This specification is applicable to the design of carbon dioxide fire extinguishing systems installed in new construction, reconstruction, expansion projects and production and storage facilities. GB 50193-1993 Carbon dioxide fire extinguishing system design specification GB50193-1993 standard download decompression password: www.bzxz.net

Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
GB50193—93
Code of design for carbon
dioxide fire extinguishing systems (1999 edition)
1993-12-21
State Bureau of Technical Supervision
Ministry of Construction of the People's Republic of China
Engineering Construction Standard Full-text Information System
1994-08-01
Jointly issued
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Code of design for carbon
dioxide fire extinguishing systems systemsGB50193—93
(1999 edition)
Editing department: Ministry of Public Security of the People's Republic of ChinaApproving department: Ministry of Construction of the People's Republic of ChinaImplementation date: August 1, 1994
2000 Beijing
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Partial Revision Announcement
No. 23
The national standard "Design Specification for Carbon Dioxide Fire Extinguishing System" GB5019393 has been partially revised by the Tianjin Fire Science Research Institute of the Ministry of Public Security in conjunction with relevant units. It has been reviewed by the relevant departments and the partially revised provisions are now approved for implementation on March 1, 2000. The provisions of the corresponding provisions in the specification will be repealed at the same time. Ministry of Construction of the People's Republic of China
November 17, 1999
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Notice on the Release of the National Standard "Design Specifications for Carbon Dioxide Fire Extinguishing Systems"
Jianbiao [1993] No. 899
According to the requirements of the State Planning Commission's Document No. Jizong [1987] 2390, the "Design Specifications for Carbon Dioxide Fire Extinguishing Systems" jointly formulated by the Ministry of Public Security and relevant departments has been reviewed by relevant departments. The "Design Specifications for Carbon Dioxide Fire Extinguishing Systems" GB50193-93 is now approved as a mandatory national standard and will be implemented from August 1, 1994. The Ministry of Public Security is responsible for the management of this standard, and its specific interpretation and other work are the responsibility of the Tianjin Fire Science Research Institute of the Ministry of Public Security. The publication and distribution is organized by the Standard and Quota Research Institute of the Ministry of Construction.
Ministry of Construction of the People's Republic of China
December 21, 1993
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
2 Terms and Symbols
3 System Design
General Provisions
3.2 Total Flooding Fire Extinguishing System
3.3 Local Application Fire Extinguishing System
4 Pipe Network Calculation
System Components
5.1 Storage Devices
5.2 Selector Valves and Sprinklers
5.3 Pipes and Accessories
6 Control and Operation
Safety Requirements
+++...o+.++..++++++++++++.++..+.+.Special Electricity
00000000000001000008||tt| |Specialized electrical equipment and professional electrical equipment Appendix A Material coefficient, design concentration and suppression time Appendix B Equivalent length of pipeline accessories
Appendix C
Pipeline pressure drop
Appendix D
Appendix E
Appendix F
Appendix G
Appendix H
Appendix J
Y value and Z value of carbon dioxide
Elevation correction system Number
.......
Nozzle inlet pressure and injection rate per unit area, wording in this specification
Nozzle equivalent orifice size
Carbon dioxide fire extinguishing system piping specifications
Engineering Construction Standard Full Text Information System
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Engineering Construction Standard Full Text Information System
Additional Notes
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Engineering Construction Standard Full Text Information System
66000060500066500000650c066eiEngineering Construction Standard Full Text Information System
1.0.1 This specification is formulated to reasonably design carbon dioxide fire extinguishing systems, reduce fire hazards, and protect personal and property safety. 1.0.2 This specification is applicable to the design of carbon dioxide fire extinguishing systems installed in new, rebuilt, and expanded projects and production and storage facilities. 1.0.3 The design of carbon dioxide fire extinguishing systems should actively adopt new technologies, new processes, and new equipment to ensure safety, applicability, advanced technology, and economic rationality. Carbon dioxide fire extinguishing systems can be used to extinguish the following fires: 1.0.4
1 Gas fires where the gas source can be cut off before extinguishing the fire. 1.0.4.1
1.0.4.2 Fires of liquids or meltable solids such as paraffin and asphalt. 1.0.4.3 Fires on solid surfaces and deep-seated fires of some solids such as cotton wool, fabrics, and paper.
