Donald E. Major, Report of the Committee on James Murphy, Finishing Processes Kenneth J. Pilat, Steven J. Gunsel, John Schweitzer,

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1 Report of the Committee on Finishing Processes Steven J. Gunsel, Chair Environmental Consultant, OH [SE] Thomas G. Euson, Secretatry 3S Incorporated, OH [IM] William C. Anderson, Approved Fire Protection Company, Inc., MI [IM] Rep. National Association of Fire Equipment Distributors Inc. John E. Cieslik, CSP, Ford Motor Company, MI [U] Paul H. Dobson, FM Global, MA [I] Richard Scott Farnan, Team Blowtherm, GA [M] Bob Feldkamp, Nordson Corporation, OH [M] Rob J. Friberg, Wausau Insurance Companies, WI [I] Rep. Alliance of American Insurers Paul B. Gentry, Zurich Services Corporation, TN [I] John Gokey, Tyco Suppression Systems, WI [M] Rep. Fire Equipment Manufacturers Association Erling L. Horn, Fischer Industrial Finishing, CA [IM] Dennis P. Jenkins, Royal & Sun Alliance, NC [I] Rep. American Insurance Services Group Steven D. Jensen, 3M Company, MN [U] John S. Jurasic, Garmat USA, Inc., CO [M] John Katunar, III, Industrial Risk Insurers, MI [I] John C. Larson, DuPont Performance Coatings, PA [M] Dennis P. Mason, Marsh Risk Consulting, MI [I] John McKnight, National Marine Manufacturers Association, DC [U] Rep. Society of the Plastics Industry Inc. Kerry L. McManama, Underwriters Laboratories Inc., IL [RT] Lowell Miles, Miles Fiberglass & Plastics, OR [U] Rep. Composite Fabricators Association Gregory M. Murin, Travelers Insurance, CT [I] G. Randall Nance, Automated Fire Systems, Inc., NC [IM] Allen Pirro, Intertek Testing Services NA, Inc., NY [RT] Douglas A. Rivord, Graco Incorporated, MN [M] Gerald J. Rosicky, General Motors Corporation, MI [U] Rep. NFPA Industrial Fire Protection Section Don R. Scarbrough, Elyria, OH [SE] James Shea, Kidde-Fenwal, Inc., MA [M] Rep. Fire Suppression Systems Association Barry Thomas, BT Consulting, GA [SE] Larry L. Utterback, ITW Ransburg, IN [M] W. H. White, White Consulting Services, OH [SE] Alternates Bradley A. Byron, Graco Incorporated, MN [M] (Alt. to D. A. Rivord) Christopher J. Gates, Zurich Services Corporation, IL [I] (Alt. to P. B. Gentry) George K. Hayes, Nordson Corporation, GA [M] (Alt. to B. Feldkamp) John R. Johnson, Royal & SunAlliance, NC [I] (Alt. to D. P. Jenkins) Donald E. Major, FM Global, MA [I] (Alt. To P. H. Dobson) James Murphy, Badger Fire Protection, IL [M] (Alt. to J. Gokey) Kenneth J. Pilat, LMG Property, FL [I] (Alt. to R. J. Friberg) John Schweitzer, Composite Fabricators Association, MI [U] (Alt. to L. Miles) Michael A. Slowinske, Underwriters Laboratories Inc., IL [RT] (Alt. to K. L. McManama) Timothy J. Sullivan, Marsh USA Inc., MI [I] (Alt. to D. P. Mason) Nonvoting Robert B. Bell, US Department of Labor, DC [E] Patrick H. Franzen, Patrick H. Franzen & Associates, OR (Member Emeritus) Terence P. Smith, US Department of Labor, DC [E] (Alt. To R. B. Bell) Staff Liaison: Robert P. Benedetti Committee Scope: This Committee shall have primary responsibility for documents on safeguarding against the fire and explosion hazards associated with spray application processes, dipping processes, coating processes, and other similar processes, including glass fiber/resin fabrication processes, except for certain dipping processes that are within the scope of the Committee on Ovens and Furnaces. This list represents the membership at the time the Committee was balloted on the text of this report. Since that time, changes in the membership may have occurred. A key to classifications is found at the front of the document. The Technical Committee on Finishing Processes is presenting two Reports for adoption, as follows: Report I: The Technical Committee proposes for adoption, amendments to NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, 2000 edition. NFPA is published in Volume 2 of the 2001 National Fire Codes and in separate pamphlet form. NFPA 33 has been submitted to letter ballot of the Technical Committee on Finishing Processes, which consists of 30 voting members. The results of the balloting, after circulation of any negative votes, can be found in the report. Report II: The Technical Committee proposes for adoption, amendments to NFPA 34 Standard for Dipping and Coating Processes Using Flammable or Combustible Liquids, 2000 edition. NFPA is published in Volume 2 of the 2001 National Fire Codes and in separate pamphlet form. NFPA 34 has been submitted to letter ballot of the Technical Committee on Finishing Processes, which consists of 30 voting members. The results of the balloting, after circulation of any negative votes, can be found in the report.

