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EN 397 specifies both physical and functional requirements. Physical requirements include materials, construction and size. Functional requirements include shock absorption, lateral stiffness and protection against penetration of sharp objects. The chin strap is released at 15-25 kg. This is so that the safety helmet does not cause you to be strangled or injured in falls where it can get stuck. In most cases, a safety helmet is recommended according to EN397 for work at heights.
The chin strap on helmets certified according to EN12492 only releases at a pressure of at least 50 kg. The helmet thus remains in place in case of falls and is suitable in environments such as mountaineering to protect against e.g. falling rocks.
EN 166 is the minimum standard for safety glasses and includes optical class and mechanical strength. It applies to all safety glasses that do not have a specific standard, such as for laser or sun protection. The performance of the glasses according to EN 166 is indicated by a code on the frame, where "EN 166" is followed by numbers and letters indicating the strength of the frame and the optical class. In some cases, there may also be codes for extra protection, but this is not always included.
EN 170 is intended for people who are exposed to UV radiation, which can be harmful both in everyday life and in the workplace. Short-term exposure without goggles can cause temporary effects, similar to sunburn on the eyes. However, prolonged exposure increases the risk of cataracts and other eye diseases. The EN 170 standard ensures that UV filters meet the requirements for protection levels and light transmission, minimizing damage to the eyes. The color of the lenses does not affect the UV protection, but is about visibility. The right fit is also important to provide full coverage around the eyes and protect against UV radiation from all directions.
Standard DIN EN 352 regulates general requirements for hearing protection as part of protective equipment. The choice of hearing protection according to DIN EN 352 depends on the working conditions and noise type. The requirements are divided into the following types: earplugs, earmuffs, helmets with hearing protection and noise protection suits. In addition to the general requirements, product-specific requirements are contained in specific standards.
Earmuffs according to the DIN EN 352-1 standard are defined as hearing protectors that enclose each of the wearer's outer ears with a functional capsule. Because it is often desirable to frequently put on and take off hearing protectors in areas with varying noise exposure, earmuffs are recommended for such environments.