1.0.4.4 Electrical fires.
Carbon dioxide fire extinguishing systems shall not be used to extinguish the following fires: 1.0.5
1 Fires of chemicals containing oxidants such as nitrocellulose and gunpowder. 1.0.5.1
1.0.5.2 Fires of active metals such as potassium, sodium, magnesium, titanium, and zirconium. 1.0.5.3 Fires of metal hydrides such as potassium hydride and sodium hydride. In addition to complying with the provisions of this Code, the design of carbon dioxide fire extinguishing systems shall also 1.0.6
comply with the provisions of the current relevant national standards. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
2 Terms and Symbols
2.1 Terms
2.1.1 Total flooding extinguishing system A fire extinguishing system that sprays a certain concentration of carbon dioxide into the protected area within a specified time and evenly fills the entire protected area. 2.1.2 Local application extinguishing system A fire extinguishing system that directly sprays carbon dioxide at a designed injection rate to the protected object for a certain period of time.
2.1.3 Protected area
protectedarea
An enclosed space that can meet the application conditions of the carbon dioxide total flooding fire extinguishing system and is protected by it.
2.1.4 Combined distribution systems
combined distribution systems A fire extinguishing system that uses a set of carbon dioxide storage devices to protect two or more protected areas or protected objects.
2.1.5Flame extinguishing concentration
The minimum volume percentage of carbon dioxide in a mixture of air and carbon dioxide required to extinguish a certain fire under 101kPa atmospheric pressure and specified temperature conditions. 2.1.5A Design concentration designconcentrationThe concentration used for engineering design obtained by multiplying the extinguishing concentration by 1.7. 2.1.6Inhibition time inhibitiantime
The time required to completely extinguish a deep-seated solid fire by maintaining the specified carbon dioxide concentration in the design.
2.1.7Pressure relief openingAn opening located on the outer wall or top of the protection zone to release the overpressure inside the protection zone. 2.1.8Equivalent orifice areaequivalentorificearea2
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
The nozzle orifice area converted with the standard nozzle orifice area with a water flow coefficient of 0.98.
2.1.9Filling factor
filingfactor
The ratio of the mass of carbon dioxide in the storage container of the high-pressure system to the volume of the container. 2.1.9A loading factor loading factor
The ratio of the volume of liquid carbon dioxide in the storage container of the low-pressure system to the volume of the container.
Material factor
Material factor
The conversion factor of the design concentration of carbon dioxide in the combustible to the concentration of carbon dioxide of 34%.
High-pressure factor
high-pressure system
A carbon dioxide fire extinguishing system in which the extinguishing agent is stored at room temperature. 2 Low-pressure factor low-pressuresvstem
A carbon dioxide fire extinguishing system in which the extinguishing agent is stored at a low temperature of -18-20℃. 2.1.13 Homogeneous flow equilibrium flow
Two-phase flow in which the gas phase and the liquid phase are uniformly mixed. 2.2 Conformity
2.2.1 Geometric parameters conformity
A—converted area;
A——total opening area;
4——area of ​​actual enclosures such as solid walls existing in the assumed enclosure;A——the area of ​​the side enclosures of the assumed enclosure;A——the total internal surface area of ​​the inner side, bottom and top surfaces (including the openings therein) of the protection zone;
pressure relief port area,
——inner diameter of the pipe;
——equivalent orifice area of ​​the nozzle;
L—calculated length of the pipe;| |tt||Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
The side length of the square protection area of ​​a single sprinkler; 4
The distance that the aiming point deviates from the center of the sprinkler protection area; N
The number of sprinklers;
The number of sprinklers installed downstream of the calculated branch pipe flow; N
The number of storage containers of the high-pressure system;
The net volume of the protection area;
The volume of a single storage container;
The volume of the pipeline;
V. The total volume of non-combustible and difficult-to-burn bodies in the protection zone; V,——the volume of the i-th section of the pipeline in the pipeline network; V,——the calculated volume of the protected object,
V,——the volume of the protection zone;
——the nozzle installation angle; www.bzxz.net
physical parameters conform to the specific heat of the metal material of the pipeline;
