EN ISO 9151:2016

Protective clothing against heat and flame - Determination of heat transmission on exposure to flame (ISO 9151:2016, Corrected version 2017-03)

ISO 9151:2016 specifies a method for determining the heat transmission through materials or material assemblies used in protective clothing. Materials may then be ranked by comparing heat transfer indices, which provide an indication of the relative heat transmission under the specified test conditions. The heat transfer index should not be taken as a measure of the protection time given by the tested materials under actual use conditions.

Schutzkleidung gegen Hitze und Flammen - Bestimmung des Wärmedurchgangs bei Flammeneinwirkung (ISO 9151:2016, korrigierte Fassung 2017-03)

Dieses Dokument legt ein Verfahren für die Bestimmung des Wärmedurchgangs bei in Schutzkleidung verwendeten Materialien oder Materialkombinationen fest. Durch Vergleich der Wärmeübergangsindizes, die als Anhaltspunkt für den relativen Wärmedurchgang unter den festgelegten Prüfbedingungen dienen, kann eine Einstufung der Materialien vorgenommen werden. Der Wärmeübergangsindex sollte nicht als Maß für die angegebene Schutzdauer der geprüften Materialien unter tatsächlichen Einsatzbedingungen angesehen werden.

Vêtements de protection contre la chaleur et les flammes - Détermination de la transmission de chaleur à l'exposition d'une flamme (ISO 9151:2016, Version corrigée 2017-03)

ISO 9151:2016 spécifie une méthode qui vise à déterminer la transmission de chaleur à travers des matériaux ou des assemblages de matériaux utilisés dans les vêtements de protection. Cette méthode permet ensuite de classer les matériaux en comparant les indices de transmission de chaleur, lesquels constituent une indication de la transmission de chaleur relative dans les conditions d'essai spécifiées. Il convient de ne pas considérer l'indice de transmission de chaleur comme une mesure de la durée de protection offerte par les matériaux soumis à essai dans des conditions réelles d'utilisation.

Varovalna obleka pred učinki toplote in ognja - Določanje prenosa toplote pri izpostavljenosti plamenu (ISO 9151:2016, popravljena verzija 2017-03)

Ta mednarodni standard določa metodo za primerjavo prenosa toplote skozi materiale ali kombinacije materialov, ki se uporabljajo pri zaščitnih oblekah. Materiali so razvrščeni s pomočjo izračuna indeksa prenosa toplote, ki kaže relativni prenos toplote pri določenih preskusnih pogojih. Indeks prenosa toplote naj se ne uporablja kot merilo za čas trajanja zaščite, ki ga omogočajo preskusni materiali pri dejanskih pogojih uporabe.

General Information

• Status: Published
• Publication Date: 06-Dec-2016
• Withdrawal Date: 29-Jun-2017
• ICS: 13.340.10 - Protective clothing
• Technical Committee: CEN/TC 162 - Protective clothing including hand and arm protection and lifejackets
• Drafting Committee: CEN/TC 162/WG 2 - Resistance to heat and fire of protective clothing
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 07-Dec-2016
• Completion Date: 07-Dec-2016
• Directive: 2016/425 - Regulation (EU) 2016/425 of the European Parliament and of the Council of 9 March 2016 on personal protective equipment and repealing Council Directive 89/686/EEC
• Directive: 89/686/EEC - Council Directive 89/686/EEC of 21 December 1989 on the approximation of the laws of the Member States relating to personal protective equipment
• Mandate: M/031 - Standardization mandate to CEN/CENELEC concerning standards for Personal Protective Equipment
• Ref Project: SIST EN ISO 9151:2017 - Protective clothing against heat and flame - Determination of heat transmission on exposure to flame (ISO 9151:2016, Corrected version 2017-03)

Relations

• Replaces: EN 367:1992 - Protective clothing - Protection against heat and fire - Method of determining heat transmission on exposure to flame
• Effective Date: 08-Jun-2022
• Replaces: EN 367:1992/AC:1992 - Protective clothing - Protection against heat and fire - Method of determining heat transmission on exposure to flame
• Effective Date: 14-Dec-2016