2 NFPA 34 (Log #CP1) 34-1-(Entire Document) : Accept RECOMMENDATION: Restructure entire document to comply with the NFPA Manual of Style as follows: 1. Chapter 1 to contain administrative text only. 2. Chapter 2 to contain only referenced publications cited in the mandatory portions of the document. 3. Chapter 3 to contain only definitions. 4. All mandatory sections of the document must be evaluated for usability, adoptability, and enforceability language. Generate necessary committee proposals. 5. All units of measure in document are converted to SI units with inch/ pound units in parentheses. 6. Appendices restructured and renamed as Annexes. SUBSTANTIATION: Editorial restructuring, to conform with the 2000 edition of the NFPA Manual (Log #CP25) 34-2-(Entire Document) : Accept RECOMMENDATION: Replace the phrase not less than with at least wherever it appears in the text. SUBSTANTIATION: Editorial clarity. (Log #CP26) 34-3-(1.6, Definitions) : Accept RECOMMENDATION: Add the following definitions to the appropriate locations in Section 1.6: Class I Locations. Class I locations are those in which flammable gases or vapors are or may be present in the air in quantities sufficient to produce explosive or ignitable mixtures. Class I, Division 1. A Class I, Division 1 location is a location in which: (a) ignitable concentrations of flammable gases or vapors can exist under normal operating conditions, or (b) in which ignitable concentrations of such gases or vapors may exist frequently because of repair or maintenance operations or because of leakage, or (c) in which breakdown or faulty operation of equipment or processes might release ignitable concentrations of flammable gases or vapors, and might also cause simultaneous failure of electrical equipment in such a way as to directly cause the electrical equipment to become a source of ignition. Class I, Division 2. A Class I, Division 2 location is a location in which: (a) volatile flammable liquids or flammable gases are handled, processed, or used, but in which the liquids, vapors, or gases will normally be confined within closed containers or closed systems from which they can escape only in case of accidental rupture or breakdown of such containers or systems, or in case of abnormal operation or equipment, or (b) in which ignitable concentrations of gases or vapors are normally prevented by positive mechanical ventilation, and which might become hazardous through failure or abnormal operation of the ventilating equipment, or (c) that is adjacent to a Class I, Division 1 location, and to which ignitable concentrations of gases or vapors might occasionally be communicated unless such communications prevented by adequate positive-pressure ventilation from a source of clean air, and effective safeguards against ventilation failure are provided. Class I, Zone 0. A Class I, Zone 0 location is a location (a) in which ignitable concentrations of flammable gases or vapors are present continuously, or (b) in which ignitable concentrations of flammable gases or vapors are present for long periods of time. Class I, Zone 1. A Class I, Zone 1 location is a location (a) in which ignitable concentrations of flammable gases or vapors are likely to exist under normal operating conditions; or (b) in which ignitable concentrations of flammable gases or vapors may exist frequently because of repair or maintenance operations or because of leakage; or (c) in which equipment is operated or processes are carried on, of such a nature that equipment breakdown or faulty operations could result in the release of ignitable concentrations of flammable gases or vapors and also 152 cause simultaneous failure of electrical equipment in a mode to cause the electrical equipment to become a source of ignition; or (d) that is adjacent to a Class I, Zone 0 location from which ignitable concentrations of vapors could be communicated, unless communication is prevented by adequate positive pressure ventilation from a source of clean air and effective safeguards against ventilation failure are provided. Class I, Zone 2. A Class I, Zone 2 location is a location (a) in which ignitable concentrations of flammable gases or vapors are not likely to occur in normal operation and if they do occur will exist only for a short period; or (b) in which volatile flammable liquids, flammable gases or flammable vapors are handled, processed, or used, but in which the liquids, gases, or vapors normally are confined within closed containers of closed systems from which they can escape, only as a result of accidental rupture or breakdown of the containers or system, or as a result of the abnormal operation of the equipment with which the liquids or gases are handled, processed, or used; or (c) in which