ISO/FDIS 13909-5
(Main)Coal and coke — Mechanical sampling — Part 5: Sampling of coke from moving streams
Coal and coke — Mechanical sampling — Part 5: Sampling of coke from moving streams
ISO 13909-5:2016 specifies procedures and requirements for the design and establishment of sampling schemes for the mechanical sampling of coke from moving streams and the methods of sampling used. The diversity of types of equipment for sampling and the conditions under which mechanical sampling is performed make it inappropriate to specify standard designs for samplers which will be applicable to all situations.
Charbon et coke — Échantillonnage mécanique — Partie 5: Échantillonnage du coke en continu
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ISO/TC 27/SC 4
Coal and coke — Mechanical
Secretariat: SABS
sampling —
Voting begins on:
2025-04-09
Part 5:
Sampling of coke from moving
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Reference number
FINAL DRAFT
International
Standard
ISO/TC 27/SC 4
Coal and coke — Mechanical
Secretariat: SABS
sampling —
Voting begins on:
Part 5:
Sampling of coke from moving
Voting terminates on:
streams
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 SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
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Published in Switzerland Reference number
ii
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Establishing a sampling scheme. 1
4.1 General .1
4.2 Design of the sampling scheme .2
4.2.1 Material to be sampled .2
4.2.2 Parameters to be determined on samples .2
4.2.3 Division of lots .2
4.2.4 Basis of sampling . .2
4.2.5 Precision of sampling .3
4.2.6 Bias of sampling .3
4.3 Precision of results .3
4.3.1 Precision and total variance .3
4.3.2 Primary increment variance .4
4.3.3 Preparation and testing variance .5
4.3.4 Number of sub-lots and number of increments in each sub-lot .5
4.4 Minimum mass of sample .8
4.5 Mass of primary increment .9
4.6 Size analysis .10
5 Methods of sampling .10
5.1 General .10
5.2 Time-basis sampling .10
5.2.1 Method of taking primary increments .10
5.2.2 Sampling interval.11
5.2.3 Mass of increment .11
5.3 Stratified random sampling .11
5.3.1 General .11
5.3.2 Time-basis stratified random sampling .11
5.4 Reference sampling .11
6 Design of mechanical samplers .12
6.1 Safety. 12
6.2 Sampling system . 12
6.2.1 General . 12
6.2.2 Checking for precision and bias . 12
6.2.3 Operation of sampler . 13
6.3 Location of sampling equipment . 13
6.4 General requirements for designing mechanical samplers . 13
6.5 Design of falling-stream-type samplers . 13
6.5.1 General . 13
6.5.2 Cutter velocity .16
6.6 Cross-belt-type primary samplers .16
6.6.1 Operation .16
6.6.2 Design of cross-belt samplers .17
6.6.3 Maintenance of sampling equipment .18
7 Handling and storage of samples . 19
8 Sample preparation .20
9 Minimization of bias . .20
9.1 General . 20
9.2 Spacing of increments . 20
9.3 Incorrectly extracted increments . 20
iii
9.4 Preservation of integrity of sample . 20
9.4.1 General . 20
9.4.2 Precautions to reduce bias .21
10 Verification .21
Bibliography .22
iv
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
I
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ISO TC 27/SC 4 Style Definition
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Formatted: French (France)
Date: 2025-02-19
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ISO/DIS/FDIS 13909-5:2025(en)
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ISO/TC 27/SC 4/WG 10
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Secretariat: SABS
Date: 2025-03-25
Coal and coke – — Mechanical sampling – —
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Part 5:
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Sampling of coke from moving streams
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Houille et coke — Échantillonnage mécanique —
FDIS stage
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All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
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may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
at the address below or ISO'sISO’s member body in the country of the requester.
