First of all the plant must be freed from gas. This is
to be done by filling every part with water till the liquid overflows,
leaving the water in it for at least five minutes before emptying it
again.
6. The apparatus house must not be used for any other operation, nor
employed for the storage of combustible articles. It must be efficiently
ventilated, and always kept closed. A notice must be put upon the door
that unauthorised persons are not permitted to enter.
7. It in forbidden to enter the house with a burning lantern or lamp, to
strike matches, or to smoke therein.
8. A search for leaks in the pipes must not be made with the aid of a
light.
9. Alterations to the service must not be made while the pipes are under
pressure, but only after the main cock has been shut.
10. If portable apparatus, such as described in I., 12, are connected to
the burners with rubber tube, the tube must be fortified with an internal
or external spiral of wire. The tube must be fastened at both ends to the
cocks with thread, copper wire, or with ring clamps.
11. The preparation, storage, and use of compressed or liquefied
acetylene is forbidden. By compressed acetylene, however, is only to be
understood gas compressed to a pressure exceeding one effective
atmosphere.
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