Solid biofuels - Fuel specifications and classes - Part 9: Graded hog fuel and wood chips for industrial use (ISO 17225-9:2021)

This document determines the fuel quality classes and specifications of graded hog fuel and wood chips for industrial use. It covers only hog fuel and 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;
— 1.4 blends and mixtures.
This document covers hog fuel, which is produced with blunt tools, and wood chips, which are produced with sharp tools.
NOTE 1 1.2.2 By-products and residues from wood processing industry, which can include chemically treated material (e.g. glued, painted, laminated) are not allowed include halogenated organic compounds or heavy metals at levels higher than those in typical virgin material values (see Annex B in ISO 17225-1) or higher than typical values of the country of origin.
NOTE 2 If class I4 includes chemically treated used wood (1.3.2), it can be only used in the installations permitted to use 1.3.2.

Biogene Festbrennstoffe - Brennstoffspezifikationen und -klassen - Teil 9: Klassifizierung von grobem Schredderholz und Holzhackschnitzel für die industrielle Verwendung (ISO 17225-9:2021)

Dieses Dokument legt die qualitätsbezogenen Brennstoffklassen und -spezifikationen für klassifiziertes grobes Schredderholz und klassifizierte Holzhackschnitzel für die industrielle Verwendung fest. Es umfasst nur grobes Schredderholz und 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 Gebrauchtholz;
—   1.4 Definierte und undefinierte Mischungen.
Dieses Dokument behandelt grobes Schredderholz, das aus Stücken unterschiedlicher Größe und Gestalt besteht, hergestellt durch Zerkleinern mit stumpfen Werkzeugen, wie z. B. Walzen, Hämmern oder Schlegeln, und Holzhackschnitzel, die als gehackte holzartige Biomasse mit einer fast rechteckigen Form und einer typischen Länge von 5 mm bis 50 mm, typischerweise in Form von Stücken mit einer festgelegten Partikelgröße, hergestellt durch mechanische Behandlung mit scharfen Werkzeugen, wie z. B. Messern, definiert sind.
Siehe 1.1.2 in ISO 17225 1, Tabelle 1 in Bezug auf Nebenprodukte und Rückstände aus der holzverarbeitenden Industrie, die chemisch behandeltes Material (z. B. verleimtes, angestrichenes, laminiertes Material) enthalten können, dürfen keine halogen-organischen Verbindungen oder Schwermetalle in Konzentrationen enthalten, die über denen der typischen Werte für naturbelassenes Material oder der typischen Werte für das Herkunftsland liegen (siehe ISO 17225 1, Anhang B).
ANMERKUNG   Wenn 1.4 Definierte und undefinierte Mischungen 1.3.2 Chemisch behandeltes Gebrauchtholz enthält, kann es nur in den Anlagen verwendet werden, die für die Verwendung von 1.3.2 zugelassen sind.

Biocombustibles solides - Classes et spécifications des combustibles - Partie 9: Plaquettes et broyat de bois à usage industriel (ISO 17225-9:2021)

Trdna biogoriva - Specifikacije goriv in razredi - 9. del: Klasifikacija grobo drobljenega lesa in sekancev za industrijsko uporabo (ISO 17225-9:2021)

General Information

Status
Published
Public Enquiry End Date
30-Nov-2020
Publication Date
07-Sep-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
02-Aug-2021
Due Date
07-Oct-2021
Completion Date
08-Sep-2021

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SLOVENSKI STANDARD
SIST EN ISO 17225-9:2021
01-oktober-2021
Trdna biogoriva - Specifikacije goriv in razredi - 9. del: Klasifikacija grobo
drobljenega lesa in sekancev za industrijsko uporabo (ISO 17225-9:2021)

Solid biofuels - Fuel specifications and classes - Part 9: Graded hog fuel and wood chips

for industrial use (ISO 17225-9:2021)

Biogene Festbrennstoffe - Brennstoffspezifikationen und -klassen - Teil 9: Klassifizierung

von grobem Schredderholz und Holzhackschnitzel für die industrielle Verwendung (ISO

17225-9:2021)
Biocombustibles solides - Classes et spécifications des combustibles - Partie 9:
Plaquettes et broyat de bois à usage industriel (ISO 17225-9:2021)
Ta slovenski standard je istoveten z: EN ISO 17225-9:2021
ICS:
75.160.10 Trda goriva Solid fuels
SIST EN ISO 17225-9:2021 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN ISO 17225-9:2021
---------------------- Page: 2 ----------------------
SIST EN ISO 17225-9:2021
EN ISO 17225-9
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2021
EUROPÄISCHE NORM
ICS 27.190; 75.160.40
English Version
Solid biofuels - Fuel specifications and classes - Part 9:
Graded hog fuel and wood chips for industrial use (ISO
17225-9:2021)

Biocombustibles solides - Classes et spécifications des Biogene Festbrennstoffe - Brennstoffspezifikationen

combustibles - Partie 9: Plaquettes et broyat de bois à und -klassen - Teil 9: Klassifizierung von grobem

usage industriel (ISO 17225-9:2021) Schredderholz und Holzhackschnitzel für die
industrielle Verwendung (ISO 17225-9:2021)
This European Standard was approved by CEN on 8 July 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, 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

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17225-9:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 17225-9:2021
EN ISO 17225-9:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST EN ISO 17225-9:2021
EN ISO 17225-9:2021 (E)
European foreword

This document (EN ISO 17225-9:2021) has been prepared by Technical Committee ISO/TC 238 "Solid

biofuels" in collaboration with Technical Committee CEN/TC 335 “Solid biofuels” the secretariat of

which is held by SIS.

