General Technical Requirements for Carbon Dioxide Fire Extinguishing Systems and Components
This standard was developed by the National Fire Standards Working Group and issued in 1996 by the Ministry of Public Security of the People’s Republic of China. This standard is applicable to the general technical requirements of carbon dioxide fire extinguishing systems and components.
1. Scope
This standard applies to carbon dioxide fire extinguishing systems and components installed in indoor environments with a volume of not more than 500m3, and in outdoor spaces with a volume of not more than 1000m3.
2. Normative References
Chinese Standards:
GB 3836.1-1993 Explosive atmospheres - Part 1: Equipment - General requirements
DB 31/808-1994 Fixed fire extinguishing system for buildings
3. Terms and Definitions
3.1 Carbon dioxide fire extinguishing system
A system consisting of tanks, piping, valves, nozzles, and other components that stores SF6, fills the closed space with blanketing gas, and effectively extinguishes the fire in the space by reducing the oxygen level.
3.2 component
A component of a carbon dioxide fire extinguishing system, including carbon dioxide generators, cylinders, regulators, valves, nozzles, and other ancillary equipment.
4. General Requirements
4.1 Basic requirements
4.1.1 Products manufactured according to this standard shall comply with national and industrial security requirements, and shall be free from defects that may affect the working performance and quality.
4.1.2 All components of the carbon dioxide fire extinguishing system should be suitable for their intended use.
4.2 System Design
4.2.1 The design of the carbon dioxide fire extinguishing system should be in accordance with the relevant regulations of GB 3836.1-1993 and DB 31/808-1994.
4.2.2 The design of the carbon dioxide fire extinguishing system shall take into account the special requirements of the space being protected, such as type of fire, combustible materials, dimensions and structure of the space.
4.2.3 The design of the carbon dioxide fire extinguishing system should take into account the requirements of the spillage prevention and the elimination of the explosion hazard.
4.2.4 The design of the system should consider the selection of the most appropriate components for the protection of the space.
4.3 Components
4.3.1 Cylinders
4.3.1.1 Cylinders used in carbon dioxide fire extinguishing systems shall meet the requirements of GB/T 10157-2003.
4.3.1.2 Cylinders should be designed to allow nitrogen to be easily injected during maintenance.
4.3.1.3 Cylinders should be identified with a clear marking indicating their type, manufacturer, serial number, working pressure, and date of manufacture.
4.3.2 Generators
4.3.2.1 Carbon dioxide generators used in carbon dioxide fire extinguishing systems shall meet the requirements of GB/T 10156-2003.
4.3.2.2 Generators shall be provided with safety devices to protect against excessive pressure or temperature and shall have a manual override facility.
4.3.2.3 Generators should be identified with a clear marking indicating the type, manufacturer, serial number, working pressure, and date of manufacture.
4.3.3 Tanks and Piping
4.3.3.1 Tanks used in carbon dioxide fire extinguishing systems shall meet the requirements of GB/T 10158-2003.
4.3.3.2 Piping used in carbon dioxide fire extinguishing systems shall meet the requirements of GB/T 10159-2003.
4.3.3.3 Tanks and pipelines shall be clearly marked, indicating their type and size.
4.3.4 Valves
4.3.4.1 Carbon dioxide valves used in carbon dioxide fire extinguishing systems shall meet the requirements of GB/T 10160-2003.
4.3.4.2 Valves should be provided with appropriate safety devices to ensure the safety of personnel and equipment.
4.3.5 Nozzles
4.3.5.1 Carbon dioxide nozzles used in carbon dioxide fire extinguishing systems shall meet the requirements of GB/T 10161-2003.
4.3.5.2 Nozzles shall be provided with appropriate safety devices to prevent the escape of carbon dioxide in the event of nozzle failure.
5. Testing
5.1 All components of the carbon dioxide fire extinguishing system shall be tested in accordance with the relevant regulations of GB/T 10157-2003, GB/T 10158-2003, GB/T 10159-2003, GB/T 10160-2003, and GB/T 10161-2003.
5.2 All components of the carbon dioxide fire extinguishing system shall be tested for leakage before installation.
5.3 The pressure relief devices of all components of the carbon dioxide fire extinguishing system shall be tested for proper operation after installation.
6. Installation
6.1 Installation of the carbon dioxide fire extinguishing system shall comply with the requirements of GB 3836.1-1993 and DB 31/808-1994.
6.2 All parts of the carbon dioxide fire extinguishing system shall be correctly connected and tested for leakage before being put into service.
6.3 The pressure relief devices of all components of the carbon dioxide fire extinguishing system shall be tested after installation.
7. Operation
7.1 The carbon dioxide fire extinguishing system shall be operated and maintained in accordance with the manufacturers instructions.
7.2 The carbon dioxide fire extinguishing system shall be inspected and maintained in accordance with the requirements of GB 3836.1-1993 and DB 31/808-1994.
7.3 The pressure relief devices of all components of the carbon dioxide fire extinguishing system shall be tested regularly.
7.4 The extinguishing agent of the system shall be regularly checked to ensure that it is full.
8. Marking
8.1 All components of the carbon dioxide fire extinguishing system shall be marked with the manufacturer’s name, model number and date of manufacture.
8.2 The carbon dioxide fire extinguishing system as a whole shall be marked with the designation of the system, operating temperature range and rated working pressure.
9. Documentation
9.1 A complete set of documents should be provided for the installation and operation of the system, including system drawings, operation and maintenance manuals, and other documents.
10. Safety
10.1 All components of the carbon dioxide fire extinguishing system shall be provided with safety devices according to their operating conditions.
10.2 Proper protective measures should be taken when working in areas where carbon dioxide is present.
10.3 Special training shall be provided for personnel who operate and maintain the system.
This is the end of the standard.
