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

This standard provides test methods for the determination of the particle size distribution of granulates and powders, produced from all categories of end-of-life tyres at all steps of the treatment processes as well as for the determination of impurities (including free steel and free textile content).
The methods described in this standard include sample collection and the preparation of a representative sample based on a sampling plan for the purpose of determining particle size distribution and impurities.

Materialien aus Altreifen - Teil 2: Granulate und Gummimehle - Verfahren zur Bestimmung der Korngrößenverteilung und Verunreinigungen, einschließlich Gehalt an freiem Stahl und freiem Textil

Diese Norm enthält Prüfverfahren zur Bestimmung der Korngrößenverteilung von Granulaten und Gummimehlen, die aus allen Kategorien von Altreifen in allen Stufen der Behandlungsprozesse hergestellt werden, und zur Bestimmung von Verunreinigungen (einschließlich Anteil an freiem Stahl und freiem Textil).
Die in dieser Norm beschriebenen Verfahren enthalten die Probesammlung und die Vorbereitung einer repräsentativen Probe auf Basis eines Probenahmeplans, um die Korngrößenverteilung und Verunreinigungen zu bestimmen.

Matériaux produits à partir de pneus usagés non réutilisables (PUNR) - Partie 2: Granulats et poudrettes - Méthodes de détermination de la distribution granulométrique et des impuretés, y compris la teneur en fils métalliques et en fibres textiles libres

La présente norme fournit des méthodes d’essai pour la détermination de la distribution granulométrique des granulats et poudrettes produits à partir de toutes les catégories de pneus usagés non réutilisables, à toutes les étapes des procédés de traitement ainsi que pour la détermination des impuretés (y compris le taux d’acier libre et le taux de textile libre).
Les méthodes décrites dans la présente norme comprennent la collecte d’échantillons et la préparation d’un échantillon représentatif sur la base d’un plan d’échantillonnage visant à déterminer la distribution granulométrique et les impuretés.

Snovi iz izrabljenih avtomobilskih gum - 2. del: Granulati in praški - Metode za ugotavljanje njihovih mer in nečistoč, vključno z jeklenimi in tekstilnimi delci

Ta evropski standard določa preskusne metode za določanje mer granulatov in praškov, proizvedenih iz vseh kategorij izrabljenih avtomobilskih gum v vseh korakih procesov obdelave ter tudi za določanje nečistoč (vključno z jeklenimi in tekstilnimi delci).
Metode, opisane v tem standardu, zajemajo jemanje vzorcev in pripravo reprezentativnega vzorca na podlagi načrta vzorčenja za namene določanja mer ter nečistoč.
Ta standard ne zajema operativnega delovanja ali primernosti za uporabo materialov, za katere se šteje, da so predmet dogovora med proizvajalcem in stranko.
Ta standard ne obravnava vseh morebitnih varnostnih težav, ki se nanašajo na njegovo uporabo. Ta standard ne vzpostavlja ustreznih varnostnih in zdravstvenih praks ter ne določa uporabnosti regulativnih omejitev pred uporabo.

General Information

Status
Published
Publication Date
12-Feb-2019
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
13-Feb-2019
Completion Date
13-Feb-2019

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Materialien aus Altreifen - Teil 2: Granulate und Pulver - Methode zur Bestimmung der Abmessungen und Verunreinigungen einschließlich freier Stahl, freie Textilien und andere VerunreinigungenMatériaux produits à partir de pneus usagés non réutilisables (PUNR) - Partie 2 : Granulats et poudrettes - Méthodes de détermination de leur(s) dimension(s) et impuretés, y compris la teneur en fils métalliques et en fibres textiles libresMaterials obtained from end of life tyres - Part 2: Granulates and powders - Methods for determining their dimension(s) and impurities, including free steel and free textile content83.160.01Avtomobilske pnevmatike na splošnoTyres in general13.030.50RecikliranjeRecyclingICS:Ta slovenski standard je istoveten z:EN 14243-2:2019SIST EN 14243-2:2019en,fr,de01-april-2019SIST EN 14243-2:2019SLOVENSKI

