oSIST prEN 168:2007
(Main)Personal eye-protection - Non-optical test methods
Personal eye-protection - Non-optical test methods
This European Standard specifies non-optical test methods for eye-protectors, the requirements for which are contained in other European Standards.
Persönlicher Augenschutz - Nichtoptische Prüfverfahren
Protection individuelle de l'oil - Méthodes d'essais autres qu'optiques
La présente Norme européenne spécifie les méthodes d'essais autres qu'optiques pour les protecteurs oculaires dont les spécifications sont données dans d'autres Normes européennes.
Il est possible d'utiliser d'autres méthodes s’il est démontré qu'elles sont équivalentes.
Les méthodes d'essais optiques font l'objet du prEN 167.
Une définition des termes employés est donnée dans l’EN 165.
Osebno varovanje oči - Metode neoptičnih preskusov
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 168:2007
01-december-2007
2VHEQRYDURYDQMHRþL0HWRGHQHRSWLþQLKSUHVNXVRY
Personal eye-protection - Non-optical test methods
Persönlicher Augenschutz - Nichtoptische Prüfverfahren
Protection individuelle de l'oil - Méthodes d'essais autres qu'optiques
Ta slovenski standard je istoveten z: prEN 168
ICS:
13.340.20 Varovalna oprema za glavo Head protective equipment
oSIST prEN 168:2007 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
DRAFT
prEN 168
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2007
ICS 13.340.20 Will supersede EN 168:2001
English Version
Personal eye-protection - Non-optical test methods
Persönlicher Augenschutz - Nichtoptische Prüfverfahren
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 85.
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 Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland 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
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 168:2007: E
worldwide for CEN national Members.
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prEN 168:2007 (E)
Contents
page
Foreword.4
1 Scope .5
2 Normative references .5
3 Test for increased robustness .5
3.1 Unmounted oculars .5
3.2 Complete eye-protectors and frames .7
4 Test for minimum robustness of oculars with filtering effect and cover plates .8
4.1 Apparatus .8
4.2 Procedure .8
5 Test for stability at elevated temperature .9
5.1 Apparatus .9
5.2 Procedure .9
6 Test for resistance to ultraviolet radiation.10
6.1 Apparatus .10
6.2 Procedure .10
7 Test for resistance to ignition .10
7.1 Apparatus .10
7.2 Procedure .10
8 Test for resistance to corrosion.10
9 Test for resistance to high-speed particles and resistance to high speed particles at extremes
of temperature.11
9.1 Apparatus .11
9.2 Procedure .11
10 Test for protection against molten metals .12
10.1 Test for non-adherence of molten metals .12
10.2 Test for area of coverage of face shields.14
11 Test for resistance to penetration by hot solids .16
11.1 Apparatus .16
11.2 Procedure .16
12 Test for protection against droplets and liquid splashes.17
12.1 Test for protection against droplets (for goggle type eye-protectors) .17
12.2 Test for protection against liquid splashes (for face-shields) .17
13 Test for protection against large dust particles .17
13.1 Apparatus .17
13.2 Procedure .19
13.3 Evaluation.19
14 Test for protection against gases and fine dust particles.20
14.1 Apparatus .20
14.2 Procedure .21
14.3 Evaluation.21
15 Test for resistance to surface damage by fine particles .21
15.1 Apparatus .21
15.2 Samples .22
15.3 Procedure .22
15.4 Evaluation.22
16 Test for resistance to fogging of oculars.24
16.1 Apparatus .24
16.2 Samples .25
16.3 Procedure and evaluation.25
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prEN 168:2007 (E)
17 Head-form.27
18 Assessment of Field of Vision .29
19 Assessment of lateral protection.30
19.1 Apparatus .30
19.2 Procedure .30
19.3 Evaluation.30
20 Test for protection against radiant heat.31
20.1 Principle.31
20.2 Apparatus .31
20.3 Procedure .32
Annex A (informative) Uncertainty of measurement and results interpretation.34
A.1 Test report and uncertainty of measurement .34
Annex B (informative) Significant technical changes between this European Standard and the
previous edition .36
Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other
provisions of EU Directives.37
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prEN 168:2007 (E)
Foreword
This document (prEN 168:2007) has been prepared by Technical Committee CEN/TC 85 “Eye protective
equipment”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 168:2001.
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 EC Directive(s).
For relationship with EC Directive(s), see informative Annex ZA which is an integral part of this document.
Annex B provides details of significant technical changes between this European Standard and the previous
edition:
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prEN 168:2007 (E)
1 Scope
This European Standard specifies non-optical test methods for eye-protectors, the requirements for which are
contained in other European Standards.
Alternative test methods may be used if shown to be equivalent.
The optical test methods are given in prEN 167.
