GB 16668-2025 General technical specifications for powder extinguishing system and components English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing thorugh draft translation, self-check, revision and varification) will be delivered upon being ordered.
ICS13.220.10
CCSC84
National Standard of the People's Republic of China
GB16668-2025
Replaces GB16668-2010
General technical requirements for dry powder fire extinguishing systems and components
Issue on August 1, 2025 Implementation on August 1, 2026
State Administration for Market Regulation, National Standardization Administration
Contents
Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Classification
5 Model compilation
6 Requirements
6.1 Working Environment Requirements
6.2 System Requirements
6.3 Dry powder storage container
6.4 Constant pressure action device
6.5 Dry powder storage container outlet release device
6.6 Gas Cylinder Assembly
6.7 Container Valve
6.8 Check Valve
6.9 Drive Control Device
6.10 Collector
6.11 Connecting pipe
6.12 Safety devices
6.13 Leak Detection Device
6.14 Low Leakage High Sealing Valve
6.15 Selector Valve
6.16 Signal Feedback Device
6.17 Pressure Reducing Valve
6.18 Nozzle
6.19 Dry powder hose reel
6.20 Dry Powder Cannon
7 Test methods
7.1 Test conditions and instruments
7.2 Appearance Quality
7.3 Strength test
7.4 Overpressure test
7.5 Sealing testÿ
7.6 Action Test of Constant Pressure Actuator
7.7 Working reliability test
7.8 Vibration test
8 Inspection Rules
8.1 Inspection categories, inspection items and test procedures
8.2 Sampling method
8.3 Number of samples
8.4 Determination of test results
9 Requirements for writing instruction manuals
Appendix A (Normative) System Test Procedure and Sample Quantity
Appendix B (Normative) Dry Powder Storage Container Test Procedure and Sample Quantity
Appendix C (Normative) Constant Pressure Action Device Test Procedure and Sample Quantity
Appendix D (Normative) Release Diaphragm Test Procedure and Sample Quantity
Appendix E (Normative) Relief Valve Test Procedure and Sample Quantity
Appendix F (Normative) Gas Cylinder Group Test Procedure and Sample Quantity
Appendix G (Normative) Container Valve Test Procedure and Sample Quantity
Appendix H (Normative) Check Valve Test Procedure and Sample Quantity
Appendix I (Normative) Drive Device Test Procedure and Sample Quantity
Appendix J (Normative) Manifold Test Procedure and Sample Quantity
Appendix K (Normative) Connecting Pipe Test Procedure and Sample Quantity
Appendix L (Normative) Safety Valve Test Procedure and Sample Quantity
Appendix M (Normative) Safety Relief Device Test Procedure and Sample Quantity
Appendix N (Normative) Pressure Indicator Test Procedure and Sample Quantity
Appendix O (Normative) Weighing Device Test Procedure and Sample Quantity
Appendix P (Normative) Low Leakage High Seal Valve Test Procedure and Sample Quantity
Appendix Q (Normative) Selection Valve Test Procedure and Sample Quantity
Appendix R (Normative) Signal Feedback Device Test Procedure and Sample Quantity
Appendix S (Normative) Pressure Reducing Valve Test Procedure and Sample Quantity
Appendix T (Normative) Nozzle Test Procedure and Sample Quantity
Appendix U (Normative) Dry Powder Hose Reel Test Procedure and Sample Quantity
Appendix V (Normative) Dry Powder Monitor Test Procedure and Sample Quantity
General technical requirements for dry powder fire extinguishing systems and components
1 Scope
This document specifies the classification, model compilation, requirements, inspection rules, and instruction manual writing requirements for dry powder fire extinguishing systems and components, and describes the corresponding test
methods. This document applies to the design, manufacture, and inspection of fixed and semi-fixed dry powder fire extinguishing systems and their components (including cabinet-type dry powder fire extinguishing devices).
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/T150 Pressure Vessels (all parts)
GB/T3181-2008 Paint film color standard GB4066 Dry powder
fire extinguishing agent
GB/T5099.1 Steel seamless gas cylinders Part 1: Steel cylinders with a tensile strength less than 1100 MPa after quenching and tempering GB/T5100 Steel welded gas cylinders GB/T9969 General provisions for industrial product instructions GB19156 Fire monitors
GB19157 General Technical Specifications for Remote-Controlled Fire Monitor
Systems GB25200 Dry Powder
Guns GB25972-2024 Gas Fire Extinguishing Systems and Components JB/
T9273 Electric Contact Pressure Gauges XF61
General Technical Specifications for Drive and Control Devices for Fixed Fire Extinguishing
Systems XF578 Ultrafine Dry Powder Fire Extinguishing Agents
XF979 Class D dry powder fire extinguishing agent
3 Terms and Definitions
he following terms and definitions apply to this document.
