With smaller
apparatus they may be discharged into cesspools if sufficiently diluted.
The ITALIAN GOVERNMENT regulations in regard to acetylene plant are
divided into eight sections. The first of these relates to the production
and use of liquid and compressed acetylene. The production and use of
liquid acetylene is prohibited except under the provisions of the laws
relating to explosives. Neat acetylene must not be compressed to more
than l-1/2 atmospheres except that an absolute pressure of 10 atmospheres
is allowed when the gas is dissolved in acetone or otherwise rendered
free from risk. Mixtures of acetylene with air or oxygen are forbidden,
irrespective of the pressure or proportions. Mixtures of acetylene with
hydrocarbons, carbonic oxide, hydrogen and inert gases are permitted
provided the proportion of acetylene does not exceed 50 per cent. nor the
absolute pressure 10 atmospheres.
The second section relates to acetylene installations, which are
classified in four groups, viz., (_a_) fixed or portable apparatus
supplying not more than thirty burners consuming 20 litres per hour;
(_b_) private installations supplying between 30 and 200 such
burners; (_c_) public or works installations supplying between 30
and 200 such burners; (_d_) installations supplying more than 200
such burners.
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