NF X70­100 Toxicity Test Apparatus


This method is based on the exposure of 1 g of test specimen. The test apparatus and conditions for this method are described in NF X70­100­2 with additional gas analysis information provided in EN 45545­2. The exposure conditions of the test specimen in the tube furnace are generally set at 600°C and fixed ventilation condition which


represents a developing fire condition for railway products.


When the CIT for a product on a railway vehicle is required, only one method is used for the testing, gas analysis and calculation of CIT. The method to be used is shown in Table 9.


Table 9: Test method to be used for determination of Conventional Index of Toxicity (CIT) Product


Products with large areas or significant surface areas; e.g. interior walls, floor coverings,


seat backs and coverings Non­listed products; e.g. minor mechanical components


EN ISO 5659­2 Smoke Chamber with FTIR


Yes No


NF X70­100­2 No Yes


Figure 11: FTT NF X70­100­2 / EN 50267­2­3 Toxicity Test


16


EN 45545-2:2013 – NEW F I R E C LASSIFICATIONS AND FIRE TES T METHODS FOR THE EUROPEAN RAILWAY INDUSTRY


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