EN 14243-3:2019

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Materialien aus Altreifen - Teil 3: Reifenschnitzel, Abschnitte und Chips - Methode zur Bestimmung der Abmessungen und Verunreinigungen einschließlich vorstehender FasernMatériaux produits à partir de pneus usagés non réutilisables (PUNR) - Partie 3 : Broyats, coupes et chips - Méthodes de détermination de leur(s) dimension(s) y compris les dimensions des barbulesMaterials obtained from end of life tyres - Part 3: Shreds, cuts and chips - Methods for determining their dimension(s) including protruding filaments dimensions83.160.01Avtomobilske pnevmatike na splošnoTyres in general13.030.50RecikliranjeRecyclingICS:Ta slovenski standard je istoveten z:EN 14243-3:2019SIST EN 14243-3:2019en,fr,de01-april-2019SIST EN 14243-3:2019SLOVENSKI
STANDARDSIST-TS CEN/TS 14243:20101DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14243-3
February
t r s { English Version
Materials obtained from end of life tyres æ Part
uã Shredsá cuts and chips æ Methods for determining their ding filaments dimensionsMatériaux produits à partir de pneus usagés non
This European Standard was approved by CEN on
s { November
t r s zä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
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t r s { CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s v t v uæ uã t r s { ESIST EN 14243-3:2019

Contents Page European foreword . 3 Introduction . 4 1 Scope . 5 2 Normative references . 5 3 Terms, definitions, symbols and abbreviated terms . 5 4 Categories of products obtained from end-of-life tyres based mainly on their dimensions . 6 5 Determination of dimensions for shreds, cuts and chips . 6 Annex A (normative)
Evaluation of protruding filaments for shreds, cuts and chips . 13 A.1 General. 13 A.2 Principle of the evaluation . 13 A.3 Sampling . 13 A.4 Principle for determining dimension(s) by image analysis . 13 A.5 Equipment . 13 A.6 Procedure . 14 A.7 Metrological characteristics . 14 A.8 Measurement report . 14 Annex B (informative)
Example of scoop . 16 Annex C (informative)
Positioning of shreds when using image analysis . 17 C.1 General. 17 C.2 Position on the image . 17 C.3 Curvature . 17 Annex D (informative)
Removal of loose metal wires . 19 Bibliography . 20
European foreword This document (EN 14243-3:2019) 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 European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2019, and conflicting national standards shall be withdrawn at the latest by August 2019. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document together with EN 14243-1 and EN 14243-2 supersedes CEN/TS 14243:2010. EN 14243, Materials obtained from End-of-Life Tyres (ELTs), consists of the following parts: — Part 1: General definitions related to the methods for determining their dimension(s) and impurities — Part 2: Granulates and powders – Methods for determining the particle size distribution and impurities, including free steel and free textile content — Part 3: Shreds cuts and chips – Methods for determining their dimension(s) including protruding filaments dimensions According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 14243-3:2019

Introduction This standard is used in conjunction with the other parts of EN 14243 series. Such series is intended to cover the testing programs needed to characterize each product category as shown on the figure below.
Figure 1 — Typical scheme for a testing programme concerning several characteristics with testing steps in the field and in the laboratory End-of-life tyres consist mainly of passenger and commercial vehicle tyres, truck, earthmover and agricultural tyres manufactured for distribution in the European market that are no longer suitable for their original purpose. Products from end-of-life tyres are used as a secondary raw material finding a wide range of applications. The principal categories of materials from end-of-life tyres are defined on the basis of their dimension(s) according to EN 14243-1. SIST EN 14243-3:2019

