SIST-TS CEN/TS 17308:2019
(Main)Materials produced from end of life tyres - Steel wire - Determination of the non-metallic content
Materials produced from end of life tyres - Steel wire - Determination of the non-metallic content
This document provides two different methods for the quantitative estimation of non-metallic content remaining adhered to the steel wire obtained from the recovery of materials from end-of-life tyres.
The pyrolysis method is considered as the reference method while the hydrostatic method is considered as an in-situ method.
This European Standard includes sample collection and the preparation of representative samples based on a sampling plan for the purpose of their characterization.
This European Standard does not cover the operational performance or fitness for use of the materials which are deemed to be a function of agreements between the manufacturer and the customer.
This European Standard does not purport to address all the safety concerns, if any, associated with its use. This European Standard does not establish appropriate safety and health practices and does not determine the applicability of regulatory limitations prior to its use.
Aus Altreifen gewonnene Materialien - Stahldrähte - Bestimmung der nicht-metallischen Bestandteile
Dieses Dokument legt zwei verschiedene Verfahren zur quantitativen Bestimmung der am Stahldraht verbleibenden nicht-metallischen Bestandteile aus der Rückgewinnung von Materialien aus Altreifen fest.
Das Pyrolyseverfahren wird als Referenzverfahren betrachtet, während das hydrostatische Verfahren als In-situ-Verfahren betrachtet wird.
Diese Europäische Norm beinhaltet die Probenentnahme und die Vorbereitung von repräsentativen Proben auf Grundlage eines Probenentnahmeplans zum Zweck ihrer Charakterisierung.
Diese Europäische Norm behandelt nicht die Leistungsfähigkeit oder Nutzungseignung der Materialien, die von Vereinbarungen zwischen Hersteller und Kunden abhängig sind.
Diese Europäische Norm gibt nicht vor, alle unter Umständen mit ihrer Anwendung verbundenen Sicherheitsaspekte zu behandeln. Diese Europäische Norm legt keine entsprechenden Maßnahmen für die Sicherheit und den Gesundheitsschutz fest und regelt nicht die Anwendbarkeit verordnungsrechtlicher Beschränkungen vor ihrer Umsetzung.
Pneus usagés non réutilisables (PUNR) - Fils métalliques - Détermination de la teneur en matériaux non métalliques
Le présent document propose deux méthodes différentes d’estimation quantitative de la teneur en matériaux non métalliques adhérant aux fils métalliques obtenus à partir de la récupération des matériaux sur des pneus usagés non réutilisables.
La méthode par pyrolyse est considérée comme la méthode de référence tandis que la méthode hydrostatique est considérée comme une méthode in situ.
La présente Norme européenne comprend la collecte de l’échantillon et la préparation d’échantillons représentatifs sur la base d’un plan d’échantillonnage afin de les caractériser.
La présente Norme européenne ne couvre pas les performances opérationnelles ou l’aptitude à l’emploi des matériaux, considérés dans le cadre d’un accord entre le fabricant et le client.
La présente Norme européenne n’a pas pour but de traiter tous les problèmes de sécurité qui sont, le cas échéant, liés à son utilisation. La présente Norme européenne n’établit pas les pratiques appropriées en matière d’hygiène et de sécurité et ne détermine pas l’applicabilité des restrictions réglementaires avant son utilisation.
Snov iz izrabljenih avtomobilskih gum - Jeklena žica - Ugotavljanje deleža nekovinskih materialov
Ta dokument podaja dve različni metodi za kvantitativno oceno deleža nekovinskih materialov na jekleni žici, ki nastanejo pri predelavi materialov iz izrabljenih avtomobilskih gum.
Metoda s pirolizo se obravnava kot referenčna metoda, hidrostatična metoda pa kot metoda na mestu uporabe.
Ta evropski standard vključuje jemanje vzorcev in pripravo reprezentativnih vzorcev na podlagi načrta vzorčenja za namen njihove karakterizacije.
Ta evropski standard ne zajema operativnega delovanja ali primernosti za uporabo materialov, za katere se šteje, da so predmet dogovora med proizvajalcem in stranko.
