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.
NFPA 33, 2011 Edition: Archived Revision Information
Report on Proposals (ROP)
Report on Proposals (ROP)
Proposals can be submitted for text to be amended or included in NFPA Codes and Standards. Following the Call for Proposals period, the responsible Technical Committee or Panel holds a meeting to consider and act on all submitted proposals. The committee or panel may also develop its own proposals. A document known as the Report on Proposals (ROP) is prepared containing all the Public Proposals, Technical Committees' action on each Proposal, as well as all Committee-generated proposals. The ROP for the document in question is submitted for the approval of the responsible TC or Panel by a formal written ballot. If the ROP does not receive approval via written ballot in accordance with NFPA rules, the Report is returned to the committee for further consideration and is not published. If the necessary approval is received, the ROP is published in a compilation of Reports on Proposals issued by NFPA twice yearly for public review and comment, and the process continues to the next step. The ROP is published and widely distributed and anyone may download or request a copy.
Report on Comments (ROC)
Report on Comments (ROC)
Once the ROP becomes available, there is a 60-day comment period during which time anyone may submit a public comment on the proposed changes documented in the ROP. The committee or panel reconvenes at the end of the comment period and acts on all public comments. This committee or panel may also develop its own comments. As before, approval obtained via written ballot in accordance with NFPA's Regulations is required on all committee and panel actions. All of this information is compiled into a second Report, called the Report on Comments (ROC), which like the ROP, is published and made available for public review for a seven-week period.
Report on Comments (ROC) (PDF, 626 KB)
Motions Committee Report (NITMAM)
Motions Committee Report (NITMAM)
Proposed NFPA documents will be presented for action at the applicable Annual (June) Association Technical Meeting only when proper Amending Motions (Notice of Intent to Make a Motion - NITMAM) have been certified by the Motions Committee of the Standards Council as a proper amending motion. Documents that receive no motions will not be presented at the meeting and instead will be forwarded directly to the NFPA Standards Council for action on issuance. More about the codes and standards making process including NITMAM.
No NITMAMs
Association Technical Meeting
Consent document not presented at Association Technical Meeting. Document issuance: 6/1/2010.
Archived revision information
NFPA 33, 2011 Edition: Archived Revision Information
View archived proposals, comments and other records related to the development of this edition.
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Formal Interpretations (FIs)
Formal Interpretations (FIs)
Formal Interpretations (FIs) provide formal explanations of the meaning or intent of any specific provision or provisions of any document in accordance with Section 6 of the Regulations Governing Committee Projects.

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Formal Interpretations (PDF, 99 KB)
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