Types of helmets according to working criteria

 

Safety helmets are crucial for protecting workers from a variety of industrial hazards. The correct choice depends on your specific environment, balancing the required protection with safety standards and practical needs. Below is a guide to the main types of safety helmets and how to select them.

By Electrical Protection (Classes)

In North America and under ISO standards, helmets are grouped by their electrical insulation capabilities:

• Class G (General): Rated for low-voltage protection up to 2,200 volts. It's a common choice for general construction and trades where contact with low-voltage conductors is a possibility.

• Class E (Electrical): Designed for high-voltage environments, tested up to 20,000 volts. A mainstay for utility workers, electricians, and others facing serious electrical risks.

• Class C (Conductive): Provides no electrical protection. It is typically lightweight, often vented, and used in environments like mining or vehicle repair where shock hazards are absent.

By Impact Protection (Types)

Standards define how a helmet protects from physical blows:

• Type I: Tested to protect primarily the top of the head from falling objects and is widely used in many industries.

• Type II: Certified to protect the top and sides of the head, providing protection against multi-directional impacts from slips, trips, or swinging objects. It's the standard for high-risk sectors like scaffolding, mining and oil & gas.

 By Design & Application Features

Specialized designs offer fit-specific protection:

• Full Brim vs. Cap Style: A full brim offers better sun and rain protection, while a cap style (with a shorter front bill) is more compact for tight spaces.

• Vented vs. Non-Vented: Vented helmets improve airflow for comfort in hot environments but often compromise electrical safety. Non-vented models are required for electrical work and protection against splashes and falling debris.

• Bump Caps: These only protect against minor bumps from stationary objects like pipes. They are not a substitute for a hard hat against falling or flying objects.

• Mining Helmets: Typically include integrated lamp brackets and cable loops for accessories.

 By Material Construction

The shell material is key to a helmet's performance and longevity:

• High-Density Polyethylene (HDPE): Affordable and durable for general industrial use.

• Acrylonitrile Butadiene Styrene (ABS): Common, value-driven and impact-resistant.

• Polycarbonate (PC): Lightweight and nearly unbreakable, offering excellent impact protection.

• Fiberglass: Offers high strength, excellent heat resistance (up to ~200°C) and strong chemical/acid resistance for harsh environments.

 By Color Coding (Quick Role Identification)

While unofficial standards vary by company, these colors provide a quick visual guide:

• White: Managers, engineers, and supervisors.

• Yellow: General laborers and heavy equipment operators.

• Blue: Electricians and technical staff.

• Green: Safety inspectors and first aiders.

• Red: Firefighters and emergency response personnel.

By Compliance Standards

Ensure your helmet meets your region's mandatory safety standards:

• ANSI/ISEA Z89.1 (USA): Defines Type I/II and Class G/E/C.

• EN 397 (Europe): Defines Type 1 (vertical impacts) and Type 2 (vertical and lateral impacts).

• CSA Z94.1 (Canada): Uses Type 1/2 and Class G/E/C classifications.

• ISO 3873 (International): A global standard covering physical and performance requirements.

 Specialized & Advanced Helmets

Modern helmets are designed for specific scenarios:

• High-Heat Helmets: Made from fiberglass to maintain integrity near sources like furnaces.

• Short Brim Helmets: Improve upward visibility for welders when paired with their face shields.

• Mountaineering-Style Helmets: Now being adapted for work at height, offering chin straps for security among scaffolding or towers.

How to Select the Right Helmet

When choosing a safety helmet, consider your specific work environment:

1. Identify Hazards: Assess key risks like falling objects (Type II for side impacts), electrical exposure (Classes E/G) or heat stress.

2. Check for Certification: Quickly look for compliance marks (ANSI, EN, ISO) inside the shell.

3. Test Fit and Comfort: A helmet must be properly adjusted. Ensure compatibility with other PPE like earmuffs and face shields.

4. Consider Visibility: Choose highly visible colors (e.g. yellow) or add reflective tape for low-light conditions.