GB 16669-1996 General technical requirements for carbon dioxide fire extinguishing systems and components
Some standard content:
GB16669—1996
This standard was formulated in accordance with the requirements of the Ministry of Public Security's "1992 Fire Technology Standard Formulation and Revision Project Plan" and with reference to relevant domestic and foreign standards and specifications.
In view of the fact that the domestic low-pressure carbon dioxide fire extinguishing system is still in the development and research stage, this standard only stipulates the performance requirements, test methods and inspection rules of the high-pressure carbon dioxide fire extinguishing system and its components, while the low-pressure carbon dioxide fire extinguishing system can partially refer to this standard. Some performance parameters of this standard are mainly formulated with reference to ISO/DP8476 "Carbon Dioxide and Halon Fire Extinguishing System Components", ISO6183 "Fire Protection Equipment-Carbon Dioxide Fire Extinguishing System Design and Installation Specifications", BS5306Part4:1986 "Indoor Fire Extinguishing Devices and Equipment" (Carbon Dioxide System Specifications), NFPA12 "Carbon Dioxide Fire Extinguishing System", GB50193 "Carbon Dioxide Fire Extinguishing System Design Specifications" and other domestic and foreign standards and specifications, and the performance parameters are completely consistent with the current national specifications of my country. This standard is formulated for the first time. The standard writing format conforms to the provisions of GB/T1.1-1993 and GB/T1.22-1993. Appendices A to H of this standard are all appendices of the standard. This standard is proposed by the Fire Department of the Ministry of Public Security of the People's Republic of China. This standard is under the jurisdiction of the Second Sub-Technical Committee of the National Technical Committee for Fire Protection Standardization. This standard is drafted by the Tianjin Fire Science Research Institute of the Ministry of Public Security and Nanjing Fire Equipment Factory. The main drafters of this standard are Xie Bingxian, Li Fa, Liu Lianxi, Yao Xiaogang and Wang Zhanjun. 180
1 Scope
National Standard of the People's Republic of China
General technical specifications for components of carbon dioxide fire extinguishing systemsGB16669—1996
This standard specifies the performance requirements, test methods and inspection rules for carbon dioxide fire extinguishing systems and components such as containers, container valves, nozzles, actuators, selector valves, check valves, manifolds, connecting pipes, etc. This standard applies to carbon dioxide fire extinguishing systems stored in high pressure form. 2 Reference Standards
The following standards contain provisions that constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB795-89 Performance requirements and test methods for halogenated fire extinguishing system container valves GB796-89 Performance requirements and test methods for halogenated fire extinguishing system nozzles GB 998-82
Basic test methods for low-voltage electrical appliances
GB4715-93 Technical requirements and test methods for point-type smoke detectors GB 4716-93
GB 4717—93
GB 5099---85
GB 5100—85
Technical requirements and test methods for point-type heat-sensing fire detectors General technical conditions for fire alarm controllers
Seamless steel gas cylinders
Welded steel gas cylinders
GB 14103—93
GB 14104--93
3 Definitions
Halon fire extinguishing system
Performance requirements and test methods for selector valves
Performance requirements and test methods for check valves
Halon fire extinguishing system
This standard adopts the following definitions.
3.1 Filling density
The ratio of the mass of carbon dioxide in a storage container to the volume of the container, kg/m. 3.2 Maximum working pressure
The equilibrium pressure in the container after the container is filled with carbon dioxide and placed at the higher of the following two temperatures. a) 49°C;
b) The maximum working temperature recommended (or specified) by the manufacturer. 3.3 Actuator
The actuator that starts the container valve to release the carbon dioxide fire extinguishing agent. Approved by the State Bureau of Technical Supervision on December 18, 1996, and implemented on June 1, 1997
4 Performance requirements
GB16669-1996
In the carbon dioxide fire extinguishing system, the operating temperature limit of each component except the nozzle is 0℃ to 49℃. When the design operating temperature exceeds this limit, permanent marks should be made on each component to indicate its operating temperature limit. 4.1 Container
The pressure vessel for storing carbon dioxide fire extinguishing agent should be a refillable steel seamless container, and the pressure vessel for storing driving gas should be a steel seamless container, or a steel welded container. 4.1.1 Materials
The material of the steel seamless container shall comply with the provisions of Chapter 2 of GB5099-85, and the material of the steel welded container shall comply with the provisions of Chapter 4 of GB5100-85.
