Help protect people in facilities where flammable or combustible liquids are sprayed with the 2021 edition of NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials.

Help engineers, employees, and individuals stay safe by addressing fire, explosion, and electrical hazards in industries that spray flammable and combustible liquids, including waterborne materials that contain flammable or combustible residues. In the new edition of NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, requirements for sprinkler systems and spray booths were expanded. New language was added to the fire safety standard to explain why only clear, cellulose-based bags should be used to cover sprinklers. The technical standard now specifies that the recirculation of heated air does not apply to spray booths used for curing and clarifies that automatic fire protection is not necessary in small spray booths.

Important updates in this fire safety standard improve consistency and clarify requirements, making this version of NFPA 33 vital for engineers, designers, contractors, and installers.

• The Origin and Development was revised to provide users with a more concise summary of the standard's historical changes.
• New terms were added to Chapter 3 for liquid classifications.
• To better align with applicable sections in NFPA 70^®, National Electrical Code^® (NEC^®), additional direction was added to the Chapter 6 annex material.
• To provide ease and clarity for the user, Chapter 9, Heaters, was reorganized for a clearer and more cohesive reading experience.
• Extracted material from other NFPA^® documents was updated to provide the most current safety requirements.
• Language was updated to align with the current edition of NFPA 30, Flammable and Combustible Liquids Code.

NFPA 33 has essential rules for the construction of spray rooms, spray booths, and spray areas, including their electrical installations, ventilation, and fire protection systems. The standard also contains requirements for safe spray application of coatings, including handling of flammable liquids, operations, and maintenance.

Enhance fire and electrical safety in your workplace by learning about the dangers related to the spray application of flammable materials or combustible materials. Follow the industry’s best practices with the newest edition of NFPA 33.