GB16668-2010
General technical specifications for powder extinguishing system and components
干粉灭火系统及部件通用技术条件
GB 16668-2010 is a current mandatory Chinese national standard for General technical specifications for powder extinguishing system and components. It appears in the Environment compliance cluster with a product safety focus and has an implementation date of Mar 1, 2011.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to fixed and semi-fixed powder extinguishing systems, including cabinet-type powder extinguishing equipment. It covers ABC and BC powder extinguishing systems, while D class powder extinguishing systems may refer to it for compliance. It is mandatory for manufacturers producing fire suppression systems for the Chinese market.
Technical requirements
The standard specifies comprehensive requirements for the working environment, structural integrity, and operational performance of powder extinguishing systems. Systems must feature automatic, manual, and mechanical emergency operation modes. It also defines the maximum effective discharge time and residual powder ratio to ensure optimal fire suppression efficacy. For individual components, the standard sets strict criteria for dry powder storage containers, requiring specific wall thickness calculations and pressure resistance capabilities. It also details the material, strength, and sealing requirements for critical valves, including container valves, check valves, and selector valves, ensuring long-term reliability under high pressure. Safety and monitoring devices are heavily regulated. The standard mandates the inclusion of safety relief valves and leak detection devices, such as pressure indicators or weighing assemblies. These components must trigger reliable alarms when gas leakage reaches critical thresholds. Additionally, it outlines the parameters for pyrotechnic generators and pressure reducing valves used in specific system types. Nozzle performance, including heat resistance, impact resistance, and powder distribution patterns, is strictly defined for both total flooding and local application scenarios. The standard also references requirements for dry powder hose reels and monitors, aligning with other specific national standards like GB 25200 and GB 19156.
Testing methods
The standard outlines a rigorous suite of testing procedures to validate component and system integrity. Key tests include strength tests conducted at specific multiples of the maximum working pressure, and overpressure tests to ensure no rupture occurs. Sealing tests are mandatory to prevent gas and powder leakage under operational pressures. Additionally, it specifies salt spray corrosion tests, vibration tests, temperature cycling leak tests, and full-scale fire extinguishing tests for both Class A and Class B fires to verify real-world performance.
FAQs
What products are regulated under GB 16668-2010?
GB 16668-2010 regulates fixed and semi-fixed powder extinguishing systems and their associated components, including storage containers, valves, nozzles, and driving devices. It is mandatory for all such fire suppression systems entering the Chinese market.
Are there any updates from the previous version of GB 16668?
Yes, this 2010 version replaces GB 16668-1996. Major updates include modified classification criteria, the addition of requirements for dry powder monitors, updated inspection rules, and the inclusion of numerous normative appendices detailing test procedures.
How does GB 16668-2010 address fire extinguishing performance?
The standard mandates specific extinguishing performance for both total flooding and local application systems. Systems must extinguish Class A and Class B fires within specified timeframes without re-ignition. It also limits the residual powder ratio to ensure efficient agent discharge.
The summary above provides a high-level overview of GB 16668-2010. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 16668-2010 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Product
- CCS
- C84
- ICS
- 13.220.10
- Competent department
- National Fire and Rescue Administration
- Technical committee
- National Technical Committee on Fire Protection of Standardization Administration of China