4.1.2 Main parameters
4.1.2.1 Basic dimensions
Except for special requirements, the volume and diameter of seamless steel containers shall comply with the provisions of Table 2 in GB5099-85, and the volume and diameter of welded steel containers shall comply with the provisions of Table 1 in GB5100-85. 4.1.2.2 Working pressure
The working pressure of the container for storing carbon dioxide fire extinguishing agent shall not be less than 15MPa, and the working pressure of the container for storing driving gas shall be determined by the design.
A pressure relief device must be installed on the container (or container valve) for storing carbon dioxide fire extinguishing agent, and the pressure range of its pressure relief action is 19MPa±0.95MPa. A pressure display device with an indication accuracy of not less than 2.5% must be installed on the container (or container valve) for storing driving gas. 4.1.3 Strength requirements
Conduct a hydraulic strength test according to the method specified in 5.2, with the test pressure being 1.5 times the working pressure, and maintain for 2 minutes. The container shall not leak, and the residual deformation rate of its volume shall not be greater than 3%. 4.1.4 Sealing requirements
Conduct an airtightness test according to the method specified in 5.3.1, with the test pressure being the working pressure, and the container shall not have any bubble leakage. 4.1.5 Overpressure requirements
Conduct a hydraulic test according to the method specified in 5.4, 1, with the test pressure being 3 times the working pressure, and the container shall not have any rupture. 4.2 Container valve
The container valve shall be designed to ensure that its parts shall not be ejected out of the valve or into the pipeline when it is in operation. 4.2.1 Materials
The valve body shall be made of copper alloy, and may also be made of other metal materials with strength and corrosion resistance not lower than the above materials. The elastic sealing gasket shall be made of materials that are in contact with liquid carbon dioxide for a long time without damage or deformation. 4.2.2 Working pressure
The working pressure of the container valve used for carbon dioxide fire extinguishing agent storage container shall not be less than 15MPa. The working pressure of the container valve used for driving gas storage container shall be determined by design. 4.2.3 Strength requirements
Conduct hydraulic strength test according to the method specified in 5.2, the test pressure is 1.5 times the working pressure, and maintain for 5 minutes. The container valve and its accessories shall not be deformed or leak.
4.2.4 Sealing requirements
Conduct air tightness test on container valve according to the method specified in 5.3.2. At 1.1 times the working pressure, when the valve is closed, there shall be no bubble leakage; when the valve is open, the leakage pressure drop of each connection sealing part shall not be greater than 0.05MPa/min. 4.2.5 Overpressure requirements
Conduct hydraulic test according to the method specified in 5.4.2. At 3 times the working pressure, the container valve and its accessories shall not be broken. 4.2.6 Anti-cyst requirements
GB 16669-1996
Perform vibration test on the container and container valve assembly (including auxiliary control device) according to the test method specified in 5.7. No part of the container and container valve assembly shall have structural damage; the net weight loss of the fire extinguishing agent shall not exceed 0.5% of the fire extinguishing agent filling amount; the pressure loss of the driving gas shall not exceed 1.5% of the filling pressure. After the test, the container valve shall be checked. The container valve shall be able to work normally and open quickly and completely.
4.2.7 Temperature cycle leakage requirements
The container and container valve assembly shall be able to withstand the changes of the highest and lowest operating temperature cycles without excessive leakage and container valve action failure. After the test according to the method specified in 5.8, the net weight loss of the carbon dioxide fire extinguishing agent shall not exceed 0.5% of the fire extinguishing agent filling amount, and the pressure loss in the driving gas storage container shall not exceed 1.5% of the filling pressure. When the container valve is started, no action failure should occur.
4.2.8 Minimum and maximum working pressure requirements
Test according to the method specified in 5.20. The action of the container valve should be accurate and can be opened quickly and completely. 4.2.9 Working reliability requirements
The container valve and its auxiliary control device shall be in accordance with 5.9.1. The container valve should be flexible and reliable, and no faults or structural damage should occur (except for parts that are allowed to be damaged during normal operation). 4.2.10 Local resistance loss of container valve - equivalent length representation method The local resistance loss generated when the medium flows through the container valve, siphon and connecting pipe joint should be represented by the equivalent length of the pipe connected to it in design.
The equivalent length value of the container valve measured by the method specified in 5.11 should not exceed 10% of the design value. 4.2.11 Corrosion resistance requirements
Salt spray corrosion test should be carried out according to the test method specified in 5.6. There should be no obvious corrosion damage or performance degradation in various parts of the container valve. After this test, 5.3.2 and 5.9 tests should be carried out, and the requirements of 4.2.4 and 4.2.9 should be met. 4.2.12 Impact resistance requirements
After the container valve is assembled on the container, it shall be impacted three times by tipping in any direction, and then tested according to 5.3.2 and 5.9.1. It shall meet the requirements of 4.2.4 and 4.2.9.
