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NFPA 497: Recommended Practice for the Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas

Current Edition: 2012    Next Edition: 2016

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  The next edition of this standard is now open for Public Input (formerly proposals).

Revision cycle information

Revision Cycle:

Fall 2015

Revised Edition Date:

2016

First Draft (previously Report on Proposals (ROP))

Public Input Closing Date for Online Submission:  1/3/2014 Submit Public Input online 
Public Input Closing Date for Paper^† Submittal:   11/29/2013 Public Input form (word)

^†Paper Submittals are considered any submission other than the online submission system.

First Draft Report Posting Date:

9/5/2014

Second Draft (previously Report on Comments (ROC))

Public Comment Closing Date for Online Submission:  11/14/2014 
Public Comment Closing Date for Paper^† Submittal:  10/10/2014

^†Paper Submittals are considered any submission other than the online submission system.

Second Draft Report Posting Date:

7/17/2015

Notice of Intent to Make a Motion (NITMAM)

NITMAM Closing Date:

8/21/2015

NITMAM Posting Date:

10/16/2015