EN ISO 13927:2023
(Main)Plastics - Simple heat release test using a conical radiant heater and a thermopile detector (ISO 13927:2023)
Plastics - Simple heat release test using a conical radiant heater and a thermopile detector (ISO 13927:2023)
This document specifies a method suitable for the production control or product development purposes for assessing the heat release rate of essentially flat products exposed in the horizontal orientation to controlled levels of radiant heating with an external igniter. The heat release rate is determined by the use of a thermopile instead of the more accurate oxygen consumption techniques. The time to ignition and sustained flaming are also measured in this test. The mass loss of the test specimen can also be measured optionally.
Kunststoffe - Einfache Prüfung der Wärmefreisetzung unter Anwendung eines kegelförmigen Strahlungsheizkörpers und einer Thermosäule als Detektor (ISO 13927:2023)
Dieses Dokument legt ein Verfahren fest, das im Rahmen der Produktionskontrolle oder der Produktentwicklung zur Beurteilung der Wärmefreisetzungsrate von im Wesentlichen ebenen Produkten geeignet ist, die in horizontaler Ausrichtung kontrollierten Stufen einer Erhitzung durch Strahlung unter Anwendung einer externen Zündvorrichtung ausgesetzt werden. Bei dieser Prüfung wird die Wärmefreisetzungsrate mit Hilfe einer Thermosäule bestimmt und nicht über den Sauerstoffverbrauch, der bei genauer arbeitenden Verfahren ausgewertet wird. Bei dieser Prüfung wird auch die Zeit gemessen, bis eine Entzündung und andauerndes Brennen mit Flamme erfolgen. Wahlweise kann auch der Massenverlust des Probekörpers gemessen werden.
Plastiques - Essai simple pour la détermination du débit calorifique au moyen d'un radiateur conique et d'une sonde à thermopile (ISO 13927:2023)
Le présent document spécifie une méthode adaptée au contrôle de la production ou au développement de produit permettant l’évaluation du débit calorifique de produits essentiellement plats exposés suivant une orientation horizontale à des niveaux contrôlés de chaleur rayonnante, avec un dispositif d’allumage externe. Le débit calorifique est déterminé au moyen d’une thermopile plutôt qu’à l’aide de techniques plus précises de consommation d’oxygène. Le temps d’allumage et la flamme persistante sont aussi mesurés pendant cet essai. La perte de masse de l’éprouvette peut aussi être mesurée de manière facultative.
Polimerni materiali - Preprost preskus za ugotavljanje sproščene toplote z uporabo koničnega radiacijskega grelnika in detektorja iz termoelektrične baterije (ISO 13927:2023)
Ta dokument določa metodo, primerno za nadzor proizvodnje ali razvoj izdelkov za ocenjevanje hitrosti sproščanja toplote za izdelke, ki so v večji meri ploščati in v vodoravnem položaju izpostavljeni radiacijskemu segrevanju z zunanjo vžigalno napravo. Hitrost sproščanja toplote se določi z uporabo termoelektrične baterije namesto natančnejših tehnik porabe kisika. Prav tako se pri tem preskusu izmerita čas do vžiga in gorenje s plamenom. Izbirno se lahko izmeri tudi izguba mase preskušanca.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2023
Polimerni materiali - Preprost preskus za ugotavljanje sproščene toplote z
uporabo koničnega radiacijskega grelnika in detektorja iz termoelektrične baterije
(ISO 13927:2023)
Plastics - Simple heat release test using a conical radiant heater and a thermopile
detector (ISO 13927:2023)
Kunststoffe - Einfache Prüfung der Wärmefreisetzung unter Anwendung eines
kegelförmigen Strahlungsheizkörpers und einer Thermosäule als Detektor (ISO
13927:2023)
Plastiques - Essai simple pour la détermination du débit calorifique au moyen d'un
radiateur conique et d'une sonde à thermopile (ISO 13927:2023)
Ta slovenski standard je istoveten z: EN ISO 13927:2023
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 13927
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2023
EUROPÄISCHE NORM
ICS 83.080.01 Supersedes EN ISO 13927:2015
English Version
Plastics - Simple heat release test using a conical radiant
heater and a thermopile detector (ISO 13927:2023)
Plastiques - Essai simple pour la détermination du Kunststoffe - Einfache Prüfung der Wärmefreisetzung
débit calorifique au moyen d'un radiateur conique et unter Anwendung eines kegelförmigen
d'une sonde à thermopile (ISO 13927:2023) Strahlungsheizkörpers und einer Thermosäule als
Detektor (ISO 13927:2023)
This European Standard was approved by CEN on 21 April 2023.
