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| Standard ID | GB 25972-2024 (GB25972-2024) | | Description (Translated English) | Gas fire extinguishing systems and components | | Sector / Industry | National Standard | | Classification of Chinese Standard | C83 | | Classification of International Standard | 13.220.10 | | Word Count Estimation | 110,115 | | Date of Issue | 2024-11-28 | | Date of Implementation | 2025-12-01 | | Older Standard (superseded by this standard) | GB 25972-2010 | | Administrative Organization | National Fire and Rescue Administration | | Proposing organization | National Fire and Rescue Administration | | Issuing agency(ies) | State Administration of Market Supervision and Administration, National Administration of Standardization | | Standard ID | GB 25972-2010 (GB25972-2010) | | Description (Translated English) | Gas fire extinguishing systems and components | | Sector / Industry | National Standard | | Classification of Chinese Standard | C84 | | Classification of International Standard | 13.220.10 | | Word Count Estimation | 70,721 | | Date of Issue | 2011-01-10 | | Date of Implementation | 2011-06-01 | | Quoted Standard | GB 150; GB 5099; GB 5100; GB/T 8979; GB/T 9969; GB 18614; GB 20128; GA 61 | | Drafting Organization | Tianjin Fire Research Institute of Ministry of Public Security | | Administrative Organization | National Fire Protection Standardization Technical Committee Technical Committee fixed fire extinguishing systems | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 1 of 2011 (No. 166 overall) | | Proposing organization | People's Republic of China Ministry of Public Security | | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China | | Summary | This Chinese standard specifies the gas fire extinguishing systems and component parts of the terms and definitions, model preparation methods, requirements, test methods, inspection rules, instructions written request extinguishing agent filling requirements. This standard applies to seven fluorine propane (HFC227ea) fire extinguishing systems, trifluoromethane (HFC23) extinguishing systems, inert gas fire extinguishing system [ including: IG01 (argon) extinguishing systems, IG100 (nitrogen) fire extinguishing systems, IG55 (argon, nitrogen) fire system, IG541 (argon, nitrogen, carbon dioxide) fire extinguishing system ]. |
GB 25972-2024.Gas fire extinguishing systems and components
ICS 13.220.10
CCSC83
National Standard of the People's Republic of China
Replaces GB 25972-2010
Gas fire extinguishing systems and components
Released on 2024-11-28
2025-12-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface VII
1 Range 1
2 Normative references 1
3 Terms and Definitions 2
4 Model compilation method 4
4.1 Method for compiling fire extinguishing system model
4.2 Component model compilation method 4
5 Requirements 5
5.1 General requirements 5
5.2 Fire extinguishing system 6
5.3 Bottle Group 9
5.4 Nozzle 17
5.5 Selector valve 19
5.6 Check valve 20
5.7 Collector 21
5.8 Connecting pipe 21
5.9 Drive device 22
5.10 Control device 22
5.11 Signal feedback device 23
5.12 Pressure reducing device 24
5.13 Low leakage high sealing valve 25
5.14 Pipe fittings 25
5.15 Support bracket 26
5.16 Flow design calculation and verification 26
5.17 Protection zone pressure relief device 28
6 Test methods 29
6.1 Test requirements 29
6.2 Inspection of appearance, markings, documents, materials, fire extinguishing agents, pressurized gases, containers and gas cylinders 29
6.3 Hydraulic strength test 30
6.4 Air tightness test 30
6.5 Salt spray corrosion test 31
6.6 Stress corrosion test 31
6.7 Sulfur dioxide corrosion test 32
6.8 Voltage Withstand Test 33
6.9 Insulation resistance test 33
6.10 Fire extinguishing system test 34
6.11 Monitoring information type check 34
6.12 State sensing unit test 34
6.13 Data transmission unit test 34
6.14 DTU data application platform test 35
6.15 Bottle group filling density and filling pressure test 35
6.16 Vibration test 35
6.17 Temperature cycle leak test 36
6.18 Bottle group tipping impact test 37
6.19 Impact test of accidental discharge protection device 38
6.20 Fire extinguisher bottle set release time 38
6.21 External pressure fire extinguishing agent cylinder group characteristic test 38
6.22 Overpressure test 39
6.23 Working reliability test 39
6.24 Action test under maximum and minimum working pressure 40
6.25 Local resistance loss test 41
6.26 Container valve pressure relief performance test 42
6.27 Manual operation test 43
6.28 Contact resistance test 43
6.29 Weighing device alarm function test 43
