GB 16669-2026 General technical specifications for carbon dioxide fire extinguishing systems and components English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB 16669-2026
General technical specifications for carbon dioxide fire extinguishing systems and components
二氧化碳灭火系统及部件通用技术条件
Issue date: 2026-01-28 Implementation date: 2027-02-01
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
1 Scope
2 Normative References
3 Terms and Definitions
4 Model Designation Method
4.1 Extinguishing System Model
4.2 Component Model
5 Requirements
5.1 General Requirements
5.2 Extinguishing System
5.3 Cylinder Assemblies
5.4 Nozzles
5.5 Selection Valves
5.6 Check Valves
5.7 Collecting Manifolds
5.8 Connecting Hoses/Pipes
5.9 Actuating Devices
5.10 Control Devices
5.11 Signal Feedback Devices
5.12 Low Leakage High Seal Valves
5.13 Pipe Fittings
5.14 Supports and Hangers
5.15 Flow Design Calculation and Verification
6 Test Methods
6.1 Test Requirements
6.2 Visual Inspection, Marking, Documentation, Materials, Extinguishing Agent, Pressurising Gas, Cylinders, Pressure Indicator Dial and Display Screen
6.3 Hydraulic Strength Test
6.4 Gas Tightness Test
6.5 Salt Spray Corrosion Test
6.6 Stress Corrosion Test
6.7 Sulphur Dioxide Corrosion Test
6.8 Voltage Withstand Performance Test
6.9 Insulation Resistance Test
6.10 Extinguishing System Test
6.11 Monitoring Information Type Inspection
6.12 Status Sensing Unit Test
6.13 Data Transmission Unit Test
6.14 DTU Data Application Platform Test
6.15 Cylinder Assembly Filling Density Test
6.16 Vibration Test
6.17 Temperature Cycle Leakage Test
6.18 Cylinder Assembly Tilt Impact Test
6.19 Impact Resistance Test of False Discharge Prevention Device
6.20 Extinguishing Agent Cylinder Assembly Discharge Time
6.21 Overpressure Test
6.22 Operational Reliability Test
6.23 Operation Test under Maximum and Minimum Working Pressure
6.24 Local Resistance Loss Test
6.25 Manual Operation Test
6.26 Contact Resistance Test
6.27 Weighing Device Alarm Function Test
6.28 High and Low Temperature Test
6.29 Weighing Device Overload Test
6.30 Degree of Protection
6.31 Pressure Indicator Indication Basic Error Test
6.32 Pressure Indicator Alternating Load Test
6.33 Pressure Indicator Alarm Function Test
6.34 Digital Pressure Indicator Power Supply Test
6.35 Safety Relief Device Operation Test
6.36 Nozzle Protective Cap Test
6.37 Nozzle Flow Characteristics Test
6.38 Nozzle Heat and Pressure Resistance Test
6.39 Nozzle Heat and Thermal Shock Resistance Test
6.40 Nozzle Impact Resistance Test
6.41 Total Flooding Nozzle Discharge Characteristics Test
6.42 Overhead Nozzle Discharge Characteristics Test
6.43 Sidewall Nozzle Discharge Characteristics Test
6.44 Check Valve Opening Pressure Test
6.45 Collecting Manifold Flow Test
6.46 Non-Metallic Connecting Hose Heat Ageing Test
6.47 Non-Metallic Connecting Hose Low Temperature Test
6.48 Actuating Device Signal Feedback Function Test
6.49 Control Device Test
6.50 Signal Feedback Device Operation Test
6.51 Low Leakage High Seal Valve Closing Pressure Test
6.52 Coating Test
6.53 Load Bearing Capacity Test
6.54 Cyclic Loading Test
6.55 Fatigue Test
7 Inspection Rules
7.1 Classification of Inspection, Inspection Items and Test Procedure
7.2 Sampling Method and Sample Quantity
7.3 Determination of Inspection Results
8 Instruction Manual
9 Extinguishing Agent Filling
10 Packaging, Transport and Storage
10.1 Packaging
10.2 Transport
10.3 Storage
Annex A (Informative) Model Designation Method for Components
Annex B (Normative) Test Procedure and Sample Quantity for Extinguishing System
Annex C (Normative) Test Procedure and Sample Quantity for Extinguishing Agent Cylinder Assembly
Annex D (Normative) Test Procedure and Sample Quantity for Actuating Gas Cylinder Assembly
