GB 16556-2025 Respiratory protection—Self-contained open-circuit compressed air breathing apparatus
ICS13.340.30
CCSC73
National Standard of the People's Republic of China
GB16556-2025
Replaces GB/T16556-2007
Respiratory protection—Self-contained open-circuit compressed air breathing apparatus
Released on August 29, 2025 Implementation on September 1, 2026
State Administration for Market Regulation, National Standardization Administration
Contents
Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Classification and Labeling
5 Technical Requirements
6 Test methods
7 Labelling, packaging and information provided by the manufacturer
Appendix A (Normative) Flame Engulfment Test Method
References
Respiratory protection—Self-contained open-circuit compressed air breathing apparatus
1 Scope
This document specifies the technical requirements, labeling, packaging and manufacturer information for self-contained open-circuit compressed air breathing apparatus, and gives the classification and markings, describing the corresponding test methods.
This document applies to self-contained open-circuit compressed air breathing apparatus for industrial and emergency use (hereinafter referred to as air breathing
apparatus). This document does not apply to closed-circuit breathing apparatus, diving breathing apparatus, escape air breathing apparatus and negative pressure air breathing apparatus.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references. For dated references, only the version corresponding to that date applies to this document. For undated references, the latest version (including all amendments) applies to this document.
GB/T1226 General pressure gauge
GB2626-2019 Respiratory protection self-priming filter type anti-particulate respirator GB2890-2022 Respiratory protection self-priming filter type gas mask GB/T3836.1 Explosive atmospheres Part 1: General requirements for equipment
GB/T3836.4 Explosive atmospheres Part 4: Equipment protected by intrinsic safety type "i"
GB/T4208—2017 Degrees of protection provided by enclosures (IP code)
GB/T5099.1 Seamless Steel Gas Cylinders Part 1: Steel Cylinders with a Tensile Strength of Less than 1100 MPa After Quenching and Tempering
GB/T5099.3 Seamless Steel Gas Cylinders Part 3: Normalized Steel Cylinders GB/T5099.4 Seamless Steel Gas Cylinders Part 4: Stainless Steel Seamless Gas Cylinders
GB/T7307—2001 55° Non-Sealing Pipe Thread
GB/T12903 Terminology of Personal Protective Equipment
GB14866—2023 General Technical Specification for Eye and Face Protective Equipment GB/T23465—2009 Practical Performance Evaluation of Respiratory Protective Equipment
GB/T28053 Aluminum Alloy Liner Carbon Fiber Fully Wrapped Gas Cylinders
GB31975 Technical Requirements for Respiratory Protection of Compressed Air
GB/T32166.2—2015 Personal protective equipment Eye and face protection Occupational eye and face protection Part 2: Measurement methods
GB/T34527 Technical requirements for cylinder valves for air breathing apparatus
3 Terms and Definitions
The terms and definitions defined in GB/T 12903 and the following apply to this document.
3.1
Self-contained open-circuit compressed air breathing apparatus uses the mask to fit closely around the wearer's face, isolating the wearer's respiratory organs, eyes and face from the outside toxic and harmful air or oxygen-deficient environment.
A type of respirator that is completely isolated and requires the personnel to carry their own clean compressed air as the breathing air source, and the exhaled gas is directly discharged into the ambient air.
3.2
Emergency air breathing apparatus self-contained open-circuit compressed air breathing apparatus for fire-fighting andemergencyservices A self-contained
open-circuit compressed air breathing apparatus used by workers undertaking emergency tasks such as firefighting, hazardous chemicals disposal, and rescue.
3.3
Industrial air respirator self-contained open-circuit compressed air breathing apparatus for industrial services In addition to the emergency air respirator applicable areas, mining, petrochemical, industry and trade, smelting, transportation, municipal construction, public utilities and other
A self-contained open-circuit compressed air respirator used by workers in various industries.
3.4
Static pressure is the pressure inside the mask
cavity when the air circuit of the air respirator is balanced after the positive pressure device of the air supply valve is opened.
4 Classification and labeling
4.1 Classification
4.1.1 Classification by applicable occasions
According to their applicable occasions, air respirators are divided into: a) industrial air respirators, marking code: GY; b) emergency air respirators, marking code: YJ.
4.1.2 Classification by gas cylinder material
According to the type of gas cylinder material, air breathing apparatus
are divided into: a) seamless steel gas cylinders, marked with
code: G; b) aluminum alloy liner carbon fiber fully wrapped gas cylinders (referred to as "composite gas cylinders"), marked with code: F.
4.1.3 Classification by nominal volume of gas cylinders
The nominal volume of the gas cylinder of an air breathing apparatus should be no less than 3 L and no more than 12 L. Gas cylinders may be marked as 3, 4.7, 6.8, 8, 9, 12, etc. according to their actual nominal volume.
