GB 16668-2025General technical specifications for powder extinguishing system and components (English PDF)

National Standard of the People's Republic of China

ICS

13.220.10

Classification

C84

Issued by: State Administration for Market Regulation; Standardization Administration of China

Contents

• Preface
• 1 Scope
• 2 Normative references
• 3 Terms and Definitions
• 4 Categories
• 5 Model compilation
• 6 Requirement
• 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 group
• 6.7 Container valve
• 6.8 Check valve
• 6.9 Drive Control Device
• 6.10 Collector
• 6.11 Connecting pipe
• 6.12 Safety protection 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 monitor
• 7 Test methods
• 7.1 Test conditions and instruments
• 7.2 Appearance Quality
• 7.3 Strength test
• 7.4 Overpressure test
• 7.5 Sealing test
• 7.6 Constant pressure action device action test
• 7.7 Working reliability test
• 7.8 Vibration test
• 7.9 Safety valve set pressure
• 7.10 Manual operation test
• 7.11 Salt spray corrosion test
• 7.12 Temperature cycle leakage test
• 7.13 Safety relief device operation test
• 7.14 Check valve opening pressure test
• 7.15 Hot air aging test
• 7.16 Voltage Withstand Test
• 7.17 Insulation resistance test
• 7.18 Weighing device alarm function test
• 7.19 High and Low Temperature Test
• 7.20 Basic error test of indication
• 7.21 Pressure indicator alternating load test
• 7.22 Signal feedback device contact resistance test
• 7.23 Weighing device overload test
• 7.24 Signal feedback device action test
• 7.25 Local resistance loss - equivalent length determination method
• 7.26 Heat and pressure resistance test
• 7.27 Impact resistance test
• 7.28 Local application nozzle powder distribution performance test
• 7.29 Anti-splash performance test
• 7.30 Fully flooded nozzle powder distribution performance test
• 7.31 Low temperature resistance test
• 7.32 System appearance inspection
• 7.33 System Structure Check
• 7.34 Total flooding fire extinguishing test
• 7.35 Local application fire extinguishing test
• 7.36 Class D fire extinguishing test
• 7.37 Dry powder residual rate test
• 8 Inspection Rules
• 8.1 Inspection categories, inspection items and test procedures
• 8.2 Sampling Methods
• 8.3 Sample quantity
• 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 Film Test Procedure and Sample Quantity
• Appendix E (Normative) Release Valve Test Procedure and Sample Quantity
• Appendix F (Normative) Gas Cylinder Group Test Procedure and Sample Quantity