EN 397
EN 397 specifies physical and performance requirements of industrial safety helmets. Helmets certified to EN 397 must meet the following requirements:
• Shock absorption
• Resistance to penetration
• Flame resistance
• Chin-strap anchorage – chin-strap releases at minimum 150N and maximum 250N
In accordance with EN 397, an industrial safety helmet may also meet the following optional requirements:
• Very low temperatures (-20 °C or -30 °C)
• Very high temperatures (+150 °C)
• Electrical insulation (440V AC)
• Molten metal (MM)
• Lateral deformation (LD)