Smoke Density Test Chamber Description:

The Federal Aviation Administration's FAA-approved NBS Smoke Density Test Box meets all the latest FAA test standards and numerous aerospace test standards such as BSS 7238, BSS 7239, AITM 2.0007, AITM 3.0005, etc., while meeting domestic aviation testing. Standards, such as the HB6577 smoke density test standard.

Smoke Density Test Chamber Feature:

1. Large double-layer heat-resistant glass observation window for easy observation and observation;

2, PID temperature control mode, stable control of the furnace temperature;

3. The heater is a coil type radiant heater with integrated thermocouple;

4. The sample runs with a pneumatic propulsion device to complete the automatic operation;

5. The burner adopts electric spark ignition mode, which is convenient for users to operate;

6. Four ferrule interfaces are provided at the top of the box for smoke toxicity test;

7. Provide 0-50KW/m2 heat flow meter and internal self-circulation device;

8. The optical device is fixed on the optical platform to complete the accurate test;

9, can provide 3 sets of neutral filters for transmittance value calibration;

10. Provide 3 stainless steel sample holders and blank sample holder devices;

11. Provide gas pressure and flow regulating device for open flame burning test;

12. Equipped with data acquisition system and smoke density standard test software;

13. The test software can display test data such as transmittance and smoke density;

14. Optional smoke toxicity test kit, including gas collection pump and detection tube;

15. Connected smoke density test box for qualitative and quantitative analysis of smoke components;

16. The types of gases analyzed include, but are not limited to, CO, HCN, HF, HCI, SO2, NOX.

Smoke Density Test Chamber Standards:

AITM Airbus Standard: AITM 2.0007A, AITM 2.0007B, AITM 3.0005

BSS Boeing Standard: BSS 7238, BSS 7239

FAA Federal Aviation Administration: FAR PART 25 APPENDIX F Part V

FAR 25.853 flammability test to aircraft material

BSS 7239 Test method for toxic gas generation by materials on combustion

BSS 7238 Test method for smoke generation by materials on combustion

ABD 0031- Airbus fire testing-flame, smoke and toxicity

Smoke Density Test Chamber Parameters

Smoke Density Test Chamber Specifications:

Dimension: 1560 mm (W) x 2220 mm x (H) x 1060 mm

Weight: 200kg

Power requirements: 220V, 30A

Ambient temperature: 10 ° C to 35 ° C

Gas requirements: air compressor air source, propane gas

What is the BSS Test?

BSS stands for Boeing Safety Standard. Commonly abbreviated to BSS, the BSS 7239 is a test method for the generation of toxic gases by specific materials upon combustion. When materials burn or ignite, they release gases that can be hazardous to human health when they reach certain levels. BSS 7239 determines exactly which and how much toxic gases are emitted by burning a sample piece of material of three inches by three inches in a controlled setting.

The test checks for the following gases:

• Carbon monoxide (CO)
• Hydrogen cyanide (HCN)
• Sulfur dioxide (SO₂)
• Hydrogen chloride (HCL)
• Hydrogen fluoride (HF)
• Nitrogen oxides (NO_x) (Both NO, nitric oxide, and NO2, Nitrogen dioxide, are detected)

There are multiple methods of measuring toxicity levels. One of the most frequently used methods is spectrophotometry. This technique is based on the fact that different compounds absorb light differently. By shining light through the smoke that’s generated by the combustion of the test material, it becomes possible to distinguish exactly which compounds are present and in what concentration.

Common Tests Performed with this Test

This flammability test, the BSS 7239, can be performed in conjunction with ASTM E162, which exposes materials to a radiant heat source in order to test the flame spread factor and heat evolution factor. In addition, it can also be performed in conjunction with ASTM E662, which measures the smoke density of specific materials upon combustion. In this instance, the smoke generated in ASTM E662 can be tested for toxicity using spectrophotometry.

What does the Boeing Safety Standard 7239 test for?

As a highly effective toxic gas generation test, BSS 7239 is required to measure the flame smoke toxicity (FST) of composites, textiles, and coatings used in the railroad, aircraft and government sectors. The reason for this is that the materials used need to meet parts per million (PPM) standards and the results of this test show the actual concentration of toxic gases emitted during combustion of a material.