EN 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)

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.

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)

Le présent document détermine les classes et spécifications de qualité du combustible pour plaquettes et broyat de bois à usage industriel. Il couvre uniquement les plaquettes et le broyat de bois produits à partir des matières premières suivantes (voir l'ISO 17225-1, Tableau 1):
—    1.1 Bois de forêt, de plantation et autres bois vierges;
—    1.2 Produits dérivés et sous-produits de l'industrie de transformation du bois;
—    1.3 Bois usagé;
—    1.4 Assortiments et mélanges.
Le présent document couvre le broyat de bois se présentant sous forme de morceaux de taille et de forme différentes produits par le broyage à l'aide d'outils percutants tels que des rouleaux, marteaux ou fléaux, et les plaquettes de bois définies telles qu'une biomasse ligneuse déchiquetée de forme subrectangulaire et d'une longueur type comprise entre 5 mm et 50 mm, généralement sous forme de morceaux de granulométrie définie produits par procédé mécanique à l'aide d'outils tranchants tels que des couteaux.
Voir 1.1.2 de l'ISO 17225-1, Tableau 1, pour les produits dérivés et sous-produits de l'industrie de transformation du bois qui peuvent inclure les matériaux traités chimiquement (par exemple collés, peints, stratifiés) et qui ne sont pas autorisés à contenir des composés organiques halogénés ou des métaux lourds à des niveaux supérieurs à ceux des valeurs types des matériaux vierges ou supérieurs aux valeurs types du pays d'origine (voir Annexe B de l'ISO 17225-1).
NOTE       Si les assortiments et mélanges (1.4) incluent du bois usagé traité chimiquement (1.3.2), ils ne peuvent être utilisés que dans les installations autorisées à utiliser ce type de produit (1.3.2).

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
• Publication Date: 20-Jul-2021
• Withdrawal Date: 30-Jan-2022
• ICS: 27.190 - Biological sources and alternative sources of energy
• ICS: 75.160.40 - Biofuels
• Technical Committee: CEN/TC 335 - Solid biofuels
• Drafting Committee: CEN/TC 335 - Solid biofuels
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 21-Jul-2021
• Due Date: 15-Apr-2023
• Completion Date: 21-Jul-2021
• Ref Project: SIST EN 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)

Overview

EN ISO 17225-9:2021 - "Solid biofuels - Fuel specifications and classes - Part 9: Graded hog fuel and wood chips for industrial use" (CEN adoption of ISO 17225-9:2021) defines fuel quality classes and specifications for industrial-grade hog fuel and wood chips. It applies to fuels produced from forest/plantation wood, wood-processing by‑products and residues, used wood, and blends. The standard supports clear trading, consistent quality assessment, and safe use of these solid biofuels in industrial heat and power applications.

Key topics and technical requirements

• Fuel types & definitions:
  • Hog fuel - irregular pieces produced by crushing with blunt tools (rollers, hammers, flails).
  • Wood chips - sub‑rectangular chipped biomass, typical length 5 mm to 50 mm, produced by sharp tools (knives).
• Fuel quality classes: Property classes (I1–I4) group fuels by origin and typical quality (I1 = virgin/untreated materials; I2–I4 include progressively broader material sources, including some treated or used wood under restrictions).
• Restrictions on chemically treated materials: Chemically treated by‑products or used wood must not exceed typical virgin wood levels of halogenated organic compounds or heavy metals. If blends include chemically treated used wood (1.3.2), use is limited to installations permitted to accept it.
• Sampling, sample preparation and analysis: Sampling per ISO 18135 or ISO 21945; sample preparation per ISO 14780. Analyses referenced include methods for moisture (ISO 18134‑1/2), ash (ISO 18122), calorific value (ISO 18125), sulfur/chlorine (ISO 16994), minor elements (ISO 16968), elemental analysis (ISO 16948) and particle size (ISO 17827‑1).
• Contaminants & extraneous materials: Defines heavy extraneous materials (≥3.15 mm, density >1 g/cm3) and addresses contamination (chemical, physical, microbiological).

Applications and users

• Who uses it: biomass producers, wood chip and hog fuel suppliers, industrial boiler and CHP plant operators, fuel traders, equipment manufacturers, procurement managers, and regulatory bodies.
• Practical uses:
  • Standardizing product specs for contracts and trading.
  • Ensuring feedstock compatibility with combustion equipment and emissions requirements.
  • Guiding quality control, sampling and laboratory testing procedures.
  • Supporting permitting, reporting and communication between sellers, buyers and manufacturers.

Related standards

• ISO 17225‑1 (General requirements and classification principles) - recommended to use in conjunction with Part 9.
• Sampling & test methods: ISO 14780, ISO 18135, ISO 21945, ISO 17827‑1, ISO 18122, ISO 18125, ISO 18134‑1/2, ISO 16948, ISO 16968, ISO 16994.

Keywords: EN ISO 17225-9:2021, graded hog fuel, wood chips, solid biofuels, fuel specifications, particle size, moisture content, ash content, sampling, industrial biomass.

Standards Content (Sample)

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

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.

Contents Page
European foreword . 3

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.
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
ISO 17225-9:2021(E)
© 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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

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 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

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.
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
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