Some standard content:
National Standard of the People's Republic of China
Test Methods for Fire Damper
Fire dampers-Tests
Subject Content and Scope of Application
GB15930--1995
This standard specifies the fire damper performance test items, test equipment, test procedures, judgment conditions and test reports. This standard applies to the test of fire dampers installed in ventilation and air-conditioning systems of industrial and civil buildings. 2 Reference Standards
GB/T2624 Flow measurement throttling device, measuring the flow of fluids filled in circular pipes with orifice plates, nozzles and venturi tubes GB9978 Fire resistance test methods for building components
3 Terms
Fire damper: A valve installed on the supply and return air ducts of ventilation and air-conditioning systems, which is usually open and closed when the gas temperature in the duct reaches 70°C during a fire. It can meet the requirements of fire resistance stability and fire resistance integrity within a certain period of time and acts as a smoke and fire barrier. 4 Test items
This standard includes the following five tests:
Temperature sensor test;
Close reliability test;
Salt spray test;
Air leakage test at ambient temperature;
Fire resistance test.
5 Test equipment, steps and judgment conditions
5.1 Temperature sensor test
5.1.1 Test equipment
The test equipment includes a water bath with a heater and a stirrer and necessary control and measuring instruments. The accuracy of the instrument for measuring water temperature should not be less than ±0.5℃. 5.1.2 Test steps
5.1.2.1 Non-action test
Heat the water in the water bath with a heater and start the stirrer at the same time. When the water temperature reaches 65±0.5℃, keep the temperature constant. Immerse the temperature sensing element of the temperature sensor completely in water for 5 minutes.
5.1.2.2 Action test
Take out the temperature sensor, cool it naturally to room temperature, and continue to heat the water to 73±0.5℃ with a heater to maintain constant temperature. Immerse the temperature sensing element of the temperature sensor completely in water.
Approved by the State Administration of Technical Supervision on December 20, 199554
Implemented on June 1, 1996
5.1.3 Judgment conditions
GB15930—1995
In constant temperature water of 65±0.5℃, the temperature sensor does not act for 5 minutes, and in constant temperature water of 73±0.5℃, the temperature sensor acts within 1 minute, which means it is qualified.
5.2 Closing reliability test
5.2.1 Test steps
Fix the test piece on the test bench, open the valve, and then start the operating mechanism to close the test piece. Repeat this operation 250 times in total. For test pieces with several different start-up modes, the number of 250 operations should be evenly distributed. For test pieces with adjustment functions, the test should be conducted at the maximum and minimum opening positions respectively, and the number of operations should be evenly distributed. 5.2.2 Judgment conditions
During the 250 closing operations, the test piece should be able to close flexibly and reliably from the open position, and each component should not have obvious deformation, wear and other damage that affects its sealing performance.
5.3 Salt spray test
5.3.1 Test equipment
A salt spray box or salt spray chamber is usually used.
The materials in the salt spray box (chamber) should not affect the corrosion performance of the salt spray; the salt spray shall not be sprayed directly on the test piece; the condensed salt water on the top of the box (chamber) shall not drip on the test piece; the salt water flowing down from the four walls of the equipment shall not be reused. The salt spray box (chamber) should be equipped with air conditioning equipment to control the air temperature in the box (chamber) within the range of 35±2℃ and the relative humidity greater than 95%. The salt solution is composed of chemically pure sodium chloride and distilled water, with a weight concentration of (5 ± 0.1)%, and the pH value is controlled between 6:5 and 7.2. The amount of fog is controlled within the range of 1~2mL/(h·80cm2), and is produced by a nozzle with a pressure of 0.08~0.14MPa, and the diameter of the fog particles is 1~5μm, accounting for more than 85%.
