NFPA 91, Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Particulate Solids 2015

Help improve safety and maintain compliance for potentially hazardous exhaust systems with NFPA 91, Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Particulate Solids.

For more than a century, NFPA codes and standards have addressed the fire and explosion hazards associated with blower and exhaust systems. NFPA 91 provides comprehensive requirements for the design, construction, installation, testing, operation, and maintenance of exhaust systems handling potentially hazardous vapors, gases, mists, and particulate solids.

This essential standard helps organizations reduce fire and explosion risks in industrial and commercial environments where combustible or hazardous materials may be present within air conveying systems.

NFPA 91 also incorporates important provisions from NFPA 1, Fire Code, NFPA 30, Flammable and Combustible Liquids Code, and other NFPA standards related to specific industries and operations.

Who Uses NFPA 91?

NFPA 91 is an important resource for professionals responsible for industrial ventilation and fire safety, including:

• Design engineers
• Fire protection engineers
• Safety and health professionals
• Industrial hygienists
• Mechanical system designers
• Facility managers
• Fire and building officials
• Authorities having jurisdiction (AHJs)

These professionals rely on NFPA 91 to help identify ignition hazards and improve the safe handling of combustible or hazardous materials conveyed through duct and exhaust systems.

Highlights

NFPA 91 provides comprehensive requirements addressing:

• Exhaust system design and installation
• Fire and explosion hazard mitigation
• Air conveying systems for vapors, gases, mists, and particulate solids
• System testing, operation, and maintenance
• Protection of blower and duct systems
• Safety considerations for hazardous industrial operations
• Integration with related NFPA fire and safety standards

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