• Share
  • Email
  • Embed
  • Like
  • Save
  • Private Content
Spray Finishing Materials
 

Spray Finishing Materials

on

  • 3,449 views

 

Statistics

Views

Total Views
3,449
Views on SlideShare
3,446
Embed Views
3

Actions

Likes
0
Downloads
186
Comments
0

2 Embeds 3

http://www.slideshare.net 2
http://health.medicbd.com 1

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Spray Finishing Materials Spray Finishing Materials Presentation Transcript

  • SPRAY FINISHING USING FLAMMABLE AND COMBUSTIBLE MATERIALS 29 CFR 1910.107, Subpart H Samuel D. Yates, Corporate Safety and Environmental Meadowcraft, Inc . [email_address]
    • Spray application of flammable and combustible liquids presents a fire and explosion hazard that requires specific controls. Flammable and even combustible liquids are readily ignited when suspended in the air as a fine mist and suspended powder particles and dust can be explosive. Overspray residue is often combustible, thus presenting a fire hazard both during the spray application and also after the spray application is complete.
    • The National Fire Protection Association (NFPA) Code #33, “ Spray Application Using Flammable and Combustible Materials” is the nationwide governing code in this process.
  • APPLICABLE DEFINITIONS
    • (1) Aerated solid powders. Aerated powders are any powdered material that is used as a coating material and shall be fluidized within a container by passing air uniformly from below (Similar to the operation of quicksand). It is common practice to fluidize such materials to form a fluidized powder bed and then dip the part to be coated into the bed in a manner similar to liquid dipping. Such beds are also used as sources for powder spray operations.
    • (2) Spraying area. Any area in which dangerous quantities of flammable vapors or mists, or combustible residues, dusts, or deposits are present due to the operation of spraying processes.
    • (3) Spray booth. A power-ventilated structure provided to enclose or accommodate a spraying operation to confine and limit the escape of spray, vapor, and residue, and to safely conduct or direct them to an exhaust system.
    • (4) Waterwash spray booth. A spray booth equipped with a water washing system designed to minimize dusts or residues entering exhaust ducts and to permit the recovery of overspray finishing material.
    • (5) Dry spray booth. A spray booth not equipped with a water washing system as described above. A dry spray both may be equipped with: (i) distri-
    • bution or baffle plates to promote an even flow of air through the booth or cause the deposit of overspray before it enters the exhaust duct; or (ii) overspray dry filters to minimize dusts; or (iii) overspray dry filter rolls designed to minimize dusts or residues entering exhaust ducts; or (iv) overspray dry filter rolls designed to minimize dusts or residues entering exhaust ducts; or (v) where dry powders are being sprayed with powder collection systems so arranged in the exhaust to capture oversprayed material.
    • (6) Fluidized bed. A container holding powder coating material which is aerated from below so as to form an air-supported expanded cloud of such material through which the preheated object to be coated is immersed and transported.
    • (7) Electrostatic fluidized bed. A container holding powder coating material which is aerated from below so as to form an air-supported expanded cloud of such material which is electrically charged with a charge opposite to the charge of the object to be coated; such object is transported through the container immediately above the charged and aerated materials in order to be coated.
    • (8) Approved. Shall mean approve and listed by a nationally recognized testing laboratory.
    • (9) Listed. See “approved” in 1910.107(a)(8).
  • POWDER PAINT SYSTEM
  • SPRAY BOOTHS
    • LOCATION
    • Spray booths and all associated operations
    • such as paint mixing and setup areas
    • should be in a designated location away
    • from spark producing or open flame equip-
    • ment such as welding, cutting, heat
    • treating or heaters.
    • Smoking should be strictly prohibited and
    • signs prohibiting smoking should be prominently
    • posted.
    • Flooring must be non-combustible and easy to
    • clean.
  • SPRAY BOOTHS
      • CONSTRUCTION
      • Spray booths should be constructed of 18
      • gauge steel.
      • All areas of the booth must be accessible for
      • maintenance and cleaning. When necessary to
      • facilitate cleaning, exhaust ducts shall be pro-
      • vided with an ample number of access doors.
      • Exhaust ducts should be run as direct as