A definition of terms is given in EN 165.
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 165, Personal eye-protection — Vocabulary.
prEN 166:2007, Personal eye-protection — Specifications.
prEN 167:2007, Personal eye-protection — Optical test methods.
EN 136:1998, Respiratory protective devices - Full face masks - Requirements, testing, marking.
EN ISO 6942:2002, Protective clothing - Protection against heat and fire - Method of test : evaluation of materials
and material assemblies when exposed to a source of radiant heat.
ISO 565, Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal sizes of
openings.
3 Test for increased robustness
New specimens shall be used for this test.
3.1 Unmounted oculars
3.1.1 Apparatus
The support for the ocular (see Figure 1) shall be a steel or rigid plastic cylinder with an internal diameter of
(35,0 ± 0,1) mm and an outside diameter of (41,0 ± 0,1) mm. The cylinder shall be inserted into, or be an integral
part of a steel base. The ocular shall be cushioned by a silicone seating ring firmly attached to the top of the tube.
This seating ring shall be made of silicone rubber of (40 ± 5) I.R.H.D and shall have an inside diameter of
(35,0 ± 0,4) m and cross sections of 3 mm x 3 mm nominal dimensions.
The combined mass of the support shall be at least 12 kg.
A load ring of mass (250 ± 5) g is placed on the ocular. The ring has an inside diameter the same as that of the
support tube, and any convenient outside diameter. A silicone seating ring having the same dimensions and
hardness as the one attached to the top of the support tube is placed between the load ring and the ocular. A piece
of carbon paper on a piece of white paper is placed at the base of the 1,5 mm deep cavity in the ocular support
(see Figure 1).
For curved oculars with a cylindrical component, the test support tube and load ring shall be curved to conform to
the concave and convex surfaces of the ocular respectively, and the dimensions of 3 mm and 4,5 mm shall apply to
the deepest point of the circular support. (See Figure 1).
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prEN 168:2007 (E)
If the ocular is of insufficient dimensions to enable its entire periphery to be adequately supported, suitable adaptor
sleeves shall be used.
3.1.2 Procedure
Centre the intended points of impact of the ocular on the support tube. Adjust the apparatus so that a 22 mm
+0
nominal diameter steel ball of 43 g minimum mass falling from (1,3 ) m strikes the ocular within a 5 mm radius
−0,03
from the centre of the support tube. This height will provide an impact speed of approximately 5,1 m/s.
Impacts shall be directed at the visual centre(s) of the oculars. For unmounted oculars covering one eye and for
which the visual centre cannot be established, then the geometric centre shall be used.
NOTE Visual centre is as defined in EN 166.
The impacts are carried out in the following conditions:
a) with the ocular heated to (55 ± 2) °C and maintained at this temperature for at least 1 h;
b) with the ocular cooled to a temperature of (-5 ± 2) °C and maintained at this temperature for at least 1 h.
New oculars shall be used for each individual impact and for each temperature condition. The impact shall be
applied within 30 s of temperature conditioning.
The test shall be carried out at (23 ± 5) °C.
Dimensions in millimetres (nominal unless toleranced)
Key
1 Supporting plate (12 kg minimum)
2 Silicone seating rings
3 Ocular
4 Load ring (250 ± 5) g
5 Carbon paper on white paper
Figure 1 — Holding device for oculars for the increased robustness test
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prEN 168:2007 (E)
3.2 Complete eye-protectors and frames
3.2.1 Apparatus
3.2.1.1 Appropriate head-form, as defined in clause 17.
3.2.1.2 A device enabling a 22 mm nominal diameter steel ball of 43 g minimum mass to be projected at a
specified point on the eye-protector at a speed of approximately 5,1 m/s.
3.2.2 Procedure
The eye-protector to be tested shall be placed on the appropriate head-form in the position corresponding to
normal use.
If the frame only is to be assessed then oculars meeting the requirements of 3.1 (increased robustness) shall be
fitted to the frame.
A sheet of carbon paper on top of a sheet of white paper is attached to the head-form behind the eye-protector.
The head-form and eye-protector assembly is positioned in the test apparatus.
The ball is projected at the points of impact defined in 3.2.3.
For spectacles with no lateral protection the ball shall strike the sidearm within the prescribed lateral protection area
on a vertical plane through the impact centre. (See 3.2.3).
The impacts are carried out in the following conditions:
a) with the eye-protector heated to (55 ± 2) °C and maintained at this temperature for at least 1 h;
b) with the eye-protector cooled to a temperature of (-5 ± 2) °C and maintained at this temperature for at least 1 h.
New eye-protectors shall be used for each individual point of impact and for each temperature condition. The
impact shall be applied within 30 s of temperature conditioning.