ignitable concentrations of flammable gases or vapors normally are prevented by positive mechanical ventilation, but which may become hazardous as a result of failure or abnormal operation of the ventilation equipment; or (d) that is adjacent to a Class I, Zone 1 location, from which ignitable concentrations of flammable gases or vapors could be communicated, unless such communication is prevented by adequate positive-pressure ventilation from a source of clean air, and effective safeguards against ventilation failure are provided. Class II Locations. Class II locations are those that are hazardous because of the presence of combustible dust. Class II, Division 1. A Class II, Division 1 location is a location (a) in which combustible dust is in the air under normal operating conditions in quantities sufficient to produce explosive or ignitable mixtures, or (b) where mechanical failure or abnormal operation of machinery or equipment might cause such explosive or ignitable mixtures to be produced, and might also provide a source of ignition through simultaneous failure of electric equipment, operation of protection devices, or from other causes, or (c) in which combustible dusts of an electrically conductive nature may be present in hazardous quantities. Class II, Division 2. A Class II, Division 2 location is a location (a) where combustible dust is not normally in the air in quantities sufficient to produce explosive or ignitable mixtures, and dust accumulations are normally insufficient to interfere with the normal operation of electrical equipment or other apparatus, but combustible dust may be in suspension in the air as a result of infrequent malfunctioning of handling or processing equipment and (b) where combustible dust accumulations on, in, or in the vicinity of the electrical equipment may be sufficient to interfere with the safe dissipation of heat from electrical equipment or may be ignitable by abnormal operation or failure of electrical equipment. SUBSTANTIATION: These definitions are necessary for the incorporation of the Zone concept into Chapter 4. (Log #CP2) 34-4-(1.6 (new)) : Accept RECOMMENDATION: Add new 1.6 to read: 1.6 Units and Formulas. The units of measurement used in this standard shall be the International System of Units, otherwise known as SI and Modernized Metric System. English customary units are given in parentheses following SI units, but shall be considered to be approximate conversions. (Log #CP27) 34-5-(1.6.17) : Accept RECOMMENDATION: Revise the definition of Vapor Area to read: * Vapor Area. Any area in the vicinity of: (1) a dipping or coating process and its drainboards, or (2) associated drying or conveying equipment, or (3) the interior of any exhaust plenum and any exhaust duct leading from the process, or (4) other associated equipment that might contain a flammable vapor concentration exceeding 25 percent of the lower flammable limit (LFL) during operation or shut-down periods. (See Chapter 5.)

3 SUBSTANTIATION: The intent of this definition is to apply also to the exhaust ventilation system. NFPA 34 May A2003 ROP Copyright, NFPA (Log #CP3) 34-6-(2.1 (new)) : Accept RECOMMENDATION: Add new 2.1 to read: 2.1 Scope. This chapter shall apply to the location of dipping and coating processes in buildings and with respect to other operations or processes. This chapter shall designate acceptable and unacceptable locations for dipping and coating processes. SUBSTANTIATION: Comply with the 2000 edition of NFPA Manual of Style. (Log #CP4) 34-7-(2.4) : Accept RECOMMENDATION: Revise 2.4 to read: 2.4* Locations in Other Occupancies. Dipping and coating processes shall not be located in any building that is classified as an assembly, educational, day care, health care, ambulatory health care, detention/correctional, institutional, or residential occupancy, unless they are located in a room that is separated both vertically and horizontally from all surrounding areas by construction having a fire resistance rating of not less than 2 hours and is protected by an approved automatic sprinkler system that is designed and installed in accordance with NFPA 13, Standard for the Installation of Sprinkler Systems. SUBSTANTIATION: Include other occupancy classifications to correlate with NFPA 1 and NFPA COMMENT ON AFFIRMATIVE: SHEA: Text does not flow - the manufacturer s recommended operating levels. (Log #CP5) 34-8-(3.1 (new)) : Accept RECOMMENDATION: Add a new 3.1 to read: 3.1 Scope. This chapter shall apply to the design and construction of dipping and coating process equipment and systems. of Stryle (Log #CP6) 34-9-(3.5.2) : Accept RECOMMENDATION: Revise to read: Depending upon the area of the liquid surface and the length and pitch of pipe, overflow pipes for