      • possible and should be well supported. A min-
      • imum clearance of 18” is needed from the duct to any
      • combustible roof or other construction. This distance may be reduced to as little as three inches if protected in
      • accordance with NFPA #33.
    • SPRAY EQUIPMENT
    • All spray equipment, mixers, pumps, etc.
    • should be specifically designed and manu-
    • factured for flammable spray applications.
    • All spray equipment should be interlocked
    • with the booth system so that the equip-
    • ment will not operate unless the ventilation
    • system is working.
    • VENTILATION
    • The exhaust ventilation system must pro-
    • vide a minimum airflow of 100 linear feet
    • per minute across all both openings except
    • for electrostatic spraying operations where
    • the minimum air flow may be 60 linear
    • feet per minute or more, depending on the
    • volume of the finishing material being
    • applied and its flammability and explosion
    • characteristics.
    • VENTILATION
    • Visible gauges or audible alarm or pressure
    • activated devices shall be installed to
    • indicate or insure that the required air
    • velocity is maintained. Filter rolls shall be
    • inspected to insure proper replacement of
    • filter media.
    • VENTILATION
    • The exhaust fan shall be solidly mounted
    • and secured, with non-sparking, non-
    • ferrous blades. The fan electric motor must
    • be located outside the duct and suitable for
    • hazardous locations and fan belts may not
    • enter the duct unless the belt and pulley
    • within the duct are completely enclosed.
    • VENTILATION
    • The ventilation system must be equipped
    • with some type of noncombustible filter
    • system. Mesh filters are preferred over the
    • baffle type, but must be periodically
    • replaced. Mesh filters cannot be used when
    • applying a spray material that is highly
    • susceptible to spontaneous heating and
    • ignition.
    • VENTILATION
    • Metal baffle type filters may also be used.
    • However, one of the safest and most effic-
    • ient filter systems is the water wash system,
    • where the vapor laden air is drawn through
    • a recirculating water curtain which traps
    • the overspray particles. The water must be
    • changed on a schedule established by the
    • manufacturer.
    • ELECTRICAL
    • In general, there should be no electrical
    • equipment, switches, lights, etc. located
    • inside a spray booth.
    • Electrical wiring, lighting fixtures and
    • equipment located in the spray booth must
    • meet Class I, Division I specifications of
    • the National Electrical Code (NEC).
    • Lights may be located above the spray booth,
    • behind a substantial glass panel, which is sealed
    • to prevent leakage of vapors or mists at the edge.
    • Example of a light fixture mounted outside of the spray area and serviced from outside the spray area. From NFPA 33.
    • A second method of mounting light fixtures is acceptable.
    Examples of light fixtures that are an integral part of the spray area and are serviced from inside the spray area. NFPA 33
    • ELECTRICAL
    • All metal parts of the spray booth, duct,
    • etc., must be properly electrically
    • grounded in an effective and permanent
    • manner.
    • Electrical features located outside, but
    • immediately adjacent to the spray booth
    • must meet the following provision:
    • (1) If the ventilation system is interlocked with
    • the spray equipment, areas 5 feet horizontally
    • and 3 feet vertically from all openings shall
    • meet Class I, Division 2 specifications of the NEC.
    • (2) If the ventilation system is not interlocked with spray
    • equipment , areas 10 feet horizontally and 3 feet vertically from
    • all openings shall meet Class I, Division 2 NEC specifications.
    • FIRE PROTECTION
    • All spraying operations utilizing flammable
    • or combustible materials must be pro-
    • tected by an automatic sprinkler system
    • installed in the booth, behind the filters,
    • and in the exhaust duct. Installation
    • should conform to NFPA Code #13.
  • Typical Sprinkler Arrangement From “ TECH Bulletin: Spray Booths”, Frankenmuth Insurance
    • FIRE PROTECTION
    • Sprinkler head coverage should not exceed
    • 90 square feet per head, with a water supply
    • delivered at a pressure of 25 psi. The
    • water supply to the sprinkler heads should
    • have a separate control valve.
    • Sprinkler heads should be covered with a
    • protective covering of lightweight cellophane,
