-
E-mail
1612337969@qq.com
-
Phone
15817783528
-
Address
279-2 Dabutou Village, Nandafu Community, Guanlan Street, Longhua New District, Shenzhen
Shenzhen Chuantian Precision Technology Co., Ltd
1612337969@qq.com
15817783528
279-2 Dabutou Village, Nandafu Community, Guanlan Street, Longhua New District, Shenzhen
This standard specifies the test method for the burn through resistance of insulation and sound insulation materials under high-intensity open flames.
This standard is applicable for evaluating the burn through resistance of insulation and sound insulation materials under high-intensity open flames.
1. Complies with GB/T225352-2010.
2. Compliant with the Federal Aviation Regulation FAR25 in the United States.
3. Complies with the Chinese Civil Aviation Transport Aircraft Standard CCAR-25-R4.
1. Laboratory: The length and width of the laboratory floor should not be less than 3.05m.
2. The combustion burner is controlled by a motor and can move forward and backward.
3. The burner extension cone should be installed at the end of the ventilation pipe, with a length of 305 ± 3mitt.
The conical cylinder of the burner should have an opening with a width of 280 ± 3mm and a height of 152 ± 3mm.
4. The fuel rail can be adjusted to position the fuel nozzle 8mm away from the front end of the outlet fixing plate.
The outlet fixing plate should be installed at the end of the ventilation pipe.
5. The internal fixing plate should be located in the middle of the ventilation pipe, 95mm away from the tip of the fuel nozzle.
The fixing plate should be adjusted so that when looking into the ventilation duct, the entire igniter is located in the middle position between 10 o'clock and 11 o'clock.
If the temperature and heat flow rate meet the requirements of 6.4 and 6.5, small deviations in the igniter angle are allowed.
6. The fan should be cylindrical with a diameter of 133mm and a height of 89mm.
7. The burner extension cone should be installed at the end of the ventilation pipe, with a length of 305 ± 3mitt.
The conical cylinder of the burner should have an opening with a width of 280 ± 3mm and a height of 152 ± 3mm.
8. Fuel: Fuel should be JP-8, Jet A, or internationally equivalent fuel. The flow rate should be 0.378 0 ± 0.012 6L/min.
If the fuel cannot be obtained, when the nominal flow rate, temperature, and heat flow values of the fuel meet the standard requirements, No. 3 jet fuel or other equivalent fuels can be used.
9. The calibration heat flux meter can share the back heat flux meter, which is a total heat flux density type, foil Gardon heat flux meter with a range of 0-22.7W/m2 and an accuracy of ± 3% of the indicated reading.
10. Calibrate 7 thermocouples, ceramic encapsulated, metal sheathed, grounded K-type nickel chromium nickel aluminum thermocouples with a diameter of 3.2mm, and the wire diameter should be 0.511mm.
11. Anemometer: A blade type anemometer is used to calibrate the flow rate of air entering the burner.
Use a flexible tube with a diameter of 102mm and a length of 6.1m to supply fresh air to the inlet of the burner to prevent damage to the anemometer caused by inhaling smoke and dust.
An adapter permanently installed at the inlet of the burner can be selected to effectively shield the anemometer and provide an installation port for the flexible pipe inlet.
12. Sample installation frame: Except for the central vertical plate which is made of 6.4mm thick steel to reduce deformation, all other parts should be made of 3.2mm thick steel.
The horizontal beam of the sample installation frame should be fixed to the vertical beam of the sample bracket with bolts, so that the expansion of the beam will not cause deformation of the entire structure. Two insulation and soundproofing blanket samples should be installed using an installation frame.
13. Two back heat flux meters: Install two total heat flux density and foil Gardon heat flux meters in the cold area on the back of the sample mounting frame and behind the insulation blanket sample.
The centerline of the heat flow meter and the conical cylinder of the burner should be on the same plane, and the distance from the vertical centerline of the test frame should be 102mm. The range of the heat flow meter is 0-22.7W/m2, and the accuracy is ± 3% of the indicated reading.