STANDARDSIST-TS CEN/TS 14243:20101DGRPHãþD
SIST EN 14243-2:2019
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14243-2
February
t r s { English Version
Materials obtained from end of life tyres æ Part

tã Granulates and powders æ Methods for determining the particle size distribution and impuritiesá including free steel and free textile content Matériaux produits à partir de pneus usagés non æ Méthodes de détermination de la distribution granulométrique et des impuretésá y compris la teneur en fils métalliques et en fibres textiles libres

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

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels

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 tã t r s { ESIST EN 14243-2:2019
EN 14243-2:2019 (E) 2

Contents Page European foreword ............................................................................................................................................ 4 Introduction .......................................................................................................................................................... 5 1 Scope .......................................................................................................................................................... 6 2 Normative references .......................................................................................................................... 6 3 Terms and definitions ......................................................................................................................... 6 4 Categories of products obtained from end-of-life tyres based mainly on their dimensions and particle size distribution ................................................................................... 6 5 Determination of particle size distribution for granulates and powders ........................ 7 Annex A (normative)

Determination of free steel content for granulates and powders by the method of magnetic separation ..................................................................................................... 17 A.1 General.................................................................................................................................................... 17 A.2 Principle of determination .............................................................................................................. 17 A.3 Sampling ................................................................................................................................................. 17 A.4 Equipment ............................................................................................................................................. 17 A.5 Procedure .............................................................................................................................................. 18 A.6 Calculation ............................................................................................................................................. 19 A.7 Metrological characteristics ........................................................................................................... 19 A.8 Test report ............................................................................................................................................. 19 Annex B (normative)

Determination of free textile content for granulates and powders by the method of the "small ball" agglomeration .......................................................................... 20 B.1 General.................................................................................................................................................... 20 B.2 Principle of the determination ...................................................................................................... 20 B.3 Sampling ................................................................................................................................................. 20 B.4 Equipment ............................................................................................................................................. 20 B.5 Procedure .............................................................................................................................................. 20 B.6 Calculations ........................................................................................................................................... 21 B.7 Metrological characteristics ........................................................................................................... 21 B.8 Test report ............................................................................................................................................. 21 Annex C (normative)

Determination of other impurities for granulates and powders by the method of a saline solution ............................................................................................................. 22 C.1 General.................................................................................................................................................... 22 C.2 Principle of the determination ...................................................................................................... 22 C.3 Sampling ................................................................................................................................................. 22 SIST EN 14243-2:2019

EN 14243-2:2019 (E) 3

C.4 Equipment and Reagents ................................................................................................................. 22 C.5 Procedure .............................................................................................................................................. 23 C.6 Calculations .......................................................................................................................................... 24 C.7 Metrological characteristics ........................................................................................................... 25 C.8 Test report ............................................................................................................................................ 25 Annex D (informative)

Example of separatory funnel ....................................................................... 26 Annex E (informative)

Sieving .................................................................................................................... 27 Annex F (informative)

Recommended sieve list................................................................................... 28 Bibliography ....................................................................................................................................................... 29

SIST EN 14243-2:2019
EN 14243-2:2019 (E) 4

European foreword This document (EN 14243-2:2019) 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 14243-3 supersede 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 14243-2:2019

EN 14243-2:2019 (E) 5

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 14243-2:2019

EN 14243-2:2019 (E) 6

1 Scope This standard provides test methods for the determination of the particle size distribution of granulates and powders, produced from all categories of end-of-life tyres at all steps of the treatment processes as well as for the determination of impurities (including free steel and free textile content). The methods described in this standard include sample collection and the preparation of a representative sample based on a sampling plan for the purpose of determining particle size distribution 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 14243-1:2019, Materials obtained from end of life tyres — Part 1: General definitions related to the methods for determining their dimension(s) and impurities EN 933-1, Tests for geometrical properties of aggregates — Part 1: Determination of particle size distribution — Sieving method EN 933-2, Tests for geometrical properties of aggregates — Part 2: Determination of particle size distribution — Test sieves, nominal size of apertures CEN/TS 17188, Materials obtained from end of life tyres — Sampling method for granulates and powders stored in big-bags ISO 565, Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal sizes of openings ISO 3310-1:2016, Test sieves — Technical requirements and testing — Part 1: Test sieves of metal wire cloth ISO 3310-2:2013, Test sieves — Technical requirements and testing — Part 2: Test sieves of perforated metal plate 3 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 4 Categories of products obtained from end-of-life tyres based mainly on their dimensions and particle size distribution For categories and testing program, refer to EN 14243-1:2019, Clause 4. SIST EN 14243-2:2019

