
Type testing is carried out in order to demonstrate suitability of a product for the intended use. Batch testing is
carried out in order to demonstrate conformity of the characteristics of a batch to the product type specified.
The supplier shall provide a test certificate showing compliance with this standard having used the methods
detailed. This certificate shall include results obtained and tolerances allowed.
If any changes are made to the detection media, then a new type test shall be performed.
6.2 In service testing
In service testing is carried out to demonstrate the continued performance of the detection media.
7 Requirements and test methods
7.1 Performance
7.1.1 Type testing and batch testing
Type testing and batch testing shall be carried out according to annex A using the reference blocks types 1 or 2 as
described in annex B.
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SIST EN ISO 9934-2:2004
EN ISO 9934-2:2002 (E)
7.1.2 In service testing
In service testing shall be carried out according to annex A using one of the reference blocks types 1 or 2 as
described in annex B or a test block which exhibit similar discontinuities to those normally found in components
typically processed in the equipment.
7.1.3 Contrast aid paints
Type testing and batch testing shall be carried out according to 7.1.1 after having applied the paint in accordance
with the manufacturer instructions and using a type test approved, compatible magnetic ink.
7.2 Colour
The colour of magnetic particles detection media under working conditions shall be stated by the supplier.
The colour of the batch test sample shall not differ from the colour of the type test sample when visually compared.
7.3 Particle size
7.3.1 Method
The method for determination of particle size is dependent on the range of the particle size distribution.
NOTE For magnetic inks the particle-size-distribution can be determined by the Coulter Method or an equivalent method
(see Bibliography).
7.3.2 Definition of the particle size
The range of particle size shall be as follows:
-lower diameter d : no more than 10 % of the particles shall be smaller than d ;
l l
-average diameter d : 50 % of the particles shall be larger and 50 % smaller than d ;
a a
-upper diameter d : no more than 10 % of the particles shall be larger than d .
u u
7.3.3 Requirements
d and d shall be reported. For magnetic inks sizes shall lie in the range d > 1,5 μm and d < 40 μm.
d
l, a u l u
NOTE For powders d is generally > 40 μm.

l
7.4 Temperature resistance
There shall be no degradation of the product after 5 minutes heating at the maximum temperature specified by the
supplier. This shall be verified by repeating the performance test as specified in 7.1.1.
7.5 Fluorescent coefficient and fluorescent stability
To carry out these tests it is necessary to use dry powder. For magnetic inks the magnetic particle solid content
shall be used.
7.5.1 Type testing
7.5.1.1 Method
The fluorescent coefficient b in cd/W is defined as follows:
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SIST EN ISO 9934-2:2004
EN ISO 9934-2:2002 (E)
b = L/E
e
where L = luminance in cd/m² of a plane powder surface;
E = level of UV-irradiance in W/m² at the surface of the powder.
e
The arrangement of the apparatus used is shown in Figure 1.
The powder surface shall be evenly irradiated with UV(A) at an angle of 45° (– 5°). Luminance shall be measured
with a suitable meter with an accuracy of – 10 %. It shall measure the luminance from the powder surface and be
unaffected by areas outside of the target area. The level of irradiance shall be measured with a meter conforming
to EN ISO 3059 with its UV sensor replacing the powder surface.
Key
1 Measurement of luminance
2 Lamp
3 UV radiation
4 Measurement point of the irradiance
5 Powder surface
Figure 1 - Determination of the fluorescent coefficient b for magnetic particles
NOTE A recommended arrangement is using a luminance meter with a 200 cd/m² range and a viewing angle (a) of 20º
placed 80 mm above the plane powder surface, diameter 40 mm. UV (A) lamps are placed so as to give an even irradiance at
the powder surface, with E between 10 W/m² and 15 W/m².
e
7.5.1.2 Requirements
The fluorescent coefficient (b) shall be greater than 1,5 cd/W.
7.5.1.3 Fluorescence stability
The sample shall first be tested according to the method described in 7.5.1.1.
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SIST EN ISO 9934-2:2004
EN ISO 9934-2:2002 (E)
The sample shall then be exposed and re-tested as described in 7.5.1.1 after 30 minutes of exposure to UV-A
irradiance of 20 W/m² (minimum). The fluorescent coefficient shall not decrease more than 5 %.
7.5.2 Batch testing
Batch testing shall be carried out according to 7.5.1.1. The fluorescent coefficient shall be within 10 % of the type
test value.
7.6 Fluorescence of carrier liquid
The fluorescence of the carrier liquid shall be checked by visually comparing with quinine sulphate solution when
irradiated with UV-A of at least 10 W/m².
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The concentration of the quinine sulphate solution shall be 7 · 10 M (5,5 ppm) in 0,1 N H SO .
2 4
The carrier liquid under test shall exhibit no more fluorescence than the quinine sulphate solution.
7.7 Flash point
For magnetic inks, other than water based, the flash point (open cup method
...