6.30 High and Low Temperature Test 43
6.31 Weighing device overload test 43
6.32 Protection level 43
6.33 Check the pressure indicator dial and display screen 43
6.34 Basic error test of pressure display indication 44
6.35 Pressure indicator alternating load test 44
6.36 Pressure display alarm function test 44
6.37 Digital pressure display power supply test 44
6.38 Liquid level measuring device alarm function test 44
6.39 Safety relief device action test 44
6.40 Safety relief device release capacity test 45
6.41 Nozzle protection cap test 45
6.42 Nozzle flow characteristics test 45
6.43 Nozzle heat and pressure test 46
6.44 Nozzle heat and cold shock test 47
6.45 Nozzle impact resistance test 47
6.46 Total flooding nozzle spray characteristics test 48
6.47 Nozzle noise test 52
6.48 Check valve opening pressure test 54
6.49 Manifold flow test 54
6.50 Hot air aging test for non-metallic connecting pipes 54
6.51 Low temperature test of non-metallic connecting pipes 54
6.52 Drive device signal feedback function test 54
6.53 Control device test 54
6.54 Signal feedback device action test 55
6.55 Pressure relief device pressure relief performance test 55
6.56 High voltage impact test 56
6.57 Low leakage high sealing valve closing pressure test 56
6.58 Coating Test 56
6.59 Load-bearing capacity test 56
6.60 Cyclic loading test 57
6.61 Fatigue test 57
6.62 Action pressure test of pressure relief device in protection area 57
6.63 Test of effective pressure relief area of pressure relief device in protection area 57
6.64 Low temperature resistance test of pressure relief device in protection area 57
6.65 High temperature resistance test of pressure relief device in protection area 57
6.66 Fire resistance test 57
6.67 Air leakage test 57
6.68 Negative pressure resistance test 58
7 Inspection Rules 58
7.1 Inspection categories, inspection items and test procedures 58
7.2 Sampling method and sample size 64
7.3 Determination of test results 64
8 User Manual 65
9 Fire extinguishing agent filling 65
10 Packaging, transportation and storage 65
10.1 Packaging 65
10.2 Transport 65
10.3 Storage 65
Appendix A (Informative) Method for compiling component models 66
Appendix B (Normative) Method for determining the maximum working pressure and minimum working pressure at different filling densities 68
B.1 Test conditions 68
B.2 Test Procedure 68
Appendix C (Informative) DTU data application platform, SSU and DTU connection relationship example 69
C.1 DTU Function Description 69
C.2 Example of DTU data application platform, SSU and DTU connection relationship 69
Appendix D (Informative) Fire Extinguishing Concentrations for Class B n-heptane Fires and Class A Wood Stack Surface Fires
Appendix E (Informative) Test method for determining the extinguishing concentration of n-heptane for Class B and Class A wood pile surface fires 73
E.1 Experimental Space 73
E.2 Measurement parameters 73
E.3 Test fire extinguishing system 73
E.4 Conditions for determining fire extinguishing concentration 73
E.5 Class B n-heptane fire extinguishing test 74
E.6 Class A wood pile fire extinguishing test 75
Appendix F (Normative) Fire Extinguishing System Test Procedure and Sample Quantity 77
F.1 Test procedure 77
F.2 Number of samples 77
Appendix G (Normative) Test procedures and sample quantity for fire extinguishing agent bottles 78
G.1 Test procedure 78
G.2 Sample quantity 78
Appendix H (Normative) Test procedures and sample quantities for driving gas cylinders and starting gas cylinders 79
H.1 Test procedure 79
H.2 Number of samples. 79
Appendix I (Normative) Test procedures and sample quantities for containers and gas cylinders 80
I.1 Test procedure 80
I.2 Sample quantity 80
Appendix J (Normative) Container Valve Test Procedure and Sample Quantity 81
J.1 Test procedure 81
J.2 Sample quantity 81
Appendix K (Normative) Weighing device test procedure and sample quantity 82
K.1 Test procedure 82
K.2 Sample quantity 82
Appendix L (Normative) Pressure Indicator Test Procedure and Sample Quantity 83
L.1 Test procedure83
L.2 Number of samples. 84
Appendix M (Normative) Test procedures and sample quantities for level measuring devices 85
M.1 Test procedure 85
M.2 Sample quantity 85
Appendix N (Normative) Safety relief device test procedures and sample quantity 86
N.1 Test procedure 86
N.2 Number of samples. 86
Appendix O (Normative) Nozzle test procedure and sample quantity 87
O.1 Test procedure 87
O.2 Number of samples. 87
Appendix P (Normative) Selection Valve Test Procedure and Sample Quantity 88
P.1 Test Procedure 88
P.2 Sample quantity 88
Appendix Q (Normative) Check Valve Test Procedure and Sample Quantity 89
