【 Weak current College 】 exhaust test method for fire dampers

1 topic content and scope of application

This standard establishes the fire damper performance test project, test equipment, test procedures, conditions and test reports.

This standard is applicable to industrial and civil buildings, ventilation, air conditioning system installed in the test of fire dampers.

2 pilot project

This standard includes the following five pilot:

A £ ® temperature sensors test;

B £ ® closes the reliability testing;

C £ ® salt spray test;

D £ ® environment at the temperature of air leakage test;

Fire resistance test e..

3 reference standards

GB/T2624 flow measurement throttle device using orifice, nozzle and venturi tubes filled with measurement of fluid flow

GB9978 building elements fire resistance test methods

4 terminology

5 test devices, procedures, and judging criteria

5.1 temperature sensors test

5.1.1 test device

Test equipment including a blender with a heater and water bath as well as the necessary control and measuring instruments.

Measuring the temperature of the precision instruments should not be less than ± 0.5 ℃.

5.1.2 test steps

5.1.2.1 does not act test

Water bath heater for water heating in, and start mixing, when the water reached 65 ± 0.5 ° c remain constant. The temperature sensor of temperature sensor components completely immersed 5min.

5.1.2.2 action test

Check out temperature sensors, natural cooling to room temperature, the water heater will continue to be heated to 73 ± 0.5 ℃, maintaining a constant temperature. The temperature sensor of temperature sensor components completely immersed in the water.

5.1.3 determining conditions

In the 65-soil 0.5 ° c, constant temperature water temperature sensors 5min not action 73 Shi 0.5 ℃ temperature water temperature sensors in action, namely the lmin.

5.2 off reliability testing

5.2.1 test steps

The specimen fixed on the test bench, open the valve, and then start the operating organization, so that the specimen is closed. So repeatedly for a total of 250 times.

For has several different startup mode of the test sample, it should be a balanced distribution of 250 operation times. For a regulation of the specimen, respectively, the maximum and minimum open position do testing, and distribution operations.

5.2.2 conditions

In 250-close operation, the specimen should be can't open position flexible and reliable manner, all parts should be shut down without apparent deformation, wear and other implications damage its sealing properties.

5.2 salt spray test

5.3.1 test device

Usually uses the salt spray Chamber or salt spray Chamber.

Salt spray Chamber (e) the material shall not affect the salt spray corrosion; salt spray directly on the Jet in the sample; the top of the box (e) the condensed liquid not drip on the specimen; the walls from the equipment of the liquid shall not be reused.

Salt spray Chamber (e) should have the air conditioning equipment, energy control box (e) the air temperature is 35, 2 ° c, relative humidity of 95% of dry.

Salt water solution consists of the chemical composition of pure sodium chloride and distilled water, its weight concentration (5 soil 0.1) per cent pH control in 6.5 — 7.2.

Control the volume down a fog 2mL/l (h.80cm2) range from pressure 0.08 — 0.14MPa nozzle, spray particle diameter at l a 5 μ m accounted for 85 percent.

5.3.2 measuring instrument accuracy

A measuring instrument shall meet the following accuracy:

Temperature: soil 0.5?

Humidity: Earth 2%

Acidity: Shi 0.1pH

5.3.3 test steps

Test the application before the start of the specimen surface in detergent all oil cleaning. The specimens placed in salt spray Chamber (room), the opening up of the specimen and the specimen) valve slice of the horizontal axis and are into 150 a 300 angle.

Test, the specimen is open to 24h cycle, the first continuous spray 8h, then stop 16h, total test five cycles.

Spray, box (e) maintain a temperature of 35 ° c, relative humidity, 2 greater than 95 per cent; stop spray, no heating, off salt spray Chamber (room), natural cooling.

5.3.4 conditions

After the end of the test, remove the specimen, the drying time at room temperature for a period of not less than 24h. To close the test specimens, such as still reliable from the open position is off.

5.4 environment at the temperature of air leakage test

5.4.1 test device

Test devices including gas flow measurement system and pressure measurement and control systems in two parts.

5.4.1.1 gas flow measurement system

Gas flow measurement system by connecting pipeline, gas flow meter and fan system.