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, Türkiye 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13927:2023 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 13927:2023) has been prepared by Technical Committee ISO/TC 61 "Plastics"
in collaboration with Technical Committee CEN/TC 249 “Plastics” 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 March 2024, and conflicting national standards shall
be withdrawn at the latest by March 2024.
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.
This document supersedes EN ISO 13927:2015.
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 website.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 13927:2023 has been approved by CEN as EN ISO 13927:2023 without any modification.
INTERNATIONAL ISO
STANDARD 13927
Third edition
2023-08
Plastics — Simple heat release test
using a conical radiant heater and a
thermopile detector
Plastiques — Essai simple pour la détermination du débit calorifique
au moyen d'un radiateur conique et d'une sonde à thermopile
Reference number
ISO 13927:2023(E)
ISO 13927:2023(E)
© ISO 2023
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 13927:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 2
5 Principle . 2
6 Apparatus . 2
6.1 General . 2
6.2 Cone-shaped radiant electrical heater . 4
6.3 Heat flux controller . 4
6.4 Chimney and thermopiles . . 5
6.5 Specimen holder . 5
6.6 Retainer frame . 5
6.7 Fume extraction system. 7
6.8 Ignition circuit . 8
6.9 Ignition timer . 8
6.10 Heat flux meter . 8
6.11 Calibration burner . 8
6.12 Data collection system . . 8
7 Suitability of a product for testing .10
7.1 Surface characteristics . 10
7.2 Asymmetrical products . 10
7.3 Thin materials . 10
7.4 Composite specimens . 10
7.5 Dimensionally unstable materials . 10
7.6 Materials that require testing under compression . 11
8 Specimen construction and preparation .12
8.1 Specimens .12
8.2 Conditioning of specimens .12
8.3 Preparation . 13
8.3.1 Specimen wrapping .13
8.3.2 Specimen preparation .13
8.3.3 Preparing specimens of materials that require testing under compression.13
9 Calibration .14
9.1 Heater calibration . 14
9.2 Thermopile calibration . 14
9.2.1 General . 14
9.2.2 Initial calibration . 14
9.2.3 Daily calibration . . .15
10 Test procedure .15
10.1 General precautions . 15
10.2 Initial preparation .15
10.3 Procedure . 16
11 Precision .16
12 Test report .16
Annex A (normative) Calibration of the heat flux meter .18
Annex B (informative) Guidance notes for operators .19
iii
ISO 13927:2023(E)
Annex C (informative) Guidance on measuring mass loss during testing .20
Annex D (informative) Example of thermopile calibration — Relation of heat release and
thermopile output .21
Annex E (informative) Calculation of effective critical heat flux for ignition .23
Bibliography .24
iv
ISO 13927:2023(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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all
such patent rights.
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 61, Plastics, Subcommittee SC 4, Burning
behaviour, in collaboration with the European Committee for Standardization (CEN) Technical
Committee CEN/TC 249, Plastics, in accordance with the Agreement on technical cooperation between
ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 13927:2015), which has been technically
revised.
The main changes are as follows:
— the normative references have been updated to the latest editions (see Clause 2);
— use of mass flow rate of methane gas corresponding to the net heat of combustion for calibration of
the thermopile has been added in Clause 9;
— a new Annex D giving an example of thermopile calibration has been added and subsequent annex
has been renamed as Annex E.
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.
v
ISO 13927:2023(E)
Introduction
Fire is a complex phenomenon; its behaviour and effects depend upon a number of interrelated factors.
The behaviour of materials and products depends upon the characteristics of the fire, the method of use
of the materials, and the environment in which they are exposed (see also ISO 13943).