5.3.2 Accuracy of measuring instruments
The measuring instruments should achieve the following accuracy:
Temperature: ±0.5℃
Humidity: ±2%
Acidity: ±0.1pH
5.3.3 Test steps
Before the test begins, use detergent to clean all grease on the surface of the test piece. Place the test piece in the salt spray chamber (room), with the opening of the test piece facing upward, and make the axis of each valve plate of the test piece form an angle of 15°~30° with the horizontal plane. During the test, the specimen is in the open state, with a cycle of 24 hours, first spray continuously for 8 hours, then stop for 16 hours, and test five cycles in total. During spraying, the temperature in the box (room) is maintained at 35±2℃ and the relative humidity is greater than 95%; when spraying is stopped, no heating is performed, the salt spray box (room) is closed, and it is cooled naturally.
5.3.4 Judgment conditions
After the test, take out the specimen and dry it at room temperature for no less than 24 hours. Carry out a closing test on the specimen. If it can still be reliably closed from the open position, it is qualified.
5.4 Air leakage test at ambient temperature
5.4.1 Test device
The test device includes two parts: gas flow measurement system and pressure measurement and control system. 5.4.1.1 Gas flow measurement system
The gas flow measurement system consists of connecting pipes, gas flowmeter and induced draft fan system. Connecting pipe: The test piece is connected to the gas flow meter through the connecting pipe. The connecting pipe is made of steel plate with a thickness of not less than 1.6mm. The width and height of the pipe opening should correspond to the size of the test piece. The length of the pipe is twice the diagonal of the test piece opening, and the longest is 2m. Gas flow meter: The gas flow meter should use a standard orifice plate. The processing, manufacturing and installation of the orifice plate should comply with the provisions of GB/T2624 standard. A gas flow regulator should be installed at the front end of the front measuring pipe. 55
GB15930-—1995
Induced draft fan system: including induced draft fan, air inlet valve, regulating valve and flexible pipe connecting gas flow meter and induced draft fan 5.4.1.2 Pressure measurement and control system
The pressure before and after the test piece is measured by a pressure sensor, and the pressure outlet should be on the center line of the side of the pipe. The pressure difference before and after the test piece is adjusted and controlled by the air inlet valve and regulating valve.
5.4.2 Accuracy of measuring instruments
The measuring instruments shall have the following accuracy:
Temperature: ±2.5℃;
Pressure: ±5 Pa;
Flow rate: ±2.5%.
5.4.3 Test steps
5.4.3.1The test piece is installed in place and in a closed state, and its entrance is sealed with a non-leaking material. Start the induced draft fan, adjust the air inlet valve and the regulating valve so that the gas pressure difference before and after the test piece is 300Pa. After stabilization for 60s, measure and record the differential pressure on both sides of the orifice plate, the gas pressure before the orifice plate, and the gas temperature in the measuring tube after the orifice plate. Calculate the gas flow rate under this state according to the provisions of GB/T2624 standard. This flow rate is the system leakage. At the same time, measure and record the atmospheric pressure at the time of the test. 5.4.3.2 Remove the seal at the entrance of the test piece, and the test piece is still in a closed state. Adjust the air inlet valve and regulating valve so that the gas pressure difference before and after the test piece remains at 300Pa. After stabilization for 60s, measure and record the differential pressure on both sides of the orifice plate, the gas pressure in front of the orifice plate, and the gas temperature in the measuring tube behind the orifice plate. Calculate the gas flow rate under this state according to the calculation formula in the GB/T2624 standard. This flow rate is the air leakage of the whole test piece. At the same time, measure and record the atmospheric pressure at the time of the test. 5.4.3.3 The calculation formula for the air leakage of the test piece at ambient temperature is: Q=Q标2 —Q标
Q标2 = Q, × 273+ T,
Q标1 = Q × 273+T
Where: Q—
Air leakage of the test piece at ambient temperature (standard state), Nm\/h; B, -P2
101325
101325
Q mark--the whole machine air leakage of the test piece at ambient temperature (standard state), Nm/h; Q2--the whole machine air leakage of the test piece measured according to 5.4.3.2, m/h; Pz--the gas pressure in front of the orifice plate when the whole machine air leakage of the test piece is measured according to 5.4.3.2, Pa; T2bZxz.net
the gas temperature in the pipeline when the whole machine air leakage of the test piece is measured according to 5.4.3.2, ℃; B2--according to 5.4. 3.2 Atmospheric pressure at the time of the whole machine leakage of the test piece, Pa; Q mark 1 - system leakage at ambient temperature (standard state), Nm/h; Q - measured system leakage according to 5.4.3.1, m/h, P1 - gas pressure in front of the orifice plate when measuring the system leakage according to 5.4.3.1, Pa; T1 - gas temperature in the measured pipeline when measuring the system leakage according to 5.4.3.1, ℃; B - atmospheric pressure at the time of measuring the system leakage according to 5.4.3.1, Pa. 5.4.4 Judgment conditions
The air leakage per unit area of the test piece at ambient temperature (standard state) should not be greater than 700Nm/(h*m*). 5.5 Fire test
5.5.1 Test device
The fire test device consists of four parts: a fire test furnace, a gas flow measurement system, a temperature measurement system, and a pressure measurement and control system.
