ISO 16073-5:2019

INTERNATIONAL ISO
STANDARD 16073-5
First edition
2019-12
Wildland firefighting personal
protective equipment —
Requirements and test methods —
Part 5:
Helmets
Équipement de protection individuelle pour la lutte contre les feux
d'espaces naturels — Exigences et méthodes d'essai —
Partie 5: Casques
Reference number
©
ISO 2019
© ISO 2019
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Published in Switzerland
ii © ISO 2019 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Design and general requirements . 2
4.1 General . 2
4.2 Helmet shell . 2
4.3 Vertical clearance . 2
4.4 Horizontal clearance . 2
4.5 Wearing height . 2
4.6 Mass . 2
4.7 Shell conspicuity . 2
4.8 Retroreflective material . 3
4.9 Neck protector . 3
4.10 Retention system . 3
4.11 Accessories attached on the helmet . 3
5 Performance requirements . 4
5.1 Shock absorption . 4
5.1.1 Crown impact . . 4
5.1.2 Off-crown impacts . 4
5.2 Resistance to penetration . 4
5.3 Retention system strength . 4
5.4 Lateral rigidity . 4
5.5 Flame resistance . 4
5.6 High-temperature stability . 4
5.7 High radiant heat environments . 4
5.8 Electrical insulation . 5
5.9 Optional low-temperature tests . 5
6 Test requirements . 6
6.1 Samples . 6
6.2 Conditioning for testing . 6
6.2.1 Preconditioning chamber . 6
6.2.2 Preconditioning . 6
6.2.3 Low temperature conditioning. 7
6.2.4 High temperature conditioning. 7
6.2.5 Wet conditioning . 7
6.3 Headforms . 7
6.3.1 Construction . 7
6.3.2 Selection of size . . 7
6.3.3 Measurement of clearances and wearing height. 7
6.4 Shock absorption test . 8
6.4.1 Principle . 8
6.4.2 Apparatus . 9
6.4.3 Test procedures.10
6.5 Penetration resistance test .10
6.5.1 Apparatus .10
6.5.2 Test procedure .11
6.6 Retention system strength test .11
6.6.1 Principle .11
6.6.2 Apparatus .11
6.6.3 Procedure .12
6.7 Lateral rigidity test .13
6.8 Flame resistance test .13
6.8.1 General.13
6.8.2 Apparatus .13
6.8.3 Test procedure .13
6.9 Electrical insulation test .13
7 Marking and labelling .14
7.1 General marking requirements .14
7.2 Label durability and legibility .14
7.3 Compliance marking requirements .14
8 Manufacturer’s information .15
Annex A (normative) Conditioning and testing schedule .17
Annex B (informative) Guidelines for personal protective equipment (helmet) design .18
Annex C (normative) Thermal stability of helmets at elevated temperatures .19
Annex D (informative) Recommendations for the materials and construction of helmets .21
Bibliography .22
iv © ISO 2019 – All rights reserved

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
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