The tests shall be conducted at an ambient temperature of (23 ± 5) °C.
3.2.3 Points of impact
There are four impact points, and these are defined with respect to the head-form rather than the eye-protector.
The ball is aimed at these impact points with the eye-protector mounted in the normal use position.
The impact points shall be considered as any single point within a 10 mm radius of one of four impact centres.
These impact centres are denoted by an asterisk (*) in Figure 11.
With respect to the test schedule contained in EN 166, the four impact points are defined as follows:
1. the left eye frontal;
2. the right eye frontal;
3. the left eye side;
4. the right eye side.
For frontal impacts at the two eye centres the ball is projected normal to the vertical axis of the head-form and
parallel to its optical axis along each line of sight.
For lateral impacts the head-form is rotated about its vertical axis by 90° (left and right) from the frontal impact
position.
The head-form may be moved horizontally and vertically to select any single impact point lying within 10 mm of the
specified impact centres.
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prEN 168:2007 (E)
As stated in 3.2.2, new eye-protectors shall be used for each individual impact.
4 Test for minimum robustness of oculars with filtering effect and cover plates
New specimens are used for this test.
4.1 Apparatus
See Figure 2.
4.1.1 Loading device
A steel ball of 22 mm nominal diameter is fastened to the lower end of a tube, whose length is 70 mm nominal.
The total loading mass is such that the force acting on the ocular is (100 ± 2) N.
4.1.2 Specimen support
The support for the ocular (see Figure 2) shall be a steel cylinder with an internal diameter of (35,0 ± 0,1) mm and
an outside diameter of (41,0 ± 0,1) mm. The cylinder shall be inserted into, or be part of, a steel base.
The specimen is placed between two seating rings made of silicone rubber of (40 ± 5) I.R.H.D. having an inside
diameter of (35,0 ± 0,4) mm and cross sections of 3 mm x 3 mm nominal dimensions. The silicone seating rings are
fixed to the steel supporting plate and the load ring respectively.
If the specimen ocular is of insufficient dimensions to enable its entire periphery to be adequately supported,
suitable adaptor sleeves shall be used.
The load ring shall have a mass of (250 ± 5) g. By its weight, it presses the upper silicone seating ring against the
upper surface of the specimen.
A sheet of carbon paper on top of a sheet of white paper is placed on the supporting steel plate at the base of
the 1,5 mm deep cavity.
4.2 Procedure
4.2.1 The test is carried out at (23 ± 5) °C.
4.2.2 Align the central vertical axis of the loading tube with that of the specimen support.
4.2.3 Position the specimen on the support with the ”eye side” downwards and place the load ring on the
specimen. For curved oculars with a cylindrical component the supporting plate and the load ring are curved to
conform to the surface of the ocular, and the dimensions of 3 mm and 4,5 mm shall apply to the deepest point of
the circular support.
4.2.4 Adjust the position of the specimen such that the load ring axis (4.2.2) passes through the visual centre of
the specimen. If the visual centre cannot be established the geometric centre shall be used.
NOTE Visual centre is as defined in EN 166.
4.2.5 The loading mass is lowered on to the ocular at a speed not exceeding 400 mm/min. The force
of (100 ± 2) N is maintained for (10 ± 2) s. The loading mass is then removed.
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prEN 168:2007 (E)
Dimensions in millimetres (nominal unless toleranced)
Key
1 Supporting plate
2 Silicone seating rings
3 Guiding block
4 Loading mass (100 ± 2) N
5 Steel ball
6 Load ring (250 ± 5) g
7 Carbon paper on white paper
8 Ocular
Figure 2 — Apparatus for minimum robustness (static deformation) test
5 Test for stability at elevated temperature
New specimens are used for this test.
5.1 Apparatus
Oven, capable of maintaining a temperature of (55 ± 2) °C.
5.2 Procedure
Place the specimen in a position corresponding to normal use, in the oven for (60 ± 5) min at a temperature of
(55 ± 5) °C. Then remove it and allow to stabilise at (23 ± 5) °C for a minimum of 60 min prior to visual examination.
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prEN 168:2007 (E)
6 Test for resistance to ultraviolet radiation
6.1 Apparatus
Fused-silica envelope high-pressure xenon lamp. The power of the lamp shall be between 400 W and 500 W, with
a preferred value of 450 W. The spectral transmittance of the lamp envelope shall be at least 30 % at 200 nm.
NOTE Suitable lamp references are XBO-450 W/4 and CSX-450 W/4. These lamps produce UV radiation with an
appreciable amount of UVC radiation. This is appropriate, since industrial processes (for example, welding) produce appreciable
amounts of UVC radiation.
WARNING Precautions should be taken against potential generation and build up of ozone.
