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GB 50898-2013 PDF in English


GB 50898-2013 (GB50898-2013) PDF English
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GB 50898-2013: PDF in English

GB 50898-2013
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC
Technical Code for Water Mist
Fire Extinguishing System
ISSUED ON. JUNE 8, 2013
IMPLEMENTED ON. DECEMBER 1, 2013
Issued by. Ministry of Housing and Urban-Rural Development of the
People's Republic of China;
State Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China.
Announcement of the Ministry of Housing and Urban-
Rural Development of the People’s Republic of China
No. 54
Announcement of the Ministry of Housing and Urban-Rural
Development on Issuing the National Standard, Technical
Code for Water Mist Fire Extinguishing System
We hereby approve GB 50898-2013, Technical Code for Water Mist Fire
Extinguishing System, to be a national standard, which will be implemented
from December 1, 2013. Paragraphs 3.3.10, 3.3.13, 3.4.9 (1, 2, 3), 3.5.1 and
3.5.10 are compulsory provisions which shall be executed to the letter.
This Standard is published and distributed by China Planning Press under the
organization and coordination of the Institute of Standards and Quotas of the
Ministry of Housing and Urban-Rural Development.
Ministry of Housing and Urban-Rural Development
of the People’s Republic of China
June 8, 2013
Foreword
This Standard was drafted by Tianjin Fire Research Institute of the Ministry of Public
Security jointly with other organizations concerned, in accordance with the
requirements of the former Ministry of Construction, the Notice on Issuing the
Development and Amendment Plan of Engineering Construction Standards in 2007.
During the drafting of this standard, the drafting set followed the national policies
concerning capital construction and the fire protection working policy “prevention first;
combination of fire extinguishing and prevention”, solicited opinions from all sides with
in regard to design, construction, manufacture, research, education and fire
supervision based on the summary of research findings, design, construction,
acceptance and use status as well as the engineering application experiences in
regard to water mist fire extinguishing in China, and mean while studied, digested and
absorbed relevant domestic and foreign standards and the finally finalized the standard
by examination.
This Standard is divided into 6 chapters and 7 annexes, mainly including General
Provisions, Terms and Symbols, Design, Construction, Acceptance, and Maintenance
and Management and so on.
The paragraphs boldfaced in this Standard are compulsory provisions, which shall be
executed to the letter.
The Ministry of Housing and Urban-Rural Development is responsible for the
administration of this Standard and the interpretation of the compulsory provisions; the
Ministry of Public Security is responsible for the routine administration work; and Tianjin
Fire Research Institute of the Ministry of Public Security is responsible for the specific
interpretation of the compulsory provisions. Each organization is advised to sum up
experiences and collect data in the implementation of this Standard and post timely
their opinions and relevant data to Tianjin Fire Research Institute of the Ministry of
Public Security (address. No. 110 Weijinnan Road, Nankai District, Tianjin; Zip code.
300381) as the references for the amendments in the future.
The main drafting organization, participating drafting organizations, main drafters and
main examiners of this Standard.
Main drafting organization.
Tianjin Fire Research Institute of the Ministry of Public Security
Participating drafting organizations.
Institute of Engineering Design and Research of the General Reserve
Department of PLA
Beijing Public Security Fire Force
Tianjing Public Security Fire Force
Shanghai Public Security Fire Force
Guangdong Guangzhou Public Security Fire Detachment
Table of Contents
Foreword ... 4 
1 General Provisions ... 8 
2 Terms and Symbols ... 9 
2.1 Terms ... 9 
2.2 Symbols ... 10 
3 Design ... 12 
3.1 General Provisions ... 12 
3.2 Nozzle Selection and Layout... 12 
3.3 System Components and Pipes and Their Layout ... 14 
3.4 Design Parameters and Hydraulic Calculation ... 16 
3.5 Water Supply ... 23 
3.6 Control ... 25 
4 Installation ... 27 
4.1 General Provisions ... 27 
4.2 Receiving inspection ... 28 
4.3 Installation ... 30 
4.4 Debugging ... 34 
5 Acceptance ... 38 
6 Maintenance and Management ... 44 
Annex A Simulated fire Test for the Water Mist Fire Extinguishing System . 46 
A.1 General Provisions ... 46 
A.2 Equipment Rooms with the Volume not More than 260 m3 ... 46 
A.3 Equipment Rooms with the volume More than 260 m3 ... 54 
A.4 Cable Tunnels and Cable interlayers ... 62 
A.5 Floor Interlayer Space of Electronic Information System Rooms ... 66 
Annex B Project Division of the Water Mist Fire Extinguishing System ... 69 
Annex C Records of Quality Management and Inspection for the Construction
Site of the Water Mist Fire Extinguishing System ... 70 
Annex D Records of Quality Inspection of the Construction Process for the
Water Mist Fire Extinguishing System... 71 
Annex E Records of Examination of Project Quality Control Data for the Water
Mist Fire Extinguishing System ... 77 
Annex F Records of Project Acceptance for the Water Mist Fire Extinguishing
System ... 78 
Annex G Inspection Items of Maintenance and Management of the Water Mist
Fire Extinguishing System ... 79 
Explanation of Wording in This Standard ... 82 
Reference Standards ... 83 
Technical Code for Water Mist
Fire Extinguishing System
1 General Provisions
1.0.1 This Standard was drafted in order to design the water mist fire extinguishing
system in an appropriate way, ensure its construction quality, standardize its
acceptance, maintenance and management, reduce fire hazard and protect personal
and property security.
1.0.2 This Standard applies to the design, construction, acceptance and
maintenance and management of water mist fire extinguishing system provided for
construction projects.
1.0.3 The water mist fire extinguishing system applies to the extinguishing of
combustible solid surface fire, combustible liquid fire and live equipment fire in a
relatively enclosed space.
The water mist fire extinguishing system does not apply to the extinguishing of the
following fires.
1 combustible sold deep fire;
2 fire of active metals and other compounds which are capable of drastic action
with water and generate lots of hazardous substance; and
3 combustible gas fire.
1.0.4 The design of the water mist fire extinguishing system shall be based on the
functions and fire characteristics of the protection objects; effective technical measures
shall be taken in order to make it safe and reliable, advanced and economic.
1.0.5 The design, construction, acceptance and maintenance and management of
the water mist fire extinguishing system shall be as specified in relevant national
standards.
2.1.10 Response time
the time FROM the system giving a fire extinguishing command with the automatic fire
alarm system TO the water mist spraying from the nozzle at the most adverse point
2.2 Symbols
2.2.1 Flow rate
q – the design flow rate of the nozzle;
qi – the calculated design flow rate of nozzle;
Qs – the design flow rate of the system;
Q – the flow rate of the pipe;
Re – the Reynolds number;
f – the friction coefficient;
K – the flow coefficient of the nozzle;
ρ – the fluid density;
μ – the dynamic viscosity;
Δ – the relative rough...
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.