Fire Safety Science Digital Archive

The sensitivity of town gas/air mixtures containing 18, 12 or 6.5 per cent gas to ignition by aluminium paint sparks has been compared using six paints examined in earlier work with 18 per cent gas. The results indicate that, under the conditions of test, a mixture containing 18 per cent gas was ignited more easily than mixtures containing 12 or 6.5 per cent. There is thus no reason to modify the conclusions drawn from the earlier work.