EN 397 European Safety Helmet Standard

All Head Protection must be tested to the relevant European Safety standards and must be CE marked. It is more than head knowledge &#; Act now and keep within the law.

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Protection against mechanical impacts to the head safeguards the user against possible consequences such as brain injuries or skull fractures. The standard also includes protection against lateral deformation of the helmet, as well as protecting the wearer from dangerous head injuries.

Industrial safety helmets that comply with standard EN 397 generally meet the following safety requirements: 

All helmets certified according to EN 397 must meet these requirements:

A helmet certified in accordance with EN 397 may meet these requirements; they are, however, not mandatory requirements:

• Shock absorption, vertical
• Very low temperatures (-20'C or -30'C)
• Penetration resistance (against sharp and pointed objects)
• Very high temperatures (+150'C)
• Flame resistance
• Electrical insulation (440 V)
• Chin strap attachment: chin strap releases at minimum 150N and maximum 250N
• Molten metal (MM)
• Lateral deformation

-05-12

Get to know the U.S., European, and Canadian standards for safety helmets

Unsure what kind of safety helmet you need? What hard hats comply with what standard? Where to start? We want to make sure staying compliant is second nature, especially when it comes to keeping your head safe.

There&#;s a lot to know and a lot to pay attention to when it comes to safety helmets, but don&#;t worry &#; we&#;ve done the research for you. In this blog, we&#;ll dig into OSHA, ANSI, EN, and CSA standards.

OSHA standard &#; U.S.

The Occupational Safety and Health Administration (OSHA) mandates specific requirements for head protection in the workplace and instructs that, regardless of industry, it&#;s the employer&#;s job to ensure their workers wear head protection when exposed to risks/hazards.

To help employers follow those regulations, OSHA incorporates standards from the American National Standards Institute (ANSI), which is discussed in the next section.

Here&#;s what you need to know about OSHA&#;s head protection regulations.

Safety helmet standards: OSHA has two standards that regulate safety helmet requirements:

1. 29 CFR .135: Governs safety helmet requirements for general industry workers
2. 29 CFR .100: Refers to head protection requirements for construction, demolition, and renovation workers

Safety helmet requirements: Both standards require workers to wear safety helmets if they are at risk of being struck by falling objects, bumping their heads on fixed objects, or coming in contact with electrical hazards.

OSHA requires selection criteria for head protection that must comply with ANSI/ISEA Z89.1. Simply put &#; a helmet that meets ANSI Z89.1 is OSHA compliant.

ANSI/ISEA Z89.1 standard &#; U.S.

ANSI helps employers follow OSHA regulations. The performance criteria for head protection are provided in ANSI Z89.1 American National Standard for Industrial Head Protection, incorporated in OSHA&#;s 29 CFR .135 and by reference in 29 CFR .6.

ANSI Z89.1 requires four performance tests that must be met in order to assign a safety helmet type and class, which are:

1. Force Transmission
2. Apex Penetration
3. Flammability
4. Electrical Insulation

Safety helmet types: There are two types of protective safety helmets under this classification system that refer to impact/penetration protection:

1. Type 1: Designed to reduce the force of impact resulting from a blow to the top of the head
2. Type 2: Designed to reduce the force of impact resulting from a blow to the top, front, back, and sides of the head

Safety helmet classes: To improve comprehension and usefulness, there are electrical-protective classifications for helmets as follows:

• Class G &#; General helmet: Designed to reduce exposure to low voltage conductors, proof tested at V
• Class E &#; Electrical helmet: Designed to reduce exposure to high voltage conductors, proof tested at 20,000V
• Class C &#; Conductive helmet: Not intended to provide protection against contact with electrical conductors

Operating temperature range:

• Basic temperature applications from -18°C (0°F) to 49°C (120°F) &#; No special marking on the helmet
• Low-temperature applications down to -30°C (-22°F) &#; Labeling on the helmet &#;LT&#;
• High-temperature applications up to 60°C (140°F) &#; Labeling on the helmet &#;HT&#;

Additionally, all safety helmets must feature a hard-outer shell and a lining that absorbs shock and incorporates a headband. Straps should suspend from the shell about 1-1¼ inches.

It is important to know that all safety helmets that adhere to ANSI/ISEA standards should be permanently marked with the manufacturer, the date of manufacture, ANSI designation, the Type and Class designation, and the head size range on the inside of the helmet shell.

For more information, please visit Wei Guang.

If your current safety helmet label is missing or is no longer legible, it is recommended that you replace your safety helmet as soon as possible.

EN standards &#; Europe

EN397: The European standard code of practice (EN 397) provides guidance for manufacturers of safety helmets to ensure that minimum material grades are used. It also establishes the requirements for the testing of safety helmets, as safety helmets must be designed to protect the wearer from falling objects. Such protections safeguard the user against possible consequences such as brain injuries or skull fractures. The standard also includes protection against lateral deformation of the helmet.

