GB 47485-2026Hanging gas fire extinguishing equipment (English PDF)

5.1 Fire extinguishing equipment

5.1.1 Composition Heat-sensitive fire extinguishing devices and heat-activated fire extinguishing devices should consist of an extinguishing agent storage container, an extinguishing agent sampling port, a heat-sensitive release component, and a leak detection system. It consists of a device, a signal feedback device (where applicable), an initiator (where applicable), etc. An electrically activated fire extinguishing device should consist of an extinguishing agent storage container, an extinguishing agent sampling port, a container valve, a leak detection device, and a signal feedback device (where applicable). It consists of nozzles, drive devices, etc.

5.1.2 Appearance

5.1.2.1 All components of the fire extinguishing device shall be free from any visible manufacturing defects or mechanical damage, and the outer surfaces of components treated with anti-corrosion measures shall be protected against corrosion. The coating and plating should be complete and uniform.

5.1.2.2 The nameplate shall be securely installed in a conspicuous location on the fire extinguishing device, and the content of the nameplate shall comply with the requirements of Chapter 8.

5.1.2.3 The warning sign for the fire extinguishing device shall be securely installed in a conspicuous location on the device. The warning sign shall state. "This device will decompose and produce [products] when used for fire extinguishing." "Produces a certain amount of hydrogen fluoride gas" The warning sign should be clearly readable at a distance of 3 meters under ambient light of 100lx to 500lx.

5.1.3 Main parameters of fire extinguishing equipment The main parameters of the fire extinguishing device shall comply with the provisions of Table 4.

5.1.4 Requirements for extinguishing agents and pressurized gases

5.1.4.1 Heptafluoropropane fire extinguishing agent shall comply with the provisions of GB 18614.

5.1.4.2 Hexafluoropropane fire extinguishing agent shall comply with the provisions of GB 25971.

5.1.4.3 The pressurized gas shall comply with the requirements of GB/T 8979.

5.1.5 Startup Method

5.1.5.1 Fire extinguishing devices should be equipped with an automatic start-up mode, and manual and mechanical emergency start-up modes may also be added.

5.1.5.2 The operating force of the mechanical emergency operating mechanism should not exceed 150N; the pulling operating force should not exceed 50N; and the pushing operating force should not exceed [missing value]. 10N; the operating stroke should not exceed 300mm. The release force of the safety device for mechanical emergency start-up should not exceed 100N.

5.1.6 Insulation Requirements Under normal atmospheric conditions, the insulation resistance between the external live terminals of the fire extinguishing device and the device itself should be greater than 20 MOmega. The insulation resistance between the power plug and the device should be greater than 50MOmega.

5.1.7 Vibration Resistance Requirements Vibration tests should be conducted according to the method specified in 6.5.No component of the fire extinguishing device should show signs of loosening, detachment, or structural damage. The extinguishing agent... The net weight loss should not exceed 0.5% of the extinguishing agent filling volume, and the pressure loss should not exceed 1% of the filling pressure. Automatic or manual activation should be performed after the test. The automatic fire extinguishing system should not malfunction.

5.1.8 Temperature Cycling Leakage Requirements When conducting a temperature cycling leak test as specified in 6.6, the net weight loss of the extinguishing agent in the extinguishing device should not exceed the filling weight of the extinguishing agent. The pressure loss should not exceed 1.5% of the filling pressure, and the fire extinguishing device should be automatically or manually activated after the test without any malfunction.

5.1.9 Concentration Distribution Performance The concentration distribution test shall be conducted according to the method specified in 6.7, and the fire shall be extinguished within 30 seconds after the discharge is completed.

5.1.10 Requirements for Localized Fire Extinguishing Applications

5.1.10.1 Requirements for localized Class B fire extinguishing When conducting a Class B fire extinguishing test according to the method specified in 6.8, the extinguishing device should extinguish the fire after the spraying is completed, and the fire in the oil pan should not splash. Oil discharge tray.

5.1.10.2 Requirements for localized Class A fire extinguishing The fire extinguishing test for Class A fires shall be conducted according to the method specified in 6.8.The fire extinguishing device shall extinguish the open flame after spraying and shall not reignite within 10 minutes.