Annex E (Normative) Test Procedure and Sample Quantity for Gas Cylinder
Annex F (Normative) Test Procedure and Sample Quantity for Container Valve
Annex G (Normative) Test Procedure and Sample Quantity for Weighing Device
Annex H (Normative) Test Procedure and Sample Quantity for Pressure Indicator
Annex I (Normative) Test Procedure and Sample Quantity for Safety Relief Device
Annex J (Normative) Test Procedure and Sample Quantity for Nozzle
Annex K (Normative) Test Procedure and Sample Quantity for Selection Valve
Annex L (Normative) Test Procedure and Sample Quantity for Check Valve
Annex M (Normative) Test Procedure and Sample Quantity for Collecting Manifold
Annex N (Normative) Test Procedure and Sample Quantity for Connecting Hose/Pipe
Annex O (Normative) Test Procedure and Sample Quantity for Actuating Device
Annex P (Normative) Test Procedure and Sample Quantity for Control Device
Annex Q (Normative) Test Procedure and Sample Quantity for Signal Feedback Device
Annex R (Normative) Test Procedure and Sample Quantity for Low Leakage High Seal Valve
Annex S (Normative) Test Procedure and Sample Quantity for Pipe Fittings
Annex T (Normative) Test Procedure and Sample Quantity for Supports and Hangers
Bibliography
Carbon dioxide extinguishing systems and components — General technical specifications
1 Scope
This document gives the model designation method, specifies the requirements, flow design calculation and verification, inspection rules, instruction manual, extinguishing agent filling, packaging, transport and storage for carbon dioxide extinguishing systems (hereinafter referred to as "extinguishing systems") and their components (cylinder assemblies, nozzles, selection valves, check valves, collecting manifolds, connecting hoses/pipes, safety relief devices, actuating devices, control devices, signal feedback devices, low leakage high seal valves, pipe fittings, and supports and hangers), and describes the corresponding test methods.
This document applies to the design, manufacture and inspection of high pressure carbon dioxide extinguishing systems.
2 Normative References
The contents of the following documents constitute essential provisions of this document through normative reference. For dated references, only the edition cited applies. For undated references, the latest edition (including all amendments) applies.
GB/T 567.1-2012 Bursting disc safety devices — Part 1: Basic requirements
GB/T 4208-2017 Degrees of protection provided by enclosure (IP code)
GB 4396 Carbon dioxide fire extinguishing agent
GB 4717-2024 Fire alarm control unit
GB/T 4956 Non magnetic coatings on magnetic substrates — Measurement of coating thickness — Magnetic method
GB/T 5099.1 Seamless steel gas cylinders — Part 1: Quenched and tempered steel cylinders with tensile strength less than 1100 MPa
GB/T 5099.3 Seamless steel gas cylinders — Part 3: Normalized cylinders
GB/T 6052 Industrial liquid carbon dioxide
GB/T 8979 Pure nitrogen, high purity nitrogen and ultra high purity nitrogen
GB/T 9969 General principles for preparation of instructions for use of industrial products
GB/T 13384 General specifications for packing of mechanical and electrical products
GB 20128 Inert gas fire extinguishing agents
GB/T 25208-2010 Environmental test methods for fixed extinguishing system products
GB 25972-2024 Gas extinguishing systems and components
GB/T 37267-2018 General technical specification for seismic supports and hangers for building
NB/T 10558 Coating and transport packaging for pressure vessels
TSG 23 Safety technical regulation for gas cylinders
XF 61-2010 General technical specifications for drive and control devices of fixed extinguishing systems
XF 1203 Filling regulation for gas extinguishing system
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB 25972-2024 and the following apply.