The helmet will comprise of two main parts &#; the hard outer protective shell and the inner harness. All helmets certified according to EN 397 must meet these requirements:

• Shock absorption, vertical
• Penetration resistance (against sharp and pointed objects)
• Flame resistance
• Chin strap attachment: chin strap releases at minimum 150N (Newtons) and maximum 250N

Additional specifications are provided for ear muff attachment points and chin strap attachment points.

EN: Standard covers insulating helmets aimed at use on low voltage installations, which must provide protection against electric shocks and prevention of dangerous electric current passing through the head. Requirements include:

• All helmets must also meet the requirements in accordance with EN 397
• Protection against alternating voltage of up to V (AC) or direct voltage up to V (DC)
• Insulating helmets must not contain any conductive parts
• Air vents (if available) must not allow any accidental contact with live parts

EN: Standard covers high-performance industrial helmets, which must provide protection against falling objects and lateral impact along with the resulting damage to the brain, skull, and neck. Requirements include:

• Shock absorption, vertical, and lateral
• Penetration resistance, vertical, and lateral
• Fastening system yield: Chin strap yields at minimum 150N and maximum 250 N
• Fastening system effectiveness: During the shock absorption and penetration test, the helmet must not become detached from the test head
• Flame resistance

EN: Helmets for mountaineers must provide protection against hazards that may occur during activities undertaken by mountaineers. Requirements include:

• Shock absorption, vertical, frontal, lateral, dorsal
• Penetration resistance
• Carrier element (chin strap releases at min. 500N)
• Strength of carrier element: Chin strap may exhibit maximum elongation of 25mm
• Carrier element effectiveness: Helmet must not slide from the head

Read more about EN's standards as they pertain to climbing-style safety helmets in the U.S. here.

CSA Z94.1 standard &#; Canada

The performance criteria for head protection in Canada is provided in the Canadian Standards Association (CSA) Industrial Protective Headwear, Z94.1 which applies to the selection, maintenance, and use of industrial safety helmets in the construction, mining, public utilities, and forestry sectors.

Along with optional tests, such as for reverse orientation, CSA Z94.1 requires six performance tests that must be met in order to assign a safety helmet type and class, which are:

1. Dielectric Strength
2. Impact Attenuation
3. Penetration Resistance
4. Passive Retention (Stability)
5. Shell Flammability
6. Liner Ignition Resistance

Safety helmet types: The CSA Standard (Z94.1) tests for Type 1 and Type 2 safety helmets include dielectric strength, impact attenuation, penetration resistance, passive retention, shell flammability, and liner ignition resistance (typically only Type 2 for lateral impact).

1. Type 1: Crown only headwear &#; Designed for applications where it can be shown that there is no hazard related to lateral impact; reversible headwear should be selected if required
2. Type 2: Crown and lateral headwear &#; Designed for applications where there is potential impact on the crown and lateral areas of the head, where moving objects are present, and when the hazard assessment cannot determine the type

Safety helmet classes: To improve comprehension and usefulness, the following designations refer to impact and penetration protection:

• Class G - General helmet: Headwear is non-conducting and is required to pass the dielectric strength test of 2,200 volts for 1 minute
• Class E - Electrical helmet: Headwear is non-conducting and is required to pass the dielectric strength test of 20,000 volts for 3 minutes
• Class C - Conductive helmet: Headwear does not provide dielectric protection

77. standard &#; MSHA PPE requirements

The Mine Safety and Health Administration (MSHA) is an agency under the Department of Labor that works to prevent illness, injury, and death by promoting safe work practices for U.S. miners.

Like OSHA, the agency&#;s regulatory authority is derived from a specific law, which the agency, in turn, enforces. MSHA carries out provisions of the Federal Mine Safety and Health Act of , as well as administers the Mine Improvement and Emergency Response Act of , which further expanded requirements and sanctions for mines.

Mining safety helmet standards: Regarding protective clothing requirements, MSHA has its own PPE standard under 77., and Section (d) specifies the need for head protection from falling objects and to protect miners against electrical shock or burn.

• Hard hats must meet or exceed the ANSI Z89.1 specifications (mentioned in the previous section)
• If helmets are painted, the paint base must be nonmetallic

Find your safety helmet - HexArmor® can help

Not all ANSI hard hats &#; or safety helmets &#; are created equal. Hard hats are being adapted into the more modern safety helmet that is designed for the ultimate safety head covering, putting an innovative spin on one of the most frequently used forms of PPE.

Up your protection with HexArmor®, and check out our safety helmet series, Ceros®. With innovation and design in mind, we&#;ve reinvented the protection that saves your best asset: your head.

Learn more about our safety helmet technology.

Are you using the right head safety equipment? Let us know if you need help or if you're ready to start a trial - our Solution Specialists are ready to work with you. Call 1-877-MY ARMOR or send us a message.

Browse HexArmor's Ceros® safety helmets

[Blog originally published on June 12, ]

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