3.1
Dry powder fire extinguishing system powderextinguishingsystems is a fire
extinguishing system composed of dry powder storage container, dry powder fire extinguishing agent, drive components, delivery pipeline, spraying components, etc.
3.2
Class D dry powder fire extinguishing system classDpowderextinguishingsystems Dry powder fire
extinguishing system filled with Class D dry powder fire extinguishing agent.
3.3
Fixed dry powder fire extinguishing systems fixedpowderextinguishingsystems A dry powder fire
extinguishing system with all system components fixedly installed.
3.4
Semi-fixed dry powder fire extinguishing systems semi-fixed powder extinguishing systems A dry powder fire
extinguishing system in which some of the system components are movable.
3.5
Gas cylinder type dry powder fire extinguishing system expellantgasstoragecylindertypepowderextinguishingsystems A dry powder fire extinguishing system in
which the dry powder extinguishing agent is stored separately from the driving gas and the dry powder extinguishing agent is sprayed by the driving gas in the gas cylinder.
3.6
Pressure storage type powder extinguishing systems Pressure storage type powder extinguishing systems A dry powder
extinguishing system in which the dry powder extinguishing agent and the driving gas are stored in the same container and the dry powder extinguishing agent is sprayed by the driving gas.
3.7
Cabinet type dry powder fire extinguishing equipment cabinet type powder extinguishing equipment A cabinet type
fire extinguishing equipment that integrates dry powder storage container, drive assembly and spray assembly.
3.8
System maximum working pressure system maximum working pressure The maximum pressure at the
outlet of the pressure reducing valve when the system is operating normally or the equilibrium pressure inside the dry powder storage container at the highest operating ambient temperature.
3.9
Pressurization time: The time from the start of the dry
powder being driven to the time the set pressure is reached in the dry powder storage container.
3.10
Effective spraying time discharging time is the time from the spraying
of dry powder fire extinguishing agent by the spraying component to the end of the spraying of dry powder fire extinguishing agent.
3.11
Filling density: The ratio of the mass of dry
powder fire extinguishing agent in a dry powder storage container to the volume of the dry powder storage container.
3.12
Expellant gas cylinder assemblies Expellant gas cylinder assemblies are gas cylinder
assemblies used to store the expellant dry powder fire extinguishing agent in a gas cylinder type dry powder fire extinguishing system.
3.13
Pilot gas container assemblies are gas cylinder assemblies used to store
components such as pilot container valves and selector valves.
3.14
Pre-setting pressure actuating device is a device that sends mechanical, electrical, pressure,
and other signals when the pressure in the dry powder storage container reaches the set value.
Row device.
3.15
Residual powder ratio: The percentage of the mass of the
remaining dry powder fire extinguishing agent in the dry powder storage container to the mass of the initial dry powder fire extinguishing agent after the system spraying is completed.
4 Categories
4.1 According to the driving mode of dry powder, it is divided into:
a) Gas cylinder type dry powder fire extinguishing system;
b) Pressurized dry powder fire extinguishing system.
4.2 Based on the type of extinguishing agent, they are classified as follows: a) BC dry powder fire extinguishing system;
b) ABC dry powder fire extinguishing system; c) Class
D dry powder fire extinguishing system. 4.3 Based
on the particle size of the extinguishing agent, they are classified as follows:
a) Ordinary dry powder fire extinguishing system;
b) Ultrafine dry powder fire extinguishing system.
4.4 Based on the installation method, it is
divided into: a) Fixed dry powder fire extinguishing
system; b) Semi-fixed dry powder fire extinguishing system.
5 Model compilation
6 Requirements
6.1 Working environment requirements
6.1.1 Operating temperature range
6.1.1.1 The operating environment temperature range of systems (devices) using nitrogen or other inert gases as driving gases should be -20ÿ~50ÿ .
Standard
GB 16668-2025 General technical specifications for powder extinguishing system and components (English Version)
Standard No.