A test, such as the one specified in this document, deals only with a simple representation of a particular
aspect of the potential fire situation, typified by a radiant heat source, and it cannot alone provide any
direct guidance on the behaviour or safety in fire (see ISO/TS 3814). A test of this type can, however,
be used for comparative purposes or to ensure the existence of a certain quality of performance (in
this case, heat release from a composite material or an assembly) considered to have a bearing on fire
performance generally. It would be wrong to attach any other meaning to performance in this test. The
attention of all users of this test is drawn to the warning that immediately precedes Clause 10.
vi
INTERNATIONAL STANDARD ISO 13927:2023(E)
Plastics — Simple heat release test using a conical radiant
heater and a thermopile detector
1 Scope
This document specifies a method suitable for the production control or product development purposes
for assessing the heat release rate of essentially flat products exposed in the horizontal orientation to
controlled levels of radiant heating with an external igniter. The heat release rate is determined by the
use of a thermopile instead of the more accurate oxygen consumption techniques. The time to ignition
and sustained flaming are also measured in this test. The mass loss of the test specimen can also be
measured optionally.
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 291, Plastics — Standard atmospheres for conditioning and testing
ISO 5660-1, Reaction-to-fire tests — Heat release, smoke production and mass loss rate — Part 1: Heat
release rate (cone calorimeter method) and smoke production rate (dynamic measurement)
ISO 13943, Fire safety — Vocabulary
ISO 14697, Reaction-to-fire tests — Guidance on the choice of substrates for building and transport products
ISO 14934-3, Fire tests — Calibration and use of heat flux meters — Part 3: Secondary calibration method
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 13943 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
flat surface
surface whose irregularity from a plane does not exceed ±1 mm
3.2
ignition
onset of sustained flaming (3.7)
3.3
material
single substance or uniformly dispersed mixture, for example, metal, stone, timber, concrete, mineral
fibre or polymer
ISO 13927:2023(E)
3.4
orientation
plane in which the exposed face of the test specimen (3.6) is located during testing either vertical or
horizontal face upwards
3.5
product
material (3.3), composite or assembly, about which information is required
3.6
test specimen
representative piece of the product (3.5) which is to be tested together with any substrate or surface
treatment
Note 1 to entry: The test specimen may include an air gap.
3.7
sustained flaming
existence of flame on or over the surface of the test specimen (3.6) for a period of over 10 s
3.8
transitory flaming
existence of flame on or over the surface of the test specimen (3.6) for a period of between 1 s and 10 s
4 Symbols
t time to ignition (onset of sustained flaming), expressed in seconds (s)
ig
′′
q
heat release rate per unit area at 180 s after ignition, expressed in kilowatts (kW/m )
q′′
heat release rate per unit area at 300 s after ignition, expressed in kilowatts (kW/m )
q′′
maximum heat release rate per unit area, expressed in kilowatts (kW/m )
max
5 Principle
The heat release rate is assessed by measurement of the output of a thermopile located in a chimney
situated above a burning test specimen that is subjected to a known heat flux from a conical heater.
The output (in mV) is converted into heat release rate per unit area (in kW/m ) by use of a calibration
graph obtained previously by burning methane gas of known heat of combustion in the same apparatus.
Guidance is given in Annex B. The specimen mass loss rate during the test can also be measured by
continuously recording the specimen load cell output. Guidance is given in Annex C.
6 Apparatus
6.1 General
The test apparatus shall consist essentially of the following components: a cone-shaped radiant
heater, a chimney housing a thermopile, a load cell, a specimen holder, and a fume extraction system. A
schematic representation of the assembly is given in Figure 1. The individual components are described
in this clause.
Intoleranced dimensions are recommended values. Accrual dimensions of apparatus should be close to
the dimensions as much as practicable.
ISO 13927:2023(E)
Dimensions in millimetres
Key
1 thermopile
2 chimney
3 cone heater
4 spark igniter
5 specimen
6 load cell (optional)
Figure 1 — Schematic drawing of apparatus
ISO 13927:2023(E)
6.2 Cone-shaped radiant electrical heater
The active element of the heater shall consist of an electrical heater rod, capable of delivering 5 000 W
at the operating voltage, tightly wound into the shape of a truncated cone (see Figure 2). The heater
shall be encased on the outside with a double-walled, stainless-steel cone filled between the walls
with a refractory blanket of nominal thickness 13 mm and nominal density 100 kg/m . The heat flux
from the heater shall be maintained at a pre-set level by controlling the average temperature of three
thermocouples (type K stainless-steel sheathed thermocouples have provided suitable), symmetrically
disposed and in contact with, but not welded to, the heater element (see Figure 2). 1,0 mm to 1,6 mm
outside diameter sheathed (unearthed) thermocouples with an unexposed hot junction may be used.
