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GB 25972-2010 English PDF (GB25972-2010)

GB 25972-2010 English PDF (GB25972-2010)

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GB 25972-2010: Gas fire extinguishing systems and components

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.
GB 25972-2010
GB
NATIONAL STANDARD OF THE
PEOPLE 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 detectio...

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