Q.1 Test procedure 89
Q.2 Sample quantity 89
Appendix R (Normative) Manifold Test Procedure and Sample Quantity 90
R.1 Test procedure 90
R.2 Sample quantity 90
Appendix S (Normative) Connection pipe test procedure and sample quantity 91
S.1 Test procedure 91
S.2 Sample quantity 91
Appendix T (Normative) Drive device test procedure and sample quantity 92
Appendix U (Normative) Control device test procedures and sample quantities 93
U.1 Test Procedure 93
U.2 Sample quantity 93
Appendix V (Normative) Signal Feedback Device Test Procedure and Sample Quantity 94
V.1 Test Procedure 94
V.2 Sample quantity 94
Appendix W (Normative) Pressure Relief Device Test Procedure and Sample Quantity 95
W.1 Test procedure 95
W.2 Sample quantity 95
Appendix X (Normative) Low Leakage High Seal Valve Test Procedure and Sample Quantity 96
X.1 Test procedure 96
X.2 Sample quantity 96
Appendix Y (Normative) Pipe fitting test procedures and sample quantities 97
Y.1 Test procedure 97
Y.2 Sample quantity 97
Appendix Z (Normative) Support and hanger test procedures and sample quantity 98
Z.1 Test procedure 98
Z.2 Sample quantity 98
Appendix AA (Normative) Test procedures and sample quantities for pressure relief devices in protected areas 99
AA.1 Test Procedure 99
AA.2 Sample quantity 99
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document replaces GB 25972-2010 "Gas fire extinguishing systems and components". Compared with GB 25972-2010, except for structural adjustments and editing
In addition to the changes in performance, the main technical changes are as follows.
a) The scope of application has been changed (see Chapter 1, Chapter 1 of the.2010 edition);
b) The definitions of "maximum working pressure of fire extinguishing system" and "injection time" have been changed (see 3.4, 3.9, 3.1, 3.8 of the.2010 edition);
c) Added "External storage pressure gas fire extinguishing system", "Bottle group storage pressure", "Bottle group maximum working pressure" and "Bottle group minimum working pressure"
"Noise reduction nozzle", "State sensing unit (SSU)", "Data transmission unit (DTU)", "Protection zone pressure relief device", "Effective pressure relief surface
The terms and definitions of "pressure", "driving device" and "safety relief device operating pressure" (see 3.2, 3.6, 3.7, 3.8, 3.11, 3.12, 3.13,
3.14, 3.15, 3.16, 3.17);
d) The “method for compiling the model of fire extinguishing system” and “method for compiling the model of components” have been changed (see 4.1 and 4.2, 4.1 and 4.2 of the.2010 edition);
e) The operating temperature range and working pressure requirements of the fire extinguishing system have been changed (see 5.2.1.1, 5.2.1.3, 5.1.1.1,.2010 edition
5.1.1.2);
f) Added the requirements for the composition of the external pressure-type fire extinguishing system (see 5.2.2.2);
g) Added the functional requirements and test methods for fire extinguishing system status monitoring and data application platform (see 5.2.6, 6.12, 6.13, 6.14);
h) Changed the requirements for bottle group composition (see 5.3.1.1, 5.2.1 and 5.3.1 of the.2010 edition) and the requirements for bottle group filling density (see 5.3.3,
5.2.3 of the.2010 edition) and requirements for accidental discharge protection devices (see 5.3.9, 5.2.10 of the.2010 edition);
i) Added the requirements for cylinder group structure (see 5.3.1.2), cylinder group characteristics and test methods of external pressure fire extinguishing agent cylinder group (see 5.3.12,
6.21), filling density and filling pressure test method of bottle group (see 6.15), impact resistance test method of accidental discharge protection device (see
6.19);
j) Changed the requirements for containers and gas cylinders (see 5.3.14, 5.4 of the.2010 edition);
k) Changed the requirements for the reliability and local resistance loss of container valves (see 5.3.15.4, 5.3.15.6, 5.5.8,.2010 edition)
5.5.9) Action test method under maximum and minimum working pressure (see 6.24, 6.7 of the.2010 edition);
l) Added requirements and test methods for pressure relief container valves (see 5.3.15.8 and 6.26);
m) The general requirements for pressure indicators have been changed (see 5.3.16.2.1, 5.14.2.1 of the.2010 edition);
n) Added the requirements for the display screen of the digital pressure display (see 5.3.16.2.3) and the power supply requirements (see 5.3.16.2.9);
o) The requirements for the release action pressure of the safety relief device (see 5.3.17.1, 5.11.1 of the.2010 edition), the safety relief device action pressure, and the safety relief device action pressure have been changed.