4.2.13 Manual operation requirements
The manual operation test of the container valve shall be carried out according to the test method specified in 5.18, and the results shall meet the following requirements: a) The manual operation force shall not be greater than 150N;
b) The finger pull operation force shall not be greater than 50N;
c) The finger push operation force shall not be greater than 10N;
d) All manual operation displacements shall not be greater than 300mm. 4.2.14 Action requirements of the safety relief device of the container valve If the container valve is equipped with a safety relief device, it shall be able to operate within 19±0.95MPa. 4.3 Nozzle
4.3.1 Material
The various parts of the nozzle shall be made of corrosion-resistant materials and shall meet the strength and temperature resistance requirements of this standard. 4.3.2 Basic size
For nozzles without filter devices, the cross-sectional area of the nozzle hole shall be greater than 7mm, and the diameter of the nozzle hole or the length of any side of the non-circular hole shall be greater than 3mm. For nozzles with filter devices, the cross-sectional area of the nozzle hole shall be greater than 2mm, and the diameter of the nozzle hole or the length of any side of the non-circular hole shall be greater than 1.5mm. Www.bzxZ.net
The opening area of the filter shall be greater than 5 times the total cross-sectional area of the nozzle hole. The filter material shall have anti-corrosion performance. 4.3.3 Flow characteristics of the nozzle
The flow characteristics of the nozzle must be determined by test. Under normal storage container pressure, a spray test is carried out to measure the flow rate per unit area of the nozzle at different spray pressures. The measured test value shall not exceed ±10% of the measured nozzle characteristic data provided by the manufacturer. 183
4.3.4 Heat and pressure resistance requirements
GB16669--. 1996
After the test in accordance with the method specified in 5.13, the nozzle body shall not be deformed, cracked or damaged. 4.3.5 Heat and cold shock resistance requirements
After the test in accordance with the method specified in 5.14, the nozzle body shall not be deformed, cracked or damaged. 4.3.6 Impact resistance
After the test in accordance with the method specified in 5.10.2, the nozzle body shall not be deformed, cracked or damaged. 4.3.7 Corrosion resistance
The filter device of the nozzle shall have corrosion resistance and shall meet the requirements of 4.3.8 after the salt spray corrosion test in accordance with the method specified in 5.6.
4.3.8 Requirements for spray characteristics
4.3.8.1 Nozzles for total flooding systems (hereinafter referred to as total flooding nozzles) One or a group of total flooding nozzles in a carbon dioxide fire extinguishing system shall be able to evenly distribute the carbon dioxide fire extinguishing agent in the entire enclosed space corresponding to it. When tested according to the method specified in 5.15.1, snow-like carbon dioxide particles are not allowed to appear in the entire enclosed space of the test.
4.3.8.2 Local application nozzles
When tested according to the method of 5.15.2, the nozzle shall spray carbon dioxide evenly and smoothly, and there shall be no splashing of water in the test water tray. 4.4 Driver
4.4.1 Driver force requirements
The effective force of the electromagnetic driver shall not be less than 2 times the required operating force under the maximum load in the normal state. The output force of the pneumatic driver shall not be less than 2 times the system operating force under the maximum load at the lowest operating temperature. For the detonating actuator, during the last three months of the validity period of the detonating component, the driving force of the actuator shall not be less than 3 times the operating force of the device. The driving force provided by the mechanical actuator shall not be less than 2 times the operating force required for the action. 4.4.2 Insulation requirements
The insulation resistance between the terminal and the shell of the electromagnetic actuator, and between the core wire and the shell of the detonating actuator after the detonating component is removed, shall not be less than 20MQ2 under the conditions of an ambient air temperature of 20°C ± 5°C and a relative humidity of no more than 80%. 4.4.3 Working reliability requirements
When tested according to the method specified in 5.9.2, the actuator should move flexibly, and except for the parts that are allowed to be damaged during design, the remaining parts shall not be loose, deformed, or damaged. The reduction in driving force after the test shall not exceed 10% of that before the test. 4.4.4 Sealing requirements
There shall be no leakage at 1.1 times the working pressure for the pneumatic actuator. 4.4.5 Driver stroke requirements
The maximum stroke of a mechanical driver shall not exceed 300mm. When a mechanical driver provides driving force by dropping a heavy object, the heavy object shall be free and shall not be blocked. The length of the stroke shall exceed the distance required to start the system and shall not be less than 25mm. 4.5 Selection valve
4.5.1 Materials
The selection valve and its internal parts shall be made of corrosion-resistant metal materials, or other materials that meet the performance requirements of this chapter. 4.5.2 Working pressure
The working pressure of the selection valve shall not be less than 12MPa. 4.5.3 Strength requirements
The test shall be carried out according to the method specified in 5.2. At 1.5 times the working pressure, the pressure shall be maintained for 5 minutes. The selection valve and its accessories shall not be deformed, leaked, cracked or damaged.