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 January 2022, and conflicting national standards shall

be withdrawn at the latest by January 2022.

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.

Any feedback and questions on this document should be directed to the users’ national standards

body/national committee. A complete listing of these bodies can be found on the CEN websites.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 17225-9:2021 has been approved by CEN as EN ISO 17225-9:2021 without any

modification.
---------------------- Page: 5 ----------------------
SIST EN ISO 17225-9:2021
---------------------- Page: 6 ----------------------
SIST EN ISO 17225-9:2021
INTERNATIONAL ISO
STANDARD 17225-9
First edition
2021-07
Solid biofuels — Fuel specifications
and classes —
Part 9:
Graded hog fuel and wood chips for
industrial use
Biocombustibles solides — Classes et spécifications des
combustibles —
Partie 9: Plaquettes et broyat de bois à usage industriel
Reference number
ISO 17225-9:2021(E)
ISO 2021
---------------------- Page: 7 ----------------------
SIST EN ISO 17225-9:2021
ISO 17225-9:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 17225-9:2021
ISO 17225-9:2021(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 hog fuel and wood chips for industrial use ...............................................................3

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

© ISO 2021 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 17225-9:2021
ISO 17225-9:2021(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.

This document replaces ISO/TS 17225-9:2020, which has been technically revised. The main changes

are:
— general definitions;
— updated particle size distribution.
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 2021 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 17225-9:2021
ISO 17225-9:2021(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 biofuels; to enable good understanding

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

facilitates authority permission procedures and reporting.

This document supports the use of graded hog fuel and wood chips for industrial heat and power

generation applications, which require graded hog fuel and/or wood chips.
NOTE For individual contracts, ISO 17225-1 can be used.

Although this document may be obtained separately, it requires 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 this document.
© ISO 2021 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 17225-9:2021
---------------------- Page: 12 ----------------------
SIST EN ISO 17225-9:2021
INTERNATIONAL STANDARD ISO 17225-9:2021(E)
Solid biofuels — Fuel specifications and classes —
Part 9:
Graded hog fuel and wood chips for industrial use
1 Scope

This document determines the fuel quality classes and specifications of graded hog fuel and wood chips

for industrial use. It covers only hog fuel and 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 Used wood;
— 1.4 Blends and mixtures.

This document covers hog fuel that has pieces of varying size and shape, produced by crushing with

blunt tools such as rollers, hammers, or flails, and wood chips which are defined as chipped woody

biomass with a sub-rectangular shape and a typical length of 5 mm to 50 mm typically in the form of

pieces with a defined particle size produced by mechanical treatment with sharp tools such as knives.

See 1.1.2 in ISO 17225-1, Table 1 for by-products and residues from wood processing industry, which

can include chemically treated material (e.g. glued, painted, laminated), are not allowed to contain

halogenated organic compounds or heavy metals at levels higher than those in typical virgin material

values or higher than typical values of the country of origin (see Annex B in ISO 17225-1).

NOTE If 1.4 Blends and mixtures includes 1.3.2 Chemically treated used wood, it can be only used in the

installations permitted to use 1.3.2.
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 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 18122, Solid biofuels — Determination of ash content
ISO 18125, Solid biofuels — Determination of calorific value
© ISO 2021 – All rights reserved 1
---------------------- Page: 13 ----------------------
SIST EN ISO 17225-9:2021
ISO
...

SLOVENSKI STANDARD
oSIST prEN ISO 17225-9:2020
01-november-2020
Trdna biogoriva - Specifikacije goriv in razredi - 9. del: Klasifikacija grobo
drobljenega lesa in sekancev za industrijsko uporabo (ISO/DIS 17225-9:2020)

Solid biofuels - Fuel specifications and classes - Part 9: Graded hog fuel and wood chips

for industrial use (ISO/DIS 17225-9:2020)

Biogene Festbrennstoffe - Brennstoffspezifikationen und -klassen - Teil 9: Klassifizierung

von grobem Schredderholz und Holzhackschnitzel für die industrielle Verwendung
(ISO/DIS 17225-9:2020)
Biocombustibles solides - Classes et spécifications des combustibles - Partie 9:
Plaquettes et broyat de bois à usage industriel (ISO/DIS 17225-9:2020)
Ta slovenski standard je istoveten z: prEN ISO 17225-9
ICS:
75.160.10 Trda goriva Solid fuels
oSIST prEN ISO 17225-9:2020 en,fr,de