Test method (see 6.39, 6.15 of the.2010 edition);
p) Added the discharge capacity requirements and test methods of safety discharge devices (see 5.3.17.4 and 6.40);
q) The nozzle size requirements (see 5.4.1, 5.6.2 of the.2010 edition) and the test method for the spray characteristics of fully submerged nozzles (see 6.46,
6.21 of the.2010 edition);
r) Added the requirements for noise reduction nozzle jet noise and its test methods (see 5.4.8 and 6.47);
s) Changed the requirements for selector valve operating reliability (see 5.5.3, 5.7.6 of the.2010 edition);
t) Added the requirements for the feedback function of the selector valve opening and closing status signal (see 5.5.7);
u) Added drive device signal feedback requirements and test methods (see 5.9.2, 6.52);
v) Added the function of preventing accidental spraying of the control device (see 5.10.2), fault alarm and self-checking function requirements (see 5.10.3);
w) Changed the action pressure requirements of the signal feedback device (see 5.11.2, 5.15.2 of the.2010 edition);
x) Added high pressure impact resistance performance of pressure relief devices (see 5.12.4), corrosion resistance requirements (see 5.12.5) and high pressure impact resistance test
Methods (see 6.56);
y) The decompression performance test method of the decompression device has been changed (see 6.55, 6.38 of the.2010 edition);
z) Changed the low leakage high sealing valve setting requirements (see 5.13.1, 5.17.1 of the.2010 edition), the nominal working pressure requirements (see 5.13.2,
5.17.3 of the.2010 edition);
aa) Added requirements and test methods for seismic support and hanger brackets (see 5.15.3 to 5.15.5, 6.59 to 6.61);
ab) Added flow design calculation and verification (see 5.16);
ac) Added requirements and test methods for pressure relief devices in protected areas (see 5.17, 6.2, 6.5, 6.16.3, 6.23.5, 6.62~6.68);
ad) The type inspection items and factory inspection items have been changed (see Table 9, Table 4 of the.2010 edition);
ae) Added packaging, transportation and storage requirements (see Chapter 10);
af) Added the method for determining the maximum working pressure and minimum working pressure under different filling densities (see Appendix B);
ag) Added the test procedure and sample quantity for the protection area pressure relief device (see Appendix AA).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document is proposed and coordinated by the National Fire and Rescue Administration.
The previous versions of this document and the documents it replaces are as follows.
---First published in.2011 as GB 25972;
---This is the first revision.
Gas fire extinguishing systems and components
1 Scope
This document specifies the gas fire extinguishing system (hereinafter referred to as the "fire extinguishing system") and its components (status sensing unit, data transmission unit, bottle
Group, nozzle, selector valve, check valve, manifold, connecting pipe, safety relief device, drive device, control device, signal feedback device, pressure reducing device
requirements, flow design calculation and verification, inspection rules, and instructions for use
The book, filling and packaging of fire extinguishing agents, transportation, storage, etc., gives the model compilation method and describes the corresponding test methods.
This document is applicable to fire extinguishing systems of chemical synthetic fire extinguishing agents such as heptafluoropropane (HFC227ea) and IG-01 (argon), IG-100 (nitrogen)
Design, manufacture and maintenance of inert gas extinguishing systems such as IG-55 (argon, nitrogen), IG-541 (argon, nitrogen, carbon dioxide)
test.