dipping or coating tanks that exceed 570 L (150 gal) capacity or 1 m 2 (10 ft 2 ) of exposed of liquid surface shall be capable of handling either the maximum rate of delivery of process liquid or the maximum rate of automatic sprinkler discharge, whichever is greater, r but shall be not less than 3 in. (75 mm) in diameter. The overflow pipe shall be at least 75 mm (3 in.) in diameter. SUBSTANTIATION: Clarification of minimum overflow pipe size. (Log #CP7) (3.9.3) : Accept RECOMMENDATION: Revise to read: Heating systems shall be automatically shut down if the level of liquid in the dipping or coating tank exceeds or falls below a safe the manufacturer s recommended operating level. SUBSTANTIATION: Replace ambiguous text. (Log #CP28) (Chapter 4) : Accept RECOMMENDATION: Revise Sections 4.1, 4.2, 4.3, and 4.4 of Chapter 4 to read as follows: (all other sections remain the same) 4.1 General (NO CHANGE) (NO CHANGE) Electrical wiring and utilization equipment shall be suitable for the location in which they are installed and shall be installed in accordance with the applicable requirements of this chapter and with the applicable requirements of Articles 500, 501, 502, 505, and 516 of NFPA 70, National Electrical Code * For the purposes of this standard, the Zone classification system is applied as follows: Class I, Zone 0 locations are inside open or closed flammable liquid containers. For all other conditions, a Class I, Division 1 area may alternatively be classified as a Class I, Zone 1 area. A Class I, Division 2 area may be alternatively classified as a Class I, Zone 2 area x In instances of areas within the same facility classified separately, Class I, Zone 2 locations shall be permitted to abut, but not overlap, Class I, Division 2 locations. Class I, Zone 0 or Zone 1 locations shall not abut Class I, Division 1 or Division 2 locations. [NFPA 70, 505.6(b).] 4.1.2* Open flames, spark-producing equipment or processes, and equipment whose exposed surfaces exceed the autoignition temperature of the dipping or coating liquid shall not be located in the dipping or coating process area or in surrounding areas classified as Division 2 or Zone * Any utilization equipment or apparatus that is capable of producing sparks or particles of hot metal and is located above or adjacent to either the dipping or coating process area or the surrounding Division 2 or Zone 2 areas shall be of the totally enclosed type or shall be constructed to prevent the escape of sparks or particles of hot metal * Electrical wiring and utilization equipment that is located in the process area and is not subject to deposits of combustible residues shall be suitable for Class I, Division 1, Class I, Zone 1, or Class II, Division 1 locations, whichever is applicable * Electrical wiring and utilization equipment that is located in the process area and is subject to deposits of combustible residues shall be listed for such exposure and shall be suitable for Class I, Division 1, Class I, Zone 1, or Class II, Division 1 locations, whichever is applicable. Exception: Electrostatic detearing apparatus shall meet the requirements of Chapter * Areas Adjacent to Open Processes. Electrical wiring and utilization equipment located adjacent to open processes shall meet the requirements of through and Figures 4.2(a) or 4.2(b), whichever is applicable. 153

4 Figure 4.2(a) Electrical area classification for open processes without vapor containment or ventilation. Figure 4.2(b) Electrical area classification for open processes with peripheral vapor containment and ventilation. 154

5 4.2.1 Electrical wiring and utilization equipment located in any sump, pit, or below-grade channel that is within 25 ft (7625 mm) horizontally of a vapor source shall be suitable for Class I, Division 1, or Class I, Zone 1 locations. If the sump, pit, or channel extends beyond 25 ft (7625 mm) of the vapor source, it shall be provided with a vapor stop or it shall be classified as Class I, Division 1 or Class I, Zone 1 for its entire length Electrical wiring and utilization equipment located within 5 ft (1525 mm) of a vapor source shall be suitable for Class I, Division 1 or Class I, Zone 1 locations. The area inside the dip tank shall be classified as Class I, Division 1, or Class I, Zone 0, whichever is applicable Electrical wiring and utilization equipment located within 3 ft (915 mm) of the Class I, Division 1 or Class I, Zone 1 location described in shall be suitable for Class I, Division 2 or Class I, Zone 2 locations, as appropriate The space 3 ft (915 mm) above the floor and extending 20 ft (6100 mm) horizontally in all directions from the Class I, Division 2 or Class I, Zone 2 location described in shall be classified as Class I, Division 2 or Class I, Zone 2, and electrical wiring and utilization equipment located within this space shall be suitable for Class I, Division 2 or Class I, Zone 2 locations. Exception: This space shall be permitted to be nonclassified for purposes of electrical installations if the surface area of the vapor source does not exceed 5 ft 2 (0.46 m 2 ), the contents of the tank do not exceed 5 gal (19 L), and the vapor concentration during operating and shut-down periods does not exceed 25 percent of the lower flammable limit. 