Respiratory protective devices - Self-contained closed- circuit breathing apparatus for escape - Requirements, testing, marking

This document outlines specific technical requirements for self-contained closed-circuit breathing apparatuses designed exclusively for emergency escape. It establishes comprehensive criteria regarding the performance, construction, and functionality of such respiratory protection equipment intended to sustain the user in hazardous environments during evacuation. The text details rigorous testing methodologies employed to verify the integrity of the device under various conditions, ensuring it meets established safety benchmarks. Furthermore, it prescribes precise labeling and marking protocols to facilitate immediate identification and proper usage by personnel in critical situations. The content covers essential components including the air supply system, facepiece, and exhalation mechanisms, ensuring all parts function reliably as a cohesive unit. Guidelines are provided for maintenance and operational limits to guarantee effectiveness throughout the device's service life. This framework serves as a reference for manufacturers and regulatory bodies to maintain consistency in the production and validation of escape breathing devices across different contexts.