This document does not apply to halogen fire extinguishing systems, high-pressure and low-pressure carbon dioxide fire extinguishing systems, suspended gas fire extinguishing devices and cabinet gas
Fire extinguishing equipment.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 150 (all parts) Pressure vessels
GB/T 567.1-2012 Bursting disc safety devices Part 1.Basic requirements
GB/T 672 Chemical reagent magnesium chloride hexahydrate (magnesium chloride)
GB/T 4208-2017 Enclosure protection degree (IP code)
GB 4396 Carbon dioxide fire extinguishing agent
GB 4717-2024 Fire alarm controller
GB/T 4956 Measurement of coating thickness of non-magnetic coatings on magnetic substrates - Magnetic method
GB/T 5099.1 Seamless steel gas cylinders Part 1.Steel cylinders with a tensile strength of less than 1100 MPa after quenching and tempering
GB/T 5099.4 Seamless steel gas cylinders Part 4.Seamless stainless steel gas cylinders
GB/T 5100 Steel welded gas cylinders
GB/T 6052 Industrial liquid carbon dioxide
GB/T 7551 Load Cell
GB/T 8979 Pure nitrogen, high purity nitrogen and ultra-pure nitrogen
GB/T 9969 General principles for instructions for use of industrial products
GB/T 9978.1-2008 Fire resistance test methods for building components Part 1.General requirements
GB/T 11640 Aluminum alloy seamless gas cylinders
GB/T 13384 General technical requirements for packaging of electromechanical products
GB 15930-2007 Fire dampers for building ventilation and smoke exhaust systems
GB 18614 Heptafluoropropane (HFC227ea) fire extinguishing agent
GB/T 18806 General specification for resistance strain gauge pressure sensors
GB.20128 Inert gas fire extinguishing agent
......
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 6.8.2 and the published
value in the production unit's instruction manual shall not exceed 10% of the
published value in the instruction manual.
5.7.8 Corrosion resistance
5.7.8.1 Salt spray corrosion resistance
The salt spray corrosion test shall be carried out in accordance with the method
specified in 6.9. The selection valve and its accessories shall not have obvious
corrosion damage. After the test, the sealing performance of the selection valve
shall comply with the provisions of 5.7.5. When the working reliability is tested
in accordance with the provisions of 6.6.1, it shall be able to open accurately
and reliably.
5.7.8.2 Stress corrosion resistance
The stress corrosion test is performed in accordance with the method specified
in 6.11. The valve and its accessories shall not be cracked or damaged. The
strength of the selection valve after the test shall comply with the provisions of
5.7.4.
5.7.8.3 Resistance to sulfur dioxide corrosion
The sulfur dioxide corrosion test shall be carried out in accordance with the
method specified in 6.10. The selection valve and its accessories shall not have
group and the pressure holding time is 5 minutes.
The one-way valves have the same forward and reverse strength requirements.
5.8.5 Forward sealing requirements
The airtightness test shall be carried out in accordance with the method
specified in 6.4.3. The one-way valve shall be free from air leakage. The test
pressure is the maximum working pressure of the cylinder group and the
pressure holding time is 5 min.
5.8.6 Backward sealing requirements
The one-way valve used on the flow channel of the fire extinguishing agent shall
be tested for backward airtightness in accordance with the method specified in
6.4.3. The bubble leakage shall not exceed 20 bubbles per minute at the
maximum working pressure of the cylinder group.
The one-way valve which is used along the driving gas control pipeline shall not
produce air bubble leakage under the maximum working pressure.
5.8.7 Working reliability requirements
The working reliability test shall be carried out in accordance with the method
specified in 6.6.2. The one-way valve shall be able to withstand 100 times
“open-close” action tests. The opening and closing actions shall be flexible and
accurate and shall not cause any failure or structural damage.
5.8.8 Opening pressure requirements
The test is carried out in accordance with the method specified in 6.22, the
opening pressure of the one-way valve shall not exceed the published value of
the production unit's instruction manual.
