TESTING THE SMOKE GENERATION OF MATERIALS AND THE TOXICITY PRODUCTS OF THEIR DECOMPOSITION
AND COMBUSTION WITH METHODS ACCORDING TO:
ISO 5659-2, IMO 2010 FTP CODE PART 2 AND PN-EN 45545-2
Principle of the test.
Testing the smoke generation of materials are being conducted in the closed chamber. The preview of studied material in the horizontal position is being subjected to the thermal decomposition and combustion in the following conditions:
- thermal irradiance 25 kW/m2 in the presence of the flame of the pilot burner,
- thermal irradiance 25 kW/m2 without the flame of the pilot burner,
- thermal irradiance 50 kW/m2 in the presence of the flame of the pilot burner,
- thermal irradiance 50 kW/m2 without the flame of the pilot burner.
The smoke evolved is collected in the chamber, which also contains photometric equipment. The attenuation of a light beam passing through the smoke is measured. The results are reported in terms of specific optical density.
During the research on materials an appropriate optical density is determined as well as concentrations: CO2, CO, HCN, SO2, NO2, NO, HCl, HF, HBr are being measured with the FTIR analyser.
The FTIR analyser is in a neighbouring room. An influence of pollutants of air is limiting it in the zone of checking the spectrum to the result analysed.
Stand for testing smoke generation of materials and the product toxicity of their decomposition and combustion
The test sample shall comprise a minimum of 12 specimens if all four modes are to be tested: six specimens shall be tested at 25kW/m2 (three specimens with a pilot flame and three specimens without a pilot flame) and six specimens shall be tested at 50 kW/m2 (three specimens with a pilot flame and three specimens without a pilot flame).
Size of specimens.
The specimens shall be square, with sides measuring 75mm ± 1mm. Materials of 25mm nominal thickness or less shall be evaluated at their full thickness. Materials with a thickness greater than 25mm shall be cut to give a specimen thickness of 25mm ±0,1 mm, in such a way that the original (uncut) face can be evaluated.
Applying research methods:
- shipbuilding (requirements according to IMO 2010 FTP Code Part 2),
- railways (according to: R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R17, R20, R21, R22 and R23 requirements of the norm PN-EN 45545-2).