Connection pipes: specimen by connecting pipelines and Gas flowmeter, connecting pipeline selection is not less than the thickness of plate manufacturing 1.6mm, pipe opening width and height should be the size of the specimen, the length of the pipeline as part of the second times the diagonal openings for up to 2 m.

Gas flow meter: gas meter use standard orifice. Orifice plate processing manufacture installment shall conform to GB/T2624 standards. In the front end before measuring tube should be equipped with gas flow regulator.
R > fan system: including fan, air intake valve, control valve and connecting Gas flowmeter and flexible pipe fan.

5.4.1.2 pressure measurement and control system

Sample before and after the pressure by a pressure sensor to measure the pressure in the pipeline to import export should be on the side of the centre line. Sample before and after the pressure difference through the intake valve and the valve control.

5.4.2 the accuracy of measuring instruments

Measuring instrument should achieve the following accuracy:

Temperature: soil 2.5 ℃;

Pressure: Shi 5Pa;

Flow rate: Shi 2.5 per cent.

5.4.3 test steps

5.4.3.1 specimen installation, and is off, its entrance with no leakage of sealing materials. Launch fan, adjust the intake valve and the valve so that the samples before and after the gas pressure differential for 300Pa, stable measurement and record 60s back orifice on either side of the differential pressure, gas pressure orifice plate before and after the measuring tube of the gas temperature. Follow GB/T2624 standard provisions calculated in the State of gas flow, the flow volume of air leakage for the system. At the same time, the measurement and recording of test time of atmospheric pressure.

5.4.3.2 removal of seals at the entrance of the specimen, the specimen is turned off. Adjust the intake valve and the valve so that the samples before and after the gas pressure difference remains stable at 300Pa, 60s measure and record the orifice plate after the sides of the differential pressure, gas pressure orifice plate before and after the measuring tube gas temperature. Follow GB/T2624 standard calculation formula to calculate this state of gas flow, the flow volume of air leakage for the complete sample. At the same time, the measurement and recording of the test time of atmospheric pressure.

5.4.3.3 environment temperature specimen of air leakage calculation formula:

Type: Q-environment temperature specimen of air leakage (standard), Nm3/h

Q-2 — ambient temperature when the amount of total air leakage test (standard), Nm3/h

Q2-press section of the sample measured 5.4.3.2 overall air leakage rate, m3/h;

P2-article by 5.4.3.2 testware real leakage flow orifice plate machine in front of the gas pressure, Pa;

T2 — according to article real 5.4.3.2 testware total air leakage volume pipeline gas temperature, ° c;

B2-article by 5.4.3.2 testware real leakage of time machine to atmospheric pressure, Pa;

Q-l-environment temperature air leakage rate of system (standard), Nm3/h;

Ql-press section of the system measured 5.4.3.1 air leakage rate, m3/h

Pl-measurement system shall by 5.4.3.I air flow orifice plate in front of the gas pressure, Pa;

T1-press section monitoring system leakage 5.4.3.1 content measurement in pipeline gas temperature, ° c;

Bl-article by 5.4.3.1 measurement system of air leakage in the air pressure at all times, Pa.

5.4.4 judging criteria

Specimen at ambient temperatures of the air leakage rate per unit area (standard) is somewhat dry 700Nm3/(h · m3).

5.5 fire resistance test

5.5.1 test device

Fire resistance test device from fire test furnace, gas flow measurement system, temperature measurement system and pressure measurement and control systems of four parts.

In a test furnace and between a specimen with a thickness of not less than 1.6mm plate manufacturing connection pipe, its open size and corresponds to the size of the specimen, the pipe outer surface of the refractory and insulating materials for insulation.

5.5.1.1 fire test furnace

Fire test furnace can achieve GB9978 in 2.1 requirements and 3.1 of warming conditions. Trial begins after the furnace inner 10min install specimen of horizontal center line should maintain pressure on soil 5Pa 15.

5.5.1.2 gas flow measurement system

Gas flow measurement system and the same 5.4.1.1.

