NFPA 497 : 2017
Superseded
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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 FLAMMABLE LIQUIDS, GASES, OR VAPORS AND OF HAZARDOUS (CLASSIFIED) LOCATIONS FOR ELECTRICAL INSTALLATIONS IN CHEMICAL PROCESS AREAS
Available format(s)
Hardcopy
Superseded date
16-08-2021
Superseded by
Language(s)
English
Published date
01-01-2017
Publisher
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Chapter 1 - Administration
Chapter 2 - Referenced Publications
Chapter 3 - Definitions
Chapter 4 - Classification of Combustible Materials
Chapter 5 - Classification of Class I (Combustible Material) Areas
Annex A - Explanatory Material
Annex B - Example of a Method for Determining
NEC Group Classification for Mixtures
Annex C - Informational References
Index
Gives 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 (NEC), for proper selection of electrical equipment in hazardous (classified) locations.
| DevelopmentNote |
Formerly NFPA 497A and part of NFPA 497M. (06/2001) 2012 version is also available in Spanish; See NFPA 497 SPANISH. (12/2014)
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| DocumentType |
Standard
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| Pages |
77
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| PublisherName |
National Fire Protection Association
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| Status |
Superseded
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| SupersededBy | |
| Supersedes |
| IEEE 303-2004 | IEEE Recommended Practice for Auxiliary Devices for Rotating Electrical Machines in Class I, Division 2 and Zone 2 Locations |
| BS ISO 16924 : 2016 | NATURAL GAS FUELLING STATIONS - LNG STATIONS FOR FUELLING VEHICLES |
| BS EN ISO 16852:2010 | Flame arresters. Performance requirements, test methods and limits for use |
| 13/30279579 DC : 0 | BS ISO 19372 - MICROTURBINES APPLICATIONS - SAFETY |
| ANSI/AIHA/ASSP Z9.9-2010 | PORTABLE VENTILATION SYSTEMS |
| IEEE 3004.8-2016 | IEEE Recommended Practice for Motor Protection in Industrial and Commercial Power Systems |
| ANSI FC 1 : 2012 | STATIONARY FUEL CELL POWER SYSTEMS |
| API 500A : 4ED 82(R1987) | CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS IN PETROLEUM REFINERIES |
| SAE J 2645 : 2018 | LIQUEFIED NATURAL GAS (LNG) VEHICLE METERING AND DISPENSING SYSTEMS - TRUCK AND BUS |
| SAE J 2851 : 2015 | RECOVERY EQUIPMENT FOR CONTAMINATED R-134A OR R-1234YF REFRIGERANT FROM MOBILE AUTOMOTIVE AIR CONDITIONING SYSTEMS |
| NFPA 318 : 2018 | PROTECTION OF SEMICONDUCTOR FABRICATION FACILITIES |
| NFPA 30 : 2018 | FLAMMABLE AND COMBUSTIBLE LIQUIDS CODE |
| NFPA 30A : 2018 | MOTOR FUEL DISPENSING FACILITIES AND REPAIR GARAGES |
| NFPA 505 : 2018 | FIRE SAFETY STANDARD FOR POWERED INDUSTRIAL TRUCKS INCLUDING TYPE DESIGNATIONS, AREAS OF USE, CONVERSIONS, MAINTENANCE, AND OPERATIONS |
