NFPA (Fire) 497

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Product Details

Published:
04/23/2023
ISBN(s):
9781455930623
ANSI:
ANSI Approved
Number of Pages:
79
Note:
This product is unavailable in Ukraine, Russia, Belarus

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NFPA (Fire) 497

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Codes and standards published by NFPA are displayed as read-only under license from NFPA solely for use within this system.  NFPA material may not be downloaded, printed, reproduced, or transferred.

Stay on top of safety in chemical process, storage, and handling areas with the updated NFPA 497, 2021 edition.

The release of flammable, combustible substances into an atmosphere with electrical systems or equipment can result in a potentially deadly and destructive incident. 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, delivers broad-based requirements for better safeguarding locations that handle these substances.

This vital safety document offers recommended practices that provide a basic understanding of parameters used to classify the extent of a hazardous location. You get criteria for assessing ignitability hazards in chemical process areas, as well as provisions for selecting the appropriate electrical systems and equipment for optimal safety.

NFPA 497 is a must-have guideline for:

  • Installers and maintainers of electrical equipment located in or near areas where flammable or combustible liquids or flammable gases or vapors are present
  • Equipment manufacturers providing equipment suitable for use in applicable electrically classified areas
  • Design engineers, consultants, loss prevention or safety engineers, insurance professionals, enforcing officials, and owners/operators of industrial facilities

The revised NFPA 497 is updated to reflect current industry knowledge and remain consistent with related codes and standards.

The 2021 edition of these recommended practices work in conjunction with NFPA 70, National Electrical Code® (NEC®), to factor ignitability hazards and relevant electrical systems and components.

Additional notable changes for 2021 include:

  • A revised Table 4.4.2 to update chemical and physical property data based on the Design Institute for Physical Properties (DIPPR) database
  • Updated Table 4.4.3 to correlate with Table 4.4.2

Be prepared to meet minimum safety requirements for areas using ignitible gases and liquids.

Make sure you have the latest information for helping to protect lives and property in industrial facilities by placing your order for 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.

Product Details

Published:
04/04/2020
Number of Pages:
76

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NFPA (Fire) 497

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Use NFPA 497 hand-in-hand with the new NEC® to determine ignitability hazards and select electrical systems and equipment for safe use in Class I hazardous (classified) locations.

In places where flammable gases or vapors, flammable liquids, or combustible liquids are processed or handled, their release into the atmosphere could result in their ignition by electrical systems or equipment. Work with today’s best practices to address potentially deadly and destructive hazards with the 2017 edition of NFPA 497: Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas.

This important Recommended Practice also provides information on specific flammable gases and vapors, flammable liquids, and combustible liquids whose relevant combustion properties have been sufficiently identified to allow their classification into the groups established by NFPA 70®: National Electrical Code® for proper selection of electrical equipment in hazardous locations.

NFPA 497 keeps pace with new knowledge. Updated references and definitions extracted from other NFPA® codes include:

  • The 2017 edition of the National Electrical Code
  • The 2016 edition of NFPA 59A: Standard for the Production, Storage, and Handling of Liquefied Natural Gas (LNG)
  • The 2015 edition of NFPA 30: Flammable and Combustible Liquids Code
      • Other changes and edits improve usability and provide consistency with related codes and standards.

      NFPA 497 is an essential on-the-job tool for installers and maintainers of industrial equipment using electrical power that is to be located in or near areas where flammable or combustible liquids, or flammable gases or vapors are stored, handled, or used; equipment manufacturers providing equipment suitable for use in such electrically classified areas; design engineers/consultants; loss prevention or safety engineers; insurance professionals; enforcing officials; and owners/operators of industrial facilities.

      Product Details

      Published:
      06/02/2016
      ISBN(s):
      9781455914074
      Number of Pages:
      77

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NFPA (Fire) 497

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Use the latest criteria in the 2012 NFPA 497 to determine ignitability hazards so you can properly select electrical systems and equipment for safe use in Class I hazardous (classified) locations.

NFPA 497: Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas applies to locations where flammable gases or vapors, flammable liquids, or combustible liquids are processed or handled and where their release into the atmosphere could result in their ignition by electrical systems or equipment. It also provides information on specific flammable gases and vapors, flammable liquids and combustible liquids whose relevant combustion properties have been sufficiently identified to allow their classification into the groups established by NFPA 70®: National Electrical Code® for proper selection of electrical equipment in hazardous locations.

Update your knowledge to keep pace with major revisions in the 2012 edition, including:

  • Approved amendments to physical and chemical property data for materials included in the document
  • Added definition for unclassified locations
  • Added guidance on the use of portable electronic products, such as watches, cell phones, indicating where their use is permitted in Division 2 locations
  • Revised and expanded Annex B
  • Updated reference standards and extracted text to the most current editions

Various edits and formatting changes were also made to improve usability and consistency with other documents. This document is an essential on-the-job tool for installers and maintainers of industrial equipment using electrical power that is to be located in or near areas where flammable or combustible liquids, or flammable gases or vapors are stored, handled or used; equipment manufacturers providing equipment suitable for use in such electrically classified areas; design engineers/consultants; loss prevention or safety engineers; insurance; enforcing officials; owner/operator of industrial facilities.

Product Details

Published:
01/02/2012
ISBN(s):
9781455902972
Number of Pages:
70

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NFPA (Fire) 497

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Trust the 2008 NFPA 497 to help you perform accurate hazardous (classified) area classification in Class I hazardous (classified) locations.

NFPA 497: Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas has a close relationship to the electrical installation requirements for hazardous (classified) locations contained in NFPA 70™: National Electrical Code®. To ensure correlation with revisions made to the 2008 NEC®, the 2008 NFPA 497 now includes:

  • Changes to the scope to specify that explosives, pyrotechnics, and blasting agents have unique hazards that are not addressed by the recommendations of the document
  • Recognition of areas as being unclassified where the gas or vapor concentration is insufficient to reach 25% of the lower flammable limit (LFL)
  • Additions and revisions to Table 4.4.2 on physical properties of selected chemicals in order to provide information on commonly used materials not previously covered and to resolve differences that existed between this table and similar information contained in other documents
  • Revision to the Annex B example on determining the maximum experimental safe gap and NEC group classification for mixtures

Make sure you have the up-to-date knowledge you need to properly select and install electrical equipment so it will not be an ignition source in environments where flammable or combustible liquids, gases, or vapors are processed or handled.

Product Details

Published:
03/14/2008
Number of Pages:
63

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