NFPA 45:2024

Chapter 1 Administration
1.1 Scope.
1.2 Purpose.
1.3 Application.
1.4 Retroactivity.
1.5 Equivalency.
Chapter 2 Referenced Publications
2.1 General.
2.2 NFPA Publications.
2.3 Other Publications.
2.4 References for Extracts in Mandatory Sections.
Chapter 3 Definitions
3.1 General.
3.2 NFPA Official Definitions.
3.3 General Definitions.
Chapter 4 Laboratory Unit Hazard Classification
4.1 General.
4.2 Laboratory Unit Fire Hazard Classification.
Chapter 5 Laboratory Unit Design and Construction
5.1 Laboratory Unit Enclosure.
5.2 Requirements for Life Safety.
5.3 Means of Access to an Exit.
5.4 Furniture, Casework, and Equipment.
5.5 Electrical Installation.
Chapter 6 Fire Protection
6.1 Automatic Fire Extinguishing Systems.
6.2 Standpipe and Hose Systems.
6.3 Portable Fire Extinguishers.
6.4 Fire Alarm Systems.
6.5 Fire Prevention.
6.6 Flame-Resistant Clothing.
Chapter 7 Laboratory Ventilating Systems and Hood Requirements
7.1 General.
7.2 Basic Requirements.
7.3 Supply Systems.
7.4 Exhaust Air Discharge.
7.5 Duct Construction for Hoods and Local Exhaust Systems.
7.6 Duct Velocities.
7.7 Exhausters (Fans), Controls, Velocities, and Discharge.
7.8 Chemical Fume Hood Requirements.
7.9 Chemical Fume Hood Location.
7.10 Chemical Fume Hood Fire Protection.
7.11 Inert Atmosphere Glove Boxes.
7.12 Perchloric Acid Hoods.
7.13 Identification of Chemical Fume Hood Systems.
7.14 Inspection, Testing, and Maintenance.
7.15 Ductless Fume Hoods.
7.16 Procedures for Use of Ductless Fume Hoods.
Chapter 8 Chemical Storage, Handling, and Waste Disposal
8.1 General.
8.2 Ordering Procedures.
8.3 Handling and Storage.
8.4 Waste Handling and Disposal.
Chapter 9 Ignitible (Flammable and Combustible) Liquids
9.1 Quantity Limitations.
9.2 Supply Piping.
9.3 Liquid Dispensing.
9.4 Pressurized Liquid Dispensing Containers (PLDC).
9.5 Equipment.
Chapter 10 Compressed and Liquefied Gases
10.1 Compressed and Liquefied Gases in Cylinders.
10.2 Storage and Piping Systems.
10.3 Outdoor Installation of Compressed Gas Cylinders for Servicing Laboratory Work Areas (Located Outside of Laboratory Work Areas).
10.4 Cryogenic Fluids.
Chapter 11 Laboratory Operations and Apparatus
11.1 General.
11.2 Operations.
11.3 Apparatus.
11.4 Ductless Fume Hood Operations.
Chapter 12 Educational and Instructional Laboratory Operations
12.1 General.
12.2 Instructor Responsibilities.
12.3 Chemical Storage and Handling.
12.4 Other Requirements.
Chapter 13 Hazard Identification
13.1 General.
13.2 Identification of Entrances.
13.3 Exhaust Systems.
13.4 Labeling of Containers.
13.5 Identification Systems.
Annex A Explanatory Material
Annex B Supplementary Definitions
Annex C Information on Explosion Hazards and Protection
Annex D Supplementary Information on the Concept of the Laboratory Unit
Annex E Flammability Characteristics of Common Compressed and Liquefied Gases
Annex F Safety Tips for Compressed Gas Users
Annex G Informational References

This standard shall apply to laboratory buildings, labo‐ ratory units, and laboratory work areas whether located above or below grade in which chemicals, as deƒned in NFPA 704 with one or more of the following hazard ratings are handled or stored: health — 2, 3, or 4; …ammability — 2, 3, or 4; or instability — 2, 3, or 4.