ISO 11999-5:2015

INTERNATIONAL ISO
STANDARD 11999-5
First edition
2015-11-01
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
Équipement de protection personnelle pour pompiers — Méthodes
d’essai et exigences pour les équipements de protection personnelle
utilisés par les pompiers qui sont à risque d’une exposition à des
niveaux élevés de chaleur et/ou de flamme quand la lutte contre les
incendies survient dans les structures —
Partie 5: Casques
Reference number
©
ISO 2015
© ISO 2015, Published in Switzerland
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ii © ISO 2015 – All rights reserved

Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Helmet requirements . 2
4.1 General . 2
4.1.1 Fit . 2
4.1.2 Protrusions and sharp edges . 2
4.1.3 Reinforcement . 3
4.1.4 Replacement components and accessories . 3
4.1.5 Neck protector and ear covers . 3
4.1.6 Shikoro . . . 3
4.1.7 Optional components . . 3
4.1.8 Material selection . 4
4.1.9 Resistance to cleaning agent . 4
4.1.10 Protected area . 4
4.1.11 Field of vision. 5
4.1.12 Helmet mass . 6
4.2 Samples and helmet adjustment . 6
4.2.1 Samples . 6
4.2.2 Helmet adjustment. 6
4.3 Pre-conditioning .10
4.3.1 Pre-conditioning for Type 1 helmets .10
4.3.2 Pre-conditioning for Type 2 helmets .11
4.4 Performance requirements .12
4.4.1 Requirement table for Type 1 and Type 2 helmets .12
4.4.2 Radiant heat requirements for Type 1 helmets .14
4.4.3 Protection against molten metals for Type 1 helmets (optional) .14
4.4.4 Heat resistance .14
4.4.5 Flame resistance .15
4.4.6 Flame engulfment for Type 1 helmets (optional) .15
4.4.7 Thermal protective performance (TPP) for Type 2 helmets .15
4.4.8 Force impact resistance .16
4.4.9 Ballistic resistance for Type 1 helmets (optional) .16
4.4.10 Impact energy attenuation for Type 2 helmets .16
4.4.11 Penetration resistance .16
4.4.12 Lateral crushing for Type 1 helmets .16
4.4.13 Retention system effectiveness for Type 1 helmet (optional) .16
4.4.14 Retention system strength .17
4.4.15 Suspension system retention for Type 2 helmets .17
4.4.16 Shell retention for Type 2 helmets .17
4.4.17 Electrical properties .17
4.4.18 Hardware corrosion resistance for Type 2 helmets .18
4.5 Test methods .18
4.5.1 Radiant heat .18
4.5.2 Protection against molten metals for Type 1 helmets (optional) .18
4.5.3 Heat resistance .18
4.5.4 Flame resistance .19
4.5.5 Flame engulfment for Type 1 helmets (optional) .19
4.5.6 Thermal protective performance for Type 2 helmets ear covers .20
4.5.7 Force impact resistance .20
4.5.8 Ballistic resistance for Type 1 helmets (optional) .20
4.5.9 Impact energy attenuation for Type 2 helmets .21
4.5.10 Penetration resistance .21
4.5.11 Lateral crushing for Type 1 helmets .21
4.5.12 Retention system effectiveness for Type 1 helmets (optional) .21
4.5.13 Retention system strength .21
4.5.14 Suspension system retention for Type 2 helmets .22
4.5.15 Shell retention for Type 2 helmets .22
4.5.16 Electrical properties .22
4.5.17 Hardware corrosion resistance for Type 2 helmets .23
5 Marking .23
5.1 Marking for Type 1 helmets .23
5.2 Marking for Type 2 helmets .24
iv © ISO 2015 – All rights reserved

Foreword
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electrotechnical standardization.
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The committee responsible for this document is ISO/TC 94, Personal safety — Protective clothing and
equipment, Subcommittee SC 14, Fire-fighters’ personal equipment.
ISO 11999 consists of the following parts, under the general title 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 1: General
— Part 2: Compatibility [Technical Specification]
— Part 3: Clothing
— Part 4: Gloves
— Part 5: Helmets
The following parts are under preparation:
— Part 6: Footwear
— Part 9: Fire hoods
...