GB15930--1995
There is a connecting pipe made of a steel plate with a thickness of not less than 1.6mm between the test furnace and the test piece. The opening size corresponds to the size of the test piece, and the outer surface of the pipe is insulated with fire-resistant insulation materials. 5.5.1.1 Fire test furnace
The fire test furnace can meet the requirements of Article 2.1 of GB9978 and the heating conditions specified in Article 3.1. 10 minutes after the start of the test, the pressure of 15±5Pa should be maintained in the furnace on the horizontal center line where the test piece is installed. 5.5.1.2 Gas flow measurement system
The gas flow measurement system is the same as that in 5.4.1.1. 5.5.1.3 Temperature measurement system
The temperature of the fire surface of the test piece (hereinafter referred to as furnace temperature) is measured by a thermocouple with a diameter of 0.75~~1.00mm, and its hot end should extend out of the porcelain tube by no less than 25mm. The number of thermocouples shall not be less than five, one of which is located in the center of the test piece, and the others are located in the center of each quarter of the area of the test piece. The closest distance between the measuring point and the test piece is 100mm. The temperature of the gas in the pipeline is measured by an armored thermocouple with a diameter of 0.3mm. The measuring point is located on the center line of the measuring tube behind the orifice plate, and the distance from the orifice plate is twice the diameter of the measuring tube. 5.5.1.4 Pressure measurement and control system
The pressure measurement and control system is the same as that in 5.4.1.2. 5.5.2 Accuracy of measuring instruments
The measuring instruments shall achieve the following accuracy:
Temperature: furnace temperature ±15℃;
other ±5℃;
Pressure: ±5Pa;
Flow rate: ±2.5%;
Time: ±10s.
5.5.3 Installation of test pieces and fire conditions
5.5.3.1 Installation
The installation of test pieces shall reflect their actual use. For the test pieces, they shall be installed outside the test furnace, and connected to the test furnace through the vertical partition member through the front connecting pipe of the test piece. The test partition member shall be consistent with the actual use. When it cannot be determined, concrete or brick structure with a density of not less than 450kg/m2 can be selected. The thickness of the partition member shall not be less than 100mm. When making the partition member, conventional curing and drying treatment shall be carried out. 5.5.3.2 Fire conditions
The fire resistance test shall be conducted from both sides of the specimen. If the specimen is symmetrical, one side may be tested; if the fire-weak side can be determined in advance, only the fire-weak side may be tested. 5.5.4 Test steps
5.5.4.1 The specimen is installed in place and in the open state. The induced draft fan system is adjusted to make the air flow pass through the specimen at a speed of 0.15m/s to stabilize the air flow.
5.5.4.2 The test furnace is ignited. When the center temperature of the specimen receiving the fire reaches 50℃, the test starts. The temperature rise of the specimen receiving the fire is controlled to reach the temperature rise condition in Article 3.1 of GB9978.
5.5.4.3 Record the closing time of the specimen. After the specimen is closed, adjust the induced draft fan system to keep the gas pressure difference before and after the specimen within the range of 300±15Pa.
