NS EN 405 : 2001 + A1 2009现行
RESPIRATORY PROTECTIVE DEVICES - VALVED FILTERING HALF MASKS TO PROTECT AGAINST GASES OR GASES AND PARTICLES - REQUIREMENTS, TESTING, MARKING
出版：Norwegian Standards (Norges Standardiseringsforbund)
专家解读视频
Specifies the performance requirements, marking requirements and test methods for valved filtering half masks incorporating either gas or combined filters as respiratory protective devices except for escape purposes. Does not cover gas filtering half masks which do not have valves or are fitted only with exhalation valves. Does not cover devices that are meant to be used when there might be a deficiency of oxygen (less than 17% by volume of oxygen). Coverage includes definitions and classification, testing and marking. Includes tables and diagrams.