EN 14243-2:2019 (E) 7

5 Determination of particle size distribution for granulates and powders 5.1 General Particle size and related parameters are key measurements for product classification of size-reduced materials such as granulates and powders. Particle size analysis is the first measurement of consistency and forms the basis for material grading. Before being able to obtain an accurate particle size distribution, a representative sample of the material to be tested shall be taken. Depending on the agreed testing program between the producer and the customer, or on the producer's own will, the determination of particle size distribution specified in this clause for granulates and powders may be followed by the additional determination(s) of the free steel content and/or the free textile content and/or the other impurities as specified in Annexes A, B and C. 5.2

Sampling plan 5.2.1 Principles of sampling The main principle of sampling is to obtain a representative sample(s) from a lot of 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 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. Obtaining samples that are truly representative of the material produced is easier when the material is moving (for example on a conveyor belt). Therefore, sampling from moving material is to be preferred wherever possible. For granulates and powders stored in big-bags a sampling method is described in CEN/TS 17188. NOTE The determination of properties other than particle size distribution may result in different sampling requirements. This is the case for the determination of physical properties (such as bulk density) or chemical composition. 5.2.2 Preparation of the sampling plan A sampling plan shall be prepared before samples are taken through a specific definition of the lot size and the size and number of increments to be taken. 5.2.3 Definition of lot size The lot size shall be defined by the producer in accordance with requested specifications and is a fixed quantity for which a characteristic is to be determined. The lot size mlot may be defined by the producer as:

a fixed quantity produced between changes in the process settings that could affect the product specifications

a fixed quantity in a production day/shift

a fixed quantity minimum of 100 t (10 t for powders). The lot size is based on production quality management decisions or specific customer requirements. SIST EN 14243-2:2019

EN 14243-2:2019 (E) 8

5.2.4 Sampling point and apparatus Based on health and safety assessments and producer equipment, a fixed sampling point for the collection of sample increments shall be chosen for each material fraction to be monitored. Sampling shall be carried out using a sample box or other suitable equipment. The sampling box is passed through the stream of falling material so that it uniformly cuts the full flow of falling material. The box shall be large enough so that it does not become overloaded. Automatic systems fulfilling these criteria may also be used. 5.2.5 Size of a sample increment The sampling box shall have a capacity of not less than: Vmin = 0,5 dm3 for d < 10 Vmin = 0,05 × d

for
s r
¶ d

t r where Vmin is the minimum capacity of the sampling box (in cubic decimetres); d is the nominal top size in millimetres;

The sampling operator shall record the approximate capacity of the sampling device Vincrement (in cubic decimetres). 5.2.6 Number of increments The minimum number of increments to be taken from a lot depends on the nominal top size of the material to be sampled. The material shall be assigned by the sampler to one of two groups in Table 1. Table 1 — Classification of material according to size Group 1 Group 2 nominal top size < 10 mm nominal top size between 10 mm and 20 mm For sampling from moving material: Group 1: n = 3 + 0,025 × mlot (size of granulates from 0,8 mm to 10 mm and powders under 0,8 mm) Group 2: n = 5 + 0,040 × mlot (size of granulates from 10 mm to 20 mm) where n is the minimum permitted number of increments rounded off to the higher nearest whole number mlot is the mass of the lot in tonnes.

Sample collection is carried out according to the sample plan and the increments are collected manually using the sampling box. Increments shall be taken at regular intervals during the production of the lot in accordance with the sampling plan. The time of increment collection is recorded in the sampling plan. Each increment taken from the lot is placed in the sampling container and at the end of the process, it constitutes the combined sample which is sent to a laboratory as laboratory sample. In case more than one laboratory sample is required, they shall be prepared in the plant in accordance with the principles of sample division of 5.4.2. SIST EN 14243-2:2019

