51
Rev.12/31/97
or can be of a portable pressurized type.
8.3 FLAME ARRESTERS PURPOSE AND CLEANING
8.3 FLAME ARRESTERS PURPOSE AND CLEANING
Article 480-9 of the National Electric Code requires each vented battery cell
to be equipped with a flame arrester designed to prevent destruction of the
cell attributable to an ignition of gases outside the cell.
to be equipped with a flame arrester designed to prevent destruction of the
cell attributable to an ignition of gases outside the cell.
The diffuser material of flame arresters can become partially clogged from
electrolyte spray if cells are overfilled with water or have been excessively
electrolyte spray if cells are overfilled with water or have been excessively
overcharged. Flame arresters should therefore be inspected
annually, and all
arresters having clogged pores should be replaced or cleaned as follows:
1. Immerse the flame arrester several times in fresh water in a plastic
bucket.
2. Eject the water after each immersion by vigorous shaking or an air blast.
3. Dump and refill the bucket with clean water for every 15 flame arresters
that are cleaned.
4. Do not use any cleaning or neutralizing agents in the water because any
dry residue may clog the pores of the diffuser materials.
8.4 VENTILATION
8.4 VENTILATION
A determination must be made for each battery area as to whether sufficient
ventilation is being provided to ensure adequate diffusion of hydrogen gas
during maximum gas generating conditions. Such determination can be
made from the following data:
ventilation is being provided to ensure adequate diffusion of hydrogen gas
during maximum gas generating conditions. Such determination can be
made from the following data: