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Electrical wiring, motors and fixtures in any dip tank vapor area shall comply with Title 14E for hazardous locations and with the specific provisions of this section.
(a) There shall be no open flames, spark- producing devices or heated surfaces having a temperature sufficient to ignite the vapors in any dip tank vapor area.
(b) Electric wiring and equipment in any dip tank vapor area shall be explosion-proof type approved for use in such hazardous locations. Such area shall be considered as Class I, Division 1 hazardous locations as defined in Section 14E-5-500.
(c) Unless specifically approved for locations containing both deposits of ignitable residues and explosive vapors, there shall be no such electrical equipment in the vicinity of dip tanks or associated drainboards or drying operations which are subject to splashing or dipping of dip tank liquids, except wiring in rigid conduit or in threaded boxes or fittings containing no taps, splices or terminal connections and except hereinafter specifically permitted in Sections 15-24-680 to 15-24-700 relating to electrostatic apparatus.
(d) In any floor space outside of the dip tank vapor area, but within 20 feet therefrom and not separated by fire separation complying with Section 15-24-730, there shall be no open flames or spark- producing devices. Such areas shall be considered as Class I, Division 2 hazardous locations as defined in Section 14E-5-500.
(Prior code § 129.1-68; Amend Coun. J. 9-6-17, p. 55278, Art. II, § 57)
A dip tank shall be required when for any reason articles or materials are immersed in Class I, II or III flammable liquids or in a liquid containing any volatile flammable substance in solution or in suspension. All dip tank, flow coat and roll coating operations and maintenance shall comply with the following:
(a) Areas in the vicinity of the dip tanks shall be kept clear of combustible stock and shall be kept entirely free of combustible debris.
(b) Frequent inspections and tests of all dip tank facilities shall be made by a qualified employee, including covers, overflow pipe inlets and discharge pipe, bottom drains, all valves including quick opening valves, electrical wiring and equipment and grounding connections ventilating facilities and all extinguishing equipment. Any defects shall be promptly corrected.
(Prior code § 129.1-69)
Fire extinguishing equipment shall be provided as follows:
(a) Standard fire extinguishers shall be required.
(b) Dip tanks having less than 150 gallons capacity or less than ten square feet liquid surface area shall be fitted with a cover complying with the provisions of Section 15-24-800 or with one of the automatic extinguishing facilities specified below.
(c) Dip tanks of over 150 gallons capacity or having a liquid surface area in excess of ten square feet shall be protected with at least one of the following automatic extinguishing facilities:
1. An approved automatic water spray extinguishing system;
2. An approved automatic foam extinguishing system;
3. An approved automatic carbon dioxide extinguishing system;
4. An approved automatic dry chemical extinguishing system.
(Prior code § 129.1-70)
Dip tank covers shall comply with the following:
(a) Covers shall be arranged to close automatically in the event of a fire. Such tank covers shall also be arranged for manual operation.
(b) Covers shall be constructed of substantial noncombustible materials or if of the tin-clad type, the enclosing metal shall be with locked joints.
(c) Chains or wire rope shall be used for cover support or operating mechanism.
(d) Covers shall be kept closed when dip tanks are not in use.
(Prior code § 129.1-71)
(a) Such tanks shall not be located on or within 20 feet of combustible floors. Such tanks shall not be closer than 20 feet for a furnace or other open-flame heating device, torch or other heat-producing device.
(b) Such tanks shall be provided with noncombustible hood and vent, and vented directly to the outside of the building and shall otherwise comply with the requirements of Chapter 13-176 . Such vents and hood shall not be closer than 18 inches to any combustible materials.
(c) Each such tank shall be equipped with a high temperature limit switch so arranged to sound a suitable audible alarm when the temperature of the quenching medium reaches 50 degrees below the flashpoint.
(d) Such tanks having a capacity of over 500 gallons or having a liquid surface area of 25 square feet or more shall be protected as specified in Section 15-24-790(b) or (c) of this Code.
(e) Air under pressure shall not be used to fill or to agitate the quenching medium in the tanks.
(Prior code § 129.1-72)
Notes
| 13-176 | The hyper-linked material is not part of the Chicago Building Code infobase and therefore is not included herein. The material is included in other provisions of the Chicago Municipal Code. The complete Chicago Municipal Code is available for purchase from American Legal Publishing in both print and Folio® versions. Please click here for the appropriate American Legal order form in printable Adobe® PDF format. For additional information, you may visit American Legal's website by clicking here. |
Flow coat operations shall comply with the requirements for dip tanks. The area of the sump and any area within 20 feet of the flow coat operations shall be considered the vapor area. Flow coat operations shall also conform to the following specific requirements:
(a) Paint or other flammable liquid shall be supplied by direct low pressure pumping arranged to automatically shut down by means of approved heat- actuated devices in the event of a fire.
(Prior code § 129.1-73)
Roll coating operations shall comply with the following provisions and the other applicable requirements of the code:
(a) The processes of roll coating, spreading and impregnating in which fabrics, paper or other material is passed directly through a dip tank or trough containing flammable liquids or over the surface of a roller that revolves partially submerged in a flammable liquid shall conform to the requirements of Sections 15-24-760 to 15-24-800 of this Code.
(b) Adequate arrangements shall be made to prevent sparks from static electricity by electrically bonding and grounding all metallic rotating and other parts of the machinery and equipment and by the installation of static collectors. All such electrical bonding and grounding shall be done in strict accordance with the provisions of Title 14E.
(Prior code § 129.1-74; Amend Coun. J. 9-6-17, p. 55278, Art. II, § 58)
ARTICLE VIII. DRYING APPARATUS (15-24-840 et seq.)
Every room for the drying of articles or materials, which will give off explosives or flammable vapors during the drying process, shall have an enclosure of two-hour fire-resistive construction, if it has a floor area of 1,000 square feet or less and of three-hour fire- resistive construction of solid masonry or concrete if it has a floor area exceeding 1,000 square feet but not more than 2,000 square feet; and of four-hour fire-resistive construction if it has a floor area exceeding 2,000 square feet; provided, however, that an opening, or openings from any adjoining room for a conveyor may be provided in an enclosure for any such drying room if each such adjoining room is made to conform with the requirements of this section for such a drying room; and provided further, that if a system of collecting and disposing of the vapors produced in the drying room is provided, then the enclosure for the drying room shall be not less than one-hour fire- resistive construction in any case, and the provisions of this section for an adjoining room in which there is a conveyor extending into the drying room shall not apply.
(Prior code § 129.1-75)
Section 15-24-840 shall not apply when drying is conducted in a drying device specifically designed for drying articles, which have been coated with a material that gives off explosive vapor during drying. Adequate ventilation shall be provided, which will insure ventilation sufficient to prevent buildup of an explosive mixture. The ventilation system shall be interlocked such that in case of failure of the ventilating system, the drying device will not function. The heating operation shall comply with Chapter 13-180 . The drying operation shall comply with Section 15-24-860. Whenever located adjacent to the spraying operation, preventilation shall occur before the heating system can be started.
(Prior code § 129.1-76)
Notes
| 13-180 | The hyper-linked material is not part of the Chicago Building Code infobase and therefore is not included herein. The material is included in other provisions of the Chicago Municipal Code. The complete Chicago Municipal Code is available for purchase from American Legal Publishing in both print and Folio® versions. Please click here for the appropriate American Legal order form in printable Adobe® PDF format. For additional information, you may visit American Legal's website by clicking here. |
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