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Wherever corrosive materials are stored or processed, signs with letters not less than 3 inches high on contrasting background stating “WARNING – CORROSIVE MATERIALS” shall be posted at any location within a building and at any location within an area outside a building where such materials are processed or stored, and at such other locations as may be required by the Chief.
Tanks containing corrosive materials which react with water shall be of closed type, or shall be equipped with a lid which shall be kept closed during intervals of non-use and at the end of each working shift. A hood or shield shall be provided over open tanks containing corrosive materials which react with water, if located beneath automatic sprinklers.
Where steam is used to heat or agitate corrosive materials in tanks, vats or pans or where compressed air is used to agitate such liquids and such steam or air is supplied from a line in which the pressure is higher than that which may be safely used to heat or agitate the liquids, a spring- loaded relief valve or other effective means shall be provided in the line to prevent the delivery of excessive pressure of steam or air to the tanks.
Such tanks and vats in which corrosive materials are agitated by compressed air, steam or mechanical means, or are heated, shall have controls so located that any employee operating them will not be exposed to splashes or boil-overs. Where such location is impracticable, equivalent protection shall be provided by means of shelter, and safe means of escape from shelter shall be provided.
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