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2017
1DGRPHãþD
SIST EN 367:1996
SIST EN 367:1996/AC:2000
9DURYDOQDREOHNDSUHGXþLQNLWRSORWHLQRJQMD'RORþDQMHSUHQRVDWRSORWHSUL
L]SRVWDYOMHQRVWLSODPHQX,62
Protective clothing against heat and flame - Determination of heat transmission on
exposure to flame (ISO 9151:2016)
Schutzkleidung gegen Hitze und Flammen - Bestimmung des Wärmedurchgangs bei
Flammeneinwirkung (ISO 9151:2016)
Vêtements de protection contre la chaleur et les flammes - Détermination de la
transmission de chaleur à l'exposition d'une flamme (ISO 9151:2016)
Ta slovenski standard je istoveten z: EN ISO 9151:2016
ICS:
13.340.10 Varovalna obleka Protective clothing
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 9151
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2016
EUROPÄISCHE NORM
ICS 13.340.10 Supersedes EN 367:1992
English Version
Protective clothing against heat and flame - Determination
of heat transmission on exposure to flame (ISO
9151:2016)
Vêtements de protection contre la chaleur et les Schutzkleidung gegen Hitze und Flammen -
flammes - Détermination de la transmission de chaleur Bestimmung des Wärmedurchgangs bei
à l'exposition d'une flamme (ISO 9151:2016) Flammeneinwirkung (ISO 9151:2016)
This European Standard was approved by CEN on 6 November 2016.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9151:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 89/686/EEC . 4

European foreword
This document (EN ISO 9151:2016) has been prepared by Technical Committee ISO/TC 94 "Personal
safety - Protective clothing and equipment" in collaboration with Technical Committee CEN/TC 162
“Protective clothing including hand and arm protection and lifejackets” the secretariat of which is held
by DIN.
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 June 2017, and conflicting national standards shall be
withdrawn at the latest by June 2017.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN 367:1992.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this
document.
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, Former Yugoslav Republic of Macedonia, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 9151:2016 has been approved by CEN as EN ISO 9151:2016 without any modification.
Annex ZA
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 89/686/EEC
This European Standard has been prepared under a Commission’s standardization request M/031 to
provide one voluntary means of conforming to essential requirements of Directive 89/686/EEC on the
approximation of the laws of the Member States relating to personal protective equipment.
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZA.1 confers, within the limits of
the scope of this standard, a presumption of conformity with the corresponding essential requirements
of that Directive and associated EFTA regulations.
Table ZA.1 — Correspondence between this International Standard and Annex II of the Directive
89/686/EEC Personal Protective Equipment
Essential Requirements of Directive Clause(s)/subclause(s) of
Remarks/Notes
89/686/EEC this International Standard
Together with the
3.6, Protection against heat and/or fire Complete Standard requirements in the product
standard
WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European
Standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
INTERNATIONAL ISO
STANDARD 9151
Second edition
2016-11-15
Protective clothing against heat
and flame — Determination of heat
transmission on exposure to flame
Vêtements de protection contre la chaleur et les flammes —
Détermination de la transmission de chaleur à l’exposition d’une
flamme
Reference number
ISO 9151:2016(E)
©
ISO 2016
ISO 9151:2016(E)
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2016 – All rights reserved

