GBJ 84-1985 Design specification for automatic sprinkler fire extinguishing system GBJ84-85
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Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Design Specification for Automatic Sprinkler Fire Extinguishing System
1986Beijing
Engineering Construction Standard Full-text Information System
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National Standard of the People's Republic of China
Design Specification for Automatic Sprinkler Fire Extinguishing System
GBJ84—85
Editor Department: Ministry of Public Security of the People's Republic of China Approval Department: China State Planning Commission of the People's Republic of China Effective Date: July 1, 1986
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Notice on the Release of
"Design Specifications for Automatic Sprinkler Fire Extinguishing Systems" Planning Standards [1985] No. 2033
According to the requirements of the National Planning Commission's Planning Standards [1984] No. 10 notification, the "Design Specifications for Automatic Sprinkler Fire Extinguishing Systems" edited by the Ministry of Public Security has been reviewed by relevant departments. The "Design Specifications for Automatic Sprinkler Fire Extinguishing Systems" GBJ84-85 is now approved as a national standard and will be implemented from July 1, 1986. This specification is managed by the Ministry of Public Security, and its specific interpretation and other work are the responsibility of the Sichuan Fire Science Research Institute of the Ministry of Public Security.
State Planning Commission
December 6, 1985
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Preparation Instructions
This specification is prepared by a compilation team composed of seven units, including the Sichuan Provincial Public Security Department, Beijing Architectural Design Institute, Urban and Rural Construction and Environmental Protection Ministry Architectural Design Institute, China Construction Southwest Design Institute, Sichuan Provincial Architectural Survey and Design Institute, and the Sichuan and Tianjin Fire Research Institutes of the Ministry of Public Security, in accordance with the notice of the State Planning Commission's [1984] No. 10 document. This specification is divided into seven chapters and three appendices, including general provisions, basic provisions for the danger level of buildings and structures and design data of automatic sprinkler fire extinguishing systems, fire water supply, sprinkler layout, system components, system types and hydraulic calculations. During the compilation process, we followed the relevant principles and policies of national capital construction and the fire protection work principle of "prevention first, prevention and control combined", conducted investigations and studies, and summarized the practical experience of automatic sprinkler fire extinguishing system design: absorbed relevant scientific research results, referred to the design, installation standards and materials of automatic sprinkler fire extinguishing systems in the United Kingdom, the United States, Japan, Federal Germany, the Soviet Union and other countries, and solicited opinions from relevant provinces, autonomous regions, municipalities directly under the Central Government and some ministries and commissions, design, scientific research, colleges and universities, and public security fire protection units, discussed and revised repeatedly, and finally reviewed and finalized with relevant departments. In the process of implementation, all units are requested to combine engineering practice, pay attention to summarizing experience, and accumulate information. If any modification or supplement is found, please send the relevant information and opinions to the Sichuan Fire Science Research Institute of the Ministry of Public Security (Guan County, Sichuan Province) for further revision in the future. Ministry of Public Security
November 1985
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Chapter 1
Chapter 2
Chapter 3
Section 1
Section 2
Chapter 4
Section 1
Section 2
Section 3
Section 4
Chapter 5
Section 1
Section 2
Section 3
Section 4
Chapter 6
Section 1||tt| |Section 2
Section 3
Section 4
Section 5
Chapter 7
Section 1
Section 2
Rules.····
****(1)
Basic provisions for the hazard level of buildings and structures and the design data of automatic sprinkler fire extinguishing systems
Fire water supply
General provisions
Fire pools and fire water tanks
Sprinkler layout
-General provisions
Sprinkler layout in warehouses
ttt++t
Sprinklers in stages, ceilings, etc. Arrangement
Sidewall sprinkler arrangement
System components
Valves and inspection and alarm devices
Monitoring devices:
System type
Wet sprinkler system
Dry sprinkler system
Pre-action sprinkler system
Drench sprinkler system
Water curtain system.…
Hydraulic calculation
Design flow and pipeline hydraulic calculation·
Pressure reducing orifice and throttling pipe
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Appendix—
Appendix II
Appendix III
Term Explanation
.........
Examples of Danger Levels of Buildings and Structures
Term Explanation of Terms Used in This Code
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Chapter I General
Article 1.0.1 In order to safeguard the safety of socialist construction and the lives and property of citizens, implement the principle of "prevention first, prevention and control combined", rationally design automatic sprinkler fire extinguishing systems, and reduce fire hazards, this code is specially formulated. Article 1.0.2 The design of automatic sprinkler fire extinguishing systems should be based on the functions of buildings and structures, fire hazards, and local climatic conditions. The type of sprinkler fire extinguishing system should be reasonably selected to ensure safety, economic rationality, and advanced technology. Article 1.0.3 This code applies to automatic sprinkler fire extinguishing systems installed in buildings and structures.
This code does not apply to automatic sprinkler fire extinguishing systems installed in buildings and structures with special requirements such as gunpowder, explosives, ammunition, and pyrotechnics factories. Article 1.0.4 The design of automatic sprinkler fire extinguishing systems, in addition to complying with the provisions of this code, shall also comply with the requirements of the relevant current national design standards and specifications. Engineering Construction Standard Full Text Information System
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Chapter 2 Danger Level of Buildings and Structures and Basic Provisions of Data for Design of Automatic Sprinkler Fire Extinguishing System
Article 2.0.1 The danger level of buildings and structures equipped with automatic sprinkler fire extinguishing system shall be divided into the following three levels according to factors such as fire danger, amount of combustibles, heat released per unit time, fire spread speed and difficulty of fire fighting: 1. Severe danger level: buildings and structures with high fire danger, many combustibles, high heat, fierce combustion and rapid spread; 2. Medium danger level: buildings and structures with high fire danger, many combustibles, medium heat and no rapid combustion in the early stage of fire; 3. Light danger level: buildings and structures with low fire danger, small amount of combustibles and low heat.