4.3 Areas Adjacent to Enclosed Processes. Areas adjacent to enclosed processes shall be classified in accordance with 4.3.1, 4.3.2, and Figure 4.3. Figure 4.3 Electrical area classification around enclosed processes The interior of any enclosed dipping or coating process or apparatus shall be a Class I, Division 1 or Class I, Zone 1 location, and electrical wiring and utilization equipment located within this space shall be suitable for Class I, Division 1 or Class I, Zone 1 locations. The area inside the dip tank shall be classified as Class I, Division 1, or Class I, Zone 0, whichever is applicable The space adjacent to an enclosed dipping or coating process or apparatus shall be classified as nonhazardous for purposes of electrical installations. Exception: The space within 3 ft (915 mm) in all directions from any opening in the enclosure and extending to the floor or grade level shall be classified as Class I, Division 2 or Class I, Zone 2, and electrical wiring and utilization equipment located within this space shall be suitable for Class I, Division 2 or Class I, Zone 2 locations. 4.4 Equipment and Containers in Ventilated Areas. Where dipping or coating equipment and supply containers are located in an area that is provided with ventilation as defined in this standard and is adjacent to a process area, but outside of a storage room or mixing room, the area within 3 ft (915 mm) in all directions from any open container or equipment and extending to the floor or grade level shall be classified as Class I, Division 1 or Class I, Zone 1 as shown in Figure 4.4. The area extending 2 ft (610 mm) beyond the Division 1 or Zone 1 location shall be classified as Class I, Division 2 or Class I, Zone 2 as appropriate. In addition, the area within 10 ft (3050 mm) horizontally of the perimeter of such open container or equipment, up to a height of 18 in. (460 mm) above the floor or grade level, shall be classified as Class I, Division 2 or Class I, Zone 2 as shown in Figure 4.4. The area inside the tank or supply container shall be classified as Class I, Division 1, or Class I, Zone 0, whichever is applicable. Electrical wiring and utilization equipment installed in these areas shall be suitable for the location. 155

6 Figure 4.4 Electrical area classification around an open container in a ventilated area. 4.5 Light Fixtures Light fixtures that are attached to the walls or ceilings of a process enclosure, but are outside of any classified area and are separated from the process area by glass panels that meet the requirements of shall be suitable for use in unclassified locations. Such fixtures shall be serviced from outside the enclosure Light fixtures that are attached to the walls or ceilings of a process enclosure, are located within the Class I, Division 2 or Zone 2 location, and are separated from the process area by glass panels that meet the requirements of shall be suitable for use in that location. Such fixtures shall be serviced from outside the enclosure. SUBSTANTIATION: In 1996, the Zone system of area classification was added to the National Electrical Code, NFPA 70, as an alternative area classification system to the Division system. In the Division system, areas are classified as either Division 1 or Division 2, depending on whether explosive gases are always present or likely to be present (Division 1) or whether these gases are not normally present (Division 2). The Zone system breaks these areas into Zone 0, Zone 1, or Zone 2, depending on whether explosive gases will always be present (Zone 0), are likely to be present (Zone 1), or are normally not present (Zone 2). For exact definitions, see Section of the NEC. Based on the definitions in the NEC, and consistent with industry practice in facilities that are classified according to the Zone system, the following proposed changes are necessary to include Zones in NFPA 33 and 34. Areas that are considered Division 1 under the Division system would be divided into Zone 0 and Zone 1 locations. In paint spray, dipping, and coating applications, a location directly above an open container, inside a closed container, or in a dip tank would be considered a Zone 0 area. The Zone 1 location would extend from the boundary of these Zone 0 areas to