5.2 Container

5.2.1 Nominal working pressure The nominal working pressure of the container should not be less than the maximum working pressure of the fire extinguishing device specified in Table 4.

5.2.2 Other performance Other performance characteristics of the container shall comply with the provisions of 5.1.1.1, 5.3.14.1,

5.3.14.4 in GB 25972-2024.

5.3 Container Valves

5.3.1 Nominal Working Pressure The nominal working pressure of the container valve should not be less than the maximum working pressure of the fire extinguishing device specified in Table 4.

5.3.2 Other performance Other performance characteristics of the container valve shall comply with 5.1.1.2, 5.3.15.2~5.3.15.5, and 5.3.15.7~

5.3.15.11 of GB 25972-2024. Regulation.

5.4 Safety relief device Fire extinguishing systems should be equipped with safety relief devices, which should comply with provisions

5.3.17.3 of GB 25972-2024. The provisions of 5.3.17.5. The operating pressure setting of the safety relief device should be no less than

1.25 times the maximum working pressure of the fire extinguishing device, but no greater than its strength test pressure. 95% of the force. The operating pressure range of the safety relief device is the set value × (1 ± 5%).

5.5.1 Appearance and Markings

5.5.1.1 When a fire extinguishing device uses a glass bulb or fusible element as the temperature sensing element, the nominal operating temperature and color marking of the temperature-sensing release assembly shall be specified. It should comply with the provisions of GB 5135.1-2019.

5.5.1.2 The manufacturer or trademark, model and specifications, and working pressure shall be permanently marked in a conspicuous location on the temperature-sensing release component.

5.5.2 Static operating temperature Perform the static operating temperature test according to the method specified in 6.11.The static operating temperature of the temperature-sensing release component shall comply with GB 5135.1- The provisions of

5.5.3 Strength Requirements The temperature-sensing release component should be subjected to a water pressure strength test according to the method specified in 6.11, and no leakage should occur. The test pressure is

1.5 times the maximum working pressure, and the pressure is maintained for 5 minutes.

5.5.4 Sealing Requirements Perform an airtightness test according to the method specified in 6.11, and there should be no air bubbles leaking from any of the connection and sealing parts. The test pressure is the maximum working pressure, and the pressure is maintained for 5 minutes.

5.5.5 Heat and pressure resistance requirements Perform heat and pressure resistance tests according to the method specified in 6.11.The temperature-sensing release component should not exhibit deformation, cracks, or damage. The test pressure is the maximum... High work pressure.

5.5.6 Requirements for heat resistance and cold shock resistance When subjected to heat and cold shock tests as specified in 6.11, the temperature-sensing release component should not exhibit deformation, cracks, or damage.

5.5.7 Impact resistance When subjected to mechanical impact testing as specified in 6.11, the temperature-sensing release component should not exhibit deformation, cracks, or damage.

5.5.8 Corrosion Resistance The corrosion resistance of the temperature-sensing release component shall comply with the provisions of

6.27 in GB 5135.1-2019.

5.6.1 Electrical Initiator

5.6.1.1 Basic Requirements When an electric ignition head is used as the ignition element in an electric initiator of a fire extinguishing device, at least two electric initiation elements should be used. The resistance value deviation of the electric initiator should not exceed ±0.5Omega.

5.6.1.2 Operating Voltage The operating voltage of the electric initiator should not exceed 24V (dc).

5.6.1.3 Starting Current The starting current of the electric initiator should not exceed the value published in the manufacturer's instruction manual.

5.6.1.4 Safe Current When performing the safety current test as specified in 6.12.1.3, the electric initiator should not activate, and the resistance value after the test should meet the requirements of 5.6.1.1. Require.

5.6.1.5 Electrostatic Sensitivity The test shall be conducted according to the method specified in 6.12.1.4, and the initiator shall not be activated during the test.

5.6.1.6 Operational reliability When tested according to the method specified in 6.12.1.5, the electric initiator should be able to operate reliably.

5.6.1.7 Stray Current The test shall be conducted according to the method specified in 6.12.1.6, and the electric initiator shall not be activated during the test.

