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Chinese Standard: 'GB50084-2017'
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GB 50084-2017
P GB 50084-2017
Code for design of sprinkler systems
ISSUED ON. MAY 27, 2017
Issued by. Ministry of Housing and Urban-Rural Development of PRC;
General Administration of Quality Supervision, Inspection and
Table of Contents
Foreword . 6 
1 General provisions .. 8 
2 Terminologies and symbols . 9 
2.1 Terms .. 9 
2.2 Symbols .. 12 
3 Hazard classifications of occupancies .. 15 
4 Basic requirements . 16 
4.1 General requirements . 16 
4.2 Selection of systems . 16 
4.3 Others .. 18 
5 Basic design parameters .. 19 
6 System components . 30 
6.1 Sprinklers . 30 
6.2 Alarm valve set .. 32 
6.3 Waterflow indicator .. 33 
6.4 Pressure switch . 33 
6.5 System test connection. 33 
7 Sprinklers arrangement . 35 
7.1 General requirements . 35 
7.2 Distance between sprinklers and barriers .. 40 
8 Pipe . 47 
9 Hydraulic calculation . 50 
9.1 Design flow rate of system.. 50 
9.2 Hydraulic calculation of pipes . 52 
9.3 Pressure-reducing measures . 53 
10 Water supply.. 56 
10.1 General requirements . 56 
10.2 Water pump .. 56 
10.3 Gravity tanks . 57 
10.4 Fire department connections .. 57 
11 Operation and control .. 59 
12 Local application system . 61 
Appendix A Examples of classification of occupancies .. 64 
Appendix B Examples of classifications of plastics and rubbers . 66 
Appendix C List of equivalent lengths . 67 
Appendix D Local resistance factor of pressure-reducing orifice plate .. 68 
Explanation of wording in this code . 69 
List of quoted standards . 70 
In accordance with the requirements of the Ministry of Housing and Urban-Rural
Development of the People's Republic of China on Printing and Distributing
(JIANBIAO [2008] No.102), this code was drafted by the drafting group of “Code
for design of sprinkler system” after making extensive investigation, carefully
summarizing practical experiences, making reference to relevant international
standard and overseas advanced standards, and extensive soliciting of
The revision of this standard is, in accordance with the national guidelines on
basic construction and the fire prevention policy of “prevention-oriented,
prevention-firefighting combined”, based on the scientific research
achievements, design and current situation of use of the sprinkler system in
China, after extensive solicitating the domestic opinions on such departments
as scientific research, design, production, firefighting supervision, and
universities, and at the same time making reference to the relevant standards
of the ISO, USA, UK and other developed countries, jointly reviewed and
finalized by the relevant departments.
The main technical contents of this code are. general provisions, terminologies
and symbols, hazard classification of occupancies, basic requirements, basic
design parameters, system components, sprinkler arrangement, pipe, hydraulic
calculation, water supply, operation and control, local application system, and
so on.
The main technical content of this revision of this code is.
1. REARRANGE the terms of the sprinkler system type and sprinkler type;
2. ENRICH the technical requirements for sprinkler system design in civil
buildings, warehouses and other places, ADD the technical content of the
sprinkler protection and cooling system;
3. ADD the application technical requirements for new sprinkler and pipelines,
with particular emphasis on system type selection based on setting
locations and system design based on sprinkler type;
4. MODIFY some provisions inconvenient for operation in the current code,
COORDINATE the relationship with other code.
The provisions marked in bold in this Code are mandatory provisions, which
must be strictly enforced.
As for this code, the Ministry of Housing and Urban-Rural Development and is
responsible for its management and interpretation of mandatory provisions, the
Code for design of sprinkler systems
1 General provisions
1.0.1 This code is developed to properly and reasonably design sprinkler
systems and to protect the safety of the person and property.
1.0.2 This code applies to the design of sprinkler systems in newly built,
expanded or rebuilt civil and industrial buildings.
Related standard:   GB 51324-2019  GB 51309-2018
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