3.1 discharge time
At an ambient temperature of 20 °C, the time required for a nozzle to discharge 95% of the design quantity of carbon dioxide.
4 Model designation method
4.1 Extinguishing system model
The system model consists of the system category code QME and the main parameter (volume of the extinguishing agent cylinder assembly).
Example: QME70 represents a carbon dioxide extinguishing system with an extinguishing agent cylinder assembly volume of 70 L.
4.2 Component model
The model designation method for components is given in Annex A.
5 Requirements
5.1 General requirements
5.1.1 Materials
5.1.1.1 Gas cylinders
Gas cylinders shall be seamless steel cylinders, and their materials shall comply with GB/T 5099.1 or GB/T 5099.3.
5.1.1.2 Valves
The bodies and internal mechanical parts of components such as container valves (excluding safety relief device components), selection valves, check valves, low leakage high seal valves and signal feedback devices shall be made of austenitic stainless steel or copper alloy. If other materials are used, their strength and corrosion resistance shall also comply with 5.1.4 and 5.1.6.
5.1.1.3 Seals
Seals in contact with the filling medium shall be compatible with the filling medium.
5.1.1.4 Nozzles
All components of nozzles shall be made of corrosion resistant materials, and their mechanical strength, temperature resistance and corrosion resistance shall meet the requirements of 5.4.3 to 5.4.6.
5.1.1.5 Pipes and pipe fittings
The materials for pipes and pipe fittings shall meet the following requirements:
a)Collecting manifolds shall be made of seamless steel pipes, and the material shall have corrosion resistance or the internal and external surfaces shall be treated against corrosion;
b) Connecting hoses/pipes shall be high pressure hoses or metal pipes with equivalent pressure resistance and impact/vibration resistance;
c) Pipe fittings shall be made of corrosion resistant metal materials; cast iron parts shall not be used.
5.1.1.6 Supports and hangers
The materials for supports and hangers shall meet the following requirements:
a)Supports and hangers shall be made of metal materials resistant to environmental corrosion; cast iron parts shall not be used;
b) Materials for seismic supports and hangers shall also comply with 4.2 of GB/T 37267-2018.
5.1.2 Extinguishing agent cylinder assembly filling medium
Carbon dioxide extinguishing agent shall comply with GB 4396.
5.1.3 Actuating gas cylinder assembly filling medium
The filling medium for actuating gas cylinder assemblies shall meet the following requirements:
a) Nitrogen shall comply with GB/T 8979 or GB 20128;
b) Carbon dioxide shall comply with GB/T 6052 or GB 4396.
5.1.4 Strength
When tested by the hydraulic strength test method specified in 6.3, the test specimen shall show no leakage or deformation.
5.1.5 Sealing
When tested by the gas tightness test method specified in 6.4, the sealing parts of the test specimen shall show no bubble leakage.
5.1.6 Corrosion resistance
5.1.6.1 Salt spray corrosion resistance
When tested by the salt spray corrosion test method specified in 6.5, the test specimen shall show no corrosion damage.
5.1.6.2 Stress corrosion resistance
When tested by the stress corrosion test method specified in 6.6, the test specimen shall show no cracks or damage.
5.1.6.3 Sulphur dioxide corrosion resistance
When tested by the sulphur dioxide corrosion test method specified in 6.7, the test specimen shall show no corrosion damage.
5.1.7 Voltage withstand performance
When tested by the voltage withstand performance test method specified in 6.8, there shall be no surface arcing, scanning discharge, corona or breakdown between the terminals of the test specimen and the enclosure.
5.1.8 Insulation requirement
When tested by the insulation resistance test method specified in 6.9, the insulation resistance between the terminals of the test specimen and the enclosure shall be greater than 20 MΩ.
5.2 Extinguishing system
5.2.1 Basic parameters
Standard
GB 16669-2026 General technical specifications for carbon dioxide fire extinguishing systems and components (English Version)
Standard No.