EN 14243-2:2019 (E) 9

5.2.7 Visual assessment The increments shall be assessed visually and observations on the quality should be noted as additional information and recorded according to quality management, best practice policies or specific customer requirements. 5.2.8 Sampling certificate The sampling certificate shall include at least the following information: a) the name of the producer; b) kind of material: powder or granulate; c) a unique identification number of the sample; d) the name of the sampler; e) the location(s), date and time of sampling; f) Collection point of the material: 1) production with the additional information: — nominal top size — definition and mass of the lot size — a unique identification number of the lot — sampling point — number, time and volume of increments — V increment 2) big bag (sampling according to CEN/TS 17188); g) weight of the combined sample sent to laboratory; h) reference to this standard; i) any deviation from this standard. 5.3 Storage and transport of laboratory sample(s) Samples are to be stored in such a way that material will not be lost during transportation. The samples are to be stored dry and in a sealed sample box. The sampling certificate shall be attached. SIST EN 14243-2:2019

EN 14243-2:2019 (E) 10

5.4 Preparation of the laboratory sample(s) and test portion(s) 5.4.1 Principles of correct sample preparation and sample division The main purpose of sample preparation is that the laboratory sample collected from the whole lot are reduced to one or more test samples based on sample division. The aim of sample division is therefore to homogenize and reduce the mass of the laboratory sample to make several duplicate test samples. Each test sample shall be representative of the original sample based on the principle that the composition of the sample as taken on site shall not be changed during the steps of sample preparation for testing. 5.4.2 Test sample and test portion preparation The increments that have been collected are mixed together in a container of suitable size to form a combined sample. In this case the combined sample is the laboratory sample. The laboratory sample may need to be reduced to a test sample before a test portion is produced. The test sample(s) or directly the laboratory sample shall be reduced to a suitable size in order to obtain test portion(s) in such a way that sufficient material is still provided for all the tests to be performed. In particular, the calculation shall take into account the need for duplicate test portions, for extra material in case dubious results are obtained and the need for sampling with replacement. The sampling plan shall take into account such requirements. The test sample(s) (or directly the laboratory sample) shall be reduced using the principles of sample division using either: — a riffle splitter; — a rotary sample divider, or — other equivalent device. 5.4.3 Apparatus for sample division The most relevant sample division methods are based on the following apparatus: a) Riffle splitter: a sample splitter shall have at least 12 slots and an even number with adjacent slots directing material into two different sub-samples. The width of the slots shall be at least three times the nominal top size of the material to be riffled to prevent sample bridging. SIST EN 14243-2:2019

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Figure 2 — Example of a riffle box b) Rotary sample divider: a rotary sample divider shall be used according to its manufacturer's manual. The inner dimensions of the equipment where the sample is fed shall be at least three times as wide as the nominal top size to be processed. 5.4.4 Procedure The combined sample is mixed with a scoop and sent through the sample divider until the sample reduction is complete. A final mass quantity is prepared for the purposes of particle size analysis depending on the size of the sieving system in order to fulfil the non-overloading criteria given in 5.5.6. 5.5 Particle size analysis 5.5.1 General principles A sample is subjected to mechanical sieving through a set of oscillating sieves, sorting the particles in decreasing size classes by mechanical means. All apparatus shall conform to the general requirements of EN 933-1, EN 933-2, ISO 565, ISO 3310-1 and ISO 3310-2. The sample shall be completely dry before particle size analysis. 5.5.2 Sieves For the sieve analysis, an appropriate number of sieves is required and shall be chosen according to the size specification of the sample to be tested. The geometry of the apertures shall be either circular or square, the thickness of the sieves, the distances of the holes and the diameter of the holes shall be in accordance with ISO 3310-1 and/or ISO 3310-2. The frame of the sieves shall have a height that enables the sieves to contain the samples and allow for the free movement of the sample during the sieving process. The number of sieves that are used may vary according to the particle size distribution that is to be determined. When choosing sieves for performing the analysis the supplementary row R 20 from ISO 3310-1:2016 and/or ISO 3310-2:2013 shall be preferred. It is not permitted to jump between principal and supplementary rows within a series. Annex F reports a list of square apertures commonly used for dimensional determination of granulates and powders. SIST EN 14243-2:2019