    • polyethylene or paper bags to prevent the accum-
    • ulation of overspray which would affect the
    • operation of the sprinkler head.
    • FIRE PROTECTION
    • Where there is no water available, dry
    • chemical, CO 2 , and other extinguishing
    • systems are acceptable if installed to code.
    • CONVEYORS
    • Where conveyors are arranged to carry work into or out of spray booths, the openings
    • shall be as small as practical.
    • STORAGE AND HANDLING OF FLAMMABLE AND COMBUSTIBLE LIQUIDS
    • CONFORMNCE
    • The storage of flammable or combustible
    • liquids in connection with spraying opera-
    • tions shall conform to the requirements of
    • 1910.106 where practical.
    • STORAGE AND HANDLING OF FLAMMABLE AND COMBUSTIBLE LIQUIDS
    • QUANTITY STORED
    • The quantity of flammable or combustible
    • liquids allowed to be stored in the vicinity
    • of a spraying operation shall be the min-
    • imum required for operations and should
    • not exceed a supply for 1 day or one shift.
    • STORAGE AND HANDLING OF FLAMMABLE AND COMBUSTIBLE LIQUIDS
    • Bulk storage of portable containers of
    • flammable or combustible liquids shall be
    • in a separate, constructed building de-
    • tached from other important buildings or
    • cut off in a standard manner.
    • STORAGE AND HANDLING OF FLAMMABLE AND COMBUSTIBLE LIQUIDS
    • CONTAINERS
    • Original closed containers, approved port-
    • able tanks, approved safety cans or a
    • properly arranged system of piping shall be
    • used for bringing flammable or combus-
    • tible liquids into a spray finishing room. No
    • open or glass containers shall be used.
    • STORAGE AND HANDLING OF FLAMMABLE AND COMBUSTIBLE LIQUIDS
    • TRANSFERRING LIQUIDS
    • Withdrawal of liquids from containers of
    • greater than 60 gallons must be by
    • approved pump.
    • Withdrawal or transfer of flammable liquids
    • from containers and the filling of con-
    • tainers shall be done only in a suitable
    • mixing room or in a spraying area when the ven-
    • tilation system is in operation.
    • STORAGE AND HANDLING OF FLAMMABLE AND COMBUSTIBLE LIQUIDS
    • Adequate precautions shall be taken to
    • protect against liquid spillage and sources
    • of ignition.
    • STORAGE AND HANDLING OF FLAMMABLE AND COMBUSTIBLE LIQUIDS
    • SPRAYING CONTAINERS SUPPLYING
    • SPRAY NOZZLES:
    • Shall be of closed type or provided with metal covers kept closed.
    • Shall either rest on floor, be on metal
    • supports or suspended by wire cables.
    • STORAGE AND HANDLING OF FLAMMABLE AND COMBUSTIBLE LIQUIDS
    • SPRAYING CONTAINERS SUPPLYING
    • SPRAY NOZZLES:
    • Shall not exceed 10 gallons capacity if
    • feeding nozzles by gravity flow.
    • Original shipping containers shall not be
    • subject to air pressure for supplying spray
    • nozzles. (DON’T PRESSURIZE SHIPPING
    • CONTAINER).
    • STORAGE AND HANDLING OF FLAMMABLE AND COMBUSTIBLE LIQUIDS
    • SPRAYING CONTAINERS SUPPLYING
    • SPRAY NOZZLES:
    • Containers under air pressure shall be of
    • limited capacity and shall not exceed that
    • necessary for 1 day’s operation, shall be
    • designed and approved for such use, shall
    • be provided with a visible pressure gage and
    • shall be provided with a relief valve.
    • STORAGE AND HANDLING OF FLAMMABLE AND COMBUSTIBLE LIQUIDS
    • SPRAYING CONTAINERS SUPPLYING
    • SPRAY NOZZLES:
    • Containers under air pressure supplying
    • spray nozzles, air-storage tanks and
    • coolers must conform to the standards of
    • The Code for Unfired Pressure Vessels,
    • Section VIII of the ASME Boiler and Pressure
    • Vessel Code – 1968 for construction, tests and
    • maintenance.
    • OPERATIONS AND MAINTENANCE
    • Spraying – Spraying shall not be conducted
    • outside of predetermined spraying areas.
    • Cleaning – All spraying areas shall be kept
    • as free from the accumulation of deposits
    • of combustible residues as practical, with
    • cleaning conducted daily if necessary.
    • Scrapers, spuds, or other such tools used
    • for cleaning must be made of nonsparking
    • material.
    • OPERATIONS AND MAINTENANCE
    • Residue Disposal – Residue scrapings and
    • other debris contaminated with residue
    • shall be immediately removed from the
    • premises and properly disposed of.
    • Approved metal waste cans shall be pro-
    • vided wherever rags or waste are impreg-
    • nated with finishing material and all rags
    • or wastes deposited in the cans after use.
    • The contents of the waste cans shall be properly
    • disposed of at least once daily or at the end of
