oSIST prEN ISO 17827-2:2023

SLOVENSKI STANDARD
oSIST prEN ISO 17827-2:2023
01-marec-2023
Trdna biogoriva - Določanje porazdelitve velikosti delcev za nekomprimirana
goriva - 2. del: Metoda z vibracijskim sitom z odprtinami 3,15 mm in manj (ISO/DIS
17827-2:2022)
Solid biofuels - Determination of particle size distribution for uncompressed fuels - Part 2:
Vibrating screen method using sieves with aperture of 3,15 mm and below (ISO/DIS
17827-2:2022)
Biogene Festbrennstoffe - Bestimmung der Partikelgrößenverteilung für unkomprimierte
Brennstoffe - Teil 2: Vertikales Rüttelsiebverfahren mit Sieben mit einer Lochgröße von
3,15 mm und darunter (ISO/DIS 17827-2:2022)
Biocombustibles solides - Détermination de la distribution granulométrique des
combustibles non comprimés - Partie 2: Méthode au tamis vibrant d'ouverture de maille
inférieure ou égale à 3,15 mm (ISO/DIS 17827-2:2022)
Ta slovenski standard je istoveten z: prEN ISO 17827-2
ICS:
75.160.40 Biogoriva Biofuels
oSIST prEN ISO 17827-2:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 17827-2:2023

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oSIST prEN ISO 17827-2:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 17827-2
ISO/TC 238 Secretariat: SIS
Voting begins on: Voting terminates on:
2022-12-27 2023-03-21
Solid biofuels — Determination of particle size distribution
for uncompressed fuels —
Part 2:
Vibrating screen method using sieves with aperture of 3,15
mm and below
Biocombustibles solides — Détermination de la distribution granulométrique des combustibles non
comprimés —
Partie 2: Méthode au tamis vibrant d'ouverture de maille inférieure ou égale à 3,15 mm
ICS: 75.160.40; 27.190
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 17827-2:2022(E)
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. © ISO 2022

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oSIST prEN ISO 17827-2:2023
ISO/DIS 17827-2:2022(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 17827-2
ISO/TC 238 Secretariat: SIS
Voting begins on: Voting terminates on:

Solid biofuels — Determination of particle size distribution
for uncompressed fuels —
Part 2:
Vibrating screen method using sieves with aperture of 3,15
mm and below
Biocombustibles solides — Détermination de la distribution granulométrique des combustibles non
comprimés —
Partie 2: Méthode au tamis vibrant d'ouverture de maille inférieure ou égale à 3,15 mm
ICS: 75.160.40; 27.190
This document is circulated as received from the committee secretariat.
COPYRIGHT PROTECTED DOCUMENT
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2022
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
IN ADDITION TO THEIR EVALUATION AS
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TECHNOLOGICAL, COMMERCIAL AND
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STANDARDS MAY ON OCCASION HAVE TO
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CH-1214 Vernier, Geneva
POTENTIAL TO BECOME STANDARDS TO
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WHICH REFERENCE MAY BE MADE IN
Reference number
Email: copyright@iso.org
NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 17827-2:2022(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
  © ISO 2022 – All rights reserved
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022

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oSIST prEN ISO 17827-2:2023
ISO/DIS 17827-2:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 2
5.1 Sieves . 2
5.2 Collecting pan . 2
5.3 Weighing containers . 2
5.4 Brush . 2
5.5 Mechanical sieving equipment . 2
5.6 Balance . 3
6 Sample preparation .3
6.1 Sample size . 3
6.2 Moisture conditioning. 4
7 Procedure .4
8 Calculation . 4
9 Performance characteristics . 6
10 Test report . 6
Annex A (informative) Determination of the median value of a particle size distribution .7
Annex B (informative) Determination of the median value of a particle size distribution .9
Bibliography .10
iii
© ISO 2022 – All rights reserved

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oSIST prEN ISO 17827-2:2023
ISO/DIS 17827-2:2022(E)
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 documents 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
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 238, Solid biofuels.
A list of all parts in the ISO 17827 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.
This second edition cancels and replaces the first edition (ISO 17827-2:2016), which has been technically
revised. The main changes are as follows:
a) Several sieves were removed from the set; the remaining sieves have apertures of 3,15, 2,0, 1,0, 0,5
and 0,1 mm.
b) The table of results was modified and adapted.
c) References were updated.
d) An introduction was added.
e) Editorial changes were made.
iv
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oSIST prEN ISO 17827-2:2023
ISO/DIS 17827-2:2022(E)
Introduction
Particle size and size distribution of uncompressed solid biofuels significantly influence the transport,
handling and combustion properties of solid fuels. Depending on the type of fuel feeding and the type
and size of a conversion plant, fuels of different particle sizes are suitable. Of particular interest are also
the fines fraction and oversized particles. An increased content of fine particles can lead to clogging
in feed systems and unsteady combustion. Oversized particles can block conveying systems or cause
bridging problems in silos and can reduce the bulk density of the fuel. Very fine particles can have
negative health effects and are relevant for explosion protection reasons (< 0,5 mm).
ISO 17827, describing the determination of particle size distribution, consists of the following parts
under the general title Solid biofuels - Determination of particle size distribution for uncompressed
fuels:
Part 1: Oscillating screen method using sieves with apertures of 3,15 mm and above
Part 2: Vibrating screen method using sieves with apertures of 3,15 mm and below
v
© ISO 2022 – All rights reserved

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oSIST prEN ISO 17827-2:2023

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oSIST prEN ISO 17827-2:2023
DRAFT INTERNATIONAL STANDARD ISO/DIS 17827-2:2022(E)
Solid biofuels — Determination of particle size distribution
for uncompressed fuels —
Part 2:
Vibrating screen method using sieves with aperture of 3,15
mm and below
1 Scope
This part of ISO 17827 specifies a method for the determination of the size distribution of particulate
biofuels by the vibrating screen method. The method described is meant for particulate biofuels only,
namely, materials that either have been reduced in size, such as most wood fuels, or are physically in a
particulate form. This part of ISO 17827 applies to particulate uncompressed fuels with a nominal top
size of 3,15 mm and below (e.g. sawdust).
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.
ISO 3310-1, Test sieves — Technical requirements and testing — Part 1: Test sieves of metal wire cloth
ISO 3310-2, Test sieves — Technical requirements and testing — Part 2: Test sieves of perforated metal
plate
ISO 14780, Solid biofuels — Sample preparation
ISO 16559, Solid biofuels — Vocabulary
ISO 17225-1, Solid biofuels — Fuel specifications and classes — Part 1: General requirements
ISO 18134-1, Solid biofuels — Determination of moisture content — Part 1: Reference method
ISO 18134-2, Solid biofuels — Determination of moisture content — Oven dry method — Part 2: Total
moisture — Simplified method
ISO 18135, Solid Biofuels — Sampling
ISO 21945, Solid biofuels — Simplified sampling method for small scale applications
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 16559 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/
1
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