5.5.1.3 temperature measurement system

Specimen under fire surface temperature (temperature), a diameter of 0.75 1.00mm thermocouple, its hot-end should be put out less 25mm porcelain. The number of thermocouple shall not be less than five, one located in the Centre of the specimen, the rest are located in the quarter of the size of the specimen, the specimen measuring point and the nearest distance is 100 mm.

Pipeline gas used diameter mm pin thermocouple measurements. Measurement point is at the orifice of the Center after measuring pipe line, and the distance measurement orifice tube diameter of 2 times.

5.5.1.4 pressure measurement and control system

Pressure measurement and control system and the same 5.4.1.2.

5.5.2 measurement instrument accuracy

Measuring instrument should achieve the following accuracy:

Temperature: 15 ° c; the temperature of Earth

Other soil 5 ℃;

Pressure; soil 5Pa;

Flow rate: soil 2.5 per cent;

Time: soil l0s.

5.5.3 specimen installed and under fire conditions

5.5.3.1 installation

Installation of the specimen should reflect its actual use. For discussion of the specimen, the seat is installed on a test furnace, the specimen before connecting pipeline through vertical separator widget and test furnace.

Test used to separate the widget should be consistent with the actual use phase, when its not sure, you can choose the density is not less than450kg/m3 of concrete or brick structure. Delimited component of a thickness of not less than 100mm, making separate components, you should carry out regular maintenance and dry handling.

5.5.3.2 under fire conditions

Fire resistance test should be separately from the two sides of the specimen.

If the specimen structure symmetry that can be tested on one side; if prior to their fireproof weak surface, also weak surface only on fire.
5.5.4 test steps

5.5.4.1 specimen installation and is on the regulation of the airflow fan system to 0.15m/s through the specimen, the air is stable.

5.5.4.2 test furnace ignited when the specimen under fire surface Center temperature reached 50 ° c to test the start time, control specimen under fire surface temperature reached GB9978 in 3.1 warming conditions.

5.5.4.3 records the closure of the specimen, the specimen close time adjust fan system, so that the sample gas pressure difference before and after at 300 soil 15Pa range.

5.5.4.4 trial begins 10min, control of furnace pressure in 15 soil 5Pa range.

5.5.4.5 measurement and record the orifice surrounding differential pressure value, orifice of gas pressure before and after the measurement orifice tube gas temperature, time interval not greater than 2min. Follow GB/T2624 standard calculation formula to calculate the moment of orifice gas flow.

5.5.4.6 measurement and record test the air pressure in the process.

5.5.4.7 fire resistance test of air leakage when the specimen volume calculation formula:

Type: Q-fire resistance test of air leakage when specimens (standard), Nm3/h;

Q-3-fire-resistant test specimen of the whole air leakage (standard), Nm3/h;

Q3 – article by 5.5.4.5 fire resistance test of all measured at the amount of air leakage test machine, m3/h;

P3-press section of the measured 5.5.4.5 moments before the gas pressure orifice plate, Pa;

T3-press section of the measured 5.5.4.5 moments after measurement orifice tube gas temperature, ° c;

B3-fire resistance test of atmospheric pressure, Pa;

Q-1 — according to 5.4.3.3 formula (3) calculate the amount of system air leakage (standard), Nm3/h.

5.5.5 judging criteria

Test the following provisions appear in either case, indicates that the specimen has lost the fire resistance:

A £ ® test after the start of the test piece does not within 1min close automatically;

B £ ® specimen volume per unit area of air leakage (standard) is greater than 1000Nm3/(h · m2).

6 test report

Test report should include the following:

A £ ® name of the test organization entrusted;

B £ ® manufacturer name and model and specifications;

C £ ® delivers the form;

D £ ® standard number;

Test date; e.

F £ ® specimen structure diagram, use the material, technical data, installation and other relevant documentation;

Experimental data; g.

Observation records; h.

I £ ® test conclusions;

Test facilitator and j. test unit test units, signature stamp.

Fire dampers: installation in ventilation, air conditioning system, ventilation pipes, usually is opened, a fire when the pipeline gas temperature 70 ° c off, in a certain period of time to meet fire resistance requirements for stability and fire, play the role of fire across the smoke.