| NFPA 51A : 2012 | ACETYLENE CYLINDER CHARGING PLANTS |
| NFPA 35 : 2016 | MANUFACTURE OF ORGANIC COATINGS |
| NFPA 87 : 2018 | FLUID HEATERS |
| NFPA 496 : 2017 | PURGED AND PRESSURIZED ENCLOSURES FOR ELECTRICAL EQUIPMENT |
| NFPA 850 : 2015 | FIRE PROTECTION FOR ELECTRIC GENERATING PLANTS AND HIGH VOLTAGE DIRECT CURRENT CONVERTER STATIONS |
| NFPA 59 : 2018 | UTILITY LP-GAS PLANT CODE |
| PIP ELCGL01 : 2013 | ELECTRICAL DESIGN CRITERIA |
| ISA TR12.24.01 : 1998 | RECOMMENDED PRACTICE FOR CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS CLASSIFIED AS CLASS 1, ZONE 0, ZONE 1, OR ZONE 2 |
| FM 3620 : 2018 | PURGED AND PRESSURIZED ELECTRICAL EQUIPMENT FOR HAZARDOUS (CLASSIFIED) LOCATIONS |
| 14/30284759 DC : 0 | BS EN ISO 16852 - FLAME ARRESTERS - PERFORMANCE REQUIREMENTS, TEST METHODS AND LIMITS FOR USE |
| CSA PLUS 2203 : 2001 | HAZARDOUS LOCATIONS - GUIDE FOR THE DESIGN, TESTING, CONSTRUCTION, AND INSTALLATION OF EQUIPMENT IN EXPLOSIVE ATMOSPHERES |
| DIN EN ISO 16852:2010-09 | FLAME ARRESTERS - PERFORMANCE REQUIREMENTS, TEST METHODS AND LIMITS FOR USE (ISO 16852:2016) |
| API 625 : 2010 | TANK SYSTEMS FOR REFRIGERATED LIQUEFIED GAS STORAGE |
| ISA 12.13.01 : 2003 | PERFORMANCE REQUIREMENTS FOR COMBUSTIBLE GAS DETECTORS |
| ISA TR12.13.03 : 2009 | GUIDE FOR COMBUSTIBLE GAS DETECTION AS A METHOD OF PROTECTION |
| NFPA 30B : 2015 | CODE FOR THE MANUFACTURE AND STORAGE OF AEROSOL PRODUCTS |
| NFPA 651 : 1998 | MACHINING AND FINISHING OF ALUMINUM AND THE PRODUCTION AND HANDLING ALUMINUM POWDERS |
| SAE J 2578 : 2014 | RECOMMENDED PRACTICE FOR GENERAL FUEL CELL VEHICLE SAFETY |
| NFPA 664 : 2017 | PREVENTION OF FIRES AND EXPLOSIONS IN WOOD PROCESSING AND WOODWORKING FACILITIES |
| C22.1-15 PACKAGE | Consists of C22.1-15, Canadian electrical code, part I (23rd edition), safety standard for electrical installations; C22.1HB-15, Canadian electrical code handbook - an explanation of rules of the Canadian electrical code, part I and the 2015 Electrical quick reference |
| BS EN ISO 16924:2018 | Natural gas fuelling stations. LNG stations for fuelling vehicles |
| API 500 RUSSIAN :1997 | RECOMMENDED PRACTICE FOR CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS AT PETROLEUM FACILITIES CLASSIFIED AS CLASS 1, DIVISION 1 AND DIVISION 2 |
| API 500 RUSSIAN : 1997 : R2002 | RECOMMENDED PRACTICE FOR CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS AT PETROLEUM FACILITIES CLASSIFIED AS CLASS 1, DIVISION 1 AND DIVISION 2 |
| NFPA 2 : 2016 | HYDROGEN TECHNOLOGIES CODE |
| NFPA 52 : 2016 | VEHICULAR NATURAL GAS FUEL SYSTEMS CODE |
| NFPA 820 : 2016 | FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIES |
| ISO 19859:2016 | Gas turbine applications Requirements for power generation |
