THE PROTECTION OF EQUIPMENT WITH FLAME ARRESTERS. (2) EFFECT OF CONTENTS, AND USE OF IMPROVED ARRESTERS
Palmer, K.N. and Rogowski, Z.W., 1967. THE PROTECTION OF EQUIPMENT WITH FLAME ARRESTERS. (2) EFFECT OF CONTENTS, AND USE OF IMPROVED ARRESTERS. Fire Research Notes658
The use or flame arresters to prevent the emission of propane-air explosions
from cubical vessels has been further investigated. External protection of the
arresters with bursting diaphragms or magnetic panels has been shown to be
practicable, and the effect of the covers on the explosion pressures was measured.
The presence of two-dimensional contents within the vessels, such as a shelf or
partition, increased the pressure particularly when more than 25 per cent of the
cross-section of the vessel was blocked. Three-dimensional obstacles, such as
bulky components, increased the pressure to a lesser extent. Means of minimising
the increases were described. Flame arresters made from thermally resistant
metals showed marked improvement over those reported previously, and permitted
reduction in the required vent area; the area would then usually be governed
by the maximum pressure permissible rather than by the need to prevent thermal
damage to the arresters. Increased explosion pressures were also caused by
multiple ignition sources, but the increases were relatively small in the
presence or obstacles.