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All doors to buildings, rooms, cabinets or compartments within which calcium carbide is kept or stored shall be plainly marked “CALCIUM CARBIDE – KEEP DRY;” “CALCIUM CARBIDE – USE NO WATER IN CASE OF FIRE;” or other equivalent approved wording by means of approved durable signs or the approved equivalent thereof.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
(a) After June 27, 1949, any building or other structure used for acetylene manufacturing for sale, or for compression and dissolving of acetylene, or for storage of charged cylinders in connection therewith, and not previously used for such purpose prior to June 27, 1949, shall be distant not less than one hundred fifty (150) feet from every other building not in the same ownership and not in use for a similar or accessory purpose, and not less than one hundred fifty (150) feet from any line on adjoining property on which a building or other structure may be built.
(b) Every building or part of a building used for acetylene manufacturing for sale or for the charging of cylinders for the storing of charged cylinders in connection therewith, shall be separated from any part of such building used for any other purpose by an occupancy separation having a fire resistance rating of not less than four (4) hours.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
(a) The storage of calcium carbide and the generation and use of acetylene shall conform to the provisions of this Fire Prevention Code and other applicable ordinances and accepted safe practice. When deemed necessary the Board of Building Standards and Building Appeals may promulgate rules or regulations supplementary to this Code to further define accepted safe practice. In the absence of such supplementary rules or regulations conformity with the applicable provisions of NFPA Standard No. 51 entitled “Welding and Cutting, Oxygen-Fuel Gas” shall be accepted as conformity with accepted safe practice.
(b) When deemed necessary for safety to life or property, the Fire Chief may require compliance with any requirement or recommendation of NFPA Standard No. 51.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
COMBUSTIBLE AND EXPLOSIVE DUSTS
(b) Wherever combustible or explosive dusts may accumulate, measures for the prevention of dust fires or explosions and safety measures for minimizing the effects of explosions shall be taken in conformity with the provisions of Sections 385.30 to 385.34 and with generally recognized standards for safety to persons and property. When deemed necessary, the Board of Building Standards and Building Appeals may promulgate supplementary rules and regulations. In the absence of such rules and regulations, conformity with the standards listed in Section 3101.07 of the Building Code shall be accepted as conformity with generally recognized standards for safety to persons and property.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
(a) After June 27, 1949, all buildings or parts of buildings in which materials producing flammable dust or explosive dust are stored or handled which were not used for such purpose on June 27, 1949, shall be of Type I, fireproof construction or Type II, incombustible construction and shall be either independent buildings or separated from other occupancies by occupancy separations designed to withstand probable explosion pressures and having a fire resistance rating of not less than four (4) hours.
(b) All buildings where magnesium, aluminum or other specially hazardous powder is manufactured, processed or handled in unsealed containers, shall be isolated buildings located not less than three hundred (300) feet from other buildings not part of the same plant, and not less than three hundred (300) feet from lines on adjacent premises where buildings may be built.
(c) Buildings liable to explosion pressure from explosive dust and constructed of light incombustible construction shall, except as provided in subsection (b) hereof, be located not less than seventy-five (75) feet from all adjoining buildings and from all lines on other premises on which buildings may be built.
(d) The construction and interior finish of rooms or places where dust may accumulate shall be such as to eliminate, so far as possible, surfaces, ledges or other places where dust may settle or accumulate.
(e) So far as possible all equipment shall be and shall be maintained dust-tight. Equipment in which explosive dust may accumulate shall be provided with approved explosion vents. Equipment which may accumulate charges of static electricity shall be suitably grounded.
(f) Equipment, bins and vaults in which dusty material is produced, processed or handled shall, so far as practicable, be equipped with devices or systems for removing the dust in a safe manner to a safe location or with systems of inert gas for fire and explosion prevention installed in conformity with the applicable code listed in Section 385.30.
(g) No open flames and no motors or other electrical devices which may emit sparks shall be permitted within rooms or spaces where combustible or explosive dust may accumulate. All motors and switches which are not of approved dust-proof types shall be located outside of the room, space or equipment in which dust may accumulate. No construction or repair work involving the use of welding equipment or of open flames or of sparking devices, shall be performed within any room or space which is not dust-free or in which dust-producing equipment is in operation.
(h) Whenever there is the possibility of ferrous metal being present in material processed, approved separators for the removal of such metal shall be provided and operated.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
(a) Dust collectors, other than water-spray type collectors, shall be located in separate fire-resistive and explosion-resistive vented rooms or shall be placed outside of buildings.
(b) Sections 3155.75 to 3155.77 shall govern blower and exhaust systems installed for the purpose of removing or conveying dust, stock and refuse by means of air either under positive pressure or exhaust suction.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
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