NFPA 497-2017
Recommended Practice for the Classification of Flammable Liquids@ Gases@ or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas (Effective Date: 06/02/2016)

Standard No.

NFPA 497-2017

Release Date

2017

Published By

American National Standards Institute （ANSI)

Status

Be replaced

Replace By

NFPA 497-2021

Latest

NFPA 497-2021

Replace

NFPA 497-2012

NFPA 497-2017 history

• 2021 NFPA 497-2021 Recommended Practice for the Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas (Effective Date: 04/04/2020)
• 2017 NFPA 497-2017 Recommended Practice for the Classification of Flammable Liquids@ Gases@ or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas (Effective Date: 06/02/2016)
• 0000 NFPA 497-2012
• 2008 NFPA 497-2008 Recommended Practice for the Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas Effective Date: 12/31/2007
• 2007 NFPA 497-2007 Recommended Practice for the Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas 2008 Edition