Skip to content 
When selecting industrial safety helmets, buyers often encounter standards such as EN 397, EN 50365, and EN 12492. Understanding what each standard actually covers is important because a helmet that looks suitable may not provide the protection required for a specific workplace.
Among these standards, EN 397 is one of the most widely used references for industrial safety helmets in Europe. It establishes basic performance and testing requirements for helmets designed to protect workers against common hazards such as falling objects.
For PPE buyers, distributors, and safety managers, understanding EN 397 can make product selection, specification review, and compliance checks much easier.
What Is EN 397?
EN 397 is the European standard for industrial protective helmets. It specifies requirements and test methods for helmets intended primarily to protect the wearer against mechanical hazards, particularly falling objects and the resulting head injuries.
A typical EN 397 safety helmet is designed for applications such as:
- Construction
- Manufacturing
- Warehousing and logistics
- Infrastructure projects
- General industrial work
- Maintenance operations
- Utilities and facility management
However, EN 397 should not automatically be treated as a universal standard for every type of head protection. Certain workplaces require additional protection against electrical, thermal, lateral-impact, or other specialized hazards.
What Does an EN 397 Helmet Protect Against?
The primary purpose of an EN 397 helmet is to reduce the risk of serious head injury caused by mechanical hazards.
A compliant helmet typically provides protection against:
1. Falling Objects
The helmet shell and suspension system are tested to assess their ability to protect the head from impacts caused by objects falling from above.
This makes EN 397 helmets particularly relevant to construction sites, industrial facilities, workshops, and maintenance environments.
2. Penetration
The helmet is also tested against penetration hazards. The design must provide an appropriate level of resistance to an object attempting to penetrate the helmet shell.
3. Flame Exposure
EN 397 includes a mandatory requirement related to resistance to flame exposure. This does not mean that every EN 397 helmet is designed for high-temperature or flash-fire environments.
For specialized thermal hazards, additional standards and certifications may be necessary.
Mandatory Requirements vs Optional Requirements
One important point for PPE purchasers is that not every EN 397 helmet has exactly the same additional features.
The standard contains mandatory requirements as well as optional performance requirements.
Depending on the helmet specification, optional properties may include:
- Very low temperature resistance
- Very high temperature resistance
- Lateral deformation resistance
- Molten metal splash resistance
Therefore, simply seeing “EN 397” on a product specification is not enough when purchasing helmets for specialized working environments.
Buyers should check which optional requirements have actually been tested and certified for the specific helmet model.
EN 397 Markings: What Should You Look For?
Helmet markings can provide useful information when checking a product.
Depending on the product and certification arrangement, markings may identify information such as:
- Applicable standard
- Manufacturer or brand identification
- Helmet model or type
- Size range
- Manufacturing date or batch information
- Relevant optional performance requirements
For procurement teams, it is good practice to verify the marking against the manufacturer’s technical documentation rather than relying solely on product photographs.
EN 397 vs EN 12492: Which Helmet Do You Need?
EN 397 and EN 12492 are sometimes confused because both relate to protective helmets.
The key difference is the intended application and testing approach.
EN 397 is primarily associated with industrial safety helmets and protection against hazards such as falling objects.
EN 12492 applies to helmets intended for mountaineers and similar activities, including applications involving climbing and work at height where different impact and retention considerations may apply.
For a conventional construction or industrial site, EN 397 may be the appropriate starting point. For rope access, climbing, or certain work-at-height applications, a helmet certified to the relevant specialized standard may be more appropriate.
The correct choice should always be based on the actual hazard assessment.
EN 397 vs EN 50365 for Electrical Work
Electrical workers need to pay particular attention to helmet specifications.
A standard EN 397 helmet should not automatically be considered an electrical-insulating helmet simply because it is made from plastic.
For electrical applications, buyers may need helmets meeting the requirements of EN 50365, depending on the voltage and work environment.
This distinction is especially important for:
- Electrical maintenance
- Power distribution
- Utility work
- Electrical construction
- Infrastructure maintenance
When electrical protection is required, check the helmet’s electrical properties and relevant certification instead of assuming that EN 397 alone provides sufficient protection.
How to Choose the Right EN 397 Helmet
Choosing a compliant helmet is only the first step. The helmet should also match the working environment.