| ANSI/CSA NGV 5.1-2016 (R2020) | Residential fueling appliances |
| NFPA 1 : 2021 | FIRE CODE |
| C22.1HB-18 | Canadian Electrical Code Handbook - An Explanation of the Rules of the Canadian Electrical Code, Part I |
| CSA NGV 5.1 : 2016 | RESIDENTIAL FUELING APPLIANCES |
| ISA 12.00.01 : 2002 | ELECTRICAL APPARATUS FOR USE IN CLASS 1, ZONE 0, 1 AND 2 HAZARDOUS (CLASSIFIED) LOCATIONS - GENERAL REQUIREMENTS |
| 13/30271407 DC : DRAFT DEC 2013 | BS ISO 16924 - NATURAL GAS FUELLING STATIONS - LNG STATIONS FOR FUELLING VEHICLES |
| API 500C : 2ED 84(R1990) | CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS AT PIPELINE TRANSPORTATION FACILITIES |
| NFPA 8506 : 1998 | HEAT RECOVERY STEAM GENERATOR SYSTEMS |
| ICC 2012 INTERNATIONAL PERFORM. CODE : 2012 | ICC PERFORMANCE CODE FOR BUILDINGS AND FACILITIES |
| UNE-EN ISO 16852:2017 | Flame arresters - Performance requirements, test methods and limits for use (ISO 16852:2016) |
| BS ISO 21789:2009 | Gas turbine applications — Safety |
| ANSI/CSA FC 1:2014 | FUEL CELL TECHNOLOGIES - PART 3-100: STATIONARY FUEL CELL POWER SYSTEMS - SAFETY |
| ISA RP12.24.01 : 1998 | RECOMMENDED PRACTICE FOR CLASSIFICATIONS OF LOCATIONS FOR ELECTRICAL INSTALLATIONS CLASSIFIED AS CLASS I ZONE 0, ZONE 1, OR ZONE 2 |
| API STD 541 : 2014 | FORM-WOUND SQUIRREL CAGE INDUCTION MOTORS - 375 KW (500 HORSEPOWER) AND LARGER |
| NFPA 69 : 2014 | EXPLOSION PREVENTION SYSTEMS |
| ISA 60079-29-2 : 2012 | EXPLOSIVE ATMOSPHERES - PART 29-2: GAS DETECTORS - SELECTION, INSTALLATION, USE AND MAINTENANCE OF DETECTORS FOR FLAMMABLE GASES AND OXYGEN |
| API 612 : 2014 | PETROLEUM, PETROCHEMICAL, AND NATURAL GAS INDUSTRIES - STEAM TURBINES - SPECIAL-PURPOSE APPLICATIONS |
| API 2610 : 2005 : R2010 | DESIGN, CONSTRUCTION, OPERATION, MAINTENANCE, AND INSPECTION OF TERMINAL AND TANK FACILITIES |
| ISO 19372:2015 | Microturbines applications — Safety |
| API 14F : 2008 : R2013 | DESIGN, INSTALLATION, AND MAINTENANCE OF ELECTRICAL SYSTEMS FOR FIXED AND FLOATING OFFSHORE PETROLEUM FACILITIES FOR UNCLASSIFIED AND CLASS 1, DIVISION 1 AND DIVISION 2 LOCATIONS |
| API 540 : 1999 : R2006 | ELECTRICAL INSTALLATIONS IN PETROLEUM PROCESSING PLANTS |
| NFPA 70 : 2017 | NATIONAL ELECTRICAL CODE |
| NFPA 55 : 2016 | COMPRESSED GASES AND CRYOGENIC FLUIDS CODE |
| ISO 21789:2009 | Gas turbine applications — Safety |
| IEEE 1635-2012 | IEEE/ASHRAE Guide for the Ventilation and Thermal Management of Batteries for Stationary Applications |
| NASA KSC E 165 : 2009 | ELECTRICAL GROUND SUPPORT EQUIPMENT FABRICATION, SPECIFICATION FOR |
| NASA KSC STD E 0002 : 2009 | HAZARDPROOFING OF ELECTRICALLY ENERGIZED EQUIPMENT, STANDARD FOR |
| ASHRAE GUIDELINE 21 : 2012 | VENTILATION AND THERMAL MANAGEMENT OF BATTERIES FOR STATIONARY APPLICATIONS |
| NASA STD 8719.24 : 2011 | NASA EXPENDABLE LAUNCH VEHICLE PAYLOAD SAFETY REQUIREMENTS |