5.8.9 Local resistance loss
The local resistance loss of the one-way valve of the heptafluoropropane fire
extinguishing system and the trifluoromethane fire extinguishing system is
expressed in terms of the equivalent length of the connected pipeline. The
difference between the equivalent length of the one-way valve measured by the
test method specified in 6.8.1 and the published value in the manufacturer's
instruction manual shall not exceed 10% of the published value in the instruction
manual.
The local resistance loss of the one-way valve 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 6.8.2 and the
published value in the manufacturer's instruction manual shall not exceed 10%
The stress corrosion test shall be carried out in accordance with the method
specified in 6.11. The safety venting device shall not be cracked or damaged.
The discharge pressure range of the safety venting device after the test shall
comply with the provisions of 5.11.1.
5.11.2.3 Resistance to sulfur dioxide corrosion
Sulfur dioxide corrosion test shall be carried out in accordance with the method
specified in 6.10. The safety venting device shall not have obvious corrosion
damage. The discharge pressure range of the safety venting device after the
test shall comply with the provisions of 5.11.1.
5.11.3 Temperature cycling resistance
After the temperature cycling test in accordance with the method specified in
6.13, the discharge pressure range of the safety venting device installed on the
cylinder group shall comply with the provisions of 5.11.1.
5.12 Drive device
The performance of the drive system of the system shall comply with the
provisions of GA 61, where the working temperature range shall comply with
the requirements of 5.1.1.1.
5.13 Control panel
5.13.1 Power requirements
The power supply shall meet the following requirements.
a) When the AC supply voltage varies within the range of 187 V ~ 242 V and
the frequency is 50 Hz ± 1 Hz, the control panel shall be able to work
reliably;
b) The standby power supply capacity of the control panel shall be capable
of continuous operation for 24 h under normal monitoring conditions,
during which the system shall be reliably started;
c) Main and standby power supply shall have working instructions.
5.13.2 Alarm function
The control panel shall be able to receive the fire alarm signal from the fire
detector and the fire alarm triggering device, and emit an audible and visual
alarm signal. At rated working voltage, at 1 m away from the control panel, the
sound pressure levels (A weighting) of the internal and external audio
components shall be 65 dB (A) and 85 dB (A) above and 115 dB (A) below,
respectively.
units or trademarks, product name models, product numbers, date of exit-
factory, etc.
5.14 Leak detection device
5.14.1 Weighing device
5.14.1.1 Alarm function
The weighing device installed in the fire extinguishing system shall have an
upper leakage alarm function. When the leakage of the filled media in the
cylinder group reaches 5% of the filling mass, it shall be able to be reliably
alarmed. The light alarm signal shall be yellow, in the general lighting conditions,
it shall be clearly visible from a distance of 3 m; the sound pressure level (A
weighting) of sound alarm signal at rated voltage at a distance of 1 m shall not
be less than 65 dB (A).
5.14.1.2 High and low temperature resistance
After the weighing device is placed in the maximum working temperature and
minimum working temperature environment specified in 5.1.1.1 for 8 h, its alarm
function shall meet the requirements of 5.14.1.1.
5.14.1.3 Overload requirements
The weighing device is subjected to a static load of 2 times the mass of the
cylinder group (calculated in accordance with the maximum filling density of the
medium in the cylinder group) and maintained at 15 min, and shall not be
damaged. The alarm function after the test shall comply with the provisions of
5.14.1.1.
5.14.1.4 Corrosion resistance
5.14.1.4.1 Salt spray corrosion resistance
The salt spray corrosion test shall be carried out in accordance with the method
specified in 6.9. The weighing device shall not have obvious corrosion damage.
The alarm function after the test shall comply with the provisions of 5.14.1.1.
5.14.1.4.2 Resistance to sulfur dioxide corrosion
Sulfur dioxide corrosion test shall be carried out in accordance with the method
specified in 6.10. The weighing device shall not have obvious corrosion damage.
The alarm function after the test shall meet the requirements of 5.14.1.1
5.14.1.5 Signs
The obvious part of the device is marked with. production unit or trademark,
the provisions of 5.14.3.1.
5.14.3.4 Signs
The obvious part of the device shall be marked with. production unit or
trademark, product model specifications, measurement range, etc.
5.15 Signal feedback device
5.15.1 Working pressure
The working pressure of the signal feedback device shall not be less than the
maximum working pressure of the system.
