Basic requirements for hard hat standard technology

The helmet standard refers to the helmet production specification requirements, technical requirements, marking requirements and inspection rules. Generally refers to the latest national standard GB2811-2007. This standard specifies the physical performance requirements, technical performance requirements and inspection rules, management, marking and packaging of helmets used in industry. The following small series introduces you to the technical requirements of the helmet standard.

Basic requirements for hard hat standard technology

Impact absorption performance: use three safety helmets to treat at 50±2°C (40°C under the mine), -10±2°C and water immersion, and then use 5KG steel hammer to drop from 1M height for impact test. The maximum impact force of the head mold should not exceed 500KG.

Penetration resistance: According to the material of the helmet, 50±2°C, -10±2°C and water immersion are used for treatment. Then, the 3KG steel cone is used to test from 1M height. The steel cone should not be used. The head mold is in contact.

A safety helmet is a protective product that protects the head from impact. It consists of a cap shell, a cap liner, a lower cheek band and a rear cuff. The cap is hemispherical, strong, smooth and flexible, and the impact and puncture kinetic energy of the striker is mainly absorbed by the cap. There is a space between the cap and the cap liner to cushion and disperse the instantaneous impact force, thereby avoiding or reducing direct damage to the head. Impact suction performance, puncture resistance, lateral rigidity, electrical insulation, and flame retardancy are requirements for the basic technical performance of the helmet.

Hard hat standard technology other requirements

Low temperature resistance: The impact absorption performance and penetration resistance of helmets below -10 °C are to comply with the requirements of 2.1.1 and 2.1.2.

Combustion resistance: Burn the helmet for 10 seconds with the flame and method specified in GB2812-81 "Safety Cap Test Method". After removing the flame, the shell flame should be self-extinguishing within 5 seconds.

Electrical insulation performance: AC 1200V withstand voltage test for 1 minute, leakage current should not exceed 1.2mA.

Lateral rigidity: The pressure of the helmet should be increased by 43kg in the transverse direction according to the method specified in GB2812-81. The maximum deformation of the cap should not exceed 40mm, and the deformation after unloading should not exceed 15mm.

Article reprint link: Huaqiang Wisdom Network