Respiratory protective devices - Filtering half masks to protect against particles - Requirements, testing, marking

This document outlines the technical requirements, testing procedures, and marking specifications for filtering half-face masks designed to protect against particulate matter. The standard establishes performance criteria for respirators that cover only the nose and mouth, utilizing an exhalation valve or a non-valved design to reduce breathing resistance. It defines specific classification categories based on filtering efficiency levels and ensures the equipment meets stringent safety benchmarks. All aspects of the product's design and construction are evaluated to verify effective filtration of airborne particles while maintaining adequate airflow. The standard includes detailed methodologies for assessing leakage, breathing resistance, and structural integrity under simulated usage conditions. Manufacturers must adhere to these guidelines to ensure product compliance and user safety in environments where exposure to hazardous dust, mist, or smoke is present. Proper labeling requirements ensure end-users are informed about the mask's capabilities and limitations.