4.5.4 Sealing requirements
Perform an air tightness test on the selector valve according to the method specified in 5.3.2. At 1.1 times the working pressure, there should be no air bubble leakage when the valve is in the closed state; when the valve is in the open state, the leakage pressure drop of each connection sealing part should not be greater than 0.05MPa/min. 4.5.5 Working reliability requirements
Perform the test according to the method specified in 5.9.3. The action of the selector valve should be flexible, accurate and reliable, and no faults or structural damage should occur.
4.5.6 Local resistance loss of selector valve - equivalent length expression method When the medium flows through the selector valve and the joint, the local resistance loss generated is expressed by the equivalent length of the pipeline connected to it in design. The equivalent length of the selector valve measured by the method specified in 5.11 should not exceed 10% of the design value. 4.5.7 Corrosion resistance
Carry out the salt spray corrosion test according to the test method of 5.6. There shall be no obvious corrosion loss or performance degradation in all parts of the selector valve. After this test, carry out the tests of 5.3.4 and 5.9.3 and meet the requirements of 4.5.4 and 4.5.5. 4.5.8 Manual operation requirements
Carry out the manual operation test of the selector valve according to the test method of 5.18. The results shall meet the following requirements. a) The manual operation force shall not be greater than 150N;
b) The manual operation stroke shall not be greater than 300mm. 4.6 Check valve
The check valve shall meet the actual needs of the carbon dioxide fire extinguishing system and can work reliably for a long time. 4.6.1 Materials
The valve body and parts shall be made of corrosion-resistant metal materials. It can also be made of other metal materials that meet the performance requirements of this chapter. 4.6.2 Working pressure
The working pressure of the one-way valve used in the circulation pipeline of carbon dioxide fire extinguishing agent shall not be less than 15MPa; the working pressure of the one-way valve used in the driving gas control pipeline shall be determined by the system design. 4.6.3 Strength requirements
Perform a hydraulic strength test on the one-way valve according to the method specified in 5.2. Maintain the pressure for 5 minutes at 1.5 times the working pressure. The valve body shall not leak and shall not be deformed, cracked or damaged. 4.6.4 Sealing requirements
Perform a hydraulic sealing test on the one-way valve according to the method specified in 5.3.4. Maintain the pressure for 5 minutes at 1.1 times the working pressure. The connection and sealing parts shall not leak.
4.6.5 Reverse leakage requirements
Perform a reverse leakage test on the one-way valve according to the method specified in 5.5. The test pressure is 1.5 times the working pressure. For the one-way valve used in the carbon dioxide fire extinguishing agent circulation pipeline, the liquid leakage at the valve inlet shall not exceed 0.5mL/min; for the one-way valve used in the driving gas control pipeline, there should be no leakage at the valve inlet. 4.6.6 Opening pressure requirements
Per 5.22. The opening pressure of the one-way valve shall not exceed the design requirement value, and the valve action shall be accurate under the opening pressure.
4.6.7 Working reliability requirements
When the one-way valve is tested for reliability according to the method specified in 5.9.4, the one-way valve shall be able to withstand 100 "open-close" action tests. Its action shall be flexible and accurate, and no failure or structural damage shall occur. 4.6.8 Local resistance loss of one-way valve - equivalent length representation method The local resistance loss generated when the medium flows through the one-way valve is represented by the equivalent length of the pipe connected to it. The equivalent length of the one-way valve measured by the method specified in 5.11 shall not exceed 10% of the design value. 4.6.9 Corrosion resistance requirements
After the salt spray corrosion test is carried out according to the method specified in 5.6, there shall be no obvious corrosion damage in all parts of the one-way valve, and the test shall be carried out according to the methods of 5.5 and 5.9.4, and the requirements of 4.6.5 and 4.6.7 shall be met. 185
4.7 Manifold
4.7.1 Materials
GB16669-1996
Manifolds shall be made of seamless steel pipes. Except for materials with corrosion resistance, manifolds made of other materials shall be subjected to anti-corrosion treatment of internal and external surface coating.
4.7.2 Working pressure
The working pressure of the manifold shall not be less than 12MPa. A pressure relief device shall be installed on the manifold, and the pressure range of its pressure relief action shall be 15MPa±0.75MPa.
4.7.3 Strength requirements
Perform a hydraulic test on the manifold according to the method specified in 5.2. Maintain the pressure for 5 minutes at 1.5 times the working pressure. The manifold shall not leak and shall not be deformed, cracked or damaged.
4.7.4 Sealing requirements
Perform an air tightness test on the manifold according to the method specified in 5.3.5. There should be no bubble leakage at 1.1 times the working pressure. 4.8 Connecting pipe
It is used to connect the container valve and the manifold. It should be made of a high-pressure hose or a metal pipe with equivalent pressure resistance and impact and vibration resistance. 4.8.1 The connecting pipe should be made of corrosion-resistant materials that can be in contact with liquid carbon dioxide without damage or deformation. 4.8.2 Working pressure
The working pressure of the connecting pipe should not be less than 12 MPa. 4.8.3 Strength requirements
Perform a hydraulic strength test on the connecting pipe according to the method specified in 5.2. The test pressure is 2 times the working pressure. The pressure is maintained for 5 minutes. There should be no leakage, local bulges and other abnormal phenomena.
4.8.4 Sealing requirements
Perform an air tightness test on the connecting pipe according to the method specified in 5.3.5. There should be no bubble leakage at 1.1 times the working pressure. 4.9 System
4.9.1 Appearance
4.9.1.1 The surface of each component of the system should be treated with anti-corrosion. The anti-corrosion coating should be uniform, beautiful and complete, and must not have defects such as pores, ash, scars, and bumps.
4.9.1.2 On the front of the fire extinguishing agent storage container, there should be the words "carbon dioxide" or "CO", and the handwriting should be obvious and clear. 4.9.1.3 The nameplate should be set in a conspicuous position of the unit, indicating the model, specification, production unit, and factory date. 4.9.1.4 There should be a clear and permanent mark on each selector valve, indicating the name or code of the protected area. 4.9.1.5 The installation and deployment of each component shall not affect maintenance, inspection and use operations. 4.9.2 Leak detection device performance requirements
4.9.2.1 Carbon dioxide fire extinguishing agent storage containers should be equipped with a device that can reliably display the amount of fire extinguishing agent leakage loss inside, with an accuracy of not less than 1.5%, and the operation should be simple and convenient, and the indication should be sensitive and accurate. 4.9 .2.2 Carbon dioxide fire extinguishing agent storage containers should be equipped with leakage limit alarm devices. When the carbon dioxide leakage reaches 10% of the filling weight, it should be able to reliably send out sound and light alarm signals. The light alarm signal should be yellow or light yellow and should be clearly visible at a distance of 3m under normal ambient light conditions. The sound pressure level of the sound alarm signal at a distance of 1m under the rated working voltage should not be less than 65dB(A). 4.9.3 Operation action requirements
4.9.3.1 The system should have the functions of automatic start, manual start and mechanical emergency start. The mechanical emergency start should have effective measures to prevent false operations, and use text and graphic symbols to indicate the methods and steps during operation. 4.9.3.2 The system should have a delayed start function, and the delay time can be between 0 and 30 s range. 4.9.3.3 The system's action procedure must meet the following requirements, that is, the container valve can only be opened after ensuring that the selector valve is open. 4.9.3.4 The system is tested for operation in automatic start-up, manual start-up and mechanical emergency start-up modes respectively. Its start-up and operation actions shall be accurate and reliable, without any faults, and the components shall not be loose, deformed or damaged. 4.9.4 Detection and alarm performance requirements
4.9.4.1 The fire detectors equipped in the system shall comply with the provisions of GB4715 and GB4716. 4.9.4.2 The fire alarm controller equipped in the system shall comply with the provisions of GB4717. 5 Test method
The performance of the system and its components shall be tested. Can be tested, should be based on the relevant design drawings, process documents, main technical parameters and other information of the sample to be tested, and follow the methods specified in this chapter for testing.
Components that are subject to air tightness test should be subject to air tightness test after hydraulic strength test. 5.1 Appearance inspection
5.1.1 All test pieces should be marked completely and meet the design requirements. 5.1.2 Inspect against the design drawings and process documents, and the samples should meet the technical requirements of design and processing. 5.1.3 Inspect the process consistency of the test pieces, and self-test for processing defects and mechanical damage. 5.2 Strength test
5.2.1 Test equipment:
a) Electric multi-cylinder reciprocating pressure test pump: equipped with a pressure stabilizing device; b) Pressure gauge: the accuracy shall not be lower than level 1.5, c) Stopwatch.