5.6.1.8 Lifespan The test shall be conducted according to the method specified in 6.12.1.7, and the life of the electric initiator shall not be less than the effective service life of the thermal aerosol extinguishing agent generator. After the test, the electric initiator should be able to start normally and its performance should meet the requirements of

5.6.1.3 to 5.6.1.7.

5.6.1.9 Baseboard The electric initiator should use copper core lead wire or tin-plated copper core lead wire.

5.6.2 Thermal Initiator

5.6.2.1 Appearance The heat initiator should not have mold, damage, obvious oil stains, or fraying at the cut point.

5.6.2.2 Combustion rate The test shall be conducted according to the method specified in 6.12.2.2, and the combustion rate of the thermal initiator shall be in the range of 3 s/m to 10 s/m.

5.6.2.3 Combustion performance When tested according to the method specified in 6.12.2.3, the heat initiator should not have any interruption of flame, flame penetration, outer shell burning, or popping sounds during ignition.

5.6.2.4 Water resistance The test shall be conducted according to the method specified in 6.12.2.4.After the test, its combustion rate and combustion performance shall meet the requirements of

5.6.2.2 and 5.6.2.3.

5.6.2.5 High Temperature Resistance The test shall be conducted according to the method specified in 6.12.2.5.The thermal initiator shall not exhibit adhesion or shell cracking, and its combustion performance shall meet the requirements after the test. Requirements of 5.6.2.3.

5.6.2.6 Low-temperature resistance The test shall be conducted according to the method specified in 6.12.2.6.The thermal initiator shall not exhibit adhesion or shell cracking, and its combustion performance shall meet the requirements after the test. Requirements of 5.6.2.3.

5.7 Leak Detection Device

5.7.1 General Requirements Fire extinguishing equipment should have a leak detection device. The leak detection device should preferably have a leak alarm and a leak alarm signal output function.

5.7.2 Other requirements Other performance characteristics of the leak detection device shall comply with the provisions of

5.3.16 in GB 25972-2024.

5.8 Nozzle The nozzle shall comply with the provisions of GB 25972-2024, specifically 5.1.1.5, 5.4.1, 5.4.3~5.4.6, and 5.4.9.

5.9 Signal Feedback Device

5.9.1 Basic Requirements Fire extinguishing devices should be equipped with signal feedback devices, which should be able to provide feedback on the operation status of the devices.

5.9.2 Nominal Working Pressure The working pressure of the signal feedback device should not be less than the maximum working pressure of the fire extinguishing device specified in Table 4.

5.9.3 Motion Pressure The operating pressure setting of the signal feedback device should not exceed

0.5 times the minimum operating pressure of the fire extinguishing device. The force deviation should not exceed ±0.2MPa.

5.9.4 Other performance Other performance characteristics of the signal feedback device, such as self-locking function and operational reliability requirements, should comply with

5.1.1.2 of GB 25972-2024. According to the provisions of

5.11.3 to 5.11.9, signal feedback devices using a reduced-voltage action mode may not have a self-locking function.

5.10 Drive Unit

5.10.1 General Requirements The performance of the drive unit shall comply with the requirements of XF61, wherein the operating temperature range shall meet the requirements of Table 4.

5.10.2 Signal Feedback Requirements The signal feedback requirements of the drive device shall comply with the provisions of

5.9.2 in GB 25972-2024.

5.11 Suspension bracket (base)

5.11.1 General Requirements During the spraying process of the fire extinguishing device, the suspension bracket (seat) should not deform, detach, or fall off.

5.11.2 Load-bearing capacity The load-bearing capacity test shall be conducted according to the method specified in 6.17.The suspension bracket (base) shall be able to withstand three times the total mass of the fire extinguishing device without any deformation. Phenomena such as ring breakage or shedding.

5.11.3 Other performance Other properties of the suspension bracket (base), such as coating and salt spray corrosion resistance, should comply with

5.15.1 of GB 25972-2024. The provisions of 5.15.2.

5.12 Filling of extinguishing agent The filling of extinguishing agents in fire extinguishing devices shall comply with the provisions of XF1203.

6.4 Insulation Resistance Measurement

6.4.1 Test Equipment The testing equipment shall meet the following requirements.

a) Test voltage. 500V±50V;

b) Measurement range. 0MOmega~500MOmega;

c) Minimum graduation.

0.1 MOmega;

d) Timing. 60s±5s.

6.4.2 Test Procedure Under the standard atmospheric conditions specified in 6.1, using an insulation resistance test apparatus, apply a direct current of 500V ± 50V to the following parts of the sample respectively. Apply a current voltage for 60s ± 5s and measure the insulation resistance of the sample.

a) Between external live terminals with an operating voltage greater than 50V and the casing;

b) Between the power supply terminal or power wiring terminal with an operating voltage greater than 50V and the casing (power switch is in the ON position, power is not connected).

6.5 Vibration Test Conduct the test according to the method specified in

6.16 of GB 25972-2024 and record the test results.

6.6 Temperature Cycling Test Conduct the test according to the method specified in

6.17 of GB 25972-2024 and record the test results.

6.7 Concentration Distribution Test

6.7.1 Requirements for fire extinguishing equipment The fire extinguishing equipment is designed by the manufacturer and meets the following requirements.

a) The fire extinguishing device is filled with extinguishing agent at its maximum filling density;

b) The fire extinguishing device should be placed at the lowest operating temperature ±2°C for at least 16 hours;

c) Fire extinguishing equipment shall be installed in accordance with the manufacturer's specifications, ensuring that the extinguishing agent is not directly sprayed onto the test fire and does not ignite the fuel. Splash;

d) The spraying time of the fire extinguishing device should not exceed 10 seconds.

6.7.2 Fuel Requirements The test fuel is commercial-grade n-heptane, and its physicochemical properties should meet the following requirements.

a) Distillation range. 84°C~105°C;

b) Difference between initial and final boiling points. <=10°C;

c) Volume fraction of aromatic compounds. <=1%;

d) Density (at 15°C). 700kg/m3±20kg/m3.

6.7.3 Test Space The test space dimensions should be constructed according to the maximum protection area and maximum height published by the manufacturer. The actual test space dimensions should be based on the extinguishing agent filling volume and... Calculation of extinguishing concentration at 20°C (see Appendix A for extinguishing concentration). When there is actual leakage in the test space and the residual spray rate of the extinguishing device is not 0, the actual... The actual test space should be appropriately modified. The test space should be equipped with a self-closing overpressure relief vent (device). A closable vent directly opposite the fuel tank should be provided. Openings are provided to allow for ventilation before the fire extinguishing system is activated.

6.7.4 Test Instruments and Their Layout

6.7.4.1 Oxygen Concentration Measurement The location of the sampling points for measuring oxygen concentration in the experimental space is shown in Figure 2. The oxygen concentration analyzer should have a resolution of no less than 0.1% (volume fraction), be capable of continuous measurement, and have a test operating range of 17%~21% (volume fraction). (Fractions), accuracy should not be affected by combustion products.

6.7.4.2 Temperature Measurement The horizontal distance between the temperature measuring point and the center of the test space should be 850mm~1250mm, and the height above the ground should be... 0.5H. A 1mm K-type thermocouple should be used, and the time constant of the temperature measuring instrument should not exceed 1s, so that it can measure continuously.

6.7.5 Fuel Tank The fuel tank is made of steel and is circular, with an inner diameter of 80mm ± 5mm, a height of not less than 100mm, and a wall thickness of 5mm to 6mm. A pad is placed at the bottom of the fuel tank. The water and the upper n-heptane depth should be at least 50 mm, and the liquid level should be at least 40 mm from the fuel tank opening. There are a total of 8 fuel tanks, placed diagonally on the four walls of the test space, with four tanks placed at the top and four at the bottom, and the bottom corner fuel tanks placed on the ground, at a distance from the adjacent tanks. The distance from the wall is 50mm, the distance from the upper corner fuel tank opening to the ceiling is 300mm, and the distance from the adjacent wall is 50mm.