the Zone 2 areas. Locations classified as Division 2 would have boundaries identical to an area considered Zone 2. As specified in Section 505-6(b) of the NEC, Division classified areas cannot abut or overlap Zone classified areas, with the exception of a Zone 2 area, which may abut a Division 2 area. For this reason, the proposals specify that a spray booth or coating process may be classified to either the Division system or the Zone system, but not to a combination of both systems. While there are requirements in international standards for dust Zones, the NEC only permits explosive gas atmospheres to be classified as Zone areas. Therefore, powder coating applications are not permitted by these standards to be classified as Zone locations. COMMENT ON AFFIRMATIVE: KATUNAR: Section In my opinion, the Class II, Division 1 wording is incorrect for this paragraph and should be deleted, since the...equipment is not subject to deposits... Section Is Class II, Division 1 an appropriate classification for this section? (This could be appropriate, but I am not sure.) McMANAMA: Figure 4.4 This figure was redrawn as a generic box, instead of a 55-gallon drum, to prevent the reader from thinking 4.4 only applies to drums. (Log #CP8) (4.1 (new)) : Accept RECOMMENDATION: Add a new 4.1 to read: 4.1 Scope. This chapter shall apply to electrical utilization equipment that is used in or on or is attached to the dipping and coating equipment or is in the vicinity of the dipping and coating equipment. This chapter shall also apply to other sources of ignition. 156

7 (Log #CP9) (5.1 (new)) : Accept RECOMMENDATION: Add a new 5.1 to read: 5.1 Scope. This chapter shall apply to ventilation systems provided for the purpose of capturing and removing ignitable vapors from dipping and coating processes. necessary allowances being made for ordinary expansion and loading, and to prevent contact between moving parts and the duct or fan housing. Fan blades shall be mounted on a shaft that is sufficiently heavy to maintain proper alignment even when the blades of the fan are heavily loaded. All bearings shall be of the self-lubricating type or shall be lubricated from a point outside the duct and preferably shall be located outside the duct or fan housing. (Log #CP10) (5.2.1) : Accept RECOMMENDATION: Revise to read: Where the process does not allow adequate removal of vapors by mechanical ventilation alone, an properly designed enclosure shall be provided and the ventilation shall be capable of confining all vapors to the enclosure. (Log #CP14) (6.1 (new)) : Accept RECOMMENDATION: Add a new 6.1 to read: 6.1 Scope. This chapter shall apply to the storage, handling, and distribution of flammable and combustible liquids that are used in dipping and coating processes. (Log #CP11) (5.5.1) : Accept RECOMMENDATION: Replace and its exception with the following: Air exhausted from a dipping or coating process shall be permitted to be recirculated as make-up air for an unmanned dipping or coating process or cascaded to subsequent unmanned dipping or coating processes provided all of the following requirements have been met: (a) Solid particulates shall have been removed from the recirculated air. (b) The concentration of vapors in the exhaust airstream shall not exceed 25 percent of the lower flammable limit. (c) Listed equipment shall be used to monitor the concentration of vapors in all exhaust airstreams. (d) An alarm shall be sounded and the dipping or coating process shall be automatically shut down, if the concentration of any vapor in the exhaust airstream exceeds 25 percent of the lower flammable limit. (e) Equipment installed to process and remove contaminants from the air exhausted from dipping or coating processes shall be approved by the authority having jurisdiction. SUBSTANTIATION: This change replaces a blanket prohibition on recirculation of exhaust and its lengthy exception with a positive statement that clearly states under what conditions recirculation is allowed. (Log #CP12) (5.5.2) : Accept RECOMMENDATION: Revise to read: These provisions shall not prohibit disallow the use of recirculated air to occupied spaces. However, other requirements addressing the toxicity and the permissible exposure limits shall also apply. SUBSTANTIATION: Eliminate a double negative. (Log #CP13) (5.9.1) : Accept RECOMMENDATION: Revise to read: The rotating element of the exhaust fan shall be nonferrous or the fan shall be constructed so that a shift of the impeller or shaft will not permit two ferrous parts of the fan to rub or strike. There shall be ample clearance between the rotating element and fan casing to avoid a fire by friction, 157 (Log #CP15) (6.2) : Accept RECOMMENDATION: Revise 6.2 to read: 6.2 There shall be not more