The notice must
also contain approved general information as to the properties of calcium
carbide and acetylene, precautions that must be observed to guard against
possible danger, and a statement of how often the purifier will require
to be recharged.
3. The apparatus must be marked with the name of the maker, the year of
its construction, the available capacity of the gasholder, and the
maximum generating capacity per hour.
4. Each constituent of the plant must be proportioned to the maximum
hourly output of gas and in particular the available capacity of the
holder must be 75 per cent. of the latter. The apparatus must not be
driven above its nominal productive capacity.
5. The productive capacity of generators in which the gasholder has to be
opened or the bell removed before recharging, or for the removal of
sludge, must not exceed 50 litres per hour, nor may the charge of carbide
exceed 1 kilo.
6. Generators exceeding 50 litres per hour productive capacity must be
arranged so that they can be freed from air before use.
7. Generators exceeding 1500 litres per hour capacity must be arranged so
that the acetylene, contained in the parts of the apparatus which have to
be opened for recharging or for the removal of sludge, can be removed
before they are opened.
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