GB 16668-2025
Status
to be valid
Language
English
File Format
PDF
Word Count
33000 words
Price(USD)
990.0
Implemented on
2026-8-1
Delivery
via email in 1~10 business day
Detail of GB 16668-2025
Standard No.
GB 16668-2025
English Name
General technical specifications for powder extinguishing system and components
GB 16668-2025 General technical specifications for powder extinguishing system and components English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing thorugh draft translation, self-check, revision and varification) will be delivered upon being ordered.
ICS13.220.10
CCSC84
National Standard of the People's Republic of China
GB16668-2025
Replaces GB16668-2010
General technical requirements for dry powder fire extinguishing systems and components
Issue on August 1, 2025 Implementation on August 1, 2026
State Administration for Market Regulation, National Standardization Administration
Contents
Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Classification
5 Model compilation
6 Requirements
6.1 Working Environment Requirements
6.2 System Requirements
6.3 Dry powder storage container
6.4 Constant pressure action device
6.5 Dry powder storage container outlet release device
6.6 Gas Cylinder Assembly
6.7 Container Valve
6.8 Check Valve
6.9 Drive Control Device
6.10 Collector
6.11 Connecting pipe
6.12 Safety devices
6.13 Leak Detection Device
6.14 Low Leakage High Sealing Valve
6.15 Selector Valve
6.16 Signal Feedback Device
6.17 Pressure Reducing Valve
6.18 Nozzle
6.19 Dry powder hose reel
6.20 Dry Powder Cannon
7 Test methods
7.1 Test conditions and instruments
7.2 Appearance Quality
7.3 Strength test
7.4 Overpressure test
7.5 Sealing testÿ
7.6 Action Test of Constant Pressure Actuator
7.7 Working reliability test
7.8 Vibration test
8 Inspection Rules
8.1 Inspection categories, inspection items and test procedures
8.2 Sampling method
8.3 Number of samples
8.4 Determination of test results
9 Requirements for writing instruction manuals
Appendix A (Normative) System Test Procedure and Sample Quantity
Appendix B (Normative) Dry Powder Storage Container Test Procedure and Sample Quantity
Appendix C (Normative) Constant Pressure Action Device Test Procedure and Sample Quantity
Appendix D (Normative) Release Diaphragm Test Procedure and Sample Quantity
Appendix E (Normative) Relief Valve Test Procedure and Sample Quantity
Appendix F (Normative) Gas Cylinder Group Test Procedure and Sample Quantity
Appendix G (Normative) Container Valve Test Procedure and Sample Quantity
Appendix H (Normative) Check Valve Test Procedure and Sample Quantity
Appendix I (Normative) Drive Device Test Procedure and Sample Quantity
Appendix J (Normative) Manifold Test Procedure and Sample Quantity
Appendix K (Normative) Connecting Pipe Test Procedure and Sample Quantity
Appendix L (Normative) Safety Valve Test Procedure and Sample Quantity
Appendix M (Normative) Safety Relief Device Test Procedure and Sample Quantity
Appendix N (Normative) Pressure Indicator Test Procedure and Sample Quantity
Appendix O (Normative) Weighing Device Test Procedure and Sample Quantity
Appendix P (Normative) Low Leakage High Seal Valve Test Procedure and Sample Quantity
Appendix Q (Normative) Selection Valve Test Procedure and Sample Quantity
Appendix R (Normative) Signal Feedback Device Test Procedure and Sample Quantity
Appendix S (Normative) Pressure Reducing Valve Test Procedure and Sample Quantity
Appendix T (Normative) Nozzle Test Procedure and Sample Quantity
Appendix U (Normative) Dry Powder Hose Reel Test Procedure and Sample Quantity
Appendix V (Normative) Dry Powder Monitor Test Procedure and Sample Quantity
General technical requirements for dry powder fire extinguishing systems and components
1 Scope
This document specifies the classification, model compilation, requirements, inspection rules, and instruction manual writing requirements for dry powder fire extinguishing systems and components, and describes the corresponding test
methods. This document applies to the design, manufacture, and inspection of fixed and semi-fixed dry powder fire extinguishing systems and their components (including cabinet-type dry powder fire extinguishing devices).