5.15.2 Action pressure
The action pressure setting of the signal feedback device shall not exceed 0.5
times the minimum working pressure of the system. When the signal feedback
device is installed behind the decompression device, its action pressure setting
value shall not exceed 50% of the pressure behind the decompression device.
The action pressure deviation of the signal feedback device shall not exceed
10% of the set value.
The signal feedback device shall have a self-locking function that can only be
manually reset after the action.
5.15.3 Working reliability requirements
It is tested in accordance with the method specified in 6.36, the signal feedback
device shall be operated 100 times reliably under the pressure greater than or
equal to the action pressure without any failure and structural damage. The
contact resistance of the signal feedback device contact after the test shall meet
the requirements of 5.15.9.
5.15.4 Strength requirements
Perform the hydraulic strength test in accordance with the method specified in
6.3. The signal feedback device shall not be damaged.
The test pressure is 1.5 times the maximum working pressure of the system
and the pressure holding time is 5 min.
5.15.5 Sealing requirements
The airtightness test shall be carried out in accordance with the method
specified in 6.4.2. The signal feedback device shall not have air bubble leakage.
The test pressure is the maximum working pressure of the system, and the
pressure is maintained for 5 minutes.
5.16 1 Decompression device
5.16.1 Working pressure
The working pressure of the inert gas extinguishing system decompression
device shall comply with the provisions of 5.1.1.2.
5.16.2 Strength requirements
The hydraulic strength test shall be carried out in accordance with the method
specified in 6.3. The pressure relief device shall not leak, deform or be damaged.
The test pressure is 1.5 times the maximum working pressure of the system
and the pressure holding time is 5 minutes.
5.16.3 Sealing requirements
The airtightness test shall be carried out in accordance with the method
specified in 6.4.5. The pressure relief device shall be free of air bubbles.
The test pressure is the maximum working pressure of the system and the
pressure holding time is 5 min.
5.16.4 Decompression characteristics
In accordance with the test method specified in 6.38, the difference between
the decompression characteristics of the decompression device measured at
the specified flow rate and the published values in the operating instructions of
the production unit shall be no more than 10% of the value declared in the
operating instruction.
5.16.5 Signs
The obvious parts of the decompression device shall be marked with.
production unit or trademark, model specification, medium flow direction, etc.
5.17 Low venting high close valve
5.17.1 Setting requirements
The low venting high close valve shall be installed on the header pipe of the
combined distribution system.
Low venting high close valve shall be installed on the driving gas control
pipeline.
5.17.2 Materials
The low venting high close valve and its internal mechanical parts shall be made
a) Ambient temperature. + 15 °C ~ + 35 °C;
b) Relative humidity. 45 % ~ 75 %;
c) Atmospheric pressure. 86 kPa ~ 106 kPa.
6.2 Appearance, material inspection
6.2.1 With reference to the design drawings and related technical
documentation, visually check or using a general-purpose instrument to check
the sample structure, size, extinguishing agent and pressurized gas, the volume
and diameter of the storage container, and the material of the part to see if they
are in accordance with the provisions of Clause 5.
6.2.2 Use visual inspection to check the contents of component signs, fixing
methods, and cylinder group composition.
6.2.3 Check the consistency of the sample process, visually inspect whether
there are processing defects, surface coating defects, mechanical damage and
other defects, whether it meets the provisions of the corresponding provisions
and design requirements.
6.3 Hydraulic strength test
6.3.1 The hydraulic source for the hydraulic strength test device shall have a
voltage regulator function to eliminate pressure pulses. The accuracy of the
pressure measuring instrument shall not be lower than class 1.6. The rate of
pressure increase of the test device shall be adjustable within the range of
service pressure.
The hydraulic strength test of pressure display can also be performed on a
piston pressure tester.
6.3.2 Connect the inlet of the sample to be tested to the hydraulic strength tester,
remove the air from the connection pipeline and the sample cavity, close all the
outlets of the sample. Slowly pressurize to the test pressure at a rate of no more
than 0.5 MPa/s. Relieve the pressure after holding for 5 min. Examine the
sample and record the test results.
The pressurizing rate of connection pipeline strength test is not less than 0.5
MPa/s.
6.4 Airtightness test
6.4.1 Test requirements
The air pressure sealing test device uses nitrogen or compressed air, the
accuracy of the pressure measuring......
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