| NASA KSC GP 864 VOL 2A : 2009 | ELECTRICAL GROUND SUPPORT EQUIPMENT CABLE HANDBOOK |
| API STD 612:2020 | Petroleum, Petrochemical, and Natural Gas Industries - Steam Turbines - Special-purpose Applications |
| CSA CE CODE SAFETY PACKAGE : 2012 | CE CODE SAFETY PACKAGE |
| CSA C22.4 PACKAGE : 2009 | CONSISTS OF C22.4 NO. 1-09, OBJECTIVE-BASED INDUSTRIAL ELECTRICAL CODE AND C22.4 NO. 2-09, OBJECTIVE-BASED INDUSTRIAL ELECTRICAL CODE - SAFETY MANAGEMENT SYSTEM REQUIREMENTS |
| NFPA 85 : 2015 | BOILER AND COMBUSTION SYSTEMS HAZARDS CODE |
| 04/30105027 DC : DRAFT JUNE 2004 | ISO 21789 - GAS TURBINES - SAFETY |
| SAE AS 6479 : 2014 | SPLICER, FUSION, FIBER OPTIC, AEROSPACE |
| API 546 : 2008 | BRUSHLESS SYNCHRONOUS MACHINES - 500 KVA AND LARGER |
| ISA TR12.21.01 : 2004 | USE OF FIBER OPTIC SYSTEMS IN CLASS 1 HAZARDOUS (CLASSIFIED) LOCATIONS |
| ISA TR12.06.01 : 1999 | ELECTRICAL EQUIPMENT IN A CLASS 1, DIVISION 2/ZONE 2 HAZARDOUS LOCATION |
| API 505 : 1997 | RECOMMENDED PRACTICE FOR CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS AT PETROLEUM FACILITIES CLASSIFIED AS CLASS I, ZONE 0, ZONE 1, AND ZONE 2 |
| API RP 14F:2008 | DESIGN, INSTALLATION, AND MAINTENANCE OF ELECTRICAL SYSTEMS FOR FIXED AND FLOATING OFFSHORE PETROLEUM FACILITIES FOR UNCLASSIFIED AND CLASS 1, DIVISION 1 AND DIVISION 2 LOCATIONS |
| API 540:1999 | ELECTRICAL INSTALLATIONS IN PETROLEUM PROCESSING PLANTS |
| API 2610:2005 | DESIGN, CONSTRUCTION, OPERATION, MAINTENANCE, AND INSPECTION OF TERMINAL AND TANK FACILITIES |
| I.S. EN ISO 16852:2016 | FLAME ARRESTERS - PERFORMANCE REQUIREMENTS, TEST METHODS AND LIMITS FOR USE (ISO 16852:2016) |
| 13/30276640 DC : 0 | BS EN 62282-4-101 ED 1.0 - FUEL CELL TECHNOLOGIES - PART 4-101: FUEL CELL POWER SYSTEMS FOR PROPULSION FOR OTHER THAN ROAD VEHICLES AND AUXILIARY POWER UNITS - FUEL CELL POWER SYSTEMS FOR ELECTRICALLY POWERED INDUSTRIAL TRUCKS - SAFETY |
| ISO 16852:2016 | Flame arresters — Performance requirements, test methods and limits for use |
| BS EN 62282-4-101:2014 | Fuel cell technologies Fuel cell power systems for propulsion other than road vehicles and auxiliary power units (APU). Safety of electrically powered industrial trucks |
| IEC 62282-4-101:2014 | Fuel cell technologies - Part 4-101: Fuel cell power systems for propulsion other than road vehicles and auxiliary power units (APU) - Safety of electrically powered industrial trucks |
| BS ISO 19372:2015 | Microturbines applications. Safety |
| BS ISO 19859:2016 | Gas turbine applications. Requirements for power generation |
| EI 1540 : 2014 | DESIGN, CONSTRUCTION, COMMISSIONING, MAINTENANCE AND TESTING OF AVIATION FUELLING FACILITIES |
| EI MODEL CODE SAFE PRACTICE PT7 : 1998 | DESIGN, CONSTRUCTION, OPERATION AND MAINTENANCE OF AVIATION FUELLING FACILITIES |
