Each helmet should have the following four permanent marks:

1. Name, trademark and model of the manufacturer.

2. year and month of manufacture.

3. License number.

4. Inspection mark.

helmets with other properties shall be marked on the hat according to the following provisions:

1. helmets with low temperature resistance in accordance with 2.2.1 shall be marked with low temperature, such as "-2℃" and "-3℃".

2. For the safety helmet meeting the requirements of 2.2.2 on combustion resistance, mark "R" on the helmet.

3. For the safety helmet meeting the requirements of 2.2.3 electrical insulation performance, mark "D" on the helmet.

4. For the safety helmet meeting the requirements of 2.2.4 lateral rigidity, mark "CG" on the helmet.

extended information

2.2.1 low temperature resistance: the impact absorption performance and penetration resistance of helmets below-1℃ shall meet the requirements of paragraphs 2.1.1 and 2.1.2.

2.2.2 flame resistance: burn the safety helmet for 1 seconds with the flame and method specified in GB2812－26 Test Method for Safety Helmets. After removing the flame, the flame of the cap shell should be self-extinguishing within 5 seconds.

2.2.3 electrical insulation performance: AC 12V withstand voltage test for 1 minute, and the leakage current should not exceed 1.2mA.

2.2.4 lateral rigidity: apply a lateral pressure of 43kg to the safety helmet by the method specified in GB2812－26, and the maximum deformation of the cap shell shall not exceed 4mm, and the deformation after unloading shall not exceed 15mm.

Baidu Encyclopedia-Safety helmet standard