ISO 3917:2016

DRAFT INTERNATIONAL STANDARD
ISO/DIS 3917
ISO/TC 22/SC 11 Secretariat: ANSI
Voting begins on: Voting terminates on:
2014-03-24 2014-06-24
Road vehicles — Safety glazing materials — Test methods
for resistance to radiation, high temperature, humidity, fire
and simulated weathering
Véhicules routiers — Vitrages de sécurité — Méthodes d’essai de résistance au rayonnement, aux
températures élevées, à l’humidité, au feu et aux conditions climatiques simulées
[Revision of third edition (ISO 3917:1999)]
ICS: 43.040.65;81.040.30
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 3917:2014(E)
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. ISO 2014

---------------------- Page: 1 ----------------------
ISO/DIS 3917:2014(E)

Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as
permitted under the applicable laws of the user’s country, neither this ISO draft nor any extract
from it may be reproduced, stored in a retrieval system or transmitted in any form or by any means,
electronic, photocopying, recording or otherwise, without prior written permission being secured.
Requests for permission to reproduce should be addressed to either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
ii © ISO 2014 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/DIS 3917
Contents Page
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test conditions . 1
5 Application of test . 1
6 Radiation test . 2
6.1 Principle. 2
6.2 Apparatus . 2
6.2.1 Radiation source . 2
6.2.2 Power supply . 2
6.2.3 Device for mounting and rotating the test specimens . 2
6.3 Test specimen . 2
6.4 Expression of results . 2
7 High temperature test . 3
7.1 Principle. 3
7.2 Procedure . 3
7.3 Expression of results . 3
8 Humidity test . 3
8.1 Principle. 3
8.2 Procedure . 3
8.3 Expression of results . 4
9 Fire Resistance Test . 4
9.1 Principle. 4
9.2 Apparatus . 4
9.3 Test specimens . 4
9.4 Test Procedure . 4
10 Resistance to simulated weathering . 6
10.1 Principle. 6
10.2 Exposure apparatus . 6
10.2.1 Light sources . 6
10.3 Test specimens . 6
10.4 Procedure . 7
10.5 Evaluation. 8
10.6 Expression of results . 8
10.7 Report of test parameters . 8

© ISO 2013 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO/DIS 3917
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established 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. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 3917 was prepared by Technical Committee ISO/TC 22, Road Vehicles, Subcommittee SC 11, Safety
glazing materials.
This fourth edition cancels and replaces the fthird edition (ISO 3917:1999), which has been technically
revised.


iv © ISO 2013 – All rights reserved

---------------------- Page: 4 ----------------------
DRAFT INTERNATIONAL STANDARD ISO/DIS 3917

Road vehicles — Safety glazing materials — Test methods for
resistance to radiation, high temperature, humidity, fire and
simulated weathering
1 Scope
This International Standard specifies test methods for resistance to radiation, high temperature, humidity, fire
and simulated weathering, relating to the safety requirements for all safety glazing materials in a road vehicle,
whatever the type of glass or the material of which they are composed.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute
provisions of this International Standard. For dated references, subsequent amendments to, or revisions of,
any of these publications do not apply. However, parties to agreements based on this International Standard
are encouraged to investigate the possibility of applying the most recent editions of the normative documents
indicated below. For undated references, the latest edition of the normative document referred to applies.
Members of ISO and IEC maintain registers of currently valid International Standards.
ISO 3536, Road vehicles — Safety glazing materials — Vocabulary
ISO 3537, Road vehicles — Safety glazing materials — Mechanical tests
ISO 3538, Road vehicles — Safety glazing materials — Test methods for optical properties
ISO 3795, Road vehicles, and tractors and machinery for agriculture and forestry — Determination of burning
behaviour of interior materials
ISO 4892-1, Plastics — Methods of exposure to laboratory light sources — Part 1: General guidance
ISO 4892-2, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc sources
3 Terms and definitions
For the purposes of this International Standard, the terms and definitions given in ISO 3536 apply.
4 Test conditions
Unless otherwise specified, the test shall be carried out under the following conditions:
 ambient temperature: 20 °C ± 5 °C;
 atmospheric pressure: 86 kPa to 106 kPa (860 mbar to 1 060 mbar);
 relative humidity: (60 ± 20) %.
5 Application of test
For certain types of safety glazing material, it is not necessary to carry out all the tests specified in this
International Standard.
© ISO 2013 – All rights reserved 1

---------------------- Page: 5 ----------------------
ISO/DIS 3917
6 Radiation test
6.1 Principle
Determination of whether exposure to radiation over an extended period of time produces any appreciable
decrease in regular luminous transmittance or any pronounced discoloration of the safety glazing material.
6.2 Apparatus
6.2.1 Radiation source
Radiation source, consisting of a medium pressure mercury arc lamp with a tubular quartz bulb of ozone-free
type. The bulb axis shall be vertical and equipped with a suitable filter tube removing radiation below 300nm.
1)
The lamp operation parameters must be lamp power of 750 W ± 50 W.
Any other source of radiation which produces the same effect as the lamp specified above may be used. To
check that the effects of another source are the same, a comparison shall be made by measuring the amount
of energy emitted within a wavelength range of 300 nm to 450 nm, all other wavelengths being removed by
the use of suitable filters. The alternative source shall then be used with these filters.
In the case of safety glazing material for which there is no satisfactory correlation between this test and the
conditions of use, it will be necessary to review the test conditions.
6.2.2 Power supply
The power supply shall be capable of supplying adequate power to the lamp.
6.2.3 Device for mounting and rotating the test specimens
The device shall be capable of mounting and rotating the test specimens at 1 r/min to 5 r/min about the
centrally located radiation source in order to ensure even exposure.
6.3 Test specimen
The size of the test specimens shall be 76 mm × 300 mm.
6.3.1 Procedure
Measure the regular luminous transmittance, determined according to ISO 3538, of three test specimens
before exposure. Protect a portion of each test specimen from the radiation, and then position the test
specimen in the test apparatus 230 mm from, and with its 300 mm dimension parallel to, the lamp axis.
Maintain the temperature of the test specimens at 45 °C ± 5 °C throughout the test.
The surface of each test specimen which would represent the outside face of the safety glazing material when
mounted on the vehicle shall face the lamp. For the type of lamp specified in 6.2.1, the exposure time shall be
100 h.
After exposure, measure the luminous transmittance again on each test specimen in the exposed area.
6.4 Expression of results
The results of the luminous transmission measurement of the exposed test specimen shall be compared with
the values obtained for unexposed test specimens of the same material.
Changes in colour shall be evaluated:

1) A medium pressure mercury arc lamp which yields radiation spectra in the appropriate range at the specified
operating parameters is available under the trade name Heraeus Noblelight Q 701, modified by means of a UV-C filter
tube.
2 © ISO 2013 – All rights reserved

---------------------- Page: 6 ----------------------
ISO/DIS 3917
 either by examining the test specimens placed upon a white background and comparing the exposed
area
...