ISO 16073-5:2019

Overview

ISO 16073-5:2019 specifies minimum performance requirements and test methods for helmets used in wildland firefighting. Part of the ISO 16073 series, this standard focuses on helmet design, materials and laboratory tests that demonstrate suitability for long-duration, high-heat, outdoor wildland firefighting tasks. It is explicitly not intended to provide protection during fire entrapment, nor does it cover structural firefighting, CBRN hazards, or helmets requiring a reflective outer surface.

Key topics and technical requirements

The standard defines both design features and performance tests. Key technical topics include:

• Design and general requirements

  • Helmet shell design, vertical and horizontal clearances, wearing height and mass limits
  • Shell conspicuity and optional retroreflective material
  • Neck protectors, retention systems and permitted helmet accessories

• Performance requirements and tests

  • Shock absorption (crown and off-crown impacts)
  • Resistance to penetration
  • Retention system strength
  • Lateral rigidity
  • Flame resistance and high-temperature stability
  • Behavior in high radiant heat environments
  • Electrical insulation
  • Optional low-temperature tests

• Test procedures and conditioning

  • Sample selection and conditioning (preconditioning chamber, low/high temperature, wet)
  • Use of standardized headforms (e.g., EN 960) and detailed test apparatus/procedures
  • Marking, labelling, and manufacturer information requirements

Practical applications - who uses ISO 16073-5:2019

This standard is essential for:

• Helmet manufacturers and designers developing wildland firefighting head protection to meet recognized performance criteria
• Testing laboratories conducting certification and type testing for PPE helmets
• Procurement officers and safety managers who specify compliant helmets for wildland firefighter teams
• Regulators and accreditation bodies establishing equipment acceptance criteria
• Fire services and safety officers performing risk assessments and selecting appropriate PPE

Using ISO 16073-5 helps ensure helmets balance lightweight design (for extended wear and reduced heat stress) with core protective functions required in wildland operations.

Related standards

• ISO 16073 series (other parts addressing clothing, gloves, etc.)
• ISO 13688 (protective clothing - general requirements)
• ISO 15025 (protection against flame - limited flame spread)
• EN 960 (headforms for helmet testing)
• ISO 15538 (helmets requiring reflective outer surfaces) - consult for reflective-surface requirements

Benefits: compliance with ISO 16073-5 provides a clear technical baseline for design, testing and procurement of wildland firefighting helmets, improving wearer safety and operational consistency.