Respiratory protective devices. Classification for respiratory protective device (RPD), excluding RPD for underwater application Ingestion-build-44680 BS EN 54-23 also specifies

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Respiratory protective devices. Classification for respiratory protective device (RPD), excluding RPD for underwater application Ingestion-build-44680 BS EN 54-23 also specifies1 Scope This Technical Specification specifies the classification of Respiratory Protective Devices based on their performance. The performance requirements are given in the relevant performance standards.