Burn Through Test Apparatus For Thermal Acoustic Insulation Material

1. Scope of application:

1.1 This standard specifies a test method for the burn-through resistance of thermal and acoustic insulation materials under high-intensity open flames.

1.2 This standard is suitable for evaluating the burn-through resistance of thermal and acoustic insulation materials under high-intensity open flames.

2. Compliant standards:

2.1 GB/T25352-2010

2.2 US Federal Aviation Regulations FAR25

2.3 Civil Aviation Administration of China transport aircraft standard CCAR-25-R4

3. Main parameters:

3.1 Laboratory: The length and width of the ground of the laboratory should not be less than 3.05m.

3.2 Burner:

3.2.1 The structure of the burner: it is an improved gun-type burner. The setting of the burner determines the flame characteristics, and parameters such as fuel pressure, nozzle depth, stator position and inlet air flow are properly adjusted to achieve the proper flame.

3.2.2 Nozzle: The nozzle should maintain fuel pressure to produce a nominal fuel flow of 0.378L/min.

3.2.3 Conical tube of burner: The extended cone of the burner is installed at the end of the ventilation pipe, and its length is (305±3) mm. The burner cone should have an opening with a width of (280±3) mm and a height of (152±3) mm.

3.3 Installation of heat flow meter: It is installed on a heat insulation board with a length (305±3) mm, a width (152±3) mm and a thickness (19±3) mm. The plate is fastened to the angle bracket and placed on the specimen holder when calibrating the burner.

3.4 Meter: It measures and records the output value of the heat flow meter and thermocouple with a recording potentiometer of suitable range or other suitable calibrated meter.

3.5 Timing device: It uses a stopwatch or other timing device to measure the action time and burn-through time of the burner flame, and its accuracy is ±1s/h.

3.6 Laboratory: Tests are conducted in a laboratory to reduce or eliminate the possibility of fluctuations in test data due to air movement. The length and width of the floor of the laboratory should not be less than 3.05m.