Personal eye-protectors - Non-Optical. test methods
Pro tecteurs individuels de /keil - Mthodes d’essai autres qu’optiques
First edition - 1981-04-01
z UDC 614.893 Ref. No. ISO4855-1981 (E)
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Descriptors : accident prevention, eyes, eyeglasses, safety devices, tests, impact tests, thermal tests, ultraviol’et radiation, flammability testing, corrosion tests, Chemical tests, gas resistance tests.
Price based on 9 pages
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national Standards institutes (ISO member bedies). The work of developing Inter- national Standards is carried out through ISO technical committees. Every member body interested in a subject for which a technical committee has been set up has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council.
International Standard ISO 4855 was developed by Technical Committee ISO/TC 94, Personal safety - Protective clothing and equipment, and was circulated to the member bodies in July 1978.
lt has been approved by the member bodies of the following countries :
Australia I reland
Austria Israel
Belgium Italy
Czechoslovakia Mexico
France Netherlands
Germany, F. R. New Zealand
Hungary Norway
Iran Poland
The member bodies of on technical grounds :
0
the followi ng countries expressed
Romania
South Africa, Rep. of Spain
Switzerland USA USSR
Denmark United Kingdom
International Organkation for Standardkation, 1981
pproval of the document
Printed in Switzerland
ii
Contents
Page1 Scope and field of application ... 1
2 References ... 1
3 Test for robustness of the eye-protectors ... 2
4 Test for stability at elevated temperature . . . ..“... 3
5 Test for resistance to ultra-violet radiation . . . ..*... 3
6 7 8 9 10 11 12 13 14 Test for ignition . . . 3
Test for resistance to corrosion ... 4
Test for suitability for disinfection ... 4
Test for resistance to high-speed particles ... ... 4
Test for non-adherence of molten metal ... 5
Test for resistance to Penetration of hot solids ... 7
Test for proof against Chemical droplets ... 7
Test for protection against dust ... 8
Test for protection against gas ... 9
Ill
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Personal eye-protectors - Non-Optical test methods
1 Scope and field of application
This International Standard specifies the non-Optical test methods for eye-protectors the requirements for which are given in ISO 4849 to 4853.1)
The Optical test methods are given in ISO 4854.
PRELIMINARY REMARK - Of the tests described, the test for stability at elevated temperature should be carried out first on eye-protectors, generally followed by the test for robustness.
2 References
ISO 565, Test sieves - Wo ven metal wire clo th and perfora ted plate - Nominal sizes of apertures.
I S 0 4949, Personal eye-pro tec tors - Specifica tions.
ISO 4850, Personal eye-protectors for welding and related techniques - Filters - Utilisa tion and transmittance re- quiremen ts.
ISO 4851, Personal eye-protectors - Ultraviolet filters - Utilisa tion and transmittance requiremen ts.
ISO 4952, Personal eye-pro tectors - lnfrared filters - Utilisa- tion and transmittance requiremen ts.
ISO 4954, Personal eye-protectors - Optical test methods.
1) In preparation : I SO 4853, Personal e ye-pro tectors - Da yligh t filters - Utiliza tion and transmittance requiremen ts.
3 Test for robustness of the eye-protectors
This test applies to eye-protectors whose primary function is to protect against high-mass, low-velocity flying objects.
3.1 Unmounted oculars
3.1.1 Apparatus
The apparatus is shown in figure 1.
The immediate support for the ocular shall be a steel or rigid plastics cylinder with an internal diameter of 25 + $” m m and an outside diameter of 32 mm. The cylinder shall be inserted into, or be an integral part of, a steel base. The ocular shall be cushioned by a seating ring firmly attached to the top of the tube. This seating shall have a thickness of 3 m m and the same inside and outside diameters as the tube. The seating material shall have a hardness of 40 -1: 5 IRHD. The combined mass of the support assembly shall be at least 12 kg.
A load ring of mass 250 g shall be placed upon the ocular. This ring shall have an inside diameter the same as that of the sup- port tube, and any convenient outside diameter. A setting ring having the same dimensions and hardness as the support tube seating ring (gasket) shall be placed between the load ring and the ocular.
Sample
Joints
Tube
For cylindrically curved oculars, the test support tube and load ring shall be curved to conform to the convex and concave sur- faces of the ocular respectively.
3.1.2 Procedure
Centre the ocular approximately on the support tube. Adjust the apparatus so that a 22 m m diameter steel ball of 44 g mass falling from 1,3 _ i 03 m, strikes the ocular within an 8 m m radius from the centre of the support tube.
For plastics or laminated oculars, the temperature in the test area shall be 23 + 3 OC. For oculars made solely from glass, normal room temperature shall apply.
Alternative tests may be used, provided that it tan be demonstrated that they give equivalent results.
3.2 Mounted oculars
3.2.1 Head-form
The head-form shall be made of a suitable material having a hardness of 50 to 60 IRHD. The dimensions shall conform to those of the appropriate national head-form of which figure 2 Shows an example.
Dimensions in miilimetres
H- Load ring
Figure 1 - Apparatus for test for robustness of unmounted oculars