For examples of danger levels, please see Appendix 2.
Article 2.0.2 The design water spray intensity, effective area and nozzle working pressure of the automatic sprinkler fire extinguishing system of buildings and structures of various danger levels shall comply with the following provisions:
The basic design data of wet sprinkler fire extinguishing system, dry sprinkler fire extinguishing system and pre-action sprinkler fire extinguishing system shall not be less than the provisions of Table 2.0.2. Article 2.0.3 The water consumption of the water curtain system shall meet the following requirements: 1. When the water curtain is used for protection or in conjunction with the fire curtain and fire roll for fire partition, its water consumption shall not be less than 0.5 liters/second·meter; 2. The water consumption of the stage entrance, the opening with an area of more than 3 square meters and the water curtain of the fire curtain belt shall not be less than 2 liters/second·meter. Engineering Construction Standard Full-text Information System
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Basic data items for the design of three types of automatic sprinkler fire-extinguishing systems
Buildings and structures
Danger level
Production buildings
Storage buildings
Danger level
Light hazard level
Design water spray intensity
(L/min·m)
Effective area
Nozzle working pressure
(Pascal)
Note: The minimum working pressure of the sprinkler at the most unfavorable point should not be less than 4.9×104 Pascal (0.5 kg/cm).
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Chapter III Fire Water Supply
Section 1 General Provisions
Article 3.1.1 The water for the automatic sprinkler fire extinguishing system can be supplied by the outdoor water supply network, fire water pool or natural water source. When using natural water sources, the fire water supply at the lowest water level during the dry season should be ensured. When using surface water such as rivers and ponds as water sources, measures should be taken to prevent impurities from clogging the system.
Article 3.1.Article 2 The automatic sprinkler system should take measures to prevent water supply interruption due to freezing.
Article 3.1.3 The automatic sprinkler system should be equipped with water pump couplings, the number of which should be determined according to the water consumption of the automatic sprinkler system, but should not be less than two. The flow rate of each water pump coupling should be calculated at 10 to 15 liters per second. The water pump coupling should be located at a location that is convenient for connection to the fire truck, and an outdoor fire hydrant or fire pool should be set up within 15 to 40 meters around it. Section 2 Fire Pools and Fire Water Tanks
Article 3.2.1 Buildings and structures equipped with automatic sprinkler systems should be equipped with fire pools when one of the following conditions occurs: 1. The outdoor water supply pipeline and natural water source cannot meet the water consumption for fire fighting; 2. The outdoor water supply pipeline is branch-shaped or has only one water inlet pipeline. Article 3.2.2 The capacity of the fire water pool of the automatic sprinkler fire extinguishing system shall be calculated based on the duration of the fire of not less than 1 hour. However, if the water source can be continuously replenished in the event of a fire, the capacity of the pool can be reduced by the amount of water continuously replenished during the duration of the fire. When fire water and other water use the same pool or water tank, technical measures should be taken to ensure the water for fire fighting.
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Article 3.2.3 When the automatic sprinkler fire extinguishing system adopts a temporary high-pressure water supply system, a fire water tank should be installed, and its capacity should be calculated based on the indoor fire water consumption for 10 minutes, but it may not exceed 18 cubic meters.
Article 3.2.4 The automatic sprinkler fire extinguishing system may not be equipped with a fire water tank if any of the following conditions exist:
1. The water source can guarantee the water volume and water pressure requirements of the system; 2. The buildings and structures of light and medium hazard levels are equipped with a pressure-stabilizing water pump or a pneumatic water supply device.
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Chapter 4
Sprinkler Arrangement
Section 1 General Provisions
Article 4.1.1 The protection area of each standard sprinkler, the distance between sprinklers, and the distance between sprinklers and walls and columns of the automatic sprinkler fire extinguishing system of buildings and structures of various hazard levels shall comply with the provisions of Table 4.1.1. Protection area and spacing of standard sprinklers
Hazards of buildings and structures
Production buildings
Storage buildings
Hazard level
Minor hazard level
Maximum protection area of each sprinkler
(m2)
Maximum horizontal spacing of sprinklers
(m)
Maximum spacing between sprinklers and walls and columns
Article 4.1.2 The distance between the splash plate of the sprinkler and the ceiling, floor slab, and roof panel should not be less than 7.5 cm and should not be greater than 15 cm. When the floor slab and roof panel are non-combustible bodies with a fire resistance limit equal to or greater than 0.50 hours, the distance should not be greater than 30 cm. Note: Ceiling sprinklers are not subject to the above distance restrictions. Article 4.1.3 The sprinklers arranged under the sloped roof panels and ceilings shall be perpendicular to the slope, and their spacing shall be calculated according to the horizontal projection. When the slope of the roof panel is greater than 1:3 and there are no sprinklers within 75 cm from the ridge, an additional row of sprinklers shall be installed at the ridge. Article 4.1.4 When the sprinkler splash plate is arranged near the side of the beam, the distance between the sprinkler and the beam edge shall be determined in accordance with the requirement of not affecting the spraying area. Engineering 6 Construction Standard Full Text Information System
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