GB 16669-2026
Status
to be valid
Language
English
File Format
PDF
Word Count
28500 words
Price(USD)
855.0
Implemented on
2027-2-1
Delivery
via email in 1~10 business day
Detail of GB 16669-2026
Standard No.
GB 16669-2026
English Name
General technical specifications for carbon dioxide fire extinguishing systems and components
GB 16669-2026 General technical specifications for carbon dioxide fire extinguishing systems and components English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB 16669-2026
General technical specifications for carbon dioxide fire extinguishing systems and components
二氧化碳灭火系统及部件通用技术条件
Issue date: 2026-01-28 Implementation date: 2027-02-01
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
1 Scope
2 Normative References
3 Terms and Definitions
4 Model Designation Method
4.1 Extinguishing System Model
4.2 Component Model
5 Requirements
5.1 General Requirements
5.2 Extinguishing System
5.3 Cylinder Assemblies
5.4 Nozzles
5.5 Selection Valves
5.6 Check Valves
5.7 Collecting Manifolds
5.8 Connecting Hoses/Pipes
5.9 Actuating Devices
5.10 Control Devices
5.11 Signal Feedback Devices
5.12 Low Leakage High Seal Valves
5.13 Pipe Fittings
5.14 Supports and Hangers
5.15 Flow Design Calculation and Verification
6 Test Methods
6.1 Test Requirements
6.2 Visual Inspection, Marking, Documentation, Materials, Extinguishing Agent, Pressurising Gas, Cylinders, Pressure Indicator Dial and Display Screen
6.3 Hydraulic Strength Test
6.4 Gas Tightness Test
6.5 Salt Spray Corrosion Test
6.6 Stress Corrosion Test
6.7 Sulphur Dioxide Corrosion Test
6.8 Voltage Withstand Performance Test
6.9 Insulation Resistance Test
6.10 Extinguishing System Test
6.11 Monitoring Information Type Inspection
6.12 Status Sensing Unit Test
6.13 Data Transmission Unit Test
6.14 DTU Data Application Platform Test
6.15 Cylinder Assembly Filling Density Test
6.16 Vibration Test
6.17 Temperature Cycle Leakage Test
6.18 Cylinder Assembly Tilt Impact Test
6.19 Impact Resistance Test of False Discharge Prevention Device
6.20 Extinguishing Agent Cylinder Assembly Discharge Time
6.21 Overpressure Test
6.22 Operational Reliability Test
6.23 Operation Test under Maximum and Minimum Working Pressure
6.24 Local Resistance Loss Test
6.25 Manual Operation Test
6.26 Contact Resistance Test
6.27 Weighing Device Alarm Function Test
6.28 High and Low Temperature Test
6.29 Weighing Device Overload Test
6.30 Degree of Protection
6.31 Pressure Indicator Indication Basic Error Test
6.32 Pressure Indicator Alternating Load Test
6.33 Pressure Indicator Alarm Function Test
6.34 Digital Pressure Indicator Power Supply Test
6.35 Safety Relief Device Operation Test
6.36 Nozzle Protective Cap Test
6.37 Nozzle Flow Characteristics Test
6.38 Nozzle Heat and Pressure Resistance Test
6.39 Nozzle Heat and Thermal Shock Resistance Test
6.40 Nozzle Impact Resistance Test
6.41 Total Flooding Nozzle Discharge Characteristics Test
6.42 Overhead Nozzle Discharge Characteristics Test
6.43 Sidewall Nozzle Discharge Characteristics Test
6.44 Check Valve Opening Pressure Test
6.45 Collecting Manifold Flow Test
6.46 Non-Metallic Connecting Hose Heat Ageing Test
6.47 Non-Metallic Connecting Hose Low Temperature Test
6.48 Actuating Device Signal Feedback Function Test
6.49 Control Device Test
6.50 Signal Feedback Device Operation Test
6.51 Low Leakage High Seal Valve Closing Pressure Test
6.52 Coating Test
6.53 Load Bearing Capacity Test
6.54 Cyclic Loading Test
6.55 Fatigue Test
7 Inspection Rules
7.1 Classification of Inspection, Inspection Items and Test Procedure
7.2 Sampling Method and Sample Quantity
7.3 Determination of Inspection Results
8 Instruction Manual
9 Extinguishing Agent Filling
10 Packaging, Transport and Storage
10.1 Packaging
10.2 Transport
10.3 Storage
Annex A (Informative) Model Designation Method for Components
Annex B (Normative) Test Procedure and Sample Quantity for Extinguishing System
Annex C (Normative) Test Procedure and Sample Quantity for Extinguishing Agent Cylinder Assembly
