Calcium carbide shall be contained in metal packages of sufficient strength to prevent rupture. The packages shall be provided with a screw top or equivalent. These packages shall be constructed water- and air-tight. Solder shall not be used in such a manner that the package would fail if exposed to fire.
Metal tools, even the so-called spark resistant type may cause ignition of an acetylene and air mixture when opening carbide containers.
Sprinkler systems shall not be installed in carbide storage rooms.
Packages containing calcium carbide shall be conspicuously marked "Calcium Carbide - Dangerous If Not Kept Dry" or with equivalent warning.