    • each shift.
    • OPERATIONS AND MAINTENANCE
    • Clothing Storage – Spray finishing em-
    • ployees’ clothing shall not be left on the
    • premises overnight unless kept in metal
    • lockers.
    • OPERATIONS AND MAINTENANCE
    • Cleaning Solvents – Use of solvents for
    • cleaning operations is restricted to those
    • having flashpoints of not less than 100 o F.
    • For cleaning spray nozzles and auxiliary
    • equipment, solvents having flashpoints
    • not less than those normally used in spray
    • operations may be used. Cleaning shall
    • be done in spray booths with the venti-
    • lation equipment running during cleaning.
    • OPERATIONS AND MAINTENANCE
    • Hazardous Materials Combinations –
    • Spray booths shall not be alternately used
    • for different types of coating materials
    • where the combination of materials may be
    • conducive to spontaneous ignition, unless
    • all deposits of the first material used are
    • removed from the booth and exhaust ducts
    • prior to spraying with the second material.
    • OPERATIONS AND MAINTENANCE
    • “ No Smoking” signs in large letters on
    • contrasting color background shall be
    • conspicuously posted at all spraying
    • areas and paint storage rooms.
    • FIXED ELECTROSTATIC APPARATUS
    • CONFORMANCE
    • Installation and use shall conform to all
    • requirements of 1910.107 and to the special
    • requirements for fixed electrostatic
    • apparatus.
    • FIXED ELECTROSTATIC APPARATUS
    • Electrostatic apparatus and devices must
    • be of approved types.
    • Transformers, power packs, control
    • apparatus, and all other electrical portions
    • of the equipment, with the exception of
    • high-voltage grids, electrodes, and electro-
    • static atomizing heads and their connec-
    • tions shall either be located outside the spraying
    • area or conform to the electrical requirements of
    • paragraph (c).
    • FIXED ELECTROSTATIC APPARATUS
    • Electrodes and electrostatic atomizing
    • heads must be adequately supported in
    • permanent locations and effectively in-
    • sulated from the ground. Insulators must
    • nonporous and noncombustible.
    • High-voltage leads to electrodes must be
    • properly insulated and protected from
    • mechanical injury or exposure to destructive
    • chemicals.
    • FIXED ELECTROSTATIC APPARATUS
    • A safe distance must be maintained be-
    • tween goods being painted and electrodes
    • or electrostatic atomizing heads or con-
    • ductors of at east twice the sparking dis-
    • tance. A sign shall be posted indicating
    • safe distnce.
    • FIXED ELECTROSTATIC APPARATUS
    • Goods being painted using this process
    • must be transported by conveyor and a
    • safe distance must be maintained be-
    • the goods and the electrodes or atomizing
    • heads.
    • FIXED ELECTROSTATIC APPARATUS
    • PROHIBITED : This process is not accep-
    • table where goods being coated are manip-
    • ulated by hand.
    • FIXED ELECTROSTATIC APPARATUS
    • Electrostatic apparatus shall be equipped
    • with automatic controls that will operate
    • without time delay to disconnect the power
    • supply to the high voltage transformer and
    • to signal the operator for any of the
    • following conditions:
    • Failure of ventilating equipment for any
    • cause.
    • Stoppage of the conveyor carrying goods
    • through the high voltage field.
    • Occurrence of a ground or of an imminent
    • ground at any point on the high voltage
    • system.
    • Reduction of the safe distance to below that
    • specified.
    • FIXED ELECTROSTATIC APPARATUS
    • GUARDING
    • Equipment must be guarded by adequately
    • grounded conductive material. Guarding must
    • effectively isolate the process from plant
    • storage or personnel.
    • FIXED ELECTROSTATIC APPARATUS
    • Ventilation. The ventilation system must
    • insure safe conditions from a fire and
    • health standpoint.
    • Fire Protection. All areas used for spraying,
    • including the interior of the booth must be
    • protected by automatic sprinklers or other
    • approved automatic extinguishing equipment.
    • ELECTROSTATIC HAND SPRAYING
    • EQUIPMENT
    • This includes any equipment using electro-
    • statically charged elements for the atomization
    • and/or precipitation of materials for coatings
    • on articles or for other similar purposes in
    • which the atomizing device is hand held and
    • manipulated during the spraying operation.
    • ELECTROSTATIC HAND SPRAYING
    • EQUIPMENT
    • CONFORMANCE