latent heat of evaporation of carbon dioxide;
——area coefficient;
Kz——volume coefficient,
Ks—material coefficient;
K—pipe diameter coefficient;
elevation correction coefficient;
Km—margin coefficient;
M—designed amount of carbon dioxide; ||t t||-Carbon dioxide storage capacity,
Mpipeline mass;
MResidual amount of carbon dioxide in the pipeline;
M,-Residual amount of carbon dioxide in the storage container; M
-Evaporation amount of carbon dioxide in the pipeline; Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
P——Average pressure in the i-th section of the pipeline; P——Node pressure;
-Allowable pressure of the enclosing structure;
QDesign flow rate of the pipeline;
Q——Design flow rate of a single nozzle;
-Carbon dioxide injection rate,
9. ——Injection rate per unit equivalent orifice area; Injection rate per unit volume;
Average temperature of the pipeline before carbon dioxide injection; - Average temperature of carbon dioxide;
- Injection time;
ta—Delay time;
- Pressure coefficient;
- Density coefficient;
Filling coefficient;
- Average density of carbon dioxide in the i-th section of the pipeline. Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
3 System Design
3.1 General Provisions
3.1.1 Carbon dioxide fire extinguishing systems can be divided into total flooding fire extinguishing systems and local application fire extinguishing systems according to their application methods. Total flooding fire extinguishing system is used to extinguish fire in enclosed space. Local application fire extinguishing system is used to extinguish non-deep fire of specific protection objects that do not require enclosed space conditions.
3.1.2 The protection area using total flooding fire extinguishing system shall comply with the following provisions: 3.1.2.1 For gas, liquid, electrical fire and solid surface fire, the area of ​​openings that cannot be automatically closed before spraying carbon dioxide should not be greater than 3% of the total internal surface area of ​​the protection area, and the openings should not be located on the bottom surface.
3.1.2.2 For solid deep fire, openings other than pressure relief ports should be automatically closed before spraying carbon dioxide.
3.1.2.3 The fire resistance limit of the enclosure structure, doors and windows of the protection area should not be less than 0.50h, and the fire resistance limit of the ceiling should not be less than 0.25h; the allowable pressure of the enclosure structure and doors and windows should not be less than 1200Pa.
3.1.2.4 The ventilator used in the protection area and the fire damper in the ventilation duct should be automatically closed before spraying carbon dioxide.
3.1.3 The objects protected by the local application fire extinguishing system shall comply with the following provisions: 3.1.3.1 The air flow speed around the protected object should not be greater than 3m/s. If necessary, wind blocking measures should be taken.
3.1.3.2 There should be no obstructions between the nozzle and the protected object within the nozzle spray angle range.
3 When the protected object is a flammable liquid, the distance from the liquid surface to the edge of the container shall not be less than 150mm.
3.1.4 Before or at the same time as the release of carbon dioxide is started, the combustible and combustion-supporting gases must be cut off.—Residual amount of carbon dioxide in the storage container; M
-evaporation amount of carbon dioxide in the pipeline; Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
P——average pressure in the i-th section of the pipeline; P——node pressure;
-allowable pressure of the enclosure structure;
QDesign flow rate of the pipeline;
Q——design flow rate of a single nozzle;
-carbon dioxide injection rate,
9. ——Injection rate per unit equivalent orifice area; Injection rate per unit volume;
Average temperature of the pipeline before carbon dioxide injection;-average temperature of carbon dioxide;
-Injection time;
ta—delay time;
-pressure coefficient;
-density coefficient;
Filling coefficient;
-average density of carbon dioxide in the i-th section of the pipeline. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
3 System Design
3.1 General Provisions
3.1.1 Carbon dioxide fire extinguishing systems can be divided into full flooding fire extinguishing systems and local application fire extinguishing systems according to the application method. Full flooding fire extinguishing systems are used to extinguish fires in enclosed spaces. Local application fire extinguishing systems are used to extinguish non-deep fires of specific protected objects that do not require enclosed space conditions.