5.2.2 Connect the inlet of the sample to be tested to the hydraulic supply system (the container valve and selection valve should be in the open state), remove the air in the sample cavity, close all outlets, and slowly increase the pressure to the test pressure (the pressure increase rate during the container strength test should not be greater than 0.49MPa/s). Check the test piece within the specified pressure holding time, and the results should meet the requirements of 4.1.3, 4.2.3, 4.5.3, 4.6.3, 4.7.3, and 4.8.3 respectively. 5.3 Sealing test
5.3.1 Sealing test of container
Connect the container to the air pressure supply system, close all outlets, fill the container with compressed air or nitrogen to the test pressure value, and immerse the container in water for 1 minute for seamless steel containers and 2 minutes for welded steel containers. The results should meet the requirements of 4.1.4. 5.3.2 Sealing test of container valves and selector valves a) Connect the inlet of the closed valve to the compressed air or nitrogen gas source, immerse it in water, gradually pressurize it to the specified test pressure, and keep it for 3 minutes. The valve should have no bubble leakage. b) Connect the inlet of the open valve to the compressed air or nitrogen gas source, close all the outlets of the valve, immerse it in water, and gradually pressurize it to the test pressure. The average pressure drop within 5 minutes measured by a pressure gauge with an accuracy of not less than 1.5 should not be greater than 0.05MPa/min.
5.3.3 Sealing test of the actuator
Connect the actuator to the air pressure supply system, close all the outlets, put it in water, slowly pressurize it to the test pressure, and keep it for 3 minutes. The result should meet the requirements of 4.4.4.
5.3.4 Sealing test of check valve
5.3.4.1 The test equipment is the same as that specified in 5.2.1. 5.3.4.2 Connect the inlet of the test piece to the hydraulic supply system, slowly pressurize the valve body, and after the air in the body cavity is removed, close the outlet and continue to pressurize to the test pressure. Maintain for 5 minutes, and the result should meet the requirements of 4.6.4. 5.3.5 Tightness test of manifolds and connecting pipes Connect the interface of the sample to the air pressure supply system, close the other interfaces, immerse it in water, and pressurize the tube cavity to the specified test pressure. The pressure gauge indicating the pressure should be not less than Class 1.5. Continue for 5 minutes, and the result should meet the requirements of 4.7.4 and 4.8.4. 5.4 Overpressure test
5.4.1 Overpressure test of container
GB166691996
After the container is filled with water, connect the inlet to the hydraulic supply system (if there are other inlets and outlets on the container, they should be closed), slowly increase the pressure in the container, first increase to the working pressure and then release the pressure, repeat several times to remove the gas in the liquid. After the air is basically exhausted, the pressure is increased to the specified test pressure at a rate not exceeding 0.49MPa/s. The result should meet the requirements of 4.1.5. 5.4.2 Container valve overpressure test
Open the container valve and connect the inlet to the hydraulic supply system. After the air in the valve body is completely discharged, close all outlets and continue to slowly increase the pressure to the test pressure. After maintaining the pressure for 5 minutes, release the pressure. The result should meet the requirements of 4.2.5. 5.5 Check valve reverse leakage test
The test pressure is 1.5 times the working pressure. The test method is carried out in accordance with the provisions of Appendix A of GB14104-93. The result should meet the requirements of 4.6.5.
5.6 Salt spray corrosion test
When conducting salt spray corrosion test on container valves, nozzles, selector valves and check valves, the method is as follows: a) Test equipment: salt spray corrosion test chamber; b) Test preparation and cycle: After cleaning and degreasing, the test piece is hung on a special bracket in the test chamber, and the test cycle is 240h; c) Test salt solution: made of white sodium chloride dissolved in distilled water or deionized water, with a concentration of 50g/L ± 5g/L and a pH value of 6.5~～~7.2 at 25℃. The solution after spraying cannot be used again. d) Test conditions: During the test, the temperature in the salt spray corrosion test chamber is 35℃ ± 2℃, the spray rate is 1～2mL/h, (the average spray rate measured when the collector with an effective area of 80cm2 is placed in the chamber for 24h), and the spray is continuous throughout the test cycle. e) After the test, dry for 0.5～1h, wash in clean water at 40℃, and finally dry naturally in the air. The test results shall meet the requirements of 4.2.11, 4.3.7, 4.5.7 and 4.6.9 respectively. 5.7 Vibration test
5.7.1 Before the test, the container and the container valve assembly shall be fully assembled according to the use conditions, and the fire extinguishing agent shall be filled in the container according to the designed maximum fire extinguishing agent filling amount, and the corresponding working pressure level shall be reached at 20°C. 5.7.2 Install a container and a container valve assembly (including auxiliary devices) on the workbench of the vibration test machine and test it according to the method specified in 5.6 of GB795--89.
