GB16669-2026
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
GB 16669-2026 is an upcoming mandatory Chinese national standard for General technical specifications for carbon dioxide fire extinguishing systems and components. It appears in the Environment compliance cluster with a product safety focus and has an implementation date of Feb 1, 2027.
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 the design, manufacture, and inspection of high-pressure carbon dioxide fire extinguishing systems and their integral components. It covers critical parts such as cylinder assemblies, nozzles, selector valves, check valves, and driving devices. It is mandatory for manufacturers producing CO2 fire suppression systems for the Chinese market. The standard specifically targets high-pressure systems and does not cover low-pressure CO2 systems.
Technical requirements
The standard specifies stringent material and structural requirements for system components. Cylinders must be seamless steel, while valves and nozzles require corrosion-resistant materials like austenitic stainless steel or copper alloys. Manufacturers must ensure all sealing components are compatible with the extinguishing agent. It also introduces new requirements for seismic supports and hangers. Operational parameters define the system's working temperature range (0°C to +50°C) and maximum working pressure. The standard mandates that total flooding systems have a discharge time not exceeding 60 seconds. Systems must feature automatic, manual, and mechanical emergency start functions with an adjustable delay of 0 to 30 seconds. Significant updates include requirements for system status monitoring and data application platform functionalities. Additionally, it specifies new guidelines for accidental discharge protection devices on cylinder valves and flow design calculations. Compliance with the updated filling, packaging, and transportation requirements is essential for market access.
Testing methods
The standard outlines comprehensive testing procedures to verify component reliability and safety. Key tests include hydraulic strength and air tightness tests to ensure structural integrity under pressure. Environmental durability is assessed through salt spray, stress corrosion, and temperature cycle leak tests. Specific nozzle performance is evaluated via discharge characteristic tests for both total flooding and local application scenarios. Additionally, vibration and tip-over impact tests are mandated for cylinder assemblies.
FAQs
What products are regulated under GB 16669-2026?
It regulates high-pressure carbon dioxide fire extinguishing systems and their components, including cylinder assemblies, nozzles, selector valves, and control devices. It does not apply to low-pressure CO2 systems.
What are the main updates in the 2026 version compared to GB 16669-2010?
The 2026 version introduces requirements for system status monitoring, seismic supports, accidental discharge protection devices, and flow design validation. It also adds specific chapters for agent filling, packaging, transportation, and storage.
Does GB 16669-2026 specify testing for nozzles?
Yes, it includes detailed testing methods for nozzle flow characteristics, thermal and cold shock resistance, and impact resistance. Nozzles must pass concentration distribution tests for both total flooding and local application setups.
The summary above provides a high-level overview of GB 16669-2026. 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 16669-2026 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Product
- CCS
- C83
- ICS
- 13.220.10
- Competent department
- National Fire and Rescue Administration
- Technical committee
- National Technical Committee on Fire Protection of Standardization Administration of China
Relationships
Replaces:GB 16669-2010 (Current)