ISO 11999-5:2024
(Main)PPE for firefighters — Test methods and requirements for PPE used by firefighters who are at risk of exposure to high levels of heat and/or flame while fighting fires occurring in structures — Part 5: Helmets
PPE for firefighters — Test methods and requirements for PPE used by firefighters who are at risk of exposure to high levels of heat and/or flame while fighting fires occurring in structures — Part 5: Helmets
This document specifies the minimum design and performance requirements for helmets as part of personal protective equipment (PPE) to be used by firefighters, primarily but not solely to protect against impact and exposure to flame and high thermal loads.
Équipement de protection individuelle pour pompiers — Méthodes d'essai et exigences pour les équipements de protection individuelle utilisés par les pompiers qui risquent d'être exposés à des niveaux élevés de chaleur et/ou de flamme lorsqu'ils combattent des incendies dans des structures — Partie 5: Casques
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International
Standard
ISO 11999-5
Second edition
PPE for firefighters — Test methods
2024-08
and requirements for PPE used
by firefighters who are at risk of
exposure to high levels of heat
and/or flame while fighting fires
occurring in structures —
Part 5:
Helmets
Équipement de protection individuelle pour pompiers —
Méthodes d'essai et exigences pour les équipements de protection
individuelle utilisés par les pompiers qui risquent d'être exposés
à des niveaux élevés de chaleur et/ou de flamme lorsqu'ils
combattent des incendies dans des structures —
Partie 5: Casques
Reference number
© ISO 2024
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ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Helmet requirements . 2
4.1 General .2
4.1.1 Fit .3
4.1.2 Protrusions and sharp edges .3
4.1.3 Reinforcement .3
4.1.4 Protected area .3
4.1.5 Field of vision.4
4.1.6 Material innocuousness .4
4.1.7 Resistance to cleaning and disinfecting agents .5
4.1.8 Replacement components and accessories .5
4.1.9 Helmet mass .5
4.1.10 Shell conspicuity .5
4.1.11 Retro-reflective material .5
4.1.12 Neck protector and ear covers .5
4.1.13 Shikoro .6
4.2 Samples, helmet adjustment and pre-conditioning .6
4.2.1 Samples .6
4.2.2 Helmet adjustment .6
4.3 Pre-conditioning .6
4.3.1 Thermal shock .6
4.3.2 Water soak .7
4.3.3 “Thermal plus” .7
4.3.4 “Thermal minus” .7
4.3.5 Pre-treatment and pre-conditioning for fabrics .7
4.4 Performance requirements . 12
4.4.1 Requirement table . 12
4.4.2 Mechanical performances . 13
4.4.3 Thermal performances .14
4.4.4 Others .16
4.5 Test methods .17
4.5.1 Force impact resistance .17
4.5.2 Impact energy attenuation (optional) .17
4.5.3 Penetration resistance .18
4.5.4 Lateral crushing .18
4.5.5 Retention system strength .18
4.5.6 Retention system effectiveness .19
4.5.7 Flame resistance .19
4.5.8 Flame engulfment (optional) . 22
4.5.9 Radiant heat resistance . 22
4.5.10 Convective heat resistance . 22
4.5.11 Thermal protective performance for neck protector and/or ear covers or Shikoro . 23
4.5.12 Protection against molten metals . 23
4.5.13 Tests for electrical insulation . 23
4.5.14 Test for resistance to liquid chemical .24
4.5.15 Hardware corrosion resistance .24
4.5.16 Optical properties measurements for oculars . .24
4.5.17 Scratch resistance test to oculars .24
4.5.18 Resistance to fogging test to oculars . 25
4.5.19 High speed particle impact resistance test to oculars . 25
iii
5 Marking . .25
iv
Foreword
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This document was prepared by Technical Committee ISO/TC 94, Personal safety — Protective clothing and
equipment, Subcommittee SC 14, Fire-fighters’ personal equipment.
This second edition cancels and replaces the first edition (ISO 11999-5:2015), which has been technically
revised.
The main changes are as follows:
— the content has been revised with a focus on single performance requirements.
A list of all parts in the ISO 11999 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
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