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NFPA 33 2021

NFPA 33 2021

$80.71

NFPA 33: Standard for Spray Application Using Flammable or Combustible Materials

Published By Publication Date Number of Pages
NFPA 2021 69
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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.

PDF Catalog

PDF Pages PDF Title
2 Important Notices and Disclaimers
3 Additional Important Notices and Disclaimers
10 Chapter 1 Administration
1.1 Scope.
1.2 Purpose.
1.3 Application.
1.4 Retroactivity.
11 1.5 Equivalency.
1.6 Units and Formulas.
1.7 Enforcement. (Reserved)
Chapter 2 Referenced Publications
2.1 General.
2.2 NFPA Publications.
2.3 Other Publications.
12 2.4 References for Extracts in Mandatory Sections.
Chapter 3 Definitions
3.1 General.
3.2 NFPA Official Definitions.
3.3 General Definitions.
14 Chapter 4 General Requirements
4.1 Location of Spray Application Operations.
4.2 Separation.
4.3 Basements.
4.4 Fueled Vehicles.
4.5 Noncombustible Material.
4.6 Limited-Combustible Material.
4.7 Classification of LiquidsScheme.
15 4.8 Determination of Flash Point (FP).
Chapter 5 Construction and Design of Spray Areas, Spray Rooms, and Spray Booths
5.1 Spray Areas.
5.2 Spray Rooms.
5.3 Spray Booths.
16 5.4 Conveyor Openings.
5.5 Separation from Other Operations.
5.6 Illumination and Observation Panels.
5.7 Ventilation.
Chapter 6 Electrical and Other Sources of Ignition
6.1 Scope.
6.2 General.
17 6.3 Electrical Area Classification.
18 6.4 Electrical Devices in Spray Areas.
6.5 Electrical Devices in Areas Adjacent to or Connected to Spray Areas.
19 6.6 Illumination.
20 6.7 Static Electricity.
6.8 Flexible Power Cords.
21 6.9 Portable Electric Luminaires.
6.10 Movement of Powered Vehicles.
Chapter 7 Ventilation
7.1 General.
7.2 Performance Requirements.
7.3 Make-Up Air.
7.4 Routing of Exhaust Ducts.
22 7.5 Recirculation of Exhaust.
7.6 Heating of Recirculated Air.
7.7 Manifolding of Exhaust Ducts.
7.8 Materials of Construction.
7.9 Support of Exhaust Ducts.
7.10 Exhaust Duct Access Openings.
7.11 Exhaust Fans and Drives.
7.12 Drying Areas.
Chapter 8 Storage, Handling, and Distribution of Flammable and Combustible Liquids
8.1 General.
8.2 Storage in Process Areas.
23 8.3 MixingHandling and Use.
8.4 Distribution Systems — Piping.
24 8.5 Distribution Systems — General.
25 Chapter 9 Protection
9.1 General.
9.2 Ventilation Systems.
9.3 Coating Material Delivery Systems.
9.4 Conveyors.
9.5 Protection Systems.
26 9.6 Specific Process Protection.
27 9.7 Protection for Electrostatic Precipitator Scrubber.
9.8 Protection for High-Capacity Dry Paint Arrestor.
Chapter 10 Operations and Maintenance
10.1 General.
10.2 Inspection, Testing, and Maintenance.
10.3 Combustible Deposits.
28 10.4 High-Pressure Hose Lines.
10.5 Maintenance Procedures.
10.6 Waste Containers.
10.7 Clothing.
10.8 Cleaning Operations.
10.9 Solvent Distillation Units (Solvent Recyclers).
10.10 Spontaneous Ignition Hazards.
29 10.11 Chlorinated Solvents.
10.12 Smoking.
10.13 Hot Work.
Chapter 11 Automated Electrostatic Spray Equipment
11.1 Scope.
11.2 General.
11.3 Automated Electrostatic Systems.
11.4 Incendive Equipment.
30 11.5 Listing and Approval of Equipment.
Chapter 12 Handheld Electrostatic Spray Equipment
12.1 Scope.
12.2 General.
12.3 Handheld Apparatus.
12.4 Electrical Components.
12.5 Grounding.
Chapter 13 Drying, Curing, and Fusion Processes
13.1 General.
13.2 Spray Booths and Spray Rooms Used for Ambient Air Drying.
13.3 Spray Booths and Spray Rooms Used for Drying at Elevated Temperatures.
31 13.4 Liquefied-Petroleum-Gas, Compressed-Natural-Gas, or Hydrogen-Fueled Vehicles.
13.5 Radiant Drying Apparatus.
13.6 Flash-Off Areas.
32 13.7 Spray Booths or Spray Rooms Adjacent to or Connected to Rooms or Equipment Used for Drying, Curing, or Fusing.
13.8 Ventilation.
13.9 Warning Signs.
Chapter 14 Miscellaneous Spray Operations
14.1 Vehicle Undercoating and Body Lining.
14.2 Preparation Workstations.
14.3 Limited Finishing Workstations.
33 Chapter 15 Powder Coating
15.1 Scope.
15.2 General.
15.3 Applicability.
15.4 Location.
15.5 Protection.
34 15.6 Enclosures.
15.7 Electrical and Other Sources of Ignition.
35 15.8 Ventilation, Dust Collection, and Explosion Protection.
15.9 Drying, Curing, and Fusing Equipment.
15.10 Operation and Maintenance.
15.11 Automated Electrostatic Powder Spraying Equipment.
15.12 Handheld Electrostatic Powder Spraying Equipment.
15.13 Electrostatic Fluid Beds.
36 15.14 Hot Flocking.
15.15 Fluid Bed Coating.
15.16 Powder Coating Delivery and Circulation.
15.17 Powder Unloading, Bag Dumping Stations, and Pneumatic Conveying Systems.
15.18 Screening or Sieving Operations.
15.19 Storage and Handling.
Chapter 16 Organic Peroxides and Plural Component Coatings
16.1 Scope.
16.2 General.
16.3 Prevention of Contamination.
16.4 Storage of Organic Peroxides.
37 16.5 Handling of Organic Peroxides.
16.6 Mixing of Organic Peroxides with Promoters.
16.7 Smoking.
16.8 Trained Personnel.
16.9 Material Safety Data Sheets.
Chapter 17 Styrene Cross-Linked Composites Manufacturing (Glass Fiber–Reinforced Plastics)
17.1 Scope.
17.2 Resin Application Equipment.
17.3 Fire Protection.
17.4 Resin Storage.
17.5 Electrical and Other Hazards.
17.6 Ventilation.
17.7 Use and Handling.
Chapter 18 Spray Application Operations in Membrane Enclosures
18.1 Scope.
18.2 Limitations.
38 18.3 Membrane Material.
18.4 Protection.
18.5 Operations and Maintenance within Membrane EnclosuresPersonnel Inside the Enclosure.
18.6 Electrical and Other Sources of Ignition.
39 18.7 Ventilation.
40 18.8 Recordkeeping.
18.9 Storage and Handling of Ignitible (Flammable and Combustible) Liquids.
18.10 Facilities Compliance Permitting.
41 Chapter 19 Training
19.1 General.
Annex A Explanatory Material
57 Annex B Determining Lower Flammable Limits
58 Annex C Determining Ventilation Airflow for Powder Application Systems
59 Annex D Fire Record
60 Annex E Informational References

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NFPA 33 2021
$80.71