The test results shall meet the requirements of 4.2.6.
5.8 Temperature cycle leakage test
5.8.1 The test preparation is the same as 5.7.1.
5.8.2 The mass of the prepared components shall be measured with a weighing accuracy of ±0.1%, and they shall be placed at each temperature for 24 hours in the following order.
49℃±2℃；
0℃±2℃;
49℃±2℃;
0℃±2℃，
49℃±2℃；
0℃±2℃.
Or the above temperature cycle leakage test is carried out according to the highest and lowest working temperatures recommended by the manufacturer. After the above cycle is completed, the component is stored at a temperature of 25℃±5℃ for 24 days, and then the above cycle test is carried out again, and then the test is terminated after being stored at a temperature of 25℃±5℃ for 24 hours. After that, the quality of the component is measured, and then the operating mechanism is installed on the component and the valve is driven to make it operate. The result should meet the requirements of 4.2.7. 5.9 Working reliability test
5.9.1 Working reliability test of container valve
Install the container valve and its auxiliary control device components on the special test container, pressurize the container with compressed air or nitrogen to Pd (Pd is the pressure value in the container at different working temperatures under a certain filling density of the carbon dioxide storage container of the system), and carry out 100 repeated cycle tests according to the test sequence specified in 5.9 of GB795-89 at a temperature of 20188
GB16669-1996
±5℃, and carry out 10 times of repeated cycle tests at the highest and lowest working temperatures respectively.
Certain parts of the container valve that are allowed to be damaged during normal operation shall be replaced in time after each cycle test so as to continue the test. The test results shall meet the requirements of 4.2.9.
5.9.2 Driver working reliability test
a) Combine the container valve and the driver into a sample (or system), install the container valve on the test container, and pressurize the container valve with compressed air or nitrogen to Pd (Pd is the pressure value in the container when the carbon dioxide storage container of the system is at a certain filling density and different working temperatures).
b) Complete the cycle test in the following order at the corresponding temperature; 1) Pressurize to Pd, and the pressure holding time is not less than 5s; 2) Start the driver to open the container valve; 3) When the pressure in the container drops below 0.5MPa, close the container valve and reset the driver; 4) Pressurize the container valve again and continue the next cycle test. c) Repeat the above cycle test 100 times at a temperature of 20℃±5C. Perform 10 times at the highest and lowest working temperatures respectively. d) When performing repeated action tests at the highest and lowest working temperatures, the driver should be kept at the highest or lowest working temperature for 1h before the test can be carried out.
For electromagnetic actuators, when conducting the highest and lowest operating temperature tests, the tests should be conducted five times within the range of ±15% of the rated operating voltage. e) Repeated action test at room temperature: For electromagnetic and detonation types, the rated voltage and current can be passed to make them operate; for pneumatic types, the rated pressure of the airflow can be used to make them operate; for manual types, manpower is used to make them operate. The action frequency should be controlled at 4 to 6 times per minute, and each action should be identified and counted.
f) Use universal material testing machines, dynamometers and other equipment with appropriate ranges to measure the driving force of the actuator during operation. g) The repeated action test of the actuator can be conducted simultaneously with the working reliability test of the container valve. The test results should meet the requirements of 4.4.3.
5.9.3 Working reliability test of the selection valve
The test should be conducted according to the method specified in 6.3 of GB14103-93, and the results should meet the requirements of 4.5.5. 5.9.4 Test of working reliability of check valve
The test shall be conducted in accordance with the method specified in 5.5 of GB14104-93, and the result shall meet the requirements of 4.6.7. 5.10 Impact test
5.10.1 Impact test of container valve
The test shall be conducted in accordance with the method specified in 5.12 of GB795-89, and the result shall meet the requirements of 4.2.12. 5.10.2 Impact test of nozzle
The impact test shall be conducted in accordance with the test method and test device specified in Appendix B of GB796-89, and the result shall meet the requirements of 4.3.6. 5.11 Determination of equivalent length of container valve, selector valve and check valve shall be conducted in accordance with the test sequence specified in 5.10 of GB795-89, and the results shall meet the requirements of 4.2.10, 4.5.6 and 4.6.8 respectively. Note: The container valve shall be equipped with a siphon during the test. 5.12 Nozzle flow characteristic test
The test shall be carried out according to the spray performance test method specified in 5.2 of GB796-89. The result shall meet the requirements of 4.3.3. 5.13 Heat and pressure resistance test
The nozzle shall be installed in a temperature test chamber and connected to a pressure vessel through a pipeline. The container shall store test nitrogen at a pressure of 8MPa. The nozzle shall be kept at a temperature of 600℃±20℃ for 5min, and then the temperature test chamber shall be opened quickly to spray nitrogen from the nozzle. The spray time is 10s. The result shall meet the requirements of 4.3.4. The test device is the same as that shown in Figure 2 of GB796-89. 5.14 Heat and cold shock resistance test
GB16669.1996
The nozzle is installed in a temperature test chamber and connected to a pressure vessel containing carbon dioxide through a pipeline. After the nozzle is kept at a temperature of 600℃±20℃ for 5 minutes, it is moved to a low-temperature test chamber of -20℃ and carbon dioxide with a pressure of 2±0.1MPa is sprayed from the nozzle for 1 minute. The result should meet the requirements of 4.3.5. The test device is the same as that shown in Figure 3 of GB 796-89. 5.15 Nozzle spray characteristic test
5.15.1 Spray characteristic test of full flooding nozzle Select one or a group of nozzle samples that are suitable for the closed space used for the test. The temperature in the closed space is 20℃±5℃ and the relative humidity is (60±5)%.
