SECTION 5.4  CELLULOSE NITRATE PLASTICS

Subsection 5.4.1.  Displays

Advertising displays

5.4.1.1.  Displays of cellulose nitrate plastic articles in stores that are not in showcases or show windows shall be displayed only when placed on tables or counters not more than 1 m wide and 3 m long, and the spaces underneath the tables or counters shall be kept free of combustible materials.

Lighting fixtures

5.4.1.2.  Lighting fixtures shall not be located adjacent to any cellulose nitrate plastic material so as to create a possible ignition hazard.

Subsection 5.4.2.  Manufacture

Storage of raw materials

5.4.2.1.  Raw materials used in the manufacture of cellulose nitrate plastics shall be stored only in areas reserved for that purpose.

Storage in cabinets

5.4.2.2.  Not more than 450 kg of raw material used for the manufacture of finished cellulose nitrate plastic goods shall be stored in cabinets in any one workroom, not more than 225 kg stored in any one cabinet and not more than 112 kg in any one compartment of the cabinet.

Storage in vented vaults

5.4.2.3.  Raw material in excess of that permitted in Article 5.4.2.2. shall be kept in vented vaults not exceeding 40 m³ capacity and protected with an automatic sprinkler system installed in conformance with NFPA 13, “Standard for the Installation of Sprinkler Systems”.

Accumulation of materials in workrooms

5.4.2.4.  In factories manufacturing articles of cellulose nitrate plastics, sprinklered and vented cabinets, vaults or storage rooms shall be provided to prevent the accumulation of excessive quantities of such material in workrooms.

Stationing of operators

5.4.2.5.  In the workrooms of factories where cellulose nitrate plastics are being processed, operators shall be stationed not closer than 1 m apart.

Storage in work areas

5.4.2.6.  Material for the manufacture of cellulose nitrate plastic articles that is not kept in containers may be placed on tables, workbenches or at machines provided the quantity does not exceed one day’s supply.

Storage limitations in workrooms

5.4.2.7.  The total amount of cellulose nitrate plastic materials, including the material in containers and on tables, in any one workroom shall not exceed 70 kg.

Waste material storage

5.4.2.8.  Waste cellulose nitrate plastic materials such as shavings, chips, turnings, sawdust edgings and trimmings shall be kept under water in metal receptacles until removed from the premises.

Subsection 5.4.3.  Storage of Finished Products

Ventilation

5.4.3.1.  Areas where cellulose nitrate plastic finished products are stored shall be ventilated so that any decomposition gases produced by the plastics will be vented outdoors to an area where they will not re-enter the building.

Heating appliance restrictions

5.4.3.2.  (1)  Cellulose nitrate plastics shall not be stored

(a)   in rooms containing fuel-burning appliances or electrical heating elements, or
(b)   within 600 mm of any steam pipe, radiator or chimney.

Storage vaults

5.4.3.3.  (1)  Where cellulose nitrate plastics in excess of 11 kg are stored in any fire compartment in a building, a vented cabinet or vault constructed in conformance with NFPA 40E, “Code for the Storage of Pyroxylin Plastic”, and Articles 5.4.3.4. and 5.4.3.5. shall be provided for its storage.

(2)  Not more than 9000 kg of cellulose nitrate plastics shall be stored in any vault.

Storage up to 3400 kg

5.4.3.4.  (1)  Where quantities do not exceed 3400 kg, cellulose nitrate plastics shall be stored in a vault that

(a)   has a fire-resistance rating not less than 1.5 h,
(b)   is designed to resist an internal pressure of 3.5 kPa,
(c)   is not greater than 40 m³ in volume,
(d)   has explosion venting of 0.1 m² of venting area to the exterior for every cubic metre of vault volume, and
(e)   is ventilated to the exterior to provide 200 cm² of ventilating area for each cubic metre of vault volume.

Storage in excess of 3400 kg

5.4.3.5.  (1)  Where quantities exceed 3400 kg but do not exceed 9000 kg, cellulose nitrate plastics shall be stored in a vault that

(a)   has a fire-resistance rating not less than 4 h,
(b)   is designed to resist an internal pressure of 28 kPa,
(c)   has explosion venting of 650 cm² of venting area to the exterior for every cubic metre of vault volume, and
(d)   is ventilated to the exterior to provide 200 cm² of ventilating area for each cubic metre of vault volume.

Subsection 5.4.4.  Cellulose Nitrate Motion Picture Film

Restricted use

5.4.4.1.  Cellulose nitrate motion picture film shall not be used, stored or handled in a place of public assembly.

Storage and handling

5.4.4.2.  Cellulose nitrate motion picture film shall be stored and handled in conformance with NFPA 40, “Standard for the Storage and Handling of Cellulose Nitrate Motion Picture Film”.

Storage when not in use

5.4.4.3.  When not in use, cellulose nitrate motion picture film shall be kept in closed, single-roll containers.

Subsection 5.4.5.  Fire Protection

Sprinkler systems

5.4.5.1.  The manufacture and storage of articles of cellulose nitrate plastic in quantities exceeding 45 kg shall be only in buildings equipped with a system of automatic sprinklers installed in conformance with NFPA 13, “Standard for the Installation of Sprinkler Systems”.