Consider the Main Hazards
Start with a workplace risk assessment.
Ask:
- Is there a risk of falling objects?
- Is penetration a concern?
- Could the helmet be exposed to extreme temperatures?
- Is lateral deformation protection required?
- Is there a molten metal splash hazard?
- Are electrical hazards present?
- Is the worker climbing or performing rope-access work?
The answers determine whether a basic EN 397 helmet is sufficient or whether additional protection is required.
Check the Suspension System
The suspension system plays an important role in helmet fit and impact management.
Common features include:
- Adjustable headbands
- Textile suspension systems
- Plastic suspension systems
- Ratchet adjustment
- Chin straps
- Sweatbands
- Replaceable components
For workers wearing helmets for long periods, adjustment and comfort can significantly affect whether the helmet is worn correctly throughout the working day.
Consider Accessories
Modern industrial helmets may support accessories such as:
- Face shields
- Safety spectacles
- Hearing protection
- Neck protectors
- Winter liners
- Headlamps
- Chin straps
However, accessories should be compatible with the helmet and should not compromise its protective performance.
Why Helmet Fit Matters
Even a properly certified helmet cannot provide its intended protection if it does not fit correctly.
A helmet that is too loose may move during an impact. A helmet that is incorrectly adjusted may also become uncomfortable, increasing the likelihood that workers will wear it improperly.
A good industrial helmet should provide:
Secure fit + stable positioning + comfortable adjustment
For employers and PPE distributors, these factors are worth considering alongside certification and price.
When Should an EN 397 Helmet Be Replaced?
Safety helmets should be inspected regularly for signs of damage or deterioration.
Look for:
- Cracks
- Deformation
- Deep scratches
- Brittle or damaged shell material
- Damaged suspension components
- Broken adjustment mechanisms
- Signs of chemical exposure
- Excessive UV or environmental degradation
A helmet should also be replaced after a significant impact if the manufacturer’s instructions require replacement, even when visible damage is not obvious.
The manufacturer’s recommended service life and inspection instructions should always be followed.
Common EN 397 Purchasing Mistakes
Mistake 1: Looking Only at the Standard Number
“EN 397” does not tell you every performance characteristic of a helmet.
Check the complete certification and technical specification.
Mistake 2: Assuming EN 397 Means Electrical Protection
It does not automatically mean that the helmet is suitable for electrical hazards.
For electrical applications, verify the relevant electrical-insulation requirements.
Mistake 3: Choosing Only by Price
A lower purchase price does not necessarily mean a lower total cost.
Durability, replacement parts, adjustment systems, compatibility with accessories, and worker acceptance can all affect the overall value of a helmet.
Mistake 4: Ignoring Compatibility
Adding a face shield, earmuffs, chin strap, or other accessory can affect the overall helmet system.
Make sure accessories are approved or recommended for use with the selected helmet.
EN 397 Safety Helmet Buyer Checklist
Before purchasing industrial safety helmets, buyers can review the following points:
- Standard: Is EN 397 applicable to the intended workplace?
- Certification: Is the helmet properly certified and documented?
- Hazards: Does it address the identified workplace risks?
- Optional requirements: Are additional properties required?
- Electrical protection: Is electrical insulation needed?
- Fit: Does the size range accommodate the intended users?
- Adjustment: Is the suspension easy to adjust?
- Accessories: Are required accessories compatible?
- Maintenance: Are replacement suspension systems and parts available?
- Documentation: Can the supplier provide technical specifications and compliance documents?
Final Thoughts
EN 397 provides an important foundation for selecting industrial safety helmets, particularly where workers face the risk of falling objects and related mechanical hazards.
But EN 397 should be viewed as a starting point rather than the complete purchasing specification.
The best helmet is not simply the one carrying the right standard number. It is the helmet whose protection, fit, accessories, and performance characteristics match the actual risks of the workplace.
For PPE distributors, contractors, and procurement teams, understanding the difference between mandatory and optional EN 397 requirements can help avoid unsuitable purchases and improve overall worker protection.
At CHEAMY, we believe safety equipment should combine reliable protection with everyday comfort. When selecting industrial safety helmets, we recommend evaluating compliance, workplace hazards, fit, compatibility, and long-term usability together—not simply comparing prices.
Safety Meets Comfort.