Ta evropski standard ne obravnava vseh morebitnih varnostnih težav, ki se nanašajo na njegovo uporabo. Ta evropski standard ne vzpostavlja ustreznih varnostnih in zdravstvenih praks ter ne določa uporabnosti regulativnih omejitev pred njegovo uporabo.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST-TS CEN/TS 17308:2019
01-junij-2019
Snov iz izrabljenih avtomobilskih gum - Jeklena žica - Ugotavljanje deleža
nekovinskih materialov
Materials produced from end of life tyres - Steel wire - Determination of the non-metallic
content
Aus Altreifen gewonnene Materialien - Stahldrähte - Bestimmung der nicht-metallischen
Bestandteile
Pneus usagés non réutilisables (PUNR) - Fils métalliques - Détermination de la teneur
en matériaux non métalliques
Ta slovenski standard je istoveten z: CEN/TS 17308:2019
ICS:
77.140.65 Jeklene žice, jeklene vrvi in Steel wire, wire ropes and
verige link chains
83.160.01 Avtomobilske pnevmatike na Tyres in general
splošno
SIST-TS CEN/TS 17308:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST-TS CEN/TS 17308:2019
---------------------- Page: 2 ----------------------
SIST-TS CEN/TS 17308:2019
CEN/TS 17308
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
April 2019
TECHNISCHE SPEZIFIKATION
ICS 77.140.65; 83.160.01
English Version
Materials produced from end of life tyres - Steel wire -
Determination of the non-metallic content
Pneus usagés non réutilisables (PUNR) - Fils Aus Altreifen gewonnene Materialien - Stahldrähte -
métalliques - Détermination de la teneur en matériaux Bestimmung der nicht-metallischen Bestandteile
non métalliques
This Technical Specification (CEN/TS) was approved by CEN on 21 January 2019 for provisional application.
The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to
submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.
CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS
available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in
parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.
CEN members are the national standards bodies of 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 United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 17308:2019 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST-TS CEN/TS 17308:2019
CEN/TS 17308:2019 (E)
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Testing programme . 7
5 Determination of non-metallic content in steel wire . 7
5.1 General . 7
5.2 Preparation of sampling plan and laboratory sample . 7
5.2.1 Principle of correct sampling . 7
5.2.2 Sampling plan . 7
5.2.3 Definition of lot size . 8
5.2.4 Sampling point and apparatus . 8
5.2.5 Size of a sample increment . 8
5.2.6 Number of sample increments . 8
5.2.7 Metrological characteristics of sampling . 9
5.2.8 Visual assessment . 9
5.3 Storage and transport of laboratory sample(s) . 9
5.4 Laboratory sample(s) and test portion(s) . 9
5.4.1 General principle . 9
5.4.2 Laboratory sample . 9
6 Determination by pyrolysis method . 9
6.1 Principle . 9
6.2 Apparatus . 9
6.2.1 Analytical scales . 9
6.2.2 Pyrolysis set-up. 9
6.2.3 Steel wire cleaning apparatus . 10
6.2.4 Magnets . 12
6.2.5 Tray . 12
6.3 Sampling . 12
6.4 Determination . 12
6.5 Expression of results . 13
7 Determination by hydrostatic method . 13
7.1 Principle . 13
7.2 Pretreatment . 13
7.3 Apparatus . 13
7.3.1 Analytical scale . 13
7.3.2 Hydrostatic apparatus . 13
7.3.3 Reagents . 16
7.4 Procedure. 16
7.5 Calculation . 16
7.6 Metrological characteristics . 17
8 Report . 17
Annex A (informative) Example of a test report sheet . 19
2
---------------------- Page: 4 ----------------------
SIST-TS CEN/TS 17308:2019
CEN/TS 17308:2019 (E)
Annex B (informative) Schematic diagram of a pyrolyzer . 20
Annex C (informative) Explanation of the formula used in the hydrostatic method . 21
Bibliography . 23
3
---------------------- Page: 5 ----------------------
SIST-TS CEN/TS 17308:2019
CEN/TS 17308:2019 (E)
European foreword
This document (CEN/TS 17308:2019) 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.
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.
According to the CEN/CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to announce this Technical Specification: 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.
4
---------------------- Page: 6 ----------------------
SIST-TS CEN/TS 17308:2019
CEN/TS 17308:2019 (E)
1 Scope
This document provides two different methods for the quantitative estimation of non-metallic content
remaining adhered to the steel wire obtained from the recovery of materials from end-of-life tyres.
The pyrolysis method is considered as the reference method while the hydrostatic method is
considered as an in-situ method.
This European Standard includes sample collection and the preparation of representative samples
based on a sampling plan for the purpose of their characterization.
This European Standard does not cover the operational performance or fitness for use of the materials
which are deemed to be a function of agreements between the manufacturer and the customer.
