ISO 13927:2023

Plastics — Simple heat release test using a conical radiant heater and a thermopile detector

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.

Plastiques — Essai simple pour la détermination du débit calorifique au moyen d'un radiateur conique et d'une sonde à thermopile

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.

General Information

• Status: Published
• Publication Date: 30-Aug-2023
• ICS: 83.080.01 - Plastics in general
• Technical Committee: ISO/TC 61/SC 4 - Burning behaviour
• Drafting Committee: ISO/TC 61/SC 4 - Burning behaviour
• Current Stage: 6060 - International Standard published
• Start Date: 31-Aug-2023
• Due Date: 21-Sep-2023
• Completion Date: 31-Aug-2023

Relations

• Revises: ISO 13927:2015 - Plastics — Simple heat release test using a conical radiant heater and a thermopile detector
• Effective Date: 06-Jun-2022

Standards Content (Sample)

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 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii
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
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
Foreword
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described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
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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
Introduction
...