FprEN 17188

SLOVENSKI STANDARD
01-januar-2024
Snovi iz izrabljenih avtomobilskih gum (ELT) - Metoda vzorčenja granulatov in
praškov, shranjenih v velikih in malih vrečah
Materials obtained from End-of-Life Tyres (ELT) - Sampling method for granulates and
powders stored in big-bags and small-bags
Materialien aus Altreifen (ELTs) - Probeentnahme für in Big Bags und Small Bags
gelagerte Granulate und Mehle
Matériaux obtenus à partir de pneus usagés non réutilisables (PUNR) - Méthode
d'échantillonnage de granulats et de poudrettes stockés dans des big-bags et des sacs
Ta slovenski standard je istoveten z: prEN 17188
ICS:
13.030.50 Recikliranje Recycling
83.160.01 Avtomobilske pnevmatike na Tyres in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
prEN 17188
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2023
ICS 13.030.50; 83.160.01 Will supersede CEN/TS 17188:2018
English Version
Materials obtained from end of life tyres (ELT) - Sampling
method for granulates and powders stored in big-bags and
small-bags
Materialien aus Altreifen (ELTs) - Probeentnahme für
in Big Bags und Small Bags gelagerte Granulate und
Mehle
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 366.
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 17188:2023 E
worldwide for CEN national Members.

prEN 17188:2023(E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Sampling from big-bags . 6
4.1 Principle . 6
4.2 Apparatus . 7
4.3 Procedure . 7
5 Sampling from small-bags . 9
5.1 Principle . 9
5.2 Apparatus . 9
5.3 Procedure for sampling . 10
6 Sampling scheme. 11
Annex A (normative) Characteristics of the Sampling tool for big-bags . 13
Annex B (informative) Sample test sheet . 14
Bibliography . 15

prEN 17188:2023(E)
European foreword
This document (prEN 17188:2023) has been prepared by Technical Committee CEN/TC 366 “Materials
obtained from End-of-Life Tyres (ELT)”, the secretariat of which is held by UNI.
This document is currently submitted to the CEN Enquiry.
This document will supersede CEN/TS 17188:2018.
prEN 17188:2023 includes the following significant technical changes with respect
to CEN/TS 17188:2018:
— addition of a sampling method for small-bags in the Title and Scope;
— revision of the used terminology to integrate small-bags;
— review of the general structure of the document.
prEN 17188:2023(E)
Introduction
Particle size distribution and related parameters are key measurements for product characterization of
size-reduced materials, such as granulates and powders derived from End-of-Life Tyres (ELTs). To obtain
an accurate particle size distribution, a representative sample of the material to be tested will be taken
according to the principle that every particle of the sample that represents the lot will have an equal
probability of being included in the sample.
Sampling criteria to assess characteristics of granulates and powders at different stages of a production
process by size reduction of end-of-life tyres are given in EN 14243-2:2019, Clause 5.
When the lot to be characterized is a big-bag or a small-bag, particular attention is needed in order to
obtain a representative sample(s) because of the tendency of the stored material to segregate over time
with the smaller particles settling in the lower part of the bag.
prEN 17188:2023(E)
1 Scope
This document specifies methods for obtaining a sample of rubber granulates or powders derived from
end-of-life tyres which have been stored in big-bags and small-bags.
Several sample increments at different levels within the bag are obtained, which represent the average
particle size distribution within the bag. From these sample increments, a representative sample is
derived.
The methods described in this standard may be used, for example, when the samples are to be tested for
bulk density, durability, particle size distribution, moisture content, ash content, ash melting behaviour,
calorific value, chemical composition, and impurities.
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 14243-1, Materials obtained from end of life tyres - Part 1: General definitions related to the methods
for determining their dimension(s) and impurities
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 14243-1 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1
granulation processes
successive shredding, crushing, fragmentation, sorting and sieving of ELT in order to separate the textile
or metal reinforcements from the rubber matrix
3.2
powders
result of processing ELT by reducing them in the form of particles less than 0,8 mm and excluding loose
metal wires and loose textile fibers
3.3
granulates
result of processing rubber to reduce it in size into finely dispersed particles between typically 0,8 mm
and 20 mm
3.4
end-of-life tyres
tyre no longer suitable for its original purpose
3.5
laboratory sample
sample or sub-sample sent to or received by the laboratory
[IUPAC definition]
prEN 17188:2023(E)
Note 1 to entry: When the laboratory sam
...