What are the national standards for the use of helmets?
The life of the helmet: calculated from the date of manufacture of the product.Woven sticks of plant sticks, no more than two years.Plastic cap, paper glue cap, not more than two and a half years.Glass steel (vinylon steel) rubber cap is more than three and a half years.
More than to do testing, testing qualified can continue to use, but still after regular inspection, the cycle seems to be a month, if a test failed, then batch batch scrapped.