ISO 9151:2016(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 General . 2
5.2 Gas burner . . 2
5.3 Copper disc calorimeter and mounting block . 2
5.4 Specimen support frame . 5
5.5 Calorimeter location plate. 6
5.6 Support stand . 6
5.7 Recorder . 8
5.8 Flat rigid template . 8
6 Precautions . 9
7 Sampling . 9
7.1 Specimen dimensions . 9
7.2 Number of specimens . 9
8 Conditioning and testing atmospheres . 9
8.1 Conditioning atmosphere . 9
8.2 Testing atmosphere. 9
9 Test procedure . 9
9.1 Preparation and calibration . 9
9.1.1 Preliminary procedures . 9
9.1.2 Regulation of the incident heat flux .10
9.2 Test specimen mounting .11
9.3 Test specimen exposure .11
10 Test report (see Annex C) .12
Annex A (informative) Significance of the heat transfer test .13
Annex B (informative) Availability of materials .15
Annex C (informative) Example test report form .16
ISO 9151:2016(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. 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. 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 on 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 the following URL: http://www.iso.org/iso/
foreword.html
The committee responsible for this document is ISO/TC 94, Personal safety — Protective clothing and
equipment, Subcommittee SC 13, Protective clothing and by Technical Committee CEN/TC 162, Protective
clothing including hand and arm protection and lifejackets in collaboration.
This second edition cancels and replaces the first edition (ISO 9151:1995), of which Clauses/subclauses
2, 3.3, 5.1, 5.2, 5.3, 5.6, 6, 8.1, 8.2, 9.1.2, 9.3.1, 9.3.2, 10, all figures, and Annexes A and B have been
technically revised. Tolerances have been added to specified dimensions where appropriate. Results of
a recent inter-laboratory trial have been added to Annex A.
To improve reproducibility, the following major modifications have been made from the previous
version of this test method:
a) The percentage minimum purity of the propane used has been provided (see 5.2);
b) Two alternative methods for constructing the calorimeter are described with additional
information on the figures; additional instructions are given for inserting the calorimeter into the
mounting block; and the total mass of the calorimeter and mounting block is specified (see 5.3);
c) Tolerances for the dimensions of machined parts have been added to text and drawings where
required;
d) Control of air movement during testing is specified (see Clause 6);
e) The specified relative humidity and temperature ranges for the conditioning and testing
atmospheres have been changed (see 8.1 and 8.2);
f) Additional procedures for calibration and stabilization of thermocouple temperature, including a
procedure to check on the linearity of the thermocouple output during regulation of the incident
heat flux density, have been added (see 9.1.1 and 9.1.2); and
g) Test report requirements have been revised (see Clause 10).
iv © ISO 2016 – All rights reserved

ISO 9151:2016(E)
Introduction
Heat transmission through clothing is largely determined by its thickness including any air gaps
trapped between adjacent layers. The air gaps can vary considerably in different areas of the same
clothing assembly. The present method provides a grading of materials when tested under standard
test conditions without an air gap.
INTERNATIONAL STANDARD ISO 9151:2016(E)
Protective clothing against heat and flame —
Determination of heat transmission on exposure to flame
1 Scope
This document specifies a method for determining the heat transmission through materials or
material assemblies used in protective clothing. Materials may then be ranked by comparing heat
transfer indices, which provide an indication of the relative heat transmission under the specified test
conditions. The heat transfer index should not be taken as a measure of the protection time given by the
tested materials under actual use conditions.
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 5725-2, Accuracy (trueness and precision) of measurement methods and results — Part 2: Basic method
for the determination of repeatability and reproducibility of a standard measurement method
IEC 60584-1, Thermocouples — Part 1: Reference tables
IEC 60584-3, Thermocouples — Part 3: Extension and compensating cables — Tolerances and
identification systems
3 Terms and definitions
For the purposes of this document, the following definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
test specimen
all the layers of fabric or other materials arranged in the order and orientation as used in practice,
including, where applicable, undergarment fabrics
3.2
incident heat flux
Q
amount of energy applied to the exposed face of the specimen, per unit time
Note 1 to entry: The unit is kW/m .
ISO 9151:2016(E)
3.3
heat transfer index
HTI
mean time, t , in whole seconds to achieve a temperature rise of (24 ± 0,2) °C when tested by
m
the method described in this document using a copper disc of mass (18 ± 0,05) g and incident heat flux
of (80 ± 2) kW/m
Note 1 to entry: Within the context of this document, the heat transfer index refers to the heat transfer between
a flame and the test specimen. See Annex A.
4 Principle
A horizontally oriented test specimen is restrained from moving and subjected to an incident heat
flux of (80 ± 2) kW/m from the flame of a gas burner placed beneath it. The heat passing through
the specimen is measured by means of a small copper calorimeter on top of and in contact with the
specimen. The time, in seconds, for the temperature in the calorimeter to rise (24 ± 0,2) °C is recorded.
The mean result for three test specimens is calculated as the “heat transfer index (flame)”.
5 Apparatus
5.1 General
The apparatus consists of:
— a Meker gas burner;
— a copper disc calorimeter;
— a specimen support frame;
— a calorimeter location plate;
— a support stand;
— suitable measuring and recording equipment;
— a template.
5.2 Gas burner
A flat topped Meker burner with a perforated top area of (38 ± 2)
...

