FprEN ISO 17225-4

Solid biofuels - Fuel specifications and classes - Part 4: Graded wood chips (ISO/FDIS 17225-4:2020)

Biogene Festbrennstoffe - Brennstoffspezifikationen und -klassen - Teil 4: Klassifizierung von Holzhackschnitzel (ISO/FDIS 17225-4:2020)

Dieses Dokument legt die qualitätsbezogenen Brennstoffklassen und  spezifikationen für klassifizierte Holzhackschnitzel fest. Dieses Dokument umfasst nur Holzhackschnitzel, die aus folgenden Rohmaterialien hergestellt wurden (siehe ISO 17225 1, Tabelle 1):
—   1.1 Wald  und Plantagenholz sowie anderes naturbelassenes Holz;
—   1.2 Industrie Restholz;
—   1.3.1 Chemisch unbehandeltes Gebrauchtholz.
Dieses Dokument behandelt nur Holzhackschnitzel, die mithilfe von scharfen Werkzeugen hergestellt wurden, und behandelt kein Schredderholz, das mithilfe von stumpfen Werkzeugen hergestellt wurde.

Biocombustibles solides - Classes et spécifications des combustibles - Partie 4: Classes de plaquettes de bois (ISO/FDIS 17225-4:2020)

Trdna biogoriva - Specifikacije goriv in razredi - 4. del: Razvrstitev lesnih sekancev (ISO/FDIS 17225-4:2020)

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN ISO 17225-4:2020
01-april-2020

Trdna biogoriva - Specifikacije goriv in razredi - 4. del: Razvrstitev lesnih sekancev

(ISO/DIS 17225-4:2020)

Solid biofuels - Fuel specifications and classes - Part 4: Graded wood chips (ISO/DIS

17225-4:2020)

Biogene Festbrennstoffe - Brennstoffspezifikationen und -klassen - Teil 4: Klassifizierung

von Holzhackschnitzel (ISO/DIS 17225-4:2020)

Biocombustibles solides - Classes et spécifications des combustibles - Partie 4: Classes

de plaquettes de bois (ISO/DIS 17225-4:2020)
Ta slovenski standard je istoveten z: prEN ISO 17225-4
ICS:
75.160.40 Biogoriva Biofuels
oSIST prEN ISO 17225-4:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 17225-4:2020
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oSIST prEN ISO 17225-4:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 17225-4
ISO/TC 238 Secretariat: SIS
Voting begins on: Voting terminates on:
2020-02-04 2020-04-28
Solid biofuels — Fuel specifications and classes —
Part 4:
Graded wood chips
Biocombustibles solides — Classes et spécifications des combustibles —
Partie 4: Classes de plaquettes de bois
ICS: 27.190; 75.160.40
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
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 17225-4:2020(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 2020
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oSIST prEN ISO 17225-4:2020
ISO/DIS 17225-4:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication 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’s member body in the country of the requester.
ISO copyright office
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Phone: [phone]
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Published in Switzerland
ii © ISO 2020 – All rights reserved
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oSIST prEN ISO 17225-4:2020
ISO/DIS 17225-4:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Symbols and abbreviated terms ........................................................................................................................................................... 2

5 Specification of graded wood chips................................................................................................................................................... 3

Annex A (informative) General guidelines for bulk density of graded wood chips .............................................7

Bibliography ................................................................................................................................................................................................................................ 8

© ISO 2020 – All rights reserved iii
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oSIST prEN ISO 17225-4:2020
ISO/DIS 17225-4:2020(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 TC238, Solid biofuels.

This second edition cancels and replaces the first edition (ISO 17225-4:2014), which has been

technically revised.
The main changes compared to the previous edition are as follows:
— particle size distribution classification updated
— moisture and ash content classes updated
A list of all parts in the ISO 17225 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.
iv © ISO 2020 – All rights reserved
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oSIST prEN ISO 17225-4:2020
ISO/DIS 17225-4:2020(E)
Introduction

The objective of the ISO 17225 series is to provide unambiguous and clear classification principles for

solid biofuels; to serve as a tool to enable efficient trading of solid biofuels; to enable good understanding

between seller and buyer as well as a tool for communication with equipment manufacturers. It also

[2]
facilitates authority permission procedures and reporting .

This part of ISO 17225 supports the use of graded wood chips for small and medium residential,

commercial and public building applications.

Depending on the type of energy conversion technology used (boilers, heaters, gasifiers, etc. see Table

below), the tolerances for a particular quality of wood chips will be different.

The scale used for grouping the applications is for illustration only and in practice, some overlaps

between the applications and the scales are expected.
Scales of applications and their typical operating range
Scale Application
below 100 kW Residential
from 75 kW to 500 kW Small (e.g. residential, public and commercial buildings)
500 kW to 1,5 MW Medium (public and commercial buildings)
1,5 MW to 5 MW Large (Small industrial facilities and district heating)
Over 5 MW Industrial (recommended to use Part 1 or Part 9)

The residential, small and medium commercial and public building applications require high quality

fuel for the following reasons:

• Small-scale equipment usually does not have advanced controls and flue gas cleaning.

• Appliances are not generally managed by professional heating engineers.
• Appliances are often located in residential and populated districts.

NOTE 1 Wood chips produced according to this part of ISO 17225 may be used in boilers tested according to

[1]
EN 303–5 .

NOTE 2 For individual contracts and industrial use, ISO 17225-1 or ISO 17225-9 can be used.

Although these product standards may be obtained separately, they require a general understanding of

the standards based on and supporting ISO 17225-1. It is recommended to obtain and use ISO 17225-1

in conjunction with these standards.
© ISO 2020 – All rights reserved v
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oSIST prEN ISO 17225-4:2020
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oSIST prEN ISO 17225-4:2020
DRAFT INTERNATIONAL STANDARD ISO/DIS 17225-4:2020(E)
Solid biofuels — Fuel specifications and classes —
Part 4:
Graded wood chips
1 Scope

This part of ISO 17225 determines the fuel quality classes and specifications of graded wood chips. This

part of ISO 17225 covers only wood chips produced from the following raw materials (see ISO 17225-1,

Table 1):
• 1.1 Forest, plantation and other virgin wood
• 1.2 By-products and residues from wood processing industry
• 1.3.1 Chemically untreated used wood.

This standard covers only wood chips, which are produced with sharp tools, and does not cover hog

fuel, which is produced with blunt tools.
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 14780, Solid biofuels — Sample preparation
ISO 16559, Solid biofuels — Terminology, definitions and descriptions

ISO 16948, Solid biofuels — Determination of total content of carbon, hydrogen and nitrogen

ISO 16968, Solid biofuels — Determination of minor elements

ISO 16993, Solid biofuels — Conversion of analytical results from one basis to another

ISO 16994, Solid biofuels — Determination of total content of sulfur and chlorine

ISO 17225-1, Solid biofuels — Fuel specifications and classes — Part 1: General requirements

ISO 17827-1, 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
ISO 17828, Solid biofuels — Determination of bulk density
ISO 18122, Solid biofuels — Determination of ash content

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 and stores

© ISO 2020 – All rights reserved 1
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oSIST prEN ISO 17225-4:2020
ISO/DIS 17225-4:2020(E)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 16559 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
chemical treatment
any treatment with chemicals other than air, water or heat
EXAMPLE Glue, paint, laminate.
Note 1 to entry: Examples of chemical treatment are listed in ISO 17225-1.
[SOURCE: ISO 16559]
3.2
contamination
occurrence of any undesirable matter such as chemical, physical an
...