GB 21976.8-2025 Escape apparatus for building fire—Part 8: Chemical oxygen respiratory protective devices for self-rescue from fire English, Anglais, Englisch, Inglés, えいご
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ICS
CCS H
National Standard of the People's Republic of China
GB 21976.8-2025
Escape apparatus for building fire - Part 8: Chemical oxygen respiratory protective devices for self-rescue from fire
建筑火灾逃生避难器材 第8部分：化学氧消防自救呼吸器
Issue date: 2025-12-31 Implementation date: 2027-01-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
Introduction
1 Scope
2 Normative References
3 Terms and Definitions
4 Models and Specifications
4.1 Models
4.2 Specifications
5 Technical Requirements
5.1 Structural Requirements
5.2 Material Requirements
5.3 Wearing Mass
5.4 Resistance to Environmental Changes and Mechanical Impact
5.5 Protective Performance
5.6 Field of Vision
5.7 Light Transmittance of the Visor
5.8 Hermeticity of Sealed Packaging
5.9 Respiratory System Hermeticity
5.10 Effective Volume of the Breathing Bag
5.11 Connection Strength
5.12 Excess Gas Exhaust Valve
5.13 Personnel Wearing Suitability
6 Test Methods
6.1 General Principles
6.2 Structure and Marking Inspection
6.3 Material Tests
6.4 Determination of Wearing Mass
6.5 Resistance to Environmental Changes and Mechanical Impact Test
6.6 Protective Performance Test
6.7 Field of Vision Test
6.8 Light Transmittance Test for the Visor
6.9 Hermeticity Test for Sealed Packaging
6.10 Respiratory System Hermeticity Test
6.11 Determination of Effective Volume of the Breathing Bag
6.12 Connection Strength Test
6.13 Performance Test for Excess Gas Exhaust Valve
6.14 Personnel Wearing Suitability Test
7 Inspection Rules
7.1 Factory Inspection
7.2 Type Test
8 Marking, Packaging, Transportation, Storage
8.1 Marking
8.2 Packaging
8.3 Transportation
8.4 Storage
Annex A (Normative) Protective Performance Test Apparatus
A.1 Overview
A.2 Requirements
Escape and Refuge Equipment for Building Fires — Part 8: Chemical Oxygen Respiratory Protective Devices for Self-Rescue from Fire
1 Scope
This document defines terms related to chemical oxygen respiratory protective devices for self-rescue from fire, specifies models and specifications, technical requirements, inspection rules, as well as requirements for marking, packaging, transportation, and storage. It also describes corresponding test methods.
This document applies to the design, manufacture, and inspection of chemical oxygen respiratory protective devices for self-rescue from fire (hereinafter referred to as "respirators").
2 Normative References
The following documents contain provisions which, through normative reference in this text, constitute essential provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB 2626 Respiratory Protection — Non-Powered Air-Purifying Particle Respirator
GB 2890 Respiratory Protection — Self-contained Breathing Apparatus
GB/T 10125 Corrosion Tests in Artificial Atmospheres — Salt Spray Tests
GB 21976.7 Escape and Refuge Equipment for Building Fires — Part 7: Filtering Respiratory Protective Devices for Self-Rescue from Fire
GB 24502 Self-Rescuers for Coal Mines
GB/T 32166.2 Personal Protective Equipment — Eye and Face Protection — Occupational Eye and Face Protectors — Part 2: Test Methods
MT/T 427 Technical Conditions for Potassium Superoxide Tablet Oxygen Generators
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
chemical oxygen respiratory protective devices for self-rescue from fire
A respiratory protective appliance that isolates the user's respiratory organs from the ambient atmosphere and provides oxygen generated by a chemical oxygen generator for personnel to escape from fire situations under oxygen-deficient conditions.
3.2
wearing mass
The mass of the chemical oxygen respiratory protective device when in the worn state.
3.3
inhalation resistance
The instantaneous pressure difference between the inhalation port of the test apparatus and the ambient atmosphere during inhalation.
3.4
exhalation resistance
The instantaneous pressure difference between the exhalation port of the test apparatus and the ambient atmosphere during exhalation.
4 Models and Specifications
4.1 Models
The designation of models for chemical oxygen respiratory protective devices shall be according to the following provisions:
Example 1: TZY 15 indicates a chemical oxygen respiratory protective device with a rated protection time of 15 minutes.
Example 2: TZY 15A indicates a chemical oxygen respiratory protective device with a rated protection time of 15 minutes, after its first modification.
4.2 Specifications
Chemical oxygen respiratory protective devices are divided into two specifications based on their rated protection time: 15 minutes and 30 minutes.
5 Technical Requirements
5.1 Structural Requirements
5.1.1 The respirator shall be ready for use immediately upon opening the seal, without requiring any additional actions; once the respirator's seal is opened, this should be immediately recognizable.
5.1.2 The respirator shall consist of a protective hood, facepiece, chemical canister, breathing bag, etc.
5.1.3 The respirator shall have a 360° visible reflective marking positioned at forehead height.
5.1.4 The chemical canister shall be made of metal material, with a thermal insulation layer on its outer wall, and dust filters at the inlet and outlet.
5.2 Material Requirements
5.2.1 Metal Material Requirements
5.2.1.1 Appearance Quality
The surfaces of all metal components of the respirator shall be free from defects such as cracks, wrinkles, and burrs.
5.2.1.2 Salt Spray Corrosion Resistance
After a 48-hour neutral salt spray test, the inner wall of the chemical canister shall show no visible corrosion.
5.2.2 Aging Resistance of Rubber and Plastic Materials
Rubber and plastic materials used in the respirator shall not exhibit significant deformation, damage, adhesion, cracking, hardening, or other abnormalities after high and low temperature tests.
5.2.3 Heat Resistance of Rubber Materials in Constant Contact with the Canister Outer Wall
Rubber materials in constant contact with the outer wall of the chemical canister shall not become sticky or produce irritating odors after the high temperature test.
5.2.4 Flame Retardancy of Exposed Non-Metallic Materials
After the flame retardancy test, exposed non-metallic materials on the respirator shall not melt or burn through. After-flame time shall not exceed 5 seconds, and they shall comply with the provisions of 5.9.
5.2.5 Strength of Sealing Packaging Material
The sealing packaging material shall not show damage after puncture resistance and tear resistance tests.
5.2.6 Requirements for Oxygen Generating Agent
The oxygen generating agent shall comply with the provisions of MT/T 427.
5.3 Wearing Mass
The wearing mass shall not exceed 1800 g.
5.4 Resistance to Environmental Changes and Mechanical Impact
After the environmental change and mechanical impact test, the respirator shall not have cracks, bursts, breakage, or other failures causing damage, and it shall comply with the