Annex D (Normative) Test Procedure and Sample Quantity for Actuating Gas Cylinder Assembly
Annex E (Normative) Test Procedure and Sample Quantity for Gas Cylinder
Annex F (Normative) Test Procedure and Sample Quantity for Container Valve
Annex G (Normative) Test Procedure and Sample Quantity for Weighing Device
Annex H (Normative) Test Procedure and Sample Quantity for Pressure Indicator
Annex I (Normative) Test Procedure and Sample Quantity for Safety Relief Device
Annex J (Normative) Test Procedure and Sample Quantity for Nozzle
Annex K (Normative) Test Procedure and Sample Quantity for Selection Valve
Annex L (Normative) Test Procedure and Sample Quantity for Check Valve
Annex M (Normative) Test Procedure and Sample Quantity for Collecting Manifold
Annex N (Normative) Test Procedure and Sample Quantity for Connecting Hose/Pipe
Annex O (Normative) Test Procedure and Sample Quantity for Actuating Device
Annex P (Normative) Test Procedure and Sample Quantity for Control Device
Annex Q (Normative) Test Procedure and Sample Quantity for Signal Feedback Device
Annex R (Normative) Test Procedure and Sample Quantity for Low Leakage High Seal Valve
Annex S (Normative) Test Procedure and Sample Quantity for Pipe Fittings
Annex T (Normative) Test Procedure and Sample Quantity for Supports and Hangers
Bibliography
Carbon dioxide extinguishing systems and components — General technical specifications
1 Scope
This document gives the model designation method, specifies the requirements, flow design calculation and verification, inspection rules, instruction manual, extinguishing agent filling, packaging, transport and storage for carbon dioxide extinguishing systems (hereinafter referred to as "extinguishing systems") and their components (cylinder assemblies, nozzles, selection valves, check valves, collecting manifolds, connecting hoses/pipes, safety relief devices, actuating devices, control devices, signal feedback devices, low leakage high seal valves, pipe fittings, and supports and hangers), and describes the corresponding test methods.
This document applies to the design, manufacture and inspection of high pressure carbon dioxide extinguishing systems.
2 Normative References
The contents of the following documents constitute essential provisions of this document through normative reference. For dated references, only the edition cited applies. For undated references, the latest edition (including all amendments) applies.
GB/T 567.1-2012 Bursting disc safety devices — Part 1: Basic requirements
GB/T 4208-2017 Degrees of protection provided by enclosure (IP code)
GB 4396 Carbon dioxide fire extinguishing agent
GB 4717-2024 Fire alarm control unit
GB/T 4956 Non magnetic coatings on magnetic substrates — Measurement of coating thickness — Magnetic method
GB/T 5099.1 Seamless steel gas cylinders — Part 1: Quenched and tempered steel cylinders with tensile strength less than 1100 MPa
GB/T 5099.3 Seamless steel gas cylinders — Part 3: Normalized cylinders
GB/T 6052 Industrial liquid carbon dioxide
GB/T 8979 Pure nitrogen, high purity nitrogen and ultra high purity nitrogen
GB/T 9969 General principles for preparation of instructions for use of industrial products
GB/T 13384 General specifications for packing of mechanical and electrical products
GB 20128 Inert gas fire extinguishing agents
GB/T 25208-2010 Environmental test methods for fixed extinguishing system products
GB 25972-2024 Gas extinguishing systems and components
GB/T 37267-2018 General technical specification for seismic supports and hangers for building
NB/T 10558 Coating and transport packaging for pressure vessels
TSG 23 Safety technical regulation for gas cylinders
XF 61-2010 General technical specifications for drive and control devices of fixed extinguishing systems
XF 1203 Filling regulation for gas extinguishing system
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB 25972-2024 and the following apply.
