NFPA 33: Standard for Spray Application Using Flammable or Combustible Materials
Current Edition: 2011 Next Edition: 2015

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NFPA 33:
2011 Edition
Item #: 3311
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What is NFPA 33?
NFPA 33: Document Scope
1.1* Scope. 1.1.1 This standard shall apply to the spray application of flammable or combustible materials, as herein defined, either continuously or intermittently by any of the following methods: (1) Compressed air atomization (2) Airless or hydraulic atomization (3) Electrostatic application methods (4) Other means of atomized application 1.1.2 This standard shall also apply to the application of flammable or combustible materials, as herein defined, either continuously or intermittently by any of the following methods: (1) Fluidized bed application methods (2) Electrostatic fluidized bed application methods (3) Other means of fluidized application 1.1.3 This standard shall also apply to spray application of water-borne, water-based, and water-reducible materials that contain flammable or combustible liquids or that produce combustible deposits or residues. 1.1.4* This standard shall not apply to spray application processes or operations that are conducted outdoors. 1.1.5* This standard shall not apply to the use of small portable spraying equipment that is not used repeatedly in the same location. 1.1.6 This standard shall not apply to the use of aerosol products in containers up to and including 710 mL (24 ounces) capacity that are not used repeatedly in the same location. (See A.1.1.5) 1.1.7 This standard shall not apply to the spray application of noncombustible materials. 1.1.8 This standard shall not apply to the hazards of toxicity or industrial health and hygiene. (See 1.2.2.)
This standard provides requirements to mitigate fire and explosion hazards of spray application processes that use flammable or combustible materials. Official document scope
What does NFPA 33 address?
Criteria apply to automated and hand-held spray application processes, as well as specific requirements for electrostatic spray systems. NFPA 33 also includes specific requirements for powder coating processes, vehicle undercoating and body lining, limited finishing workstations, and hand lay-up and spray fabrication of glass fiber-reinforced plastics. Included are rules covering the construction of spray rooms, spray booths, and mixing rooms, along with their electrical, ventilation, fire protection systems. Also included are rules for drying and curing processes, operations, and maintenance. Table of Contents

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