Respiratory protective devices - Fresh air hose breathing apparatus for use with full face mask, half mask or mouthpiece assembly - Requirements, testing, marking

This technical document specifies the essential requirements, test methods, and marking conventions for supplied-air respiratory protective devices intended to be used in conjunction with full face masks, half face masks, or mouth-nose assemblies. It defines the performance criteria necessary to ensure the safety and reliability of such equipment in hazardous atmospheric environments where oxygen levels are insufficient or toxic contaminants are present. The standard outlines detailed procedures for evaluating the integrity of the supply system, the effectiveness of the breathing circuit, and the durability of the interface between the air source and the user's respiratory gear. It covers aspects such as pressure limits, flow rates, and resistance to various stress conditions that equipment might encounter during industrial or emergency use. Furthermore, it establishes the necessary information that must be clearly displayed on the device, including identification codes and usage instructions, to facilitate proper handling and maintenance. These provisions aim to harmonize product specifications across regions, ensuring consistent protection for individuals relying on this life-saving technology. The document serves as a comprehensive reference for manufacturers, regulators, and testing laboratories involved in the development and certification of respiratory safety equipment.