    • Electrostatic hand spraying equipment must
    • conform to all provisions of the standard.
    • ELECTROSTATIC HAND SPRAYING
    • EQUIPMENT
    • Equipment Approval And Specifications:
    • Equipment must b of approved types.
    • High voltage circuits must not produce a
    • spark of sufficient intensity to ignite any
    • vapor-air mixtures or result in an
    • appreciable shock if coming in ground con-
    • tact.
    • ELECTROSTATIC HAND SPRAYING
    • EQUIPMENT
    • Equipment Approval And Specifications:
    • The electrostatically charged exposed ele-
    • ments of the handgun shall be capable of
    • being energized only by a switch that also
    • controls the coating material supply.
    • ELECTROSTATIC HAND SPRAYING
    • EQUIPMENT
    • Electrical Support Equipment:
    • All electrical equipment with the exception
    • of the handgun and its connections to the
    • power supply shall be located outside the
    • spraying area or be in compliance with
    • paragraph (c) of this standard.
    • ELECTROSTATIC HAND SPRAYING
    • EQUIPMENT
    • Grounding
    • All electrically conductive objects in the
    • spraying area must be grounded.
    • Warnings regarding the necessity of
    • grounding must be permanently affixed to
    • the equipment.
    • ELECTROSTATIC HAND SPRAYING
    • EQUIPMENT
    • Maintenance of Grounds
    • Objects being painted or coated must be
    • maintained in metallic contact with the
    • conveyor or other grounded support.
    • Hooks shall have knife edges where
    • possible.
    • ELECTROSTATIC HAND SPRAYING
    • EQUIPMENT
    • Interlocks
    • The electrical equipment is to be inter-
    • locked with the ventilation of the spraying
    • area so that the equipment cannot be
    • operated unless the ventilation fans are in
    • operation.
    • ELECTROSTATIC HAND SPRAYING
    • EQUIPMENT
    • Ventilation
    • The spraying operation shall take place
    • within an adequately ventilated spraying
    • area.
    • DRYING, CURING, OR FUSION APPARATUS
    • Conformance:
    • Drying, curing, or fusion apparatus used in
    • conjunction with the spray application of
    • flammable or combustible finishes must con-
    • form to the Standard for Ovens and Furnaces,
    • NFPA 86A-1969, which is incorporated by
    • reference into OSHA standards.
    • DRYING, CURING, OR FUSION APPARATUS
    • Prohibition of Alternate Use
    • Spray booths, rooms, or other enclosures used
    • for spraying shall not be alternately used for
    • the purpose of drying by any arrangement that
    • will cause a material increase in the surface
    • temperature of the spray booth, room or en-
    • closure.
    • DRYING, CURING, OR FUSION APPARATUS
    • Adjacent Systems Interlocked
    • Drying, curing, or fusion systems utilizing an
    • open flame heating system or one that may
    • produce sparks may be installed adjacent to a
    • spraying area when equipped with an inter-
    • locked ventilation system that can:
    • DRYING, CURING, OR FUSION APPARATUS
    • Thoroughly ventilate the drying space
    • before the heating system can be started.
    • Maintain a safe atmosphere at any source
    • of ignition.
    • Automatically shut down the heating
    • system in the event of failure of the venti-
    • ating system.
    • DRYING, CURING, OR FUSION APPARATUS
    • Permitted Alternate Use
    • Automobile refinishing spray booths that are
    • otherwise in full conformity with this standard
    • may be alternately used for drying with port-
    • able infrared drying apparatus under the
    • following conditions:
    • DRYING, CURING, OR FUSION APPARATUS
    • Interiors of spray areas must be kept free
    • of overspray deposits.
    • During spraying operations, the drying
    • apparatus and electrical connections for
    • wiring cannot be located in the spray en-
    • closure or in any other location where spray
    • residues may be deposited on the drying
    • apparatus or electrical connections.
    • DRYING, CURING, OR FUSION APPARATUS
    • The spraying and drying apparatus and the
    • ventilation system of the spray enclosure
    • must be equipped with suitable interlocks
    • so that:
        • 1. The spraying apparatus can’t be operated while the drying apparatus is in the spray enclosure.
    • DRYING, CURING, OR FUSION APPARATUS
    • 2. The spray enclosure will be purged of
    • spray vapors for a period of not less
    • than 3 minutes before the drying
    • apparatus can be energized.
    • 3. The ventilating system will maintain a
    • safe atmosphere within the enclosure
    • during the drying process and the