5.5.4.4 10 minutes after the start of the test, control the furnace pressure within the range of 15±5Pa. 5.5.4.5 Measure and record the differential pressure value on both sides of the orifice plate, the gas pressure in front of the orifice plate and the gas temperature in the measuring tube behind the orifice plate, with the time interval not exceeding 2 minutes. Calculate the gas flow rate of the orifice plate at each moment according to the calculation formula in the GB/T2624 standard. 5.5.4.6 Measure and record the atmospheric pressure during the test. 5.5.4.7 The calculation formula for the air leakage of the specimen during the fire resistance test is: 57
GB15930—1995
Q = Q标3 — Q标1
Q标3=Q:× 273+T,
Air leakage of the test piece during the fire test (standard state), Nm~/h; where: Q--—
Qb3—
B3—P3
101325
Air leakage of the whole test piece during the fire test (standard state), Nm\/h; Q3—Air leakage of the whole test piece at each moment of the fire test measured in accordance with Article 5.5.4.5, m/h; P:——Gas pressure before the orifice plate at each moment measured in accordance with Article 5.5.4.5, Pa; —Gas temperature in the measuring tube behind the orifice plate at each moment measured in accordance with Article 5.5.4.5, ℃; T3—
-Atmospheric pressure during the fire test, Pa; System air leakage (standard state) calculated according to Formula (3) in 5.4.3.3, Nm/h. 5.5.5 Judgment conditions
When any of the following conditions occurs during the test, it indicates that the test piece has lost its fire resistance: the test piece cannot be closed automatically within 1 minute after the start of the test; a.
The air leakage per unit area of the test piece (standard state) is greater than 1000Nm/(h·m2). b.
6 Test report
The test report should include the following contents:
Name of the test entrusting unit;
Name of the manufacturer and product model and specifications; Sample delivery form;
Standard number;
Test date;
Simplified diagram of the test piece structure, materials used, technical data, installation and other relevant instructions, test data;
Observation records;
Test conclusion;
Signature of the test host and the person in charge of the test unit, and seal of the test unit. Additional notes:
This standard is proposed by the Ministry of Public Security of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Fire Protection Standardization. This standard was drafted by the Tianjin Fire Science Research Institute of the Ministry of Public Security. The main drafters of this standard are Li Junjian, Zhou Guoping, Yang Zhaolin, Tian Lanyun, Ji Xiangan, and Jie Fenglan. 58
·（4)4 Test steps
5.5.4.1 The test piece is installed in place and in the open state. The induced draft fan system is adjusted to make the air flow pass through the test piece at a speed of 0.15m/s to make the air flow stable.
5.5.4.2 The test furnace is ignited. When the center temperature of the test piece's fire surface reaches 50℃, the test starts. The temperature rise of the test piece's fire surface is controlled to reach the temperature rise condition of Article 3.1 of GB9978.
5.5.4.3 Record the closing time of the test piece. After the test piece is closed, adjust the induced draft fan system to keep the gas pressure difference before and after the test piece within the range of 300±15Pa.
5.5.4.4 After 10 minutes from the start of the test, control the furnace pressure within the range of 15±5Pa. 5.5.4.5 Measure and record the differential pressure value on both sides of the orifice plate, the gas pressure before the orifice plate, and the gas temperature in the measuring tube after the orifice plate. The time interval is not more than 2 minutes. Calculate the gas flow rate of the orifice plate at each time according to the calculation formula in GB/T2624 standard. 5.5.4.6 Measure and record the atmospheric pressure during the test. 5.5.4.7 Calculation formula for air leakage of the test piece during the fire test: 57
GB15930—1995
Q = Q标3 — Q标1
Q标3=Q:× 273+T,
Air leakage of the test piece during the fire test (standard state), Nm~/h; where: Q--—
Qb3—
B3—P3
101325
Air leakage of the whole test piece during the fire test (standard state), Nm\/h; Q3—Air leakage of the whole test piece at each moment of the fire test measured in accordance with Article 5.5.4.5, m/h; P:——Gas pressure before the orifice plate at each moment measured in accordance with Article 5.5.4.5, Pa; —Gas temperature in the measuring tube behind the orifice plate at each moment measured in accordance with Article 5.5.4.5, ℃; T3—
-Atmospheric pressure during the fire test, Pa; System air leakage (standard state) calculated according to Formula (3) in 5.4.3.3, Nm/h. 5.5.5 Judgment conditions
When any of the following conditions occurs during the test, it indicates that the test piece has lost its fire resistance: the test piece cannot be closed automatically within 1 minute after the start of the test; a.