The heater shall be capable of producing heat fluxes on the surface of the specimen of up to 75 kW/m .
The heat flux shall be uniform within the central 50 mm × 50 mm area of the exposed specimen surface
to within ±2 % for an irradiance of 50 kW/m .
The cone heater shall be provided with a removable radiation shield to protect immediately the
specimen from heat prior to the start of the test.
6.3 Heat flux controller
The heat flux control system shall maintain the average temperature of the heater element steady to
within ±2 °C.
Dimensions in millimetres
Key
1 inner shell
2 refractory-fibre packing
3 thermocouple
4 outer shell
5 spacer block
6 heating element
Figure 2 — Cross-sectional view through heater
ISO 13927:2023(E)
6.4 Chimney and thermopiles
A circular cross-section chimney 600 mm ± 2 mm long and 115 mm ± 2 mm internal diameter
constructed from 1 mm-thick stainless steel shall be used to house the thermopiles. This shall be fixed
on top of the top-plate of the cone heater. The axis of the chimney shall coincide with the axis of the
cone heater.
Each thermopile shall consist of four 1,6 mm ± 0,2 mm outside diameter type K sheathed thermocouples.
The tips of the thermocouples shall be fixed 17 mm from the centreline of the chimney. The four
thermocouples shall be connected in series and the two ends shall be connected to the data collection
system.
A thermopile shall be housed within the chimney at a height of 550 mm above the cone top-plate and
the chimney penetration points shall be equally distributed about the circumference of the chimney.
Another thermopile shall be housed 275 mm above the cone top-plate and the chimney penetration
points are equally distributed across, about the circumference of the chimney.
The arrangement of the chimney and thermopiles is shown in Figure 1.
Both thermopiles shall be calibrated individually according to Clause 9.
6.5 Specimen holder
The specimen holder is shown in Figure 3.
The specimen holder shall have the shape of a square pan with an opening of (106 ± 1) mm × (106 ± 1) mm
and a depth of 25 mm. The holder shall be constructed from stainless steel with a thickness of
(2,4 ± 0,15) mm. It shall include a handle to facilitate insertion and removal and a mechanism to ensure
central location of the specimen under the heater and proper alignment with the weighing device. The
distance between the bottom surface of the cone heater and the top of the specimen shall be adjusted
to 25 mm, except when testing dimensionally unstable materials, in which case, the distance shall be
adjusted to 60 mm ± 1 mm. All tests shall be conducted with the retainer frame shown in Figure 4.
Details of specimen and specimen holder preparation are given in 8.3.
6.6 Retainer frame
The frame shall be constructed of stainless steel with a thickness of (1,9 ± 0,1) mm in the shape of a
box with an inside dimension of each side (111 ± 1) mm and a height of (54 ± 1) mm. The opening for
the specimen face shall be (94,0 ± 0,5) mm as shown in Figure 4. The retainer frame shall have an
appropriate means to secure it to the specimen holder with a specimen in position.
ISO 13927:2023(E)
Dimensions in millimetres
Figure 3 — Specimen holder
ISO 13927:2023(E)
Dimensions in millimetres
Key
1 tapped holes in four places (M3 or 10 × 32 recommended)
Figure 4 — Retainer frame
6.7 Fume extraction system
The apparatus shall be used under a hood or in a fume cupboard with adequate ventilation to remove
safely combustion products from the laboratory.
ISO 13927:2023(E)
6.8 Ignition circuit
Specimen ignition shall be accomplished by a spark plug powered by a 10 kV transformer or a 10 kV spark
generator capable of continuous sparking. The spark electrodes shall have a gap of 3 mm ± 0,5 mm. If
a transformer is used, it shall be of a type specifically designed for spark ignition use. The transformer
shall have an isolated (unearthed) secondary to minimize interference with the data transmission
lines. The electrode length and location of the spar
...
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