The amount of carbon dioxide stored in the container of the test system should be able to maintain a pressure of 5.7±0.2MPa during the test. The nozzle pressure should not be less than 3.0MPa and the spray time is 1min. After the spray test, the results should meet the requirements of 4.3.8.1. 5.15.2 Spray characteristic test of local application nozzles Install the nozzle above the test plate filled with water and in the symmetry plane of the test plate. The size and installation position of the test plate are shown in Figure 1. The installation height (i.e. the distance from the nozzle outlet to the horizontal plane) is provided by the manufacturer. The container pressure, nozzle pressure and spray time are the same as 5.15.1. When the nozzle installation angle is within the range of 45° to 90° for spraying, it should meet the requirements of 4.3.8.2. 5.16 Determination of the driving force of the actuator
According to the structural characteristics and driving forms of the electromagnetic type, pneumatic type, mechanical type and detonation type, the maximum driving force of the actuator in the full stroke is measured by a universal material testing machine, a force measuring machine, a dynamometer and other force measuring equipment (the force measurement error should not be greater than 2%), which should meet the requirements of 4.4.1. 5.17 Determination of the stroke of the actuator
The actuator moves the actuator according to its respective driving method, and the maximum displacement of the actuator is measured with a vernier caliper with a reading accuracy of not less than 0.1mm, which should meet the requirements of 4.4.5. 5.18 Manual operation test
Connect the manual operating mechanism of the container valve or selector valve with the force measuring device, the force measurement error should not be greater than 2%, operate the selector valve or container valve through the force measuring device, record the maximum operating force, and measure and record the maximum operating stroke. The test results should meet the requirements of 4.2.13 and 4.5.8.
5.19 Safety relief device action test
5.19.1 The test equipment is the same as 5.2.1, and the pressure gauge should be equipped with a stop needle device. 5.19.2 Connect the component equipped with the safety relief device to the hydraulic supply system, fill it with water and exhaust the air, close all outlets, pressurize the safety relief device to make the relief device act, and record the pressure at this time. The test results should meet the pressure relief action requirements specified in 4.1.2.2, 4.2.14, and 4.7.2.
In the figure; BB2-
-Nozzle installation position;
GB 16669--1996
Figure 1 Nozzle installation position
-Aiming and pushing point when the nozzle is installed vertically (coincides with the center of the plate); E2-Aiming point when the nozzle installation angle is in the range of 45° to 90°;-Aiming point deviation distance when the installation angle is less than 90°, see Table 1; L
S—Nozzle installation height (the distance from the nozzle outlet to the aiming point); @Nozzle installation angle.
Nozzle installation angle Φ, (\)
5.20 Container valve minimum and maximum working pressure working reliability test water surface
Test plate
(Welded with thin steel plate)
Aiming point deviation distance L, m
0.25~0.125
Test according to the method specified in 5.8 of GB795--89, and the result shall meet the requirements of 4.2.8. 5.21 Insulation resistance determination
When conducting insulation resistance test on electromagnetic or detonation type actuators, the method specified in GB998--82 shall be followed, and the result shall meet the requirements of 4.4.2.
5.22 Check valve opening pressure test
Test according to the method specified in 5.4 of GB14104-93, and the result shall meet the requirements of 4.6.6. 5.23 System test
5.23.1 System appearance inspection
Visually inspect the system appearance, which shall comply with the requirements of 4.9.1. 5.23.2 Leak detection device performance test
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