4.2 Marking
GB 16556-2025 Respiratory protection—Self-contained open-circuit compressed air breathing apparatus
ICS13.340.30
CCSC73
National Standard of the People's Republic of China
GB16556-2025
Replaces GB/T16556-2007
Respiratory protection—Self-contained open-circuit compressed air breathing apparatus
Released on August 29, 2025 Implementation on September 1, 2026
State Administration for Market Regulation, National Standardization Administration
Contents
Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Classification and Labeling
5 Technical Requirements
6 Test methods
7 Labelling, packaging and information provided by the manufacturer
Appendix A (Normative) Flame Engulfment Test Method
References
Respiratory protection—Self-contained open-circuit compressed air breathing apparatus
1 Scope
This document specifies the technical requirements, labeling, packaging and manufacturer information for self-contained open-circuit compressed air breathing apparatus, and gives the classification and markings, describing the corresponding test methods.
This document applies to self-contained open-circuit compressed air breathing apparatus for industrial and emergency use (hereinafter referred to as air breathing
apparatus). This document does not apply to closed-circuit breathing apparatus, diving breathing apparatus, escape air breathing apparatus and negative pressure air breathing apparatus.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references. For dated references, only the version corresponding to that date applies to this document. For undated references, the latest version (including all amendments) applies to this document.
GB/T1226 General pressure gauge
GB2626-2019 Respiratory protection self-priming filter type anti-particulate respirator GB2890-2022 Respiratory protection self-priming filter type gas mask GB/T3836.1 Explosive atmospheres Part 1: General requirements for equipment
GB/T3836.4 Explosive atmospheres Part 4: Equipment protected by intrinsic safety type "i"
GB/T4208—2017 Degrees of protection provided by enclosures (IP code)
GB/T5099.1 Seamless Steel Gas Cylinders Part 1: Steel Cylinders with a Tensile Strength of Less than 1100 MPa After Quenching and Tempering
GB/T5099.3 Seamless Steel Gas Cylinders Part 3: Normalized Steel Cylinders GB/T5099.4 Seamless Steel Gas Cylinders Part 4: Stainless Steel Seamless Gas Cylinders
GB/T7307—2001 55° Non-Sealing Pipe Thread
GB/T12903 Terminology of Personal Protective Equipment
GB14866—2023 General Technical Specification for Eye and Face Protective Equipment GB/T23465—2009 Practical Performance Evaluation of Respiratory Protective Equipment
GB/T28053 Aluminum Alloy Liner Carbon Fiber Fully Wrapped Gas Cylinders
GB31975 Technical Requirements for Respiratory Protection of Compressed Air
GB/T32166.2—2015 Personal protective equipment Eye and face protection Occupational eye and face protection Part 2: Measurement methods
GB/T34527 Technical requirements for cylinder valves for air breathing apparatus
3 Terms and Definitions
The terms and definitions defined in GB/T 12903 and the following apply to this document.
3.1
Self-contained open-circuit compressed air breathing apparatus uses the mask to fit closely around the wearer's face, isolating the wearer's respiratory organs, eyes and face from the outside toxic and harmful air or oxygen-deficient environment.
A type of respirator that is completely isolated and requires the personnel to carry their own clean compressed air as the breathing air source, and the exhaled gas is directly discharged into the ambient air.
3.2
Emergency air breathing apparatus self-contained open-circuit compressed air breathing apparatus for fire-fighting andemergencyservices A self-contained
open-circuit compressed air breathing apparatus used by workers undertaking emergency tasks such as firefighting, hazardous chemicals disposal, and rescue.
3.3
Industrial air respirator self-contained open-circuit compressed air breathing apparatus for industrial services In addition to the emergency air respirator applicable areas, mining, petrochemical, industry and trade, smelting, transportation, municipal construction, public utilities and other
A self-contained open-circuit compressed air respirator used by workers in various industries.
3.4
Static pressure is the pressure inside the mask
cavity when the air circuit of the air respirator is balanced after the positive pressure device of the air supply valve is opened.
4 Classification and labeling
4.1 Classification
4.1.1 Classification by applicable occasions
According to their applicable occasions, air respirators are divided into: a) industrial air respirators, marking code: GY; b) emergency air respirators, marking code: YJ.
4.1.2 Classification by gas cylinder material
According to the type of gas cylinder material, air breathing apparatus
are divided into: a) seamless steel gas cylinders, marked with
code: G; b) aluminum alloy liner carbon fiber fully wrapped gas cylinders (referred to as "composite gas cylinders"), marked with code: F.
4.1.3 Classification by nominal volume of gas cylinders
The nominal volume of the gas cylinder of an air breathing apparatus should be no less than 3 L and no more than 12 L. Gas cylinders may be marked as 3, 4.7, 6.8, 8, 9, 12, etc. according to their actual nominal volume.
4.2 Marking