than three approved flammable liquid storage cabinets in any single process area without the approval of the authority having jurisdiction. Storage cabinets shall be listed or shall be designed and constructed to meet the requirements of NFPA 30, Flammable and Combustible Liquids Code. Any single cabinet shall contain not more than 450 L (120 gal) of Class I, Class II, or Class IIIA liquids, of which not more than 227 L (60 gal) shall be Class I and Class II liquids. SUBSTANTIATION: Correlate with NFPA 30. (Log #CP29) (Chapter 7) : Accept RECOMMENDATION: Revise Chapter 7 to read as follows: 7.1* General. Where required by the authority having jurisdiction, areas in which dipping or coating operations are conducted shall be protected with an approved automatic sprinkler system. The system shall be designed and installed in accordance with the requirements of NFPA 13, Standard for the Installation of Sprinkler Systems. 7-2 Automatic Fire Protection Systems. Dipping and coating processes shall be protected with an approved automatic fire protection system and shall be permitted to be any of the following: (a)* A water spray extinguishing system that meets the requirements of NFPA 15, Standard for Water Spray Fixed Systems for Fire Protection. (b) A foam extinguishing system that meets the requirements of NFPA 11, Standard for Low-Expansion Foam. In selecting the specific foam agent to be used, the following shall be considered: 1. The characteristics of the process, for example the freeboard in the process tank 2. The coating material and its effect on foam formation and the possibility of producing frothing 3. The use of wetting agents in the coating that are capable of preventing foam formation 4. The effect of other extinguishing agents on the foam blanket. Exception: Water spray shall be permitted to be used to protect hoods and ducts. (c) A carbon dioxide extinguishing system that meets the requirements of NFPA 12, Standard on Carbon Dioxide Extinguishing Systems. (d) A dry chemical extinguishing system that meets the requirements of NFPA 17, Standard for Dry Chemical Extinguishing Systems. (e) A gaseous agent extinguishing system that meets the requirements of NFPA 2001, Standard on Clean Agent Fire Extinguishing Systems.

8 (f) A sprinkler system that meets the requirements of NFPA 13, Standard for the Installation of Sprinkler Systems, for tanks containing liquids having flash points above 200 F (93 C) and for associated process hazards. (g) A sprinkler system that meets the requirements of NFPA 13, Standard for the Installation of Sprinkler Systems, for tanks equipped with a tank cover arranged to close automatically in the event of fire Ventilation and exhaust systems for dipping and coating processes shall remain functioning during any fire alarm condition. Exception: Where the type of automatic fire protection system used requires that ventilation be discontinued, air make-up and exhaust systems shall be permitted to be shut down and dampers shall be permitted to close. 7-3* Automatic Fire Protection for Small Processes. Automatic closing process tank covers or automatic fire protection systems that meet the requirements of Section 7-2 shall be provided for open tanks under 570 L (150 gal) capacity or less than 1 m 2 (10 ft 2 ) in liquid surface area Automatic closing process tank covers shall be actuated by approved automatic devices and also shall be arranged for manual operation Covers shall be substantially constructed of noncombustible materials and shall overlap the sides of the tank by at least 25 mm (1 in.) and have a recess or flange that extends downward around the tank when it is closed Chains, wire ropes, or other approved noncombustible apparatus shall be used to support the cover or the operating mechanism. All pulleys, catches, and other fasteners shall be metal and shall be attached to noncombustible mountings Covers shall be kept closed when the process is not in operation Where drain boards return drippings to the tank, special means shall be provided to permit the cover to close tightly and prevent water from sprinklers or other sources from draining into the process tank. 7-4* Automatic fire protection for enclosed and large processes. Automatic fire protection systems that meet the requirements of 7-2 shall be provided for enclosed processes, for open processes with peripheral vapor containment and ventilation, and for process tanks equal to or greater than 570 L (150 gal) capacity or equal to or greater than 1 m 2 (10 ft 2 ) in liquid surface area. The systems shall be designed to protect the following areas: (a) For dip tanks, the system shall protect the tank, its drain board, freshly coated objects or material, and any hoods and ducts. (b) For flow coaters, the