SLOVENSKI STANDARD
01-marec-2017
Nadomešča:
SIST EN 367:1996
SIST EN 367:1996/AC:2000
Varovalna obleka pred učinki toplote in ognja - Določanje prenosa toplote pri
izpostavljenosti plamenu (ISO 9151:2016, popravljena verzija 2017-03)
Protective clothing against heat and flame - Determination of heat transmission on
exposure to flame (ISO 9151:2016, Corrected version 2017-03)
Schutzkleidung gegen Hitze und Flammen - Bestimmung des Wärmedurchgangs bei
Flammeneinwirkung (ISO 9151:2016, korrigierte Fassung 2017-03)
Vêtements de protection contre la chaleur et les flammes - Détermination de la
transmission de chaleur à l'exposition d'une flamme (ISO 9151:2016, Version corrigée
2017-03)
Ta slovenski standard je istoveten z: EN ISO 9151:2016
ICS:
13.340.10 Varovalna obleka Protective clothing
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 9151
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2016
EUROPÄISCHE NORM
ICS 13.340.10 Supersedes EN 367:1992
English Version
Protective clothing against heat and flame - Determination
of heat transmission on exposure to flame (ISO 9151:2016,
Corrected version 2017-03)
Vêtements de protection contre la chaleur et les Schutzkleidung gegen Hitze und Flammen -
flammes - Détermination de la transmission de chaleur Bestimmung des Wärmedurchgangs bei
à l'exposition d'une flamme (ISO 9151:2016, Version Flammeneinwirkung (ISO 9151:2016, korrigierte
corrigée 2017-03) Fassung 2017-03)
This European Standard was approved by CEN on 6 November 2016.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9151:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 89/686/EEC . 4

European foreword
This document (EN ISO 9151:2016) has been prepared by Technical Committee ISO/TC 94 "Personal
safety - Protective clothing and equipment" in collaboration with Technical Committee CEN/TC 162
“Protective clothing including hand and arm protection and lifejackets” the secretariat of which is held
by DIN.
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 June 2017, and conflicting national standards shall be
withdrawn at the latest by June 2017.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN 367:1992.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this
document.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 9151:2016, Corrected version 2017-03 has been approved by CEN as EN ISO 9151:2016
without any modification.
Annex ZA
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 89/686/EEC
This European Standard has been prepared under a Commission’s standardization request M/031 to
provide one voluntary means of conforming to essential requirements of Directive 89/686/EEC on the
approximation of the laws of the Member States relating to personal protective equipment.
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZA.1 confers, within the limits of
the scope of this standard, a presumption of conformity with the corresponding essential requirements
of that Directive and associated EFTA regulations.
Table ZA.1 — Correspondence between this International Standard and Annex II of the Directive
89/686/EEC Personal Protective Equipment
Clause(s)/subclause(s) of
Essential Requirements of Directive
this International Remarks/Notes
89/686/EEC
Standard
Together with the
3.6, Protection against heat and/or fire Complete Standard requirements in the product
standard
WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European
Standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
INTERNATIONAL ISO
STANDARD 9151
Second edition
2016-11-15
Corrected version
2017-03
Protective clothing against heat
and flame — Determination of heat
transmission on exposure to flame
Vêtements de protection contre la chaleur et les flammes —
Détermination de la transmission de chaleur à l’exposition d’une
flamme
Reference number
ISO 9151:2016(E)
©
ISO 2016
ISO 9151:2016(E)
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2016 – All rights reserved

