NFPA 22:2023

Chapter 1 Administration
1.1 Scope.
1.2 Purpose.
1.3 Retroactivity.
1.4 Equivalency.
1.5 Types of Tanks.
1.6 Units.
1.7 New Technology.
Chapter 2 Referenced Publications
2.1 General.
2.2 NFPA Publications.
2.3 Other Publications.
2.4 References for Extracts in Mandatory Sections.
(Reserved)
Chapter 3 Denitions
3.1 General.
3.2 NFPA Ofƒcial Deƒnitions.
3.3 General Deƒnitions.
Chapter 4 General Information
4.1 Capacity and Elevation.
4.2 Water Sources.
4.3 Location of Tanks.
4.4 Tank Materials.
4.5 Workmanship.
4.6 Plans.
4.7 Tank Contractor Responsibility.
4.8 Attachments to Tank Structures.
4.9 Lightning Protection.
4.10 Strength.
4.11 National Standards.
4.12 Loads.
4.13 Welding.
4.14 Roofs.
4.15 Roof Vent.
4.16 Test Reports.
Chapter 5 Welded-Carbon Steel and Composite
Concrete and Carbon Steel Gravity Tanks
and Suction Tanks
5.1 General.
5.2 Materials.
5.3 Preventing Ice Damage.
5.4 Corrosion Protection for Bottom Plates on Soil
or Concrete.
5.5 Painting Inaccessible Areas.
5.6 Painting and Corrosion Protection.
5.7 Painting Application.
5.8 Heavy Metals.
Chapter 6 Factory-Coated, Bolted Carbon Steel Tanks
6.1 General.
6.2 Materials, Fabrication, and Installation.
6.3 Corrosion Protection.
6.4 Structural Shapes.
Chapter 7 Pressure Tanks
7.1 General.
7.2 Pipe Connections and Fittings.
Chapter 8 Wood Gravity Tanks and Suction Tanks
8.1 General.
8.2 Material.
8.3 Unit Stresses.
8.4 Details of Design.
8.5 Workmanship.
8.6 Accessories.
Chapter 9 Embankment-Supported Coated Fabric
Suction Tanks
9.1 General.
9.2 Standard Capacities.
9.3 Materials.
9.4 Embankment Preparation and Tank Installation
Procedure.
9.5 Tank Sump and Support for Bottom Fittings.
9.6 Pipe Connections and Fittings.
Chapter 10 Concrete Gravity Tanks and Suction Tanks .. 22– 22
10.1 General.
10.2 Prestressed Tanks.
10.3 Standard Capacities.
10.4 Earthquake Load.
10.5 Wall Treatments.
Chapter 11 Fiberglass-Reinforced Plastic Tanks
11.1 General.
11.2 Application.
11.3 Tank Speciƒcation.
11.4 Monolithic Tanks.
11.5 Protection of Buried Tanks.
11.6 Protection of Aboveground Tanks.
11.7 Tank Connections.
Chapter 12 Tank and Tower Foundations in the
Ground
12.1 Concrete Speciƒcations.
12.2 Suction Tank Foundations.
12.3 Foundation Piers for Elevated Tanks.
12.4 Anchorage.
12.5 Grouting.
12.6 Soil-Bearing Pressures.
Chapter 13 Steel Tank Towers
13.1 General.
13.2 Materials.
13.3 Loads.
13.4 Unit Stresses.
13.5 Details of Design.
13.6 Workmanship.
13.7 Accessories.
Chapter 14 Pipe Connections and Fittings
14.1 General Information.
14.2 Discharge Pipe.
14.3 Expansion Joint.
14.4 Filling.
14.5 Break Tanks.
14.6 Overow.
14.7 Clean-Out and Drain.
14.8 Connections for Other Than Fire Protection.
14.9 Sensors.
Chapter 15 Valve Enclosures and Frost Protection
15.1 Valve Pit or House and Heater House.
15.2 Frostproof Casing.
Chapter 16 Tank Heating
16.1 General.
16.2 Heating Requirements.
16.3 Heating Systems.
16.4 Tank Insulation.
CONTENTS 22-5
2023 Edition
16.5 Heating for Embankment-Supported Coated
Fabric Suction Tanks.
Chapter 17 Acceptance Test Requirements
17.1 Inspection of Completed Equipment.
17.2 Testing.
17.3 Welded Steel Tanks.
17.4 Bolted Steel Tanks.
17.5 Pressure Tanks.
17.6 Embankment-Supported Coated Fabric Tanks.
17.7 Concrete Tanks.
17.8 Wood Tanks.
17.9 Fiberglass-Reinforced Plastic Tanks —
Hydrostatic Test.
17.10 Disposal of Test Water.
17.11 Anti-Vortex Plate Inspection.
Chapter 18 Inspection, Testing, and Maintenance of
Water Tanks
18.1 General.
Annex A Explanatory Material
Annex B Typical Installations
Annex C Informational References
Index

This standard provides the minimum requirements for the design, construction, installation, and maintenance of tanks and accessory equipment that supply water for private fire protection, including the following: (1) Gravity tanks, suction tanks, pressure tanks, and embankment-supported coated fabric suction tanks (2) Towers (3) Foundations (4) Pipe connections and fittings (5) Valve enclosures (6) Tank filling (7) Protection against freezing.