GB 25972-2010 English PDF

Delivery: 2 working-hours manually (Sales@ChineseStandard.net)
Need delivered in 3-second? USA-Site: GB 25972-2010
Get Quotation: Click GB 25972-2010 (Self-service in 1-minute)
Historical versions (Master-website): GB 25972-2010
Preview True-PDF (Reload/Scroll-down if blank)

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 the
system, indicating. system name, model specification, implemented standard
code, fire extinguishing agent filling total mass, working temperature range,
production unit, product number, exit-factory date, etc.
5.1.3.5 The system warning sign shall be firmly set in the obvious part of the
system. The content of the warning sign for the inert gas fire extinguishing
system is that ?€?The nozzle will emit high-pressure gas when the system is in
operation?€?; for the heptafluoropropane fire extinguishing system and the
trifluoromethane extinguishing system, the content of the warning sign is that
?€?The system will decompose and produce a certain amount of hydrogen fluoride
gas when it extinguishes fire?€?. The contents of the warning sign shall be clearly
readable under the general lighting conditions at a distance of 3 m from the sign.
5.1.4 System quasi-working status
The working positions of the operating parts of the system, the control and
monitoring functions of the control panel shall all be in the normal quasi-working
state; the leak detection devices of each cylinder group shall be in normal
working condition, and the filling mass of the medium in the cylinder group
(filling pressure) shall be consistent with the nominal value on the cylinder group.
group shall not be loose, fall off or damaged. After the test, the air tightness of
the fire extinguishing agent cylinder group shall comply with the provisions of
5.2.4, the container valve shall be able to open normally in case of automatic
and manual startup.
5.2.9 Siphon
For fire extinguishing agent cylinder group with siphons, the siphon shall be
made of a metal material that can resist corrosion by the fire extinguishing agent.
5.2.10 Incorrect discharge protection device
The fire extinguishing agent cylinder group shall have a protective device at the
container valve outlet for preventing the accidental discharge of the fire
extinguishing agent during the transportation, loading and unloading, and
storage. The opening on the protective device shall enable the fire extinguishing
agent to be uniformly sprayed without generating excessive recoil force. And
shall not be charged out.
5.2.11 Gas sampling requirements
Fire extinguishing agent cylinder group (on container or container valve) shall
be equipped with fire extinguishing agent sampling port, and the fire
extinguishing agent shall be able to be drawn from the cylinder group without
opening the container valve or fully opening the container valve (it can still be
closed after the sampling of fire extinguishing agent).
5.2.12 Fire extinguishing agent release time
At the maximum filling density or filling pressure of the fire extinguishing agent
cylinder group, the discharge time of the fire extinguishing agent from the
container valve shall be not more than 80% of the system discharge time as
specified in 5.1.1.3.
5.2.13 Fire extinguishing agents and pressurized gas requirements
Heptafluoropropane fire extinguishing agent shall meet the requirements of GB
18614.
The inert gas extinguishing agent shall meet the requirements of GB 20128.
Other fire extinguishing agents shall be products announced by the public
security department of the State Council.
The pressurized gas shall be pure nitrogen and shall meet the requirements of
GB/T 8979.
5.2.14 Signs
5.5.10.1 Salt spray corrosion resistance
The salt spray corrosion test shall be carried out in accordance with the method
specified in 6.9, the container valve and its accessories shall not have obvious
corrosion damage. After the test, the sealing performance of the container valve
shall comply with the provisions of 5.5.5. When the working reliability is tested
in accordance with the provisions of 6.6.1, it shall be able to open accurately
and reliably.
5.5.10.2 Stress corrosion resistance
The stress corrosion test shall be carried out in accordance with the method
specified in 6.11. The container valve and its accessories shall not be cracked
or damaged. The strength of the container valve after the test shall comply with
the provisions of 5.5.4.
5.5.10.3 Sulfur dioxide corrosion resistance
Sulfur dioxide corrosion test shall be carried out in accordance with the method
specified in 6.10. The container valve and its accessories shall not have obvious
corrosion damage. After the test, the container valve sealing performance shall
comply with the provisions of 5.5.5. When the working reliability is tested in
accordance with the provisions of 6.6.1, it shall be able to open accurately and
reliably.
5.5.11 Manual operation requirements
The container valve shall have a mechanical emergency startup function.
Perform an emergency manual startup operation test in accordance with the
method specified in 6.16. The following requirements shall be met.
a) The manual operating force shall not exceed 150 N;
b) The finger pulling operation force shall not exceed 50 N;
c) The finger pushing operation force shall not exceed 10 N;
d) All manual operation displacement shall not exceed 300 mm;
e) The operating torque for rotary opening the container valve shall not
exceed 10 N ?€? m and the rotation angle shall not exceed 27??.
5.5.12 Structural requirements
A one-way needle valve should be installed at the pressure monitor mounting
port for the container valve which is equipped with the pressure display.
5.6 Nozzle
The test pressure is the maximum working pressure of the system and the
pressure holding time is 5 mm.
5.7.6 Working reliability requirements
The working reliability test is carried out in accordance with the method
specified in 6.6.1. The selection valve and its auxiliary control drive shall be
flexible and reliable, and shall not cause any failure or structural damage
(except for parts that are allowed to be damaged during normal operation).
5.7.7 Local resistance loss
The local resistance loss of the selection valve of the heptafluoropropane fire
extinguishing system and the trifluoromethane fire extinguishing system is
expressed by the equivalent length of the connected pipeline. The difference
between the equivalent length of the selection valve measured by the test
method specified in 6.8.1 and the published value in the manufacturer's
instructions shall not exceed 10% of the published value in the operating
instructions.
The local resistance loss of the inert gas fire extinguishing system is
represented by the pressure loss curve. The difference between the pressure
loss curve measured by the test method specified in 6.8...