Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Particulate Solids
What is NFPA 91?
This standard provides technical requirements for exhaust systems that will protect lives and property from fires and explosions and minimize damage in the event that such fires and explosions occur.
Official document scope
What does NFPA 91 address?
Provisions cover design, construction, installation, operation, testing, and maintenance of exhaust systems for air conveying of vapors, gases, mists, and noncombustible particulate solids except as modified or amplified by other applicable NFPA standards. Specific topics include corrosive materials, air-moving devices, air separation devices, ignition sources, and fire protection.