EN 14243-2:2019 (E) 12

5.5.3 Flat brush A flat brush is required for cleaning the sieves. 5.5.4 Mechanical vibrating equipment A mechanical device that applies a 3-dimentional vibrating movement is to be used. The equipment shall have a timer and amplitude settings. The amplitude shall be set at 1,5 mm. 5.5.5 Scales Scales capable of measuring the mass of the sample to be sieved to the nearest 0,1 g. 5.5.6 Procedure Assemble and operate the mechanical shaking device with the appropriate sieve sizes with decreasing aperture size ending with the collecting pan. The quantity of sample to be used depends primarily on the maximum particle size, the number of sieves in the sieve stack and their openings. The sieves shall not be overloaded. Criteria for not overloading are given in Annex E. The initial sieve should be loaded with a quantity of material as close as possible to 0,3 g/cm2 for powders and 0,5 g/cm2 for granulates. Therefore, for the purpose of this standard, 200 mm sieves are recommended with a sample mass as close as possible to 100 g for powders and 150 g for granulates. If 315 mm sieves are used, the sample mass is as close as possible to 250 g for powders and 350 g for granulates. NOTE 1 For powders having a nominal dimension smaller than 250 µm it is advised to split the test portion in sub-portions to be sieved separately. Fractions retained on each sieve are gathered and weighted. Then they are expressed as percentage of the total test portion. In case of moist samples, drying shall be performed by placing the sample inside an oven of circulating air at a temperature of (60 ± 2) °C until constant weight is reached. Wait until room temperature is reached. The particle size analysis shall not be performed before 30 min after the extraction of the sample from the oven. Before sieving starts, the mass of all individual sieves shall be measured on the scales used for determination of sieving fractions. The mass of each sieve i shall be recorded as msi. Weigh the sample to the nearest 0,1 g. For the following calculations the mass of the sample will be defined m0. Spread the test sample in an even layer on the top sieve. Using a brush, remove all traces from the sample box. Secure the cover plate (lid) and begin the sieving operation. The duration of the sieving operation for granulates and powders is fixed at: — 12 min ± 15 s; Weigh each sieve together with the retained net material and the material in the collecting pan with an accuracy of 0,1 g and record the masses as expressed in 5.5.7. NOTE 2 It is advised to avoid the loss of particles from the screens. If a particle sticks in a sieving hole, it is suggested to remove it and add it to the fraction which remained on the sieve (as it did not pass the hole). SIST EN 14243-2:2019

EN 14243-2:2019 (E) 13

5.5.7 Calculation Weigh each sieve and record the various masses on a test data sheet alongside the corresponding sieve size. The mass of the empty sieve i plus the material retained on it is mssi. The mass mi of the material retained on each sieve i shall be calculated according to the following formula: mi=mssi-msi After calculating all the masses from each sieve, calculate the total mass collected (mt): mt ± Ãmi Calculate the difference between m0 and mt in terms of percentage according to following formula: Total deviation (%) = 100-|(mt/m0) x 100| If there is more than a 1 % difference between the total mass of the test sample m0 and the sum of the masses mi of all the fractions mt then the test shall be repeated. Calculate the cumulative percentage of mi passing each sieve, to the nearest decimal point, by adding in each step the mass in percentage of the corresponding sieve. The percentage on each sieve is calculated according to formula: mi(%)=(mi/m0) x 100 5.5.8 Graphical representation After calculation a graphical representation of the results shall be made. Both the percentage of the mass retained on each sieve and the percentage of the mass passing through it shall be plotted as a function of the aperture size of the sieve, expressed in millimetres (mm) for sizes of 1 mm and above and in microns

From the plot of the mass passing through each sieve, it is possible to determine by linear interpolation at which aperture size the passing percentage is 90 % and take this as the upper limit of the dimension of the granulate or powder under analysis. Likewise, for granulates it is possible to determine the aperture size at which the passing percentage is 10 % and take this as the lower limit. The two limits are a typical measure of the particle size distribution of the material. A granulate is characterised by its nominal dimensions (agreed between producer and customer). In a compliance testing of the particle size distribution of a sample, the nominal upper dimension shall be not smaller than the upper limit, and the nominal lower dimension shall not be higher than the lower limit. For a powder only the upper values shall be considered. Hereafter an example of graphical representation is given. It relates to the results of a particle size analysis made on a granulate sample, obtained from a production lot having nominal dimensions 1,4 – 4,0 mm. For the test eight sieves have been used. For each sieve aperture, the material retained on it and that passing through it are reported in percentage in the following table: SIST EN 14243-2:2019

EN 14243-2:2019 (E) 14

Table 2 — Material retained on the sieve and passing through the sieve I II R C bottom 1 0,5 % 0,5 %

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