3.1 discharge time
At an ambient temperature of 20 °C, the time required for a nozzle to discharge 95% of the design quantity of carbon dioxide.
4 Model designation method
4.1 Extinguishing system model
The system model consists of the system category code QME and the main parameter (volume of the extinguishing agent cylinder assembly).
Example: QME70 represents a carbon dioxide extinguishing system with an extinguishing agent cylinder assembly volume of 70 L.
4.2 Component model
The model designation method for components is given in Annex A.
5 Requirements
5.1 General requirements
5.1.1 Materials
5.1.1.1 Gas cylinders
Gas cylinders shall be seamless steel cylinders, and their materials shall comply with GB/T 5099.1 or GB/T 5099.3.
5.1.1.2 Valves
The bodies and internal mechanical parts of components such as container valves (excluding safety relief device components), selection valves, check valves, low leakage high seal valves and signal feedback devices shall be made of austenitic stainless steel or copper alloy. If other materials are used, their strength and corrosion resistance shall also comply with 5.1.4 and 5.1.6.
5.1.1.3 Seals
Seals in contact with the filling medium shall be compatible with the filling medium.
5.1.1.4 Nozzles
All components of nozzles shall be made of corrosion resistant materials, and their mechanical strength, temperature resistance and corrosion resistance shall meet the requirements of 5.4.3 to 5.4.6.
5.1.1.5 Pipes and pipe fittings
The materials for pipes and pipe fittings shall meet the following requirements:
a)Collecting manifolds shall be made of seamless steel pipes, and the material shall have corrosion resistance or the internal and external surfaces shall be treated against corrosion;
b) Connecting hoses/pipes shall be high pressure hoses or metal pipes with equivalent pressure resistance and impact/vibration resistance;
c) Pipe fittings shall be made of corrosion resistant metal materials; cast iron parts shall not be used.
5.1.1.6 Supports and hangers
The materials for supports and hangers shall meet the following requirements:
a)Supports and hangers shall be made of metal materials resistant to environmental corrosion; cast iron parts shall not be used;
b) Materials for seismic supports and hangers shall also comply with 4.2 of GB/T 37267-2018.
5.1.2 Extinguishing agent cylinder assembly filling medium
Carbon dioxide extinguishing agent shall comply with GB 4396.
5.1.3 Actuating gas cylinder assembly filling medium
The filling medium for actuating gas cylinder assemblies shall meet the following requirements:
a) Nitrogen shall comply with GB/T 8979 or GB 20128;
b) Carbon dioxide shall comply with GB/T 6052 or GB 4396.
5.1.4 Strength
When tested by the hydraulic strength test method specified in 6.3, the test specimen shall show no leakage or deformation.
5.1.5 Sealing
When tested by the gas tightness test method specified in 6.4, the sealing parts of the test specimen shall show no bubble leakage.
5.1.6 Corrosion resistance
5.1.6.1 Salt spray corrosion resistance
When tested by the salt spray corrosion test method specified in 6.5, the test specimen shall show no corrosion damage.
5.1.6.2 Stress corrosion resistance
When tested by the stress corrosion test method specified in 6.6, the test specimen shall show no cracks or damage.
5.1.6.3 Sulphur dioxide corrosion resistance
When tested by the sulphur dioxide corrosion test method specified in 6.7, the test specimen shall show no corrosion damage.
5.1.7 Voltage withstand performance
When tested by the voltage withstand performance test method specified in 6.8, there shall be no surface arcing, scanning discharge, corona or breakdown between the terminals of the test specimen and the enclosure.
5.1.8 Insulation requirement
When tested by the insulation resistance test method specified in 6.9, the insulation resistance between the terminals of the test specimen and the enclosure shall be greater than 20 MΩ.
5.2 Extinguishing system
5.2.1 Basic parameters