ISO Copyright Officecopyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva Formatted: zzCopyright address, Adjust space between Latin
and Asian text, Adjust space between Asian text and numbers
Phone: + 41 22 749 01 11
Email: E-mail: copyright@iso.org
Formatted: French (France)
Website: www.iso.org
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and Asian text, Adjust space between Asian text and numbers
Published in Switzerland.
iii
Contents Page
Foreword . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Establishing a sampling scheme . 1
4.1 General . 1
4.2 Design of the sampling scheme . 2
4.3 Precision of results . 4
4.4 Minimum mass of sample . 9
4.5 Mass of primary increment . 9
4.6 Size analysis . 10
5 Methods of sampling . 11
5.1 General . 11
5.2 Time-basis sampling . 11
5.3 Stratified random sampling . 12
5.4 Reference sampling . 12
6 Design of mechanical samplers . 12
6.1 Safety . 12
6.2 Sampling system. 12
6.3 Location of sampling equipment . 14
6.4 General requirements for designing mechanical samplers . 14
6.5 Design of falling-stream-type samplers . 14
6.6 Cross-belt-type primary samplers . 20
7 Handling and storage of samples. 25
8 Sample preparation . 26
9 Minimization of bias . 26
9.1 General . 26
9.2 Spacing of increments . 26
9.3 Incorrectly extracted increments . 26
9.4 Preservation of integrity of sample . 26
10 Verification . 27
Bibliography . 28
iv
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of
ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 27, Coal and coke, Subcommittee SC 4, Sampling.
This third edition cancels and replaces the second edition (ISO 13909-5:2016), which has been technically
revised.
The main changes are as follows:
— — — the title has been modified and aligned with the rest of the ISO 13909 series;
—
A list of all parts in the ISO 13909 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html. Formatted: Default Paragraph Font, English (United
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v
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Coal and coke – mechanical — Mechanical sampling – —
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Part 5:
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Sampling of coke from moving streams
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numbers
1 Scope
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This document specifies procedures and requirements for the design and establishment of sampling schemes
for the mechanical sampling of coke from moving streams and the methods of sampling used. Formatted: Default Paragraph Font
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The diversity of types of equipment for sampling and the conditions under which mechanical sampling is Adjust space between Asian text and numbers, Tab stops: Not
at 0.7 cm + 1.4 cm + 2.1 cm + 2.8 cm + 3.5 cm + 4.2
performed make it inappropriate to specify standard designs for samplers which will be applicable to all
cm + 4.9 cm + 5.6 cm + 6.3 cm + 7 cm
situations.
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2 Normative references
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The following documents are referred to in the text in such a way that some or all of their content constitutes
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requirements of this document. For dated references, only the edition cited applies. For undated references,
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the latest edition of the referenced document (including any amendments) applies.
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1) Formatted: Default Paragraph Font
ISO 13909--1:—,:— , Coal and coke — Mechanical sampling — Part 1: General introduction
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ISO 13909--6, Coal and coke — Mechanical sampling — Part 6: Preparation of test samples of coke
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ISO 13909--7, Coal and coke — Mechanical sampling — Part 7: Methods for determining the precision of
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sampling, sample preparation and testing
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ISO 13909--8, Coal and coke — Mechanical sampling — Part 8: Methods of testing for bias Formatted: Default Paragraph Font
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ISO 21398, CoalHard coal and coke — Guidance to the inspection of mechanical sampling systems
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3 Terms and definitions
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For the purposes of this part of ISO 13909document, the terms and definitions given in ISO 13909--1 apply.
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ISO and IEC maintain terminology databases for use in standardization at the following addresses:
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— — ISO Online browsing platform: available at https://www.iso.org/obp
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— — IEC Electropedia: available at https://www.electropedia.org/
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4 Establishing a sampling scheme
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4.1 General
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The general procedure for establishing a sampling scheme is as follows:
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a) a) Definedefine the quality parameters to be determined and the types of samples required;
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b) b) Definedefine the lot;
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Under preparation. Stage at the time of publication: ISO/FDIS 13909-1:2025.
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c) c) Definedefine or assume the precision required (see 4.3.14.3.1););
d) d) Determinedetermine the method of combining the increments into a sample, or number of sub-lot
samples, and the method of sample preparation (see ISO 13909--6);
e) e) Determinedetermine or assume the variability of the coke (see 4.3.24.3.2)) and the variance of
preparation and testing (see 4.3.34.3.3).). Methods for determining variability and the variance of
preparation and testing are given in ISO 13909--7;
f) f) Establishestablish the number of sub-lots and the number of increments per sub-lot required to attain
the desired precision (see 4.3.44.3.4););
g) g) Definedefine the sampling interval (see Clause 5Clause 5););
h) h) Ascertainascertain the nominal
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