Protective helmets. Test methods - Retention system effectiveness Ingestion-build-47182 For hydrocarbon gas mixtures such

For hydrocarbon gas mixtures such as natural gas

(For appliances where the inclination of the guides to the vertical exceeds 15°

050 % in low alloy steels and between 0

in the continuous activated sludge system (see ISO 5667-16)

Power plants

Protective helmets. Test methods - Retention system effectiveness Ingestion-build-47182 For hydrocarbon gas mixtures such1 Scope This European Standard specifies methods of test for protective helmets. The purpose of these tests is to enable assessment of the performance of the helmet as specified in the appropriate helmet standard. This European Standard specifies the method of test for retention system effectiveness.