nfpa 33 powder coating

7.9.4 Exhaust ducts shall not use building walls, floors, ceilings, or roofs as component parts. This section of NFPA 33 references other parts of the NFPA code and it is important to be familiar with all applicable codes in order to ensure a successful spraying operation. The general requirements for mixing paints and ventilation within a mix room are outlined. 7.8.2 Concrete shall be permitted to be used. Restrictions on spark producing equipment and/or processes. Standard for Spray Application Using Flammable or Combustible Materials, Access 300+ codes online including the most current requirements and previous editions, © National Fire Protection Association (NFPA) 2020, National Fire Codes® Subscription Service, The value of Standards Development Organizations, Alternative Fuel Vehicles Safety Training, Spanish-language seminars in Latin America and Spain, Safety in living and entertainment spaces. As defined in 500.5(C) (1) of NFPA 70, a Class II, Division 1 location shall be any location where one of the following conditions exists: (1) Combustible dust is in the air in quantities sufficient to produce explosive or ignitible mixtures under normal operating conditions. (7) Mixing rooms shall be classified for purposes of electrical area classification in accordance with Chapter 7 of NFPA 30. 13.3* Spray Booths and Spray Rooms Used for Drying at Elevated Temperatures. N Automated powder application equipment, both listed and unlisted, shall be further protected by listed optical flame detection, installed and supervised in accordance with NFPA 72. 8.5.1 Liquids shall be transported by means of closed containers, approved safety cans, or approved portable tanks or shall be transferred by means of a piping system. Restrictions for construction and location of exhaust fans and drives. 15.8.2Air exhausted from the recovery system of a powder operation shall not be recirculated unless the concentration of particulate matter in the exhaust air has been reduced to a level that is considered safe for personnel occupational exposure and equipment continuously monitors the filtration system to signal the operator and to automatically shut down the operation in the event the filtration system fails to maintain the air in this condition. (3) A Class I, Division 2 location shall be permitted to be alternatively classified as a Class I, Zone 2 location. 15.13.1 The high-voltage circuits shall be designed so that any discharge produced when the charging electrodes of the bed are approached or contacted by a grounded object cannot produce a spark that is capable of igniting the most hazardous powder-air mixture. 6.2.6* Any utilization equipment or apparatus that is capable of producing sparks or particles of hot metal and that is located above or adjacent to either the spray area or the surrounding Division 2, Zone 2, or Zone 22 areas shall be of the totally enclosed type or shall be constructed to prevent the escape of sparks or particles of hot metal. Privacy Policy Air exhausted from spray areas shall not be recirculated unless all of the following requirements are met: (6)* For occupied spray areas where a portion of the exhaust air is recirculated within the spray area, toxicity and worker exposures shall be addressed. Here are (5) key chapters from NFPA that you should know as they pertain to spray booth design and installation and are further discussed below…, Chapter 5: Construction and Design of Spray Areas, Spray Rooms, and Spray Booths The final section of this code outlines the allowable construction materials of exhaust fans and drives as well as restrictions on where exhaust fan components can be located within a spraying operation. N Listed spray booth assemblies that are constructed of other materials shall be permitted. N The requirements of shall not apply to a closed-head wet pipe automatic sprinkler system. This code also references specific warning signs that need to be in place to indicate when a drying process is taking place and that can restrict access when high temperatures are involved. (c) These devices shall activate the fire protection system as specified in 15.5.2 for the affected automated zone, if applicable, and accomplish the requirements in Mechanical ventilation shall be kept in operation at all times while spray operations are being conducted and for a sufficient time thereafter to allow the vapors from drying coated objects or material and residues to be exhausted. (4) A Class II, Division 1 location shall be permitted to be alternatively classified as a Zone 21 location. 7.9.3 Hangers and supports shall be designed to allow for expansion and contraction. 5.1.3 Aluminum shall not be used for structural support members, walls, or ceilings that enclose a spray area or for ventilation ductwork to or from an enclosed spray area unless otherwise permitted by The powder coating equipment shall carry a prominent, permanently installed warning regarding the necessity for grounding these objects. (7) Exhaust duct shall not discharge in the direction of any unprotected opening in any noncombustible or limitedcombustible construction that is within 7625 mm (25 ft) of the exhaust duct discharge point. The liability to your business for violation can be far-reaching.The Fabricator can’t be too cavalier about these codes and standards. For automated spray application operations, one or more manual emergency system shutdown stations shall be installed to serve each spray area in accordance with the following requirements: (1) When activated, the stations shall accomplish at least the functions listed in 15.5.3 and The installation and use of powder coating application apparatus shall comply with the requirements of this chapter and also shall comply with the applicable requirements of all other chapters. 15.16.2* Bins, hoppers, and fluid beds shall be vented to prevent the accumulation of powder outside of the application process in accordance with 15.8.4. Chapter 15 of NFPA 33 covers the general requirements for powder coating applications. (2) A Class I, Division 1 location shall be permitted to be alternatively classified as a Class I, Zone 1 location. 5.6.4 Observation panels for spray booths that are used exclusively for powder coating processes shall be permitted to be constructed of fire-resistant combustible materials. We believe that keeping all these codes in mind during the design phase is the only way to prevent any complications down the road. (2) An ignitible concentration of flammable gas or vapor is normally prevented by positive mechanical ventilation but might exist because of failure or abnormal operation of the ventilating equipment. 15.4 Location. (4) Mixing rooms shall be designed to contain a spill of the contents in the room. (IFCI), and National Fire Protection Association (NFPA) - whose standards impact the design and operation of powder coating systems. A.1.1 The risk to life and property because of the fire and explosion hazards of spray application of flammable and combustible materials varies depending on the arrangement and operation of the particular process and on the nature of the material being sprayed. Guidelines for luminaires located within a spray booth. (3) An air-cleaning system is provided to reduce the amount of overspray carried into the duct manifold. The Standard also includes … The intake for this make-up air shall be located so that the air exhausted from spray operations is not recirculated. 8.5.9 Compressed air shall be permitted to be used for cleaning paint delivery hose for individual applicators in a spray booth, provided both of the following requirements are met: (2) The maximum air pressure does not exceed the maximum working pressure of any component of the piping or hose system. As defined in 500.5(B) (2) of NFPA 70, a Class I, Division 2 location shall be any location where one of the following conditions exists: (1) A flammable gas or a volatile flammable liquid is handled, processed, or used, but any flammable gas, vapor, or liquid is confined within a closed container or a closed system from which it can escape only in case of accidental rupture or breakdown of the container or. 8.3.1 Dispensing or transfer of liquids from containers and filling of containers, including portable mixing tanks and “pressure pots,” shall be done only in a spray area with the ventilation in operation or in a mixing room. This requirement shall also apply to any personnel who enter the spray area. 15.12 Handheld Electrostatic Powder Spraying Equipment. 7.11.1 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.

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