This European Standard does not purport to address all the safety concerns, if any, associated with its
use. This European Standard does not establish appropriate safety and health practices and does not
determine the applicability of regulatory limitations prior to its use.
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.
CEN/TS 14243, Materials produced from end of life tyres — Specification of categories based on their
dimension(s) and impurities and methods for determining their dimension(s) and impurities
3 Terms and definitions
For the purposes of this document, the following terms and definitions 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
3.1
sample
amount of material taken from a population and intended to provide information on the population
3.2
increment
portion of material extracted in a single operation of the sampling device
[SOURCE: ISO 13909-1:2016, 3.15: modified – "fuel" has been replaced with "material"]
3.3
characteristic
property which helps to identify or differentiate items of a given population
Note 1 to entry: The characteristic may be either quantitative (by variables) or qualitative (by attributes).
3.4
lot
defined quantity of material for which a characteristic is to be determined
5
---------------------- Page: 7 ----------------------
SIST-TS CEN/TS 17308:2019
CEN/TS 17308:2019 (E)
Note 1 to entry: In sampling standards, the lot is also designated as the stated size or volume that is considered
appropriate for assessing the material. It follows that variations occurring in the material on any finer scale than
this are deemed not to be of relevance.
3.5
combined sample
sample consisting of all the increments taken from a lot
Note 1 to entry: A combined sample is a quantity of material, representative of the lot for which the quality is to
be determined.
3.6
field sample
sample taken in the field and from which laboratory samples are produced
3.7
laboratory sample
sample or sub-sample sent to or received by the laboratory
[SOURCE: IUPAC definition]
Note 1 to entry: When the laboratory sample has been prepared (reduced) by subdivision, mixing, or crushing,
or by a combination of these processes, it becomes the test sample. A laboratory sample that requires no
preparation can be used directly as the test sample. A test portion is removed from the test sample for testing or
analysis purposes. The laboratory sample is the final sample from the point of view of sample collection, but it is
the initial sample from the point of view of the laboratory.
Note 2 to entry: Several laboratory samples can be prepared and sent to different laboratories, or they can be
sent to the same laboratory for different purposes. In the latter case, they are generally considered to be a single
laboratory sample and documented as such.
3.8
test sample
sample prepared from the laboratory sample, from which the test portions are removed for testing or
for analysis
[SOURCE: IUPAC definition]
3.9
population
totality of items, or total volume of material, to be investigated by sampling
Note 1 to entry: The population will generally be a convenient, well-defined subset of the overall population
(e.g. a year's production of material) that is believed to be typical of that wider population.
3.10
representative sample
sample resulting from a sampling plan that can be expected to reflect adequately the properties of
interest in the parent population
[SOURCE: IUPAC definition]
3.11
probabilistic sampling
sampling conducted according to the statistical principles of sampling
6
---------------------- Page: 8 ----------------------
SIST-TS CEN/TS 17308:2019
CEN/TS 17308:2019 (E)
3.12
steel wire
result of processing end-of-life tyres by which steel wires are separated from textile and rubber
fractions
4 Testing programme
When performing a testing programme for determining product characteristics, all the different
measurement/testing steps are to be considered and specified by means of standards dealing each with
one or several of those steps, thus securing the needed coherence and coordination between these
different testing steps. The steps are:
a) sampling plan;
b) taking field sample(s);
c) storage of the sample(s), transport;
d) pre-treatment, e.g. drying (if needed);
e) quantification, analysis, calculations;
f) overall test report.
When undertaking some or all of these measurement steps, a testing laboratory shall operate with
appropriate equipment and competent personnel so as to fulfill the applicable requirements specified in
the present European Standard. This includes calibration of equipment, e.g. calibration of scales.
5 Determination of non-metallic content in steel wire
5.1 General
Percentage of non-metallic content is a key measurement required for product classification of steel
wire. Before being able to obtain an accurate value, a representative sample of the material to be tested
shall be taken.
5.2 Preparation of sampling plan and laboratory sample
5.2.1 Principle of correct 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). These
principles cannot be fully applied in practice with st
...