The air leakage per unit area of the test piece (standard state) is greater than 1000Nm/(h·m2). b.
6 Test report
The test report should include the following contents:
Name of the test entrusting unit;
Name of the manufacturer and product model and specifications; Sample delivery form;
Standard number;
Test date;
Simplified diagram of the test piece structure, materials used, technical data, installation and other relevant instructions, test data;
Observation records;
Test conclusion;
Signature of the test host and the person in charge of the test unit, and seal of the test unit. Additional notes:
This standard is proposed by the Ministry of Public Security of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Fire Protection Standardization. This standard was drafted by the Tianjin Fire Science Research Institute of the Ministry of Public Security. The main drafters of this standard are Li Junjian, Zhou Guoping, Yang Zhaolin, Tian Lanyun, Ji Xiangan, and Jie Fenglan. 58
·（4)4 Test steps
5.5.4.1 The test piece is installed in place and in the open state. The induced draft fan system is adjusted to make the air flow pass through the test piece at a speed of 0.15m/s to make the air flow stable.
5.5.4.2 The test furnace is ignited. When the center temperature of the test piece's fire surface reaches 50℃, the test starts. The temperature rise of the test piece's fire surface is controlled to reach the temperature rise condition of Article 3.1 of GB9978.
5.5.4.3 Record the closing time of the test piece. After the test piece is closed, adjust the induced draft fan system to keep the gas pressure difference before and after the test piece within the range of 300±15Pa.
5.5.4.4 After 10 minutes from the start of the test, control the furnace pressure within the range of 15±5Pa. 5.5.4.5 Measure and record the differential pressure value on both sides of the orifice plate, the gas pressure before the orifice plate, and the gas temperature in the measuring tube after the orifice plate. The time interval is not more than 2 minutes. Calculate the gas flow rate of the orifice plate at each time according to the calculation formula in GB/T2624 standard. 5.5.4.6 Measure and record the atmospheric pressure during the test. 5.5.4.7 Calculation formula for air leakage of the test piece during the fire test: 57
GB15930—1995
Q = Q标3 — Q标1
Q标3=Q:× 273+T,
Air leakage of the test piece during the fire test (standard state), Nm~/h; where: Q--—
Qb3—
B3—P3
101325
Air leakage of the whole test piece during the fire test (standard state), Nm\/h; Q3—Air leakage of the whole test piece at each moment of the fire test measured in accordance with Article 5.5.4.5, m/h; P:——Gas pressure before the orifice plate at each moment measured in accordance with Article 5.5.4.5, Pa; —Gas temperature in the measuring tube behind the orifice plate at each moment measured in accordance with Article 5.5.4.5, ℃; T3—
-Atmospheric pressure during the fire test, Pa; System air leakage (standard state) calculated according to Formula (3) in 5.4.3.3, Nm/h. 5.5.5 Judgment conditions
When any of the following conditions occurs during the test, it indicates that the test piece has lost its fire resistance: the test piece cannot be closed automatically within 1 minute after the start of the test; a.
The air leakage per unit area of the test piece (standard state) is greater than 1000Nm/(h·m2). b.
6 Test report
The test report should include the following contents:
Name of the test entrusting unit;
Name of the manufacturer and product model and specifications; Sample delivery form;
Standard number;
Test date;
Simplified diagram of the test piece structure, materials used, technical data, installation and other relevant instructions, test data;
Observation records;
Test conclusion;
Signature of the test host and the person in charge of the test unit, and seal of the test unit. Additional notes:
This standard is proposed by the Ministry of Public Security of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Fire Protection Standardization. This standard was drafted by the Tianjin Fire Science Research Institute of the Ministry of Public Security. The main drafters of this standard are Li Junjian, Zhou Guoping, Yang Zhaolin, Tian Lanyun, Ji Xiangan, and Jie Fenglan. 58
·（4)
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