Q: The service life of plastic safety helmet is generally two and a half years, right? A: Generally speaking, the life expectancy of a plastic safety helmet is 3 years, the two and a half years is not correct, the life expectancy of a fibreglass safety helmet is only two and a half years (2.5 years) and the life expectancy of an aluminium alloy safety helmet is 2 years. Plastic Safety Helmet A safety helmet is an important piece of protective equipment used to protect the head from impact or puncture. It is widely used in numerous industries, including construction, mining, and power. The service life is the effective time that a helmet can maintain its protective properties under normal conditions of use. Safety helmets made of different materials have different service life, generally speaking, the following rules apply: plastic safety helmets have a service life of 3 years, FRP safety helmets have a service life of 2.5 years, and aluminium alloy safety helmets have a service life of 2 years. However, the service life of a safety helmet is not only related to the material, but also affected by many factors, such as the usage environment and frequency. Therefore, the performance and appearance of safety helmets need to be checked regularly to ensure that they continue to provide effective protection. Once a helmet is cracked, deformed, broken or faded in colour, it should be replaced in a timely manner. It is also vital that the helmet is worn correctly. Ensure that they are worn in accordance with the regulations, while avoiding exposing the helmet to harmful environments such as high temperatures, bright lights or chemicals to prevent damage or degradation of its performance. As helmets are essential equipment for ensuring the safety of staff, it is the duty and responsibility of every staff member to understand and comply with their expiry dates. Only in this way can we effectively reduce the incidence of accidents in the workplace and improve the efficiency and quality of work. Protecting the safety of the head is an important task that must be approached with seriousness and responsibility.