GB23394-2024
Respiratory protection—Positive pressure self-contained closed-circuit compressed oxygen breathing apparatus
呼吸防护 正压式自给闭路压缩氧气呼吸器
GB 23394-2024 is a current mandatory Chinese national standard for Respiratory protection—Positive pressure self-contained closed-circuit compressed oxygen breathing apparatus. It appears in the Medical compliance cluster with a product safety focus and has an implementation date of Jan 1, 2026.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to positive pressure self-contained closed-circuit compressed oxygen breathing apparatuses (oxygen breathing apparatuses) used for respiratory protection. It is designed for professionals operating in hazardous environments, including mining and firefighting. It is mandatory for manufacturers producing these specific respiratory protection devices for the Chinese market. The standard does not apply to open-circuit compressed air breathing apparatuses.
Technical requirements
The standard specifies comprehensive technical requirements for the high pressure, medium pressure, and low pressure systems of the apparatus. It mandates a minimum design service life of 8 years for the complete machine. Manufacturers must ensure all materials in contact with the user's skin and breathing gas are harmless to health. The apparatus must function reliably across a wide range of environmental conditions, including temperatures from -20°C to 60°C and atmospheric pressures from 70 kPa to 125 kPa. Key component requirements include stringent criteria for the face mask, which must offer a wide field of vision, high light transmittance, and resistance to high-speed particle impacts. The breathing bag or chamber must possess adequate volume and airtightness. The apparatus must maintain positive pressure during the entire breathing cycle to prevent external contaminants from entering. Additionally, the standard outlines specific performance criteria for the pressure reducer, pressure indicator, and alarm system to ensure reliable oxygen supply and user warning. The standard also addresses the breathing protection performance, setting limits for inhalation resistance, exhalation resistance, and inspired gas temperature. It dictates that the oxygen content in the inhaled gas must not fall below 21%, while carbon dioxide content must be strictly controlled. Apparatuses must also pass rigorous tests for flame retardancy, temperature resistance, and impact adaptability.
Testing methods
The standard outlines various testing methods to verify compliance, including: - Breathing protection performance test: Utilizes a simulated human breathing device to evaluate oxygen and CO2 content, breathing resistance, and inspired gas temperature under different thermal conditions. - Practical performance test: Involves human subjects performing simulated operational tasks (e.g., crawling, climbing, carrying weights) to assess ergonomics and real-world functionality. - Environmental resistance tests: Evaluates the apparatus's durability against temperature extremes, flame retardancy, and impact. - Component-specific tests: Includes airtightness tests for high, medium, and low-pressure systems, as well as strength tests for critical valves and cylinders.
FAQs
What products are regulated under GB 23394-2024?
GB 23394-2024 regulates positive pressure self-contained closed-circuit compressed oxygen breathing apparatuses. These are respiratory protection devices that isolate the user's respiratory system from the ambient environment, using compressed oxygen and absorbing exhaled carbon dioxide.
Are there any updates from the previous version of GB 23394?
Yes, GB 23394-2024 replaces GB 23394-2009. Key updates include new classification criteria based on low-pressure storage structure and cylinder type, added requirements for the overall service life design, and enhanced performance criteria for face masks, such as fog resistance and high-speed particle impact resistance.
Does GB 23394-2024 apply to mining environments?
Yes, the standard includes specific requirements for mining use. For instance, mining oxygen breathing apparatuses must not use aluminum alloy seamless cylinders, and electronic components must meet specific explosion-proof performance standards outlined in GB/T 3836.4.
The summary above provides a high-level overview of GB 23394-2024. To ensure complete compliance for your respiratory protection products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 23394-2024 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Safety
- CCS
- C 73
- ICS
- 13.340.30
- Competent department
- Ministry of Emergency Management
- Technical committee
- National Technical Committee on Personal Protective Equipment of Standardization Administration of China
Relationships
Replaces:GB 23394-2009