    • drying apparatus will automatically
    • shut off in the event of the failure of
    • the ventilating system.
    • DRYING, CURING, OR FUSION APPARATUS
    • All electrical wiring and equipment must con-
    • form to the requirements of Subpart S (Elec-
    • trical). Only equipment approved for Class I,
    • Division 2 hazardous locations can be located
    • within 18 inches of the floor level. All metallic
    • parts shall be properly electrically bonded and
    • grounded.
    • DRYING, CURING, OR FUSION APPARATUS
    • The drying apparatus shall contain a prom-
    • inently located, permanently attached warning
    • sign stating that ventilation should be main-
    • tained during the drying period and that
    • spraying should not be conducted so that
    • spray will deposit on apparatus.
    • Automobile Undercoating in Garages
    • Automobile undercoating spray operations in
    • garages that have adequate ventilation are
    • exempt from the requirements pertaining to
    • spray finishing operations when using under-
    • coating materials not any more hazardous
    • than kerosene or using only solvents having a
    • flash point of greater than 100 o .
    • POWDER COATING
    • Electrical and other sources of ignition.
    • Electrical equipment and other sources of
    • ignition must conform to both this section
    • and to Subpart S.
    • Exhaust ventilation must be sufficient to
    • maintain the atmosphere below the lowest
    • explosive limits for the materials being
    • applied.
    • POWDER COATING
    • All nondeposited air-suspended powders
    • must be safely removed by exhaust ducts
    • to the powder recovery cyclone or re-
    • ceptacle.
    • Powders shall not b released to the out-
    • side atmosphere.
    • POWDER COATING
    • The provisions of the Standard for ovens
    • and furnaces, NFPA No. 86A-1969 shall
    • apply to drying, curing, or fusion quipmnt.
    • All areas shall be kept free of accumu-
    • lations of powder coating dusts.
    • Surfaces shall be cleaned in a manner to avoid
    • scattering dusts or creating dust clouds.
    • POWDER COATING
    • “ No Smoking” signs in large areas on con-
    • trasting color backgrounds shall be
    • conspicuously posted at all powder coating
    • areas and powder storage rooms.
    • POWDER COATING
    • Fixed Electrostatic Spraying Equipment
    • Shall conform to requirements of paragraph
    • (h) and Subpart S.
    • POWDER COATING
    • Electrostatic Hand Spraying Equipment
    • Shall conform to the requirements of
    • paragraph (i) and Subpart S.
    • POWDER COATING
    • Electrostatic Fluidized Beds
    • Shall be of approved typs.
    • Maximum surface temperature of this eq-
    • ment in the coating area must not exceed
    • 150 o F.
    • High voltage circuits may not produce a
    • spark of sufficient intensity to ignite any
    • powder-air mixtures.
    • POWDER COATING
    • All electrical portions of the equipment
    • with the exception of the charging elec-
    • trodes and their power supply connections
    • shall be located outside of the powder
    • coating area.
    • All electrically conductive objects within
    • the charging influence of the electrodes
    • shall be adequately grounded. Warning signs
    • shall be displayed.
    • POWDER COATING
    • Objects being coated must be in contact
    • with the conveyor or other support to in-
    • sure proper grounding. Hangers shall be
    • regularly cleaned to insure effective con-
    • tact and areas of contact shall be sharp
    • points or knife edges where possible.
    • POWDER COATING
    • The electrical system shall be interlocked
    • with the ventilation system so that the
    • equipment cannot be operated unless the
    • ventilation fans are in operation.
    • ORGANIC PEROXIDES AND DUAL
    • COMPONENT COATING
    • All spraying operations involving the use of
    • organic peroxides and other dual com-
    • ponent coatings shall be conducted in
    • approved sprinklered spray booths that
    • meet the requirements of this section.
    • ORGANIC PEROXIDES AND DUAL
    • COMPONENT COATING
    • Smoking shall be prohibited and “No
    • Smoking” signs shall be prominently dis-
    • played.
    • Only nonsparking tools shall be used in
    • any area where orgaic peroxides are stored,
    • mixed, or applied.
    • RFERENCES
    • (1) NFPA 33, Standard for Spray Application
    • Using Flammable or Combustible Materials, 2000 Edition
    • (2) TECH Bulletin: Spray Booths,
    • Frankenmuth Insurance
    • (3) NFPA 86, Standard for Ovens and
    • Furnaces, 2000 Edition (Update of 86A-1969)