system shall protect open tanks, vapor drying tunnels, and ducts. Pumps circulating the coating material shall be interlocked to shut off automatically in the event of fire. (c)for curtain and roll coaters or similar processes, the system shall protect the coated objects or material and open troughs or tanks containing coating materials. Pumps circulating the coating material shall be interlocked to shut off automatically in the event of fire. Exception: Approved automatic-closing process tank covers or automatic fire protection systems that meet the requirements of Section 7-2 shall be permitted for enclosed systems that do not exceed 570 L (150 gal) capacity or 1 m 2 (10 ft 2 ) in liquid surface area and for open processes with peripheral vapor containment and ventilation 7-4.1* The automatic fire protection system shall be designed to simultaneously discharge into the entire protected area, as described in 7-4 (a) through (c). 7-5 Portable Fire Extinguishers. Portable fire extinguishers shall be provided and located in accordance with NFPA 10, standard for portable fire extinguishers. SUBSTANTIATION: Chapter 7 has been rewritten to parallel changes made in Chapter 7 of NFPA 33. Section 7.2 of the current edition of NFPA 34 has been deleted because it duplicated requirements elsewhere in the standard. COMMENT ON AFFIRMATIVE: SHEA: Section 7-1 Delete where required by AHJ. (Log #CP18) (8.1 (new)) : Accept RECOMMENDATION: Add a new 8.1 to read: 8.1 Scope. This chapter shall apply to operation and maintenance of dipping and coating processes. (Log #CP16) (8.2) : Accept RECOMMENDATION: Revise 8.2 to read: 8.2* Waste Containers. Approved waste containers shall be provided for rags or waste impregnated with flammable or combustible material and all such rags or waste shall be deposited therein immediately after use. The contents of waste cans shall be properly disposed of at least once daily or at the end of each shift. (Log #CP17) (8.3) : Accept RECOMMENDATION: Revise 8.3 to read: 8.3* Inspection and Testing. Inspections and tests of all process tanks, including covers, overflow pipe inlets, overflow outlets, and discharges, bottom drains, pumps and valves, electrical wiring and utilization equipment, bonding and grounding connections, ventilation systems, and all extinguishing equipment shall be made monthly. Any defects found shall be promptly corrected. SUBSTANTIATION: Eliminate ambiguous text. (Log #CP19) (8.5) : Accept RECOMMENDATION: Revise 8.5 to read: 8.5 Smoking. NO SMOKING OR OPEN FLAMES signs in large letters on contrasting color background shall be conspicuously posted at all dipping and coating areas and paint storage rooms. (Log #CP20) (9.6) : Accept RECOMMENDATION: Revise 9.6 to read: 9.6 Electrical Safety Requirements. Electrostatic apparatus shall be equipped with automatic means that will rapidly de-energize and ground the high voltage elements and signal the operator under any of the following conditions: (1) Stopping of ventilating fans or failure of ventilating equipment from any cause (2) Stopping of the conveyor carrying the objects or material through the high voltage field (3) Occurrence of a fault to ground or excessive current leakage at any point on the high voltage system (4) Reduction of clearances below that specified in (5) De-energizing of the primary side of the power supply SUBSTANTIATION: Clarify the requirement for de-energizing the system by requiring the circuitry to be also grounded, so that energy is drained from the system. 158

9 (Log #CP21) (Log #CP23) (9.7) : Accept (10.1.1) : Accept RECOMMENDATION: Revise 9.7 to read: 9.7 Personnel Safety. RECOMMENDATION: Revise to read: Safeguards such as enclosures, fencing, railings, or other means shall be Personnel required to handle or use flammable or combustible placed about the equipment or incorporated therein so that they, either by materials shall be instructed in the safe handling, storage, and use of the their location or character or both, ensure that a safe isolation of the process is materials, as well as the emergency procedures that might be required. maintained from plant storage or personnel. (Log #CP22) (10.1) : Accept RECOMMENDATION: Revise 10.1 to read: 10.1* General. All personnel involved in dipping or coating processes covered by this standard shall be instructed in the potential safety and health hazards; the operational, maintenance, and emergency procedures required; and the importance of constant operator awareness (10.1.3) : Accept RECOMMENDATION: Revise to read: (Log #CP24) All personnel shall be instructed in the proper use, maintenance, and storage of all emergency, safety, or personal protective equipment that they might be required to use in their normal work performance. 159