SLOVENSKI STANDARD
kSIST-TS FprCEN/TS 17308:2018
01-december-2018
Materiali, izdelani iz izrabljenih pnevmatik - Jeklena žica - Ugotavljanje deleža
nekovinskih materialov
Materials produced from end of life tyres - Steel wire - Determination of the non-metallic
content
Aus Altreifen gewonnene Materialien - Stahldrähte - Bestimmung der nicht-metallischen
Bestandteile
Pneus usagés non réutilisables (PUNR) - Fils métalliques - Détermination de la teneur
en matériaux non métalliques
Ta slovenski standard je istoveten z: FprCEN/TS 17308
ICS:
77.140.65 Jeklene žice, jeklene vrvi in Steel wire, wire ropes and
verige link chains
83.160.01 Avtomobilske pnevmatike na Tyres in general
splošno
kSIST-TS FprCEN/TS 17308:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
kSIST-TS FprCEN/TS 17308:2018
---------------------- Page: 2 ----------------------
kSIST-TS FprCEN/TS 17308:2018
FINAL DRAFT
TECHNICAL SPECIFICATION
FprCEN/TS 17308
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
September 2018
ICS 77.140.65; 83.160.01
English Version
Materials produced from end of life tyres - Steel wire -
Determination of the non-metallic content
Pneus usagés non réutilisables (PUNR) - Fils Aus Altreifen gewonnene Materialien - Stahldrähte -
métalliques - Détermination de la teneur en matériaux Bestimmung der nicht-metallischen Bestandteile
non métalliques
This draft Technical Specification is submitted to CEN members for Vote. It has been drawn up by the Technical Committee
CEN/TC 366.
CEN members are the national standards bodies of 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 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 Technical Specification. It is distributed for review and comments. It is subject to change
without notice and shall not be referred to as a Technical Specification.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. FprCEN/TS 17308:2018 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
kSIST-TS FprCEN/TS 17308:2018
FprCEN/TS 17308:2018 (E)
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Testing programme . 7
5 Determination of non-metallic content in steel wire . 7
5.1 General . 7
5.2 Preparation of sampling plan and laboratory sample . 7
5.2.1 Principle of correct sampling . 7
5.2.2 Sampling plan . 7
5.2.3 Definition of lot size . 8
5.2.4 Sampling point and apparatus . 8
5.2.5 Size of a sample increment . 8
5.2.6 Number of sample increments . 8
5.2.7 Metrological characteristics of sampling . 9
5.2.8 Visual assessment . 9
5.3 Storage and transport of laboratory sample(s) . 9
5.4 Laboratory sample(s) and test portion(s) . 9
5.4.1 General principle . 9
5.4.2 Laboratory sample . 9
6 Determination by pyrolysis method . 9
6.1 Principle . 9
6.2 Apparatus . 9
6.2.1 Analytical scales . 9
6.2.2 Pyrolysis set-up. 9
6.2.3 Steel wire cleaning apparatus . 10
6.2.4 Magnets . 12
6.2.5 Tray . 12
6.3 Sampling . 12
6.4 Determination . 12
6.5 Expression of results . 13
7 Determination by hydrostatic method . 13
7.1 Principle . 13
7.2 Pretreatment . 13
7.3 Apparatus . 13
7.3.1 Analytical scale . 13
7.3.2 Hydrostatic apparatus . 13
7.3.3 Reagents . 16
7.4 Procedure. 16
7.5 Calculation . 16
7.6 Metrological characteristics . 17
8 Report . 17
Annex A (informative) Example of a test report sheet . 19
2
---------------------- Page: 4 ----------------------
kSIST-TS FprCEN/TS 17308:2018
FprCEN/TS 17308:2018 (E)
Annex B (informative) Schematic diagram of a pyrolyzer . 20
Annex C (informative) Explanation of the formula used in the hydrostatic method . 21
Bibliography . 23
3
---------------------- Page: 5 ----------------------
kSIST-TS FprCEN/TS 17308:2018
FprCEN/TS 17308:2018 (E)
European foreword
This document (FprCEN/TS 17308:2018) 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 Vote on TS.
4
---------------------- Page: 6 ----------------------
kSIST-TS FprCEN/TS 17308:2018
FprCEN/TS 17308:2018 (E)
1 Scope
This document provides two different methods for the quantitative estimation of non-metallic content
remaining adhered to the steel wire obtained from the recovery of materials from end-of-life tyres.
The pyrolysis method is considered as the reference method while the hydrostatic method is
considered as an in-situ method.
This European Standard includes sample collection and the preparation of representative samples
based on a sampling plan for the purpose of their characterization.
This European Standard does not cover the operational performance or fitness for use of the materials
which are deemed to be a function of agreements between the manufacturer and the customer.