6.2 Procedure
New specimens are used for this test. The test equipment is operated within an environment of temperature
(23 ± 5) °C.
Expose the external face of the ocular to radiation from a fused silica envelope high-pressure xenon lamp (see 6.1).
The angle of incidence of the radiation on the specimen surface shall be essentially perpendicular. The distance
from the axis of the lamp to the nearest point on the sample shall be (300 ± 10) mm. The exposure time shall be
(50 ± 0,2) h at a lamp power of 450 W.
New lamps shall be burned in for (50 ± 0,2) h.
7 Test for resistance to ignition
7.1 Apparatus
7.1.1 Steel rod, (300 ± 3) mm long and 6 mm nominal diameter with end faces which are flat and perpendicular
to its longitudinal axis.
7.1.2 Heat source.
7.1.3 Thermocouple and temperature indicating device.
7.1.4 Timer, capable of measuring an elapsed time of 10 s with an uncertainty of ± 0,1 s.
7.2 Procedure
Heat one end of the steel rod over a length of at least 50 mm to a temperature of (650 ± 20) °C. Measure the
temperature of the rod by means of the thermocouple attached at a distance of (20 ± 1) mm from the heated end of
the rod. Press the heated face of the rod (long axis vertically) against the surface of the test sample (the contact
force being equal to the weight of the rod) for a period of (5,0 ± 0,5) s, and then remove it.
Carry out the test on all externally exposed parts of the eye-protector, except elastic headbands and textile edging.
Carry out a visual inspection during the test in order to establish whether the test samples ignite or continue to
glow.
The tests are performed in an environment of temperature (23 ± 5) °C.
8 Test for resistance to corrosion
Remove all contamination, particularly oil and grease from the metal parts of the specimen.
Immerse the specimen for (15 ± 1) min in a boiling, aqueous, (10,0 ± 0,5) % by mass solution of sodium chloride.
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prEN 168:2007 (E)
Remove the specimen from this solution and immerse immediately in a (10,0 ± 0,5) % by mass aqueous solution of
sodium chloride at room temperature for (15 ± 1) min.
Remove from this solution and without wiping off the adhering liquid, leave to dry for (24 ± 1) h at (23 ± 5) °C. Rinse
in lukewarm water and leave to dry before inspecting.
9 Test for resistance to high-speed particles and resistance to high speed particles at
extremes of temperature
New specimens shall be used for this test and each specimen shall only be subjected to one impact.
9.1 Apparatus
9.1.1 Head-form
Appropriate head-form, as defined in clause 17.
9.1.2 Propulsion equipment
The apparatus shall be capable of imparting known speeds of up to 195 m/s to a 6 mm nominal diameter steel ball
of 0,86 g minimum mass.
NOTE 1 The apparatus consists fundamentally of a barrel or tube of sufficient length to ensure a reproducible exit speed of
the steel ball, with a breech or loading mechanism ensuring that the ball is in a given position in relation to the tube or barrel
end, and of a spring or compressed gas to provide propulsion.
The apparatus also includes a means of calibrating or measuring the exit speed of the ball; because of the speed
and distances involved, a timing indicator, recording in multiples of not greater than 10 µs is required.
The measurement of speed should be made as near as possible to the point of impact. The end of the barrel or
tube should be protected against ricochets.
The area surrounding the test specimen, the head-form and the barrel or tube should be enclosed.
NOTE 2 The tube length should be chosen to ensure that the required speed for the ball is achieved.
NOTE 3 For the time measurement, a method using an electronic timer operated by photoelectric cells through amplifiers
has been found suitable.
The distance between the sensing elements should not exceed 150 mm.
9.2 Procedure
9.2.1 Resistance to high speed particles
Place the eye-protector to be tested on the head-form in the position corresponding to normal use and with the
tension of the headband, if fitted, adjusted according to the manufacturer's instructions.
Insert a sheet of carbon paper on top of a sheet of white paper, between the eye-protector and the head-form.
Position the eye-protector/head-form assembly in front of the propulsion equipment, the point of impact being not
more than 250 mm from the exit end of the speed sensing equipment.
Project the steel ball at one of the speeds specified in EN 166. The points of impact are the same as those defined
for the increased robustness test in 3.2.3. The ambient temperature shall be (23 ± 5) °C.
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prEN 168:2007 (E)
9.2.2 Resistance to high speed particles at extremes of temperature
The procedure is as 9.2.1 but with the impacts carried out under the following conditions:
a) with the ocular heated to (55 ± 2) °C and maintained at this temperature for at least 1 h;
b) with the ocular cooled to a temperature of (-5 ± 2) °C and maintained at this temperature for at least 1 h.
New oculars shall be used for each individual impact and for each temperature condition. The impact shall be
applied within 30 s of tempe
...
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