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/T150 Pressure Vessels (all parts)
GB/T3181-2008 Paint film color standard GB4066 Dry powder
fire extinguishing agent
GB/T5099.1 Steel seamless gas cylinders Part 1: Steel cylinders with a tensile strength less than 1100 MPa after quenching and tempering GB/T5100 Steel welded gas cylinders GB/T9969 General provisions for industrial product instructions GB19156 Fire monitors
GB19157 General Technical Specifications for Remote-Controlled Fire Monitor
Systems GB25200 Dry Powder
Guns GB25972-2024 Gas Fire Extinguishing Systems and Components JB/
T9273 Electric Contact Pressure Gauges XF61
General Technical Specifications for Drive and Control Devices for Fixed Fire Extinguishing
Systems XF578 Ultrafine Dry Powder Fire Extinguishing Agents
XF979 Class D dry powder fire extinguishing agent
3 Terms and Definitions
he following terms and definitions apply to this document.
3.1
Dry powder fire extinguishing system powderextinguishingsystems is a fire
extinguishing system composed of dry powder storage container, dry powder fire extinguishing agent, drive components, delivery pipeline, spraying components, etc.
3.2
Class D dry powder fire extinguishing system classDpowderextinguishingsystems Dry powder fire
extinguishing system filled with Class D dry powder fire extinguishing agent.
3.3
Fixed dry powder fire extinguishing systems fixedpowderextinguishingsystems A dry powder fire
extinguishing system with all system components fixedly installed.
3.4
Semi-fixed dry powder fire extinguishing systems semi-fixed powder extinguishing systems A dry powder fire
extinguishing system in which some of the system components are movable.
3.5
Gas cylinder type dry powder fire extinguishing system expellantgasstoragecylindertypepowderextinguishingsystems A dry powder fire extinguishing system in
which the dry powder extinguishing agent is stored separately from the driving gas and the dry powder extinguishing agent is sprayed by the driving gas in the gas cylinder.
3.6
Pressure storage type powder extinguishing systems Pressure storage type powder extinguishing systems A dry powder
extinguishing system in which the dry powder extinguishing agent and the driving gas are stored in the same container and the dry powder extinguishing agent is sprayed by the driving gas.
3.7
Cabinet type dry powder fire extinguishing equipment cabinet type powder extinguishing equipment A cabinet type
fire extinguishing equipment that integrates dry powder storage container, drive assembly and spray assembly.
3.8
System maximum working pressure system maximum working pressure The maximum pressure at the
outlet of the pressure reducing valve when the system is operating normally or the equilibrium pressure inside the dry powder storage container at the highest operating ambient temperature.
3.9
Pressurization time: The time from the start of the dry
powder being driven to the time the set pressure is reached in the dry powder storage container.
3.10
Effective spraying time discharging time is the time from the spraying
of dry powder fire extinguishing agent by the spraying component to the end of the spraying of dry powder fire extinguishing agent.
3.11
Filling density: The ratio of the mass of dry
powder fire extinguishing agent in a dry powder storage container to the volume of the dry powder storage container.
3.12
Expellant gas cylinder assemblies Expellant gas cylinder assemblies are gas cylinder
assemblies used to store the expellant dry powder fire extinguishing agent in a gas cylinder type dry powder fire extinguishing system.
3.13
Pilot gas container assemblies are gas cylinder assemblies used to store
components such as pilot container valves and selector valves.
3.14
Pre-setting pressure actuating device is a device that sends mechanical, electrical, pressure,
and other signals when the pressure in the dry powder storage container reaches the set value.
Row device.
3.15
Residual powder ratio: The percentage of the mass of the
remaining dry powder fire extinguishing agent in the dry powder storage container to the mass of the initial dry powder fire extinguishing agent after the system spraying is completed.
4 Categories
4.1 According to the driving mode of dry powder, it is divided into:
a) Gas cylinder type dry powder fire extinguishing system;
b) Pressurized dry powder fire extinguishing system.
4.2 Based on the type of extinguishing agent, they are classified as follows: a) BC dry powder fire extinguishing system;
b) ABC dry powder fire extinguishing system; c) Class
D dry powder fire extinguishing system. 4.3 Based
on the particle size of the extinguishing agent, they are classified as follows:
a) Ordinary dry powder fire extinguishing system;
b) Ultrafine dry powder fire extinguishing system.
4.4 Based on the installation method, it is
divided into: a) Fixed dry powder fire extinguishing
system; b) Semi-fixed dry powder fire extinguishing system.
5 Model compilation
6 Requirements
6.1 Working environment requirements
6.1.1 Operating temperature range
6.1.1.1 The operating environment temperature range of systems (devices) using nitrogen or other inert gases as driving gases should be -20ÿ~50ÿ .
