GB 25972-2010 English PDF (GB25972-2010)

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GB 25972-2010: Gas fire extinguishing systems and components
GB 25972-2010
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 13.220.10
C 84
Gas fire extinguishing systems and components
ISSUED ON. JANUARY 10, 2011
IMPLEMENTED ON. JUNE 01, 2011
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 5 
1 Scope ... 6 
2 Normative references ... 6 
3 Terms and definitions ... 7 
4 Model preparation method... 9 
5 Requirements ... 10 
6 Test methods ... 41 
7 Inspection rules ... 71 
8 Preparation requirements for instruction manual ... 78 
9 Fire extinguishing agent filling ... 78 
Appendix A (Informative) Part number preparation method ... 80 
Appendix B (Informative) Fire extinguishing concentration for category B n-
heptane fire and category A wood pile surface fire ... 82 
Appendix C (Informative) Test method for fire extinguishing concentrations for
putting out category B n-heptane fires and category A wood pile surface fires
... 83 
Appendix D (Normative) System test procedure and sample quantity ... 89 
Appendix E (Normative) Test procedure and sample quantity for fire
extinguishing agent cylinder group ... 90 
Appendix F (Normative) Test procedure and sample quantity for driving gas
cylinder group ... 92 
Appendix G (Normative) Container test procedure and sample quantity ... 93 
Appendix H (Normative) Container valve test procedure and sample quantity
... 94 
Appendix I (Normative) Nozzle test procedure and sample quantity ... 96 
Appendix J (Normative) Selection valve test procedure and sample quantity 98 
Appendix K (Normative) One-way valve test procedure and sample number
... 100 
Appendix L (Normative) Header pipe test procedure and sample quantity .. 102 
Appendix M (Normative) Connection pipe test procedure and sample quantity
... 103 
Appendix N (Normative) Safety venting device test procedure and sample
quantity ... 104 
Appendix P (Normative) Drive device test procedure and sample quantity.. 106 
Appendix Q (Normative) Control panel test procedure and sample quantity 107 
Appendix R (Normative) Weighing device test procedure and sample quantity
... 108 
Appendix S (Normative) Pressure display test procedure and sample quantity
... 109 
Appendix T (Normative) Level measuring device test procedure and sample
quantity ... 111 
Appendix U (Normative) Signal feedback device test procedure and sample
quantity ... 112 
Appendix V (Normative) Pipeline, fitting test procedure and sample quantity
... 114 
Appendix W (Normative) Hook, bracket test procedure and sample quantity
... 115 
Appendix Y (Normative) Decompression device test procedure and sample
quantity ... 116 
Appendix Z (Normative) Low venting high close valve test procedure and
sample quantity ... 117 
Gas fire extinguishing systems and components
1 Scope
This standard specifies the terms and definitions, the method of formulating the
model, the requirements, the test method, the inspection rules, the
requirements for the preparation of the operating instructions, and the fire
extinguishing agent filling requirements of the gas fire extinguishing system and
its components.
This standard applies to heptafluoropropane (HFC227ea) fire extinguishing
system, trifluoromethane (HFC23) fire extinguishing system, inert gas fire
extinguishing system [including. lG01 (argon) fire extinguishing system, lG100
(nitrogen) fire extinguishing system, IG55 (argon, nitrogen) fire extinguishing
system, IG541 (argon, nitrogen, and carbon dioxide) fire extinguishing system.
2 Normative references
The provisions in following documents become the provisions of this standard
through reference in this standard. For the dated references, the subsequent
amendments (excluding corrections) or revisions do not apply to this standard;
however, parties who reach an agreement based on this standard are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
GB 150 Steel pressure vessels
GB 5099 Seamless steel gas cylinder (GB 5099-1994, neq ISO 4705.1983)
GB 5100 Welded steel gas cylinders (GB 5100-1994, neq ISO 4706.1989)
GB/T 8979 Pure nitrogen and high purity nitrogen and ultra-pure nitrogen
GB/T 9969 General principles for preparation of instructions for use of
industrial products
GB 18614 Fire extinguishing agent - Heptafluoropropane (HFC227ea)
GB 20128 Inert fire extinguishing agent (GB 20128-2006, ISO 14520.2005,
NEQ)
GA 61 General technical specifications of actuating and control devices of
fixed extinguishing systems
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
System working pressure
Pressure at the outlet of the fire extinguishing agent cylinder group container
valve.
Note. If the container valve on the fire extinguishing agent cylinder group
does not have a decompression function, the working pressure of the system
is the working pressure of the cylinder group.
If the container valve on the fire extinguishing agent cylinder group has a
decompression function, the working pressure of the system is the pressure
at the outlet of the container valve after decompression.
3.2
Filling density
The ratio of the mass of the fire extinguishing agent in the storage container
to the volume of the container, in kilograms per cubic meter (kg/m3).
3.3
Compressed inert gaseous fire extinguishing system
The fire extinguishing system in which the fire extinguishing agent in the
extinguishing agent cylinder group is delivered by its own pressure.
3.4
Stored pressure gaseous fire extinguishing system
The fire extinguishing system in which the fire extinguishing agent is
pressurized and stored in the cylinder group with inert gas, and the fire
extinguishing agent in the cylinder group is delivered by the pressurized gas
in the cylinder group when the system operates.
3.5
Storage pressure
For a compressed inert gaseous fire extinguishing system, it refers to the
equilibrium pressure in an environment of +20 °C of the filled fire
other components.
5.1.2.3 All parts of the same system shall be fixed firmly and connected reliably,
the parts are installed in the correct position, the overall layout is reasonable,
and it is easy to operate, check and maintain.
5.1.2.4 The specifications of the same functional components in the system
shall be the same (except for selection valves and nozzles). The volume, filling
density or filling pressure of each fire extinguishing agent storage container
shall be the same.
5.1.3 Appearance
5.1.3.1 The components of the system shall be free from obvious processing
defects or mechanical damage. The external surfaces of the components shall
be subject to anti-corrosion treatment. The anti-corrosion coating and plating
shall be complete and uniform.
5.1.3.2 The name of the fire extinguishing agent shall be marked on the
extinguishing agent storage container, the handwriting shall be clear and legible.
The name of the filling gas shall be marked on the driving gas storage container.
5.1.3.3 Each manually operated part of the system shall be marked with text
and graphic symbols to indicate the operation method.
5.1.3.4 The system nameplate shall be firmly set on the obvious part of t...