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

---------------------- Page: 1 ----------------------
oSIST prEN ISO 17225-9:2020
---------------------- Page: 2 ----------------------
oSIST prEN ISO 17225-9:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 17225-9
ISO/TC 238 Secretariat: SIS
Voting begins on: Voting terminates on:
2020-09-15 2020-12-08
Solid biofuels — Fuel specifications and classes —
Part 9:
Graded hog fuel and wood chips for industrial use
Biocombustibles solides — Classes et spécifications des combustibles —
Partie 9: Plaquettes et broyat de bois à usage industriel
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 17225-9:2020(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
---------------------- Page: 3 ----------------------
oSIST prEN ISO 17225-9:2020
ISO/DIS 17225-9:2020(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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 17225-9:2020
ISO/DIS 17225-9:2020(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 hog fuel and wood chips for industrial use ...............................................................3

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

© ISO 2020 – All rights reserved iii
---------------------- Page: 5 ----------------------
oSIST prEN ISO 17225-9:2020
ISO/DIS 17225-9:2020(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 ISO/TC 238, Solid biofuels.
This is the first edition (ISO 17225-9), which has been technically revised.
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
---------------------- Page: 6 ----------------------
oSIST prEN ISO 17225-9:2020
ISO/DIS 17225-9:2020(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 biofuels; to enable good understanding

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

facilitates authority permission procedures and reporting.

This document supports the use of graded hog fuel and wood chips for industrial heat and power

generation applications, which require graded hog fuel and/or wood chips.
NOTE 1 For individual contracts, ISO 17225-1 can be used.

Although this document may be obtained separately, it requires 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 this document.

The International Organization for Standardization (ISO) [and/or] International Electrotechnical

Commission (IEC) draw[s] attention to the fact that it is claimed that compliance with this document

may involve the use of a patent.

ISO [and/or] IEC take[s] no position concerning the evidence, validity and scope of this patent right.

The holder of this patent right has assured ISO [and/or] IEC that he/she is willing to negotiate licences

under reasonable and non-discriminatory terms and conditions with applicants throughout the world.

In this respect, the statement of the holder of this patent right is registered with ISO [and/or] IEC.

Information may be obtained from the patent database available at www .iso .org/ patents.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights other than those in the patent database. ISO [and/or] IEC shall not be held responsible for

identifying any or all such patent rights.
© ISO 2020 – All rights reserved v
---------------------- Page: 7 ----------------------
oSIST prEN ISO 17225-9:2020
---------------------- Page: 8 ----------------------
oSIST prEN ISO 17225-9:2020
DRAFT INTERNATIONAL STANDARD ISO/DIS 17225-9:2020(E)
Solid biofuels — Fuel specifications and classes —
Part 9:
Graded hog fuel and wood chips for industrial use
1 Scope

This document determines the fuel quality classes and specifications of graded hog fuel and wood chips

for industrial use. It covers only hog fuel and 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;
— 1.4 blends and mixtures.

This document covers hog fuel, which is produced with blunt tools, and wood chips, which are produced

with sharp tools.

NOTE 1 1.2.2 By-products and residues from wood processing industry, which can include chemically treated

material (e.g. glued, painted, laminated) are not allowed include halogenated organic compounds or heavy metals

at levels higher than those in typical virgin material values (see Annex B in ISO 17225-1) or higher than typical

values of the country of origin.

NOTE 2 If class I4 includes chemically treated used wood (1.3.2), it can be only used in the installations

permitted to use 1.3.2.
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 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 18122, Solid biofuels — Determination of ash content
ISO 18125, Solid biofuels — Determination of calorific value
© ISO 2020 – All rights reserved 1
---------------------- Page: 9 ----------------------
oSIST prEN ISO 17225-9:2020
ISO/DIS 17225-9:2020(E)

ISO 18134-2, Solid biofuels — Determination of moisture content — Oven dry method — Part 2: Total

moisture — Simplified method
ISO 18135, Solid Biofuels — Sampling

ISO 19743, Solid biofuels — Determination of content of heavy extraneous materials larger than 3,15 mm

3 Terms and definitions

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:—, Annex A.

3.2
contamination

occurrence of any undesirable matter such as chemical, physical and/or microbiological matter in

the product
[SOURCE: ISO 22716:2007, 2.10]
3.3
heavy extraneous materials

extraneous substances ≥3,15 mm with a specific density >1 g/cm of the dry matter in the fuel.

Note 1 to entry: Most of the particles are inorganic material, e.g. stones, glass or metal, but it also can include

particles of non-biogenic origin e.g. plastic or rubber.
3.4
inorganic matter
non-combustible fraction of a fuel
[SOURCE: ISO 16559:2014, 4.123]
4 Symbols and abbreviated terms

The symbols and abbreviated terms used in document comply with the SI system of units as far as

possible.
A Designation for ash con
...

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