ISO 9151:2016(E)
Contents Page
Foreword .iv
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 2
5.1 General . 2
5.2 Gas burner . . 2
5.3 Copper disc calorimeter and mounting block . 2
5.4 Specimen support frame . 5
5.5 Calorimeter location plate. 6
5.6 Support stand . 6
5.7 Recorder . 8
5.8 Flat rigid template . 8
6 Precautions . 9
7 Sampling . 9
7.1 Specimen dimensions . 9
7.2 Number of specimens . 9
8 Conditioning and testing atmospheres . 9
8.1 Conditioning atmosphere . 9
8.2 Testing atmosphere. 9
9 Test procedure . 9
9.1 Preparation and calibration . 9
9.1.1 Preliminary procedures . 9
9.1.2 Regulation of the incident heat flux .10
9.2 Test specimen mounting .11
9.3 Test specimen exposure .11
10 Test report (see Annex C) .12
Annex A (informative) Significance of the heat transfer test .13
Annex B (informative) Availability of materials .15
Annex C (informative) Example test report form .17
ISO 9151:2016(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. 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. 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 on 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 the following URL: http:// www .iso .org/ iso/
foreword .html
The committee responsible for this document is ISO/TC 94, Personal safety — Protective clothing and
equipment, Subcommittee SC 13, Protective clothing and by Technical Committee CEN/TC 162, Protective
clothing including hand and arm protection and lifejackets in collaboration.
This second edition cancels and replaces the first edition (ISO 9151:1995), of which Clauses/subclauses
2, 3.3, 5.1, 5.2, 5.3, 5.6, 6, 8.1, 8.2, 9.1.2, 9.3.1, 9.3.2, 10, all figures, and Annexes A and B have been
technically revised. Tolerances have been added to specified dimensions where appropriate. Results of
a recent inter-laboratory trial have been added to Annex A.
To improve reproducibility, the following major modifications have been made from the previous
version of this test method:
a) The percentage minimum purity of the propane used has been provided (see 5.2);
b) Two alternative methods for constructing the calorimeter are described with additional
information on the figures; additional instructions are given for inserting the calorimeter into the
mounting block; and the total mass of the calorimeter and mounting block is specified (see 5.3);
c) Tolerances for the dimensions of machined parts have been added to text and drawings where
required;
d) Control of air movement during testing is specified (see Clause 6);
e) The specified relative humidity and temperature ranges for the conditioning and testing
atmospheres have been changed (see 8.1 and 8.2);
f) Additional procedures for calibration and stabilization of thermocouple temperature, including a
procedure to check on the linearity of the thermocouple output during regulation of the incident
heat flux density, have been added (see 9.1.1 and 9.1.2); and
g) Test report requirements have been revised (see Clause 10).

iv © ISO 2016 – All rights reserved

ISO 9151:2016(E)
This corrected version of ISO 9151:2016 includes the following changes:
— in 5.3, second paragraph, the tolerance’s value has been corrected from “± 002” to “± 0,002”;
— in 9.3.3, second paragraph, the reference to Annex A has been corrected to Annex B.
ISO 9151:2016(E)
Introduction
Heat transmission through clothing is largely determined by its thickness including any air gaps
trapped between adjacent layers. The air gaps can vary considerably in different areas of the same
clothing assembly. The present method provides a grading of materials when tested under standard
test conditions without an air gap.
vi © ISO 2016 – All rights reserved

INTERNATIONAL STANDARD ISO 9151:2016(E)
Protective clothing against heat and flame —
Determination of heat transmission on exposure to flame
1 Scope
This document specifies a method for determining the heat transmission through materials or
material assemblies used in protective clothing. Materials may then be ranked by comparing heat
transfer indices, which provide an indication of the relative heat transmission under the specified test
conditions. The heat transfer index should not be taken as a measure of the protection time given by the
tested materials under actual use conditions.
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 5725-2, Accuracy (trueness and precision) of measurement methods and results — Part 2: Basic method
for the determination of repeatability and reproducibility of a standard measurement method
IEC 60584-1, Thermocouples — Part 1: Reference tables
IEC 60584-3, Thermocouples — Part 3: Extension and compensating cables — Tolerances and
identification systems
3 Terms and definitions
For the purposes of this document, the following definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.1
test specimen
all the layers of fabric or other materials arranged in the order and orientation as used in practice,
including, where applicable, undergarment fabrics
3.2
incident heat flux
Q
amount of energy applied to the exposed face of the specimen, per unit time
Note 1 to entry: The unit is kW/m .
ISO 9151:2016(E)
3.3
heat transfer index
HTI
mean time, t , in whole seconds to achieve a temperature rise of (24 ± 0,2) °C when tested by
m
the method described in this document using a copper disc of mass (18 ± 0,05) g and incident heat flux
of (80 ± 2) kW/m
Note 1 to entry: Within the context of this document, the heat transfer index refers to the heat transfer between
a flame and the test specimen. See Annex A.
4 Principle
A horizontally oriented test specimen is restrained from moving and subjected to an incident heat
flux of (80 ± 2) kW/m from the flame of a gas burner placed beneath it. The heat passing through
the specimen is measured by means of a small copper calorimeter on top of and in contact with the
specimen. The time, in seconds, for the temperature in the calorimeter to rise (24 ± 0,2) °C is recorded.
The mean result for three test specimens is calculated as the “heat transfer index (flame)”.
5 Apparatus
5.1 General
The apparatus consists of:
— a Meker gas burner;
— a copper disc calor
...