ISO 9705 Room Corner Flammability Testing Equipment Burning Chamber

ISO 9705 Room Corner Flammability Tester Product Introduction:

GB/T 25207-2010 "Solid Room Combustion Fire Test Method for Surface Materials" is based on the oxygen consumption principle and is a combustion test standard compiled with reference to ISO 9705 "Full-size Room Test for Surface Materials". This test method uses the simulated corner fire scene as the standard test condition and stipulates that the installation of the test sample is carried out completely according to the actual use. It is currently the most reliable standard test method. Due to the relatively complex number of samples and test conditions required by this test, it is usually used in fire science research and the evaluation of the combustion characteristics of materials that cannot be correctly evaluated by small-scale tests. The test device consists of four parts, including a combustion chamber, a smoke collection and sample gas collection system, a gas analysis and data processing system, and a gas supply system. The test is carried out in a combustion chamber with a sample surface area of ​​approximately 21m2 and a door that is always open. The tested materials are installed according to actual usage. A right-angled triangle sand box burner is set at the contact point between the corner and the wall in the room. The fuel gas is propane gas. During the test, the gas flow rate needs to be controlled so that the standard heat output of the fire source is 100kW in the first 10 minutes. When the material does not flash, the gas flow rate is adjusted to increase the heat output to 300kW and continue for 10 minutes. During the total test period of 20 minutes, the test can be stopped if flashover occurs. The determination of the flashover phenomenon can be determined by observation and the test curve of the heat release rate. During the test, the main indicators tested are the total heat release, heat release rate, smoke generation, and smoke generation rate.

ISO 9705 Room Corner Flammability Tester Standards:

ISO 9705 Room Corner Flammability Tester Technical Specification:

ISO 9705 Room Corner Flammability Tester Features:

1. The complete set of equipment includes a combustion chamber, a flue gas collection and sample collection system, a gas analysis and data processing system, and a gas supply system;
2. The conical flue gas collector is installed directly above the weighing platform and the sample, with a bottom size of 3000mm X 3000mm and a height of 1000mm. The top of the conical flue gas collector is a square of 900mm X 900mm X 900mm. At the same time, two 500mm X 900mm steel plates are installed in the square at the top to form a flue gas mixer;
3. The shortest length of the stainless steel exhaust pipe is not less than 5000mm, the diameter is 400mm, and both ends are equipped with flue gas mixing devices;
4. The exhaust system has sufficient capacity to collect all the flue gas generated by the combustion test. The exhaust volume of the fan is continuously adjustable, and the exhaust rate is not less than 3.5m/s;
5. The exhaust fan is a centrifugal fan, the inner tank is made of stainless steel, the temperature resistance is not less than 300 degrees, and the frequency conversion fan is used for adjustment Speed;
6. The weighing device has a range of 0-5KG and an accuracy of not less than 0.1g;
7. The comprehensive measurement area is equipped with pressure probes, three thermocouples, gas sampling probes and smoke density measurement systems;
8. The sand box burner is filled with gravel with a particle size of 4mm-8mm and sand with a particle size of 2mm-3mm, and the top layer of the upper sand is flush with the upper edge of the burner;
9. The ignition of the sand box burner adopts the surface ignition method, and does not use ignition methods with low ignition success rate such as electric spark ignition.
10. Equipped with ultraviolet flame monitoring flameout protection device to ensure the safety of the system;
11. Mass flow controller, with a range of 0g/s-7g/s, a reading accuracy of not less than 1.5%, and a maximum output power of 300KW;
12. Flue gas sampling system, consisting of a soot filter, a compressor condenser, a drying column, a sampling pump and a flow meter, etc., should be able to ensure the effective collection of flue gas samples and the absorption of exhaust gas;
13. Imported diaphragm pump, sampling flow rate not less than 13L/min;
14. Imported flue gas The filter head is made of solid PTFE, with 0.5um glass fiber filter material inside;
15. Compressor condenser, cooling capacity 320KJ/h, dew point stability 0.1 degree, dew point static change 0.1K, cooling flow not less than 6L/MIN;
16. Imported rotor flowmeter, range 0-5L/min;
17. The comprehensive measuring device includes three imported OMEGA thermocouples, the contacts of which should be located on an arc with a radius of (87±5)mm from the axis, and the angle is 120°;
18. Bidirectional probe, connected to an imported pressure sensor with a range of at least (0-200)Pa and an accuracy of ±2Pa. The response time of the pressure sensor for 90% output is at most 1s;
19. The oxygen analyzer provided should be paramagnetic and can at least measure 02 with a concentration of 16%-21% (V/V). The response time of the oxygen analyzer should not exceed 12s. Within 30min, the drift and noise of the analyzer should not exceed 100×10-6. The output of the analyzer to the data acquisition system should have a maximum resolution of 100×10-6;
20. The carbon dioxide analyzer should be IR type and can at least measure CO2 with a concentration of 0%-10%. The linearity of the analyzer should be at least 1% of the full scale. The response time of the analyzer should not exceed 12s;
21. The smoke density measurement system is installed on the side pipe of the exhaust pipe with a flexible joint, and the incandescent lamp is used at a color temperature of (2900±100)K;
22. The optical measurement element has a measurement range of 400-750nm visible light range and a transmittance accuracy of 0.01%;
23. The 100% and 0% calibration methods of the optical measurement element are as follows: zero point calibration uses the incandescent light source to turn off, and the software clicks 0% to complete; 100% calibration is completed when the light path is unobstructed, and the neutral filter is not used to fit the light path data;
24. The device for measuring ambient atmospheric pressure has an accuracy of ±200Pa;
25. The data acquisition and analysis system ensures that the data acquisition is accurate and reliable, and the required data is automatically recorded every 3s; the software data calculation is correct and the results are valid. And can provide the following calibration and operation interface;
26. O2/CO2 analyzer calibration: O2/CO2 output noise and drift calibration; and result output form;
27. The software includes optical system calibration, flue gas measurement system noise and drift calibration and result output form;
28. The software includes optical system calibration, filter calibration and result output form;
29. The software includes air volume calibration, air volume control range calibration and result output form;
30. The software includes step calibration and result output form;
31. The software includes test procedures and result output form;
32. Equipped with computer and printer system.