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NFPA 91 2020

NFPA 91 2020

$71.25

NFPA 91: Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Noncombustible Particulate Solids

Published By Publication Date Number of Pages
NFPA 2020 30
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Help ensure compliance with critical requirements for safeguarding potentially dangerous exhaust systems from fires and explosions. For well over a century, NFPA® codes and standards have been addressing the inherent dangers that blower and exhaust systems can present to public safety. NFPA 91, Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Particulate Solids, 2020 edition, represents the most complete criteria for designing, constructing, installing, testing, operating, and maintaining these systems. This vital safety document assists in protecting lives and property and minimizing loss from fires and explosions in exhaust systems where vapors, gases, mists, and particulate solids are present in the airflow. The standard incorporates provisions on the application of exhaust systems to specific industries or operations from NFPA 1, Fire Code, NFPA 30, Flammable and Combustible Liquids Code, and many other codes and standards. Update to the 2020 edition to access the most current information and performance criteria. The revised NFPA 91 provides the latest knowledge on exhaust systems for air conveying vapors, gases, mists, and particulate solids relating to fire and explosion prevention. Content covers everything from requirements for corrosive materials and air-moving devices to air-material separators, ignition sources, and fire protection systems. Changes to the 2021 edition include added requirements for nonconductive system components and revision to the concentration threshold for flammable or combustible materials requiring spark-resistant fans and blowers. NFPA 91 is an essential resource for process industries with ignition risks of materials pneumatically conveyed through duct systems.

PDF Catalog

PDF Pages PDF Title
2 Important Notices and Disclaimers
3 Additional Notices and Disclaimers
9 Chapter 1 Administration
1.1 Scope.
1.2 Purpose.
1.3 Retroactivity.
1.4 Equivalency.
1.5 Units of Measurement.
Chapter 2 Referenced Publications
2.1 General.
2.2 NFPA Publications.
10 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.
11 Chapter 4 Design and Construction
4.1 Terminology.
4.2 General Requirements.
12 4.3 Duct Material and Construction.
13 4.4 Access.
4.5 Design Requirements.
14 4.6 Hangers and Supports.
4.7 Duct Installation.
16 Chapter 5 Corrosive Materials
5.1 General.
Chapter 6 Air-Moving Devices
6.1 General.
6.2 Flammable or Combustible Materials.
6.3 Clearance.
6.4 Alignment.
6.5 Maintenance and Inspection.
6.6 Location.
6.7 Flexible Connections.
Chapter 7 Air–Material Separators (Air Separation Devices)
7.1 General Requirements.
17 7.2 Separators for Noncombustible Particulates.
7.3 Separators for Flammable Gases, Vapors, and Mists.
Chapter 8 Ignition Sources
8.1 Electrical Equipment.
8.2 Static Electricity.
8.3 Manifolds.
8.4 Open Flames and Sparks.
8.5 Removal of Ferrous Materials.
8.6 Belt Drives.
8.7 Bearings.
8.8 Equipment.
Chapter 9 Fire Protection
9.1 General.
18 9.2 Drainage.
9.3 Testing and Inspection.
Chapter 10 Testing and Maintenance
10.1 Retroactivity.
10.2 General.
10.3 System Test.
10.4 System Inspection.
10.5 Cleanliness.
10.6 Maintenance Program.
10.7 Maintenance Log.
Annex A Explanatory Material
23 Annex B Informational References

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NFPA 91 2020
$71.25