BS EN 405:1993 Respiratory protective devices. Valved filtering half masks to protect against gases or gases and particles
Withdrawn
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This European Standard specifies the performance requirements, test methods and marking requirements for valved filtering half masks incorporating either gas or combined filters as respiratory protective devices except for escape purposes. It does not cover gas filtering half masks which do not have valves or are fitted only with exhalation valves. It does not cover devices designed for use in circumstances where there is or might be an oxygen deficiency (oxygen less than17% by volume). Laboratory and practical performance tests are included for the assessment of compliance with the requirements.
This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 132, Respiratory protective devices; Definitions. EN 136, Respiratory protective devices; Full face masks; Requirements, testing, marking. EN 140, Respiratory protective devices; Half masks and quarter masks; Requirements, testing, marking. EN 141, Respiratory protective devices; Gas filters and combined filters; Requirements, testing, marking. EN 143, Respiratory protective devices; Particle filters; Requirements, testing, marking. EN 149, Respiratory protective devices; Filtering half masks to protect against particles; Requirements, testing, marking.
