NFPA (Fire) 91 Historical

1173305

Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Noncombustible Particulate Solids, 2004 Edition

standard by National Fire Protection Association , 09/15/2004

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Full Description

Prevent exhaust systems from spreading fire and increasing the risk of explosion! 

NFPA 91 provides minimum requirements for the 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.

Changes to the 2004 edition include:

  • Expanded conditions under which flammable concentrations can exceed 25 percent of the lower flammable limit
  • Revised provisions for duct hanging and bracing design to account for both automatic sprinkler discharge as well as liquid cleaning solutions
  • A new provision allowing ductwork to be wrapped or encased to achieve the intended fire resistance
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Document History

  1. NFPA (Fire) 91


    Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Particulate Solids, 2020 Edition

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  2. NFPA (Fire) 91


    Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Noncombustible Particulate Solids, 2015 Edition

    • Historical Version

  3. NFPA (Fire) 91


    Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Noncombustible Particulate Solids, 2010 Edition

    • Historical Version

  4. NFPA (Fire) 91

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    Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Noncombustible Particulate Solids, 2004 Edition

    • Historical Version

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Product Details

Published:

09/15/2004

Number of Pages:

17

Note:

This product is restricted and cannot be purchased in these countries.