3.1.2 The protection area using full flooding fire extinguishing systems shall comply with the following provisions: 3.1.2.1 For gas, liquid, electrical fires and solid surface fires, the area of ​​openings that cannot be automatically closed before carbon dioxide is sprayed should not be greater than 3% of the total internal surface area of ​​the protection area, and the openings should not be located on the bottom surface.
3.1.2.2 For solid deep fires, openings other than pressure relief ports should be automatically closed before carbon dioxide is sprayed.
3.1.2.3 The fire resistance limit of the enclosure structure, doors and windows of the protection area shall not be less than 0.50h, and the fire resistance limit of the ceiling shall not be less than 0.25h; the allowable pressure of the enclosure structure, doors and windows should not be less than 1200Pa.
3.1.2.4 The fire dampers in the ventilators and ventilation ducts used in the protection area shall be automatically closed before the carbon dioxide is sprayed.
3.1.3 The objects protected by the local application fire extinguishing system shall comply with the following provisions: 3.1.3.1 The air flow speed around the protected object should not be greater than 3m/s. If necessary, wind blocking measures should be taken.
3.1.3.2 There should be no obstructions between the nozzle and the protected object within the nozzle spray angle range.
3 When the protected object is a flammable liquid, the distance from the liquid surface to the edge of the container shall not be less than 150mm.
3.1.4 Before or at the same time as starting to release carbon dioxide, the combustible and combustion-supporting gases must be cut off 6
Engineering Construction Standards Full Text Information System—Residual amount of carbon dioxide in the storage container; M
-evaporation amount of carbon dioxide in the pipeline; Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
P——average pressure in the i-th section of the pipeline; P——node pressure;
-allowable pressure of the enclosure structure;
QDesign flow rate of the pipeline;
Q——design flow rate of a single nozzle;
-carbon dioxide injection rate,
9. ——Injection rate per unit equivalent orifice area; Injection rate per unit volume;
Average temperature of the pipeline before carbon dioxide injection;-average temperature of carbon dioxide;
-Injection time;
ta—delay time;
-pressure coefficient;
-density coefficient;
Filling coefficient;
-average density of carbon dioxide in the i-th section of the pipeline. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
3 System Design
3.1 General Provisions
3.1.1 Carbon dioxide fire extinguishing systems can be divided into full flooding fire extinguishing systems and local application fire extinguishing systems according to the application method. Full flooding fire extinguishing systems are used to extinguish fires in enclosed spaces. Local application fire extinguishing systems are used to extinguish non-deep fires of specific protected objects that do not require enclosed space conditions.
3.1.2 The protection area using full flooding fire extinguishing systems shall comply with the following provisions: 3.1.2.1 For gas, liquid, electrical fires and solid surface fires, the area of ​​openings that cannot be automatically closed before carbon dioxide is sprayed should not be greater than 3% of the total internal surface area of ​​the protection area, and the openings should not be located on the bottom surface.
3.1.2.2 For solid deep fires, openings other than pressure relief ports should be automatically closed before carbon dioxide is sprayed.
3.1.2.3 The fire resistance limit of the enclosure structure, doors and windows of the protection area shall not be less than 0.50h, and the fire resistance limit of the ceiling shall not be less than 0.25h; the allowable pressure of the enclosure structure, doors and windows should not be less than 1200Pa.
3.1.2.4 The fire dampers in the ventilators and ventilation ducts used in the protection area shall be automatically closed before the carbon dioxide is sprayed.
3.1.3 The objects protected by the local application fire extinguishing system shall comply with the following provisions: 3.1.3.1 The air flow speed around the protected object should not be greater than 3m/s. If necessary, wind blocking measures should be taken.
3.1.3.2 There should be no obstructions between the nozzle and the protected object within the nozzle spray angle range.
3 When the protected object is a flammable liquid, the distance from the liquid surface to the edge of the container shall not be less than 150mm.
3.1.4 Before or at the same time as starting to release carbon dioxide, the combustible and combustion-supporting gases must be cut off 6
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