oSIST prEN 17978:2023

SLOVENSKI STANDARD
oSIST prEN 17978:2023
01-julij-2023
Proizvodi za pripravo pitne in bazenske vode - Steklene kroglice in steklen
granulat
Products used for treatment of water intended for human consumption and swimming
pool water - Glass beads and glass granulate
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Glasperlen und
Glasgranulat
Produits utilisés pour le traitement de l’eau destinée à la consommation humaine et de
l’eau de piscine - Billes de verre et granulés de verre
Ta slovenski standard je istoveten z: prEN 17978
ICS:
13.060.20 Pitna voda Drinking water
13.060.25 Voda za industrijsko uporabo Water for industrial use
71.100.80 Kemikalije za čiščenje vode Chemicals for purification of
water
oSIST prEN 17978:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 17978:2023

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oSIST prEN 17978:2023


DRAFT
EUROPEAN STANDARD
prEN 17978
NORME EUROPÉENNE

EUROPÄISCHE NORM

May 2023
ICS 71.100.80
English Version

Products used for treatment of water intended for human
consumption and swimming pool water - Glass beads and
glass granulate
 Produkte zur Aufbereitung von Wasser für den
menschlichen Gebrauch - Glasperlen und Glasgranulat
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 164.

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-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye 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

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17978:2023 E
worldwide for CEN national Members.

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oSIST prEN 17978:2023
prEN 17978:2023 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Description . 7
4.1 Identification . 7
4.1.1 Chemical name . 7
4.1.2 Synonyms or common names . 7
4.1.3 Chemical composition . 7
4.1.4 CAS registration number . 7
4.1.5 EINECS number . 7
4.2 Commercial forms . 7
5 Physical properties . 7
5.1 General. 7
5.2 Appearance . 7
5.2.1 Glass beads . 7
5.2.2 Glass granulate . 7
5.3 Mechanical stability . 8
5.4 Particle size distribution . 8
5.4.1 General. 8
5.4.2 Glass beads . 8
5.4.3 Glass granulate . 8
5.5 Grain size groups . 8
5.6 Density . 9
5.6.1 Bulk density (loose) . 9
5.6.2 Bulk density (packed) . 9
5.6.3 Absolute density . 9
6 Chemical properties . 10
7 Test methods . 11
7.1 Sampling . 11
7.2 Analyses. 11
7.2.1 Particle size distribution . 11
7.2.2 Bulk density (loose and packed) . 11
7.2.3 Water-extractable chemical components . 11
7.2.4 Analyses of the contaminants . 11
8 Labelling - transportation and storage . 14
8.1 Means of delivery . 14
2)
8.2 Risk and safety labelling according to the EU Regulations and Directives . 14
8.3 Transportation regulations and labelling . 14
8.4 Marking . 14
8.5 Storage . 14
8.5.1 Long term chemical stability . 14
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prEN 17978:2023 (E)
Annex A (informative) General information on glass beads and glass granulate . 15
A.1 Origin . 15
A.1.1 Raw material . 15
A.1.2 Manufacturing process . 15
A.2 Typical properties . 15
A.2.1 Typical heavy metal content . 15
A.2.2 Mechanical Stability . 16
A.3 Application . 16
A.3.1 Function . 16
A.3.2 Specific amount . 16
A.3.3 Means of application. 16
A.3.4 Secondary effects . 16
A.4 Hydraulic characteristics . 17
A.4.1 Interstitial volume . 17
A.4.2 Head loss in filtration . 17
A.4.3 Expansion during backwashing. 17
Annex B (normative) General rules relating to safety . 18
B.1 Rules for safe handling and use . 18
B.2 Emergency procedures . 18
B.2.1 First aid . 18
B.2.2 Spillage . 18
B.2.3 Fire protection . 18
Bibliography . 19

3

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oSIST prEN 17978:2023
prEN 17978:2023 (E)
European foreword
This document (prEN 17978:2023) has been prepared by Technical Committee CEN/TC 164 “Water
Supply”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
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oSIST prEN 17978:2023
prEN 17978:2023 (E)
Introduction
In respect of potential adverse effects on the quality of swimming pool water and water intended for
human consumption, caused by the products covered by this document:
a) this document provides no information as to whether the products may be used without restrictions
in any of the Member States of the EU or EFTA;
b) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national
regulations concerning the use and/or the characteristics of these products remain in force.
NOTE Conformity with this document does not confer or imply acceptance or approval of the products in any
of the Member States of the EU or EFTA. The use of the products covered by this document is subject to regulation
or control by National Authorities.
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oSIST prEN 17978:2023
prEN 17978:2023 (E)
1 Scope
This document is applicable to glass beads and glass granulate intended for treatment of water for human
consumption, swimming pool and/or spa water. It solely describes the characteristics of glass beads and
glass granulate and specifies the requirements and the corresponding test methods for glass beads and
glass granulate.
General information on glass beads and glass granulate is provided in Annex A. General rules relating to
safety are provided in Annex B.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 12901, Products used for treatment of water intended for human consumption - Inorganic supporting
and filtering materials - Definitions
EN 12902, Products used for treatment of water intended for human consumption - Inorganic supporting
and filtering materials - Methods of test
EN ISO 12677, Chemical analysis of refractory products by X-ray fluorescence (XRF) - Fused cast-bead
method (ISO 12677)
ISO 695, Glass — Resistance to attack by a boiling aqueous solution of mixed alkali — Method of test and
classification
ISO 13322-2, Particle size analysis — Image analysis methods — Part 2: Dynamic image analysis methods
ISO 22309, Microbeam analysis — Quantitative analysis using energy-dispersive spectrometry (EDS) for
elements with an atomic number of 11 (Na) or above
ISO 8039, Microscopes — Values, tolerances and symbols for magnification
EN ISO 19743, Solid biofuels - Determination of content of heavy extraneous materials larger than 3,15 mm
(ISO 19743)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 12901 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
glass granulate
granulated filter material made of glass free from any other extraneous matter
3.2
glass beads
round (spherical) filter material made of glass free from any other extraneous matter
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oSIST prEN 17978:2023
prEN 17978:2023 (E)
4 Description
4.1 Identification
4.1.1 Chemical name
Glass beads and glass granulate predominantly consist of amorphous silicon dioxide (Si0 ).
2
More detailed information on the composition of filter materials made from glass is found in Table 3 and
in Table A.1.
4.1.2 Synonyms or common names
Glass beads are also called glass pearls, glass balls, filter beads or filter glass.
Glass granulate is also called crushed glass, glass sand, glass cullet or filter glass.
4.1.3 Chemical composition
See Table 3.
4.1.4 CAS registration number
CAS 65997-17-3
4.1.5 EINECS number
EINECS 266-046-0
4.2 Commercial forms
Glass beads and glass granulate conforming to this document are available in various sieve fractions.
5 Physical properties
5.1 General
Glass beads and glass granulate differ markedly in their geometrical shapes as well as their composition,
the physical and chemical properties. The structure of their surface has an influence on the
microbiological potential to grow.
5.2 Appearance
5.2.1 Glass beads
Glass beads are round and mostly of a white to greenish colour, an amorphous structure and a smooth
surface. The round shape has a major influence on the filtering properties. Glass beads shall be generally
homogeneous and visibly free of extraneous matter at the moment of delivery, to avoid clogging of the
filter.
5.2.2 Glass granulate
Glass granulate is usually a green-brown granular material. The structure is amorphous with a smooth to
slightly rough surface. The shape is similar to that of a grain of crushed sand. However, no sharp edges
are allowed in order to prevent injury during maintenance or servicing. Glass granu
...