ISO 22899-1:2021

INTERNATIONAL ISO
STANDARD 22899-1
Second edition
2021-06
Determination of the resistance to
jet fires of passive fire protection
materials —
Part 1:
General requirements
Détermination de la résistance aux feux propulsés des matériaux de
protection passive contre l'incendie —
Partie 1: Exigences générales
Reference number
©
ISO 2021
© ISO 2021
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ii © ISO 2021 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 3
5 Test configurations . 3
5.1 General . 3
5.2 Internal configuration . 4
5.3 External configuration . 5
6 Construction of the test items and substrates . 5
6.1 General . 5
6.2 Material . 5
6.3 Nozzle. 5
6.4 Flame re-circulation chamber. 6
6.5 Protective chamber . 7
6.6 Panel test specimens (internal configuration) . 9
6.7 Structural steelwork test specimens (internal configuration) .10
6.8 Tubular section test specimens (external configuration) .13
7 Passive fire protection systems .14
7.1 General .14
7.2 Panel test specimens .14
7.3 Structural steelwork test specimens .15
7.4 Tubular section test specimens .15
7.5 Assembly specimens .16
7.5.1 General.16
7.5.2 Requirements for assemblies mounted on panels . .16
7.5.3 Cable transit systems .17
7.6 Pipe penetration systems .18
8 Instrumentation .21
8.1 General .21
8.2 Panel test specimens .21
8.3 Structural steelwork test specimens .22
8.4 Tubular section test specimens .23
8.5 Assembly specimens .24
8.5.1 General.24
8.5.2 Panel mounted cable transit systems .24
8.5.3 Tubular section mounted assemblies .25
8.6 Recommended instrumentation of pipe penetration seals .26
9 Test apparatus and conditions .27
9.1 Nozzle geometry and position .27
9.1.1 General.27
9.1.2 Nozzle position for panel (including panel assemblies) and steelwork tests .27
9.1.3 Nozzle position for tubular section (including assemblies) tests .28
9.2 Fuel .29
9.3 Test environment .29
10 Test procedure .29
11 Repeatability and reproducibility .33
12 Uncertainty of measurement .33
13 Test report .33
14 Practical application of test results .35
14.1 General .35
14.2 Performance criteria .35
14.2.1 General.35
14.2.2 Coatings and spray-applied materials .35
14.2.3 Systems and assemblies .36
14.3 Factors affecting the validity of the test .36
14.3.1 General.36
14.3.2 Interruption of the jet fire .36
14.3.3 Failure of thermocouples . .36
14.3.4 Failure of the re-circulation chamber connection .37
Annex A (normative) Methods of fixing thermocouples .38
Annex B (informative) Example test report .40
Bibliography .43
iv © ISO 2021 – All rights reserved

Foreword
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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
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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 convenien
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