This European Standard does not purport to address all the safety concerns, if any, associated with its
use. This European Standard does not establish appropriate safety and health practices and does not
determine the applicability of regulatory limitations prior to its use.
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.
CEN/TS 14243, Materials produced from end of life tyres — Specification of categories based on their
dimension(s) and impurities and methods for determining their dimension(s) and impurities
3 Terms and definitions
For the purposes of this document, the following terms and definitions 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
3.1
sample
amount of material taken from a population and intended to provide information on the population
3.2
increment
portion of material extracted in a single operation of the sampling device
[SOURCE: ISO 13909:2009 (all parts) — The definition is adapted]
3.3
characteristic
property which helps to identify or differentiate items of a given population
[SOURCE: ISO 3534-1:2006]
Note 1 to entry: The characteristic may be either quantitative (by variables) or qualitative (by attributes).
3.4
lot
defined quantity of material for which a characteristic is to be determined
5
---------------------- Page: 7 ----------------------
kSIST-TS FprCEN/TS 17308:2018
FprCEN/TS 17308:2018 (E)
Note 1 to entry: In sampling standards, the lot is also designated as the stated size or volume that is considered
appropriate for assessing the material. It follows that variations occurring in the material on any finer scale than
this are deemed not to be of relevance.
3.5
combined sample
sample consisting of all the increments taken from a lot
Note 1 to entry: A combined sample is a quantity of material, representative of the lot for which the quality is to
be determined.
3.6
field sample
sample taken in the field and from which laboratory samples are produced
3.7
laboratory sample
sample or sub-sample sent to or received by the laboratory
[SOURCE: IUPAC definition]
Note 1 to entry: When the laboratory sample has been prepared (reduced) by subdivision, mixing, or crushing,
or by a combination of these processes, it becomes the test sample. A laboratory sample that requires no
preparation can be used directly as the test sample. A test portion is removed from the test sample for testing or
analysis purposes. The laboratory sample is the final sample from the point of view of sample collection, but it is
the initial sample from the point of view of the laboratory.
Note 2 to entry: Several laboratory samples can be prepared and sent to different laboratories, or they can be
sent to the same laboratory for different purposes. In the latter case, they are generally considered to be a single
laboratory sample and documented as such.
3.8
test sample
sample prepared from the laboratory sample, from which the test portions are removed for testing or
for analysis
[SOURCE: IUPAC definition]
3.9
population
totality of items, or total volume of material, to be investigated by sampling
Note 1 to entry: The population will generally be a convenient, well-defined subset of the overall population
(e.g. a year's production of material) that is believed to be typical of that wider population.
3.10
representative sample
sample resulting from a sampling plan that can be expected to reflect adequately the properties of
interest in the parent population
[SOURCE: IUPAC definition]
3.11
probabilistic sampling
sampling conducted according to the statistical principles of sampling
6
---------------------- Page: 8 ----------------------
kSIST-TS FprCEN/TS 17308:2018
FprCEN/TS 17308:2018 (E)
3.12
steel wire
result of processing end-of-life tyres by which steel wires are separated from textile and rubber
fractions
4 Testing programme
When performing a testing programme for determining product characteristics, all the different
measurement/testing steps are to be considered and specified by means of standards dealing each with
one or several of those steps, thus securing the needed coherence and coordination between these
different testing steps. The steps are:
a) sampling plan;
b) taking field sample(s);
c) storage of the sample(s), transport;
d) pre-treatment, e.g. drying (if needed);
e) quantification, analysis, calculations;
f) overall test report.
When undertaking some or all of these measurement steps, a testing laboratory shall operate with
appropriate equipment and competent personnel so as to fulfill the applicable requirements specified in
the present European Standard. This includes calibration of equipment, e.g. calibration of scales.
5 Determination of non-metallic content in steel wire
5.1 General
Percentage of non-metallic content is a key measurement required for product classification of steel
wire. Before being able to obtain an accurate value, a representative sample of the material to be tested
shall be taken.
5.2 Preparation of sampling plan and laboratory sample
5.2.1 Principle of correct 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). These
principles cannot be fully applied in practice with steel wire, so a different procedure is defined to
ensure as much as possible the probabilistic sampling.
NOTE The objective of this procedure is to take samples in a way that is truly representative of the material
produced. It is easier when the material is moving (for example on a conveyor belt). Therefore, sampling from
moving material will be preferred whenever possible.
5.2.2 Sampling plan
A written sampling plan sh
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.