6.7.6 Test Ignite the fuel canister, pre-ignite for 30 seconds, then activate the fire extinguishing device.

6.8 Fire Extinguishing Test of Localized Fire Extinguishing Devices

6.8.1 Requirements for fire extinguishing equipment The fire extinguishing device shall be filled with extinguishing agent at the maximum filling density, and shall be placed at a temperature of 20°C±5°C for at least 16 hours. The manufacturer requires the installation of fire extinguishing systems.

6.8.2 Fuel Requirements The requirements for n-heptane fuel are the same as in 6.7.2. The wood used is spruce, fir, or pine of similar density, with a moisture content of 9% to 13%.

6.8.3 Test Space Fire extinguishing tests can be conducted outdoors, but the wind speed should not exceed 3 m/s. If the fire extinguishing test is conducted indoors, the indoor space volume should be greater than six cubic meters per second. The volume of the test space is twice that of the test space.

6.8.4 Experimental Model The selection of fire extinguishing oil pans and timber stacks is determined by the manufacturer. Fire extinguishing oil pans should be selected from Table 6, and timber stacks should preferably be selected from Table

5.This should be based on the actual fire extinguishing equipment. The test was conducted to assess the fire extinguishing capabilities.

6.8.5 Test

6.8.5.1 Class B fire extinguishing test Ignite the n-heptane in the fuel pan, pre-ignite for 30 seconds, and the fire extinguishing device will automatically or manually activate. Record the test results.

6.8.5.2 Class A fire extinguishing test The heptane in the ignition pan is ignited to set the wood stack ablaze. Once the fuel is exhausted, the wood stack burns freely. The total pre-combustion time outside the test space is [time missing]. After 6 minutes, pre-combustion ends, then manually activate the fire extinguishing device. Record the test results.

6.9 Performance Test of Container Valves The tests shall be conducted according to the methods specified in GB 25972-2024, specifically in sections 6.3~6.5, 6.23.1, 6.24, 6.7, 6.6, and 6.26~6.28.

6.10 Performance test of safety relief device The test shall be conducted according to the methods specified in sections 6.5~6.7, 6.17, and

6.39 of GB 25972-2024.The temperature cycling test cycle is one temperature. cycle.

6.11 Performance Test of Temperature Sensing Release Component Static operating temperature and corrosion resistance were tested according to methods

7.25 in GB 5135.1-2019; other properties were tested according to... The tests shall be conducted in accordance with the methods specified in 6.3, 6.4, and 6.43~

6.45 of GB 25972-2024. Heat and pressure resistance tests and heat and cold shock resistance tests were conducted after removing the temperature sensing element.

6.12.1 Basic performance test of electric initiator

6.12.1.1 Resistance Measurement 6.12.1.1.1 Test Equipment The resistance measuring instrument shall meet the following requirements.

a) Measuring range. 0.1Omega~30Omega;

b) Resolution. 0.1Omega;

c) Accuracy. 0.5% Ux ± 2 digits. 6.12.1.1.2 Test Procedure Place 10 electric initiators in an environment with a temperature of 20°C±2°C and a relative humidity of no more than 75% for at least 2 hours. When connected to a resistance meter, the measuring current should not exceed 2mA or the maximum current draw of each induction generator when measuring its resistance. 10% of the thermal current, taking the smaller of the two values. The average of 10 measurements is taken as the result.

6.12.1.2 Starting Current Measurement Connect the two leads of the electric initiator to the two ends of the constant current source respectively. Under the rated voltage, adjust the current output until the electric initiator operates. Test the electric initiator. The number of initiators is

10.The maximum value of the results from 10 experiments is taken as the measurement result.

6.12.1.3 Safety Current Measurement Connect the two leads of the electric initiator to the two ends of the constant current source respectively. Under the rated voltage, apply a current of.200mA to the electric initiator. When energized... The interval is 5 minutes. Ten electric initiators were used in the experiment. The operation of each of the ten electric initiators was recorded.

6.12.1.4 Electrostatic Sensitivity Test The effect of electrostatic discharge on an electro-initiator can be considered equivalent to a capacitor charged to a certain voltage, which, through a specified resistor, affects the electro-initiator. Discharge is performed. The principle of the electrostatic sensitivity test is shown in Figure 3.