1 Scope This document provides test methods for the determination of the dimension(s) of shreds, cuts and chips (including protruding filaments) produced from all categories of end-of-life tyres at all steps of the treatment processes. The methods described in this document include sample collection and the preparation of a representative sample based on a sampling plan for the purpose of determining dimensions. 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 14243-1:2019, Materials obtained from end of life tyres — Part 1: General definitions related to the methods for determining their dimension(s) and impurities EN 14243-2, Materials obtained from end of life tyres — Part 2: Granulates and powders — Methods for determining the particle size distribution and impurities, including free steel and free textile content ISO 565, Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal sizes of openings ISO 3310-1, Test sieves — Technical requirements and testing — Part 1: Test sieves of metal wire cloth ISO 5725-5, Accuracy (trueness and precision) of measurement methods and results — Part 5: Alternative methods for the determination of the precision of a standard measurement method 3 Terms, definitions, symbols and abbreviated terms 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in EN 14243-1:2019 apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses:
IEC Electropedia: available at http://www.electropedia.org/
ISO Online browsing platform: available at http://www.iso.org/obp 3.2 Symbols and abbreviated terms For the purposes of this document, the following symbols apply. ANPF Average Number per Piece of Filaments longer than MLF1 HDF Higher Dimension of the Format (millimetres) L Maximum projected Length (millimetres) LDF Lower Dimension of the Format (millimetres) MF Mass of the Fine pieces (grams) MLF Minimum length of a filament (in millimetres) SIST EN 14243-3:2019

MLF1 Minimum length of a filament (in millimetres) for the criterion average number of filaments per piece MLF2 Minimum length of a filament (in millimetres) for the criterion number percentage of pieces having at least one filament; MLM Mass of the Loose Metal wires (grams) MPC Mass Percentage of the NCC Central Classes (optional) MPF Mass Percentage of the Fine pieces MPL Mass Percentage of Large pieces (optional) MPM Mass Percentage of the loose Metal wires MS Mass of the laboratory Sample (grams) NCC Number of Central Classes NCR Number of Classes in the Range LDF — HDF NPC Number Percentage of the NCC Central Classes NPF Number Percentage of pieces having at least one Filament longer than MLF2 NPL Number Percentage of Large pieces TNP Total Number of Pieces in the sample not including the fine pieces 4 Categories of products obtained from end-of-life tyres based mainly on their dimensions For categories and testing program refer to EN 14243-1:2019, Clause 4. 5 Determination of dimensions for shreds, cuts and chips 5.1 General Shreds, cuts and chips are materials produced from end-of-life tyres by primary shredding. Primary shredding corresponds to the processing of end-of-life tyres by shredding, crushing or fragmenting, while maintaining in the obtained output material an average global composition similar to that of the end-of-life tyres. Depending on the agreed test programme between the producer and the customer, or at the producer's own will, the determination of dimensions specified in this clause for shreds, cuts and chips if required shall be followed by the additional determination of filaments as specified in Annex A. Producer and customer may also agree to determine the dimensions of chips considered as large granulates, using the methods described in EN 14243-2. 5.2 Sampling plan 5.2.1 Principles of sampling The main principle of sampling is to obtain a representative sample(s) from a whole lot (of defined material) from which a characteristic is to be determined. If the lot is to be represented by a sample, then every particle in the lot shall have an equal probability of being included in the sample (i.e. probabilistic SIST EN 14243-3:2019

sampling). When these principles cannot be applied in practice, the sampler shall define a procedure as close as possible to probabilistic sampling in his judgement (i.e. judgemental sampling) and note the limitations in the sampling plan and sampling report. To take samples in a way that is truly representative of the material produced is easier when the material is moving (to be avoided for example in a stockpile, big bag or silo). Regarding shreds, it is necessary to take samples when the material is in movement. NOTE The determination of other properties than dimensions may result in different sampling requirements. This is the case for the determination of physical properties (such as apparent density) or chemical composition. 5.2.2 Preparation of the sampling plan for determining dimensions The first step is to identify the properties required in the testing programme and the lot in relation to which they are defined, for instance "maximum projected length on a shreds production of 300 t". The lot size is based on production quality management decisions or specific customer requirements. The lot size may be defined by the producer as a fixed quantity produced between machine settings or a fixed quantity in a production day/shift/week or a fixed quantity. With regards to certain pieces exhibiting large dimensions, the tools for taking an increment shall be sufficiently large in order that the large pieces are equally sampled. For shreds, this typically results in increments of more than 200 pieces (about 3 kg to 15 kg). NOTE 1 Larger increments would slightly improve the sampling quality, while increasing the size of the field sample, therefore complicating the size reduction into laboratory sample(s). It is preferable to increase the number of increments, thus increasing dir
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