Respiratory protective devices - Self-contained open-circuit compressed air breathing apparatus incorporating a hood for escape - Requirements, testing, marking

This standard establishes comprehensive requirements for self-contained open-circuit breathing apparatus equipped with an air cylinder and a full face mask, specifically designed for escape from hazardous environments. The document outlines the necessary performance criteria, safety specifications, and testing methodologies to ensure the equipment provides adequate respiratory protection during emergency evacuation. It details procedures for type testing, performance verification, and marking requirements to guarantee that each unit meets the defined safety levels. The standard addresses critical aspects such as cylinder capacity, air supply duration, flow rates, and the mechanical integrity of the head seal. Compliance with these guidelines ensures that the breathing apparatus functions effectively under emergency conditions, offering reliable protection to users facing toxic or oxygen-deficient atmospheres. By adhering to the specified test protocols, manufacturers can validate that their devices meet the necessary safety standards for escape scenarios. This framework serves as a reference for quality assurance and product evaluation within the field of respiratory protective equipment designed for emergency use.