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NFPA
NFPA 497A : 1992

NFPA 497A : 1992

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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CLASSIFICATION OF CLASS I HAZARDOUS (CLASSIFIED) LOCATIONS FOR ELECTRICAL INSTALLATIONS IN CHEMICAL PROCESS AREAS

Superseded date

01-09-1997

Superseded by

NFPA 497 : 2017
NFPA 497 : 1997

Published date

12-01-2013

Publisher

National Fire Protection Association

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Chapter 1 General
1.1 Scope
1.2 Purpose
1.3 National Electrical Code criteria
Chapter 2 Basic considerations
2.1 National Electrical Code criteria
2.2 Conditions necessary for ignition
2.3 Behavior of gases, vapors, and liquids
2.4 Division 1 classified locations
2.5 Division 2 classified locations
2.6 Nonclassified locations
2.7 Extent of classified location
Chapter 3 Determining the degree and extent of
            hazardous (classified) locations
3.1 Diagrams and recommendations
3.2 Bases for recommendations
3.3 Procedure for classifying locations
3.4 Index of classification diagrams
Chapter 4 Referenced publications
Appendix A Referenced publications
Index

Recommends steps to determine the location, type, and scope of hazards presented by electrical installations in operations where flammable or combustible liquids are processed or handled. Coverage includes nonclassified locations, extent of classified location, procedure for classifying locations, conditions necessary for ignition, and index of classification diagrams. Also gives National Electrical Code Criteria.

DocumentType
Standard
PublisherName
National Fire Protection Association
Status
Superseded
SupersededBy

ASTM E 1248 : 1990 : R1997 Standard Practice for Shredder Explosion Protection
API 500B : 88 ERRATA RECOMMENDED PRACTICE FOR CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS AT DRILLING RIGS & PRODUCTION FACILITIES ON LAND & ON MARINE FIXED & MOBILE PLATFORMS
NFPA 49 : 1994 HAZARDOUS CHEMICALS DATA
ISA RP60.4 : 1990 DOCUMENTATION FOR CONTROL CENTERS
API 554-2 : 2008 : R2016 PROCESS CONTROL SYSTEMS - PROCESS CONTROL SYSTEM DESIGN
ASTM E 1248 : 1990 : R2017 Standard Practice for Shredder Explosion Protection
API 554-2 : 2008 PROCESS CONTROL SYSTEMS - PROCESS CONTROL SYSTEM DESIGN
ASTM E 1248 : 1990 : R2004 Standard Practice for Shredder Explosion Protection
ASTM E 1248 : 1990 : R2009 Standard Practice for Shredder Explosion Protection

NFPA 50A : 1999 GASEOUS HYDROGEN SYSTEMS AT CONSUMER SITES
NFPA 50B : 1999 LIQUEFIED HYDROGEN SYSTEMS AT CONSUMER SITES
NFPA 58 : 2017 LIQUEFIED PETROLEUM GAS CODE
NFPA 34 : 2015 DIPPING, COATING, AND PRINTING PROCESSES USING FLAMMABLE OR COMBUSTIBLE LIQUIDS
NFPA 36 : 2017 SOLVENT EXTRACTION PLANTS
NFPA 33 : 2016 SPRAY APPLICATION USING FLAMMABLE OR COMBUSTIBLE MATERIALS
NFPA 35 : 2016 MANUFACTURE OF ORGANIC COATINGS
API 500A : 4ED 82(R1987) CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS IN PETROLEUM REFINERIES
NFPA 45 : 2015 FIRE PROTECTION FOR LABORATORIES USING CHEMICALS
NFPA 70 : 2017 NATIONAL ELECTRICAL CODE
NFPA 59A : 2016 PRODUCTION, STORAGE, AND HANDLING OF LIQUEFIED NATURAL GAS (LNG)
NFPA 30 : 2018 FLAMMABLE AND COMBUSTIBLE LIQUIDS CODE

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