| ICC ICCPC INTERNATIONAL PERFORMANCE CODE : 2015 | ICC PERFORMANCE CODE FOR BUILDINGS AND FACILITIES |
| ISO 16924:2016 | Natural gas fuelling stations — LNG stations for fuelling vehicles |
| NFPA 484 : 2015 | COMBUSTIBLE METALS |
| IEEE 1349-2011 REDLINE | IEEE Guide for Application of Electric Motors in Class I, Division 2 and Class I, Zone 2 Hazardous (Classified) Locations |
| NFPA 350 : 2016 | SAFE CONFINED SPACE ENTRY AND WORK |
| CSA C22.4 No. 1 : 2009(R2018) | OBJECTIVE-BASED INDUSTRIAL ELECTRICAL CODE |
| API 2001 : 2012 | FIRE PROTECTION IN REFINERIES |
| API 14FZ : 2013 | RECOMMENDED PRACTICE FOR DESIGN, INSTALLATION, AND MAINTENANCE OF ELECTRICAL SYSTEMS FOR FIXED AND FLOATING OFFSHORE PETROLEUM FACILITIES FOR UNCLASSIFIED AND CLASS 1, ZONE 0, ZONE 1, AND ZONE 2 LOCATIONS |
| SAE J 3030 : 2015 | AUTOMOTIVE REFRIGERANT RECOVERY/RECYCLING/RECHARGING EQUIPMENT INTENDED FOR USE WITH BOTH R-1234YF AND R-134A |
| API 14F REDLINE : 2008 | DESIGN, INSTALLATION, AND MAINTENANCE OF ELECTRICAL SYSTEMS FOR FIXED AND FLOATING OFFSHORE PETROLEUM FACILITIES FOR UNCLASSIFIED AND CLASS 1, DIVISION 1 AND DIVISION 2 LOCATIONS |
| API 500 : 2012 | RECOMMENDED PRACTICE FOR CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS AT PETROLEUM FACILITIES CLASSIFIED AS CLASS 1, DIVISION 1 AND DIVISION 2 |
| NFPA 1 : 2018 | FIRE CODE |
| 14/30244780 DC : 0 | BS ISO 19859 - GAS TURBINE APPLICATIONS - REQUIREMENTS FOR POWER GENERATION |
| EN ISO 16852:2016 | Flame arresters - Performance requirements, test methods and limits for use (ISO 16852:2016) |
| EN 62282-4-101:2014 | Fuel cell technologies - Part 4-101: Fuel cell power systems for propulsion other than road vehicles and auxiliary power units (APU) - Safety of electrically powered industrial trucks |
| PIP ELEHA01 : 2016 | ENGINEERING GUIDE FOR DETERMINING ELECTRICAL AREA CLASSIFICATION |
| NFPA 850:2020 | Recommended Practice for Fire Protection for Electric Generating Plants and High Voltage Direct Current Converter Stations |
| PIP PNE00003 : 2013 | PROCESS UNIT AND OFFSITES LAYOUT GUIDE |
| PIP PCEPA002 : 2016 | PROCESS ANALYZER PROJECT IMPLEMENTATION GUIDELINES |
| CSA FC 3 : 2004 | PORTABLE FUEL CELL POWER SYSTEMS |
| ANSI/CSA AMERICA FC 3-2004 (R2017) | PORTABLE FUEL CELL POWER SYSTEMS |
| API RP 2001:2019 | Fire Protection in Refineries |
| PIP PNE00003 : 2019 | Process Unit and Offsites Layout Guide |
| API 500 : 2012 | RECOMMENDED PRACTICE FOR CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS AT PETROLEUM FACILITIES CLASSIFIED AS CLASS 1, DIVISION 1 AND DIVISION 2 |
| 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 |
| CGA G 2.1 : 2014 | REQUIREMENTS FOR THE STORAGE AND HANDLING OF ANHYDROUS AMMONIA |
| IEC 60079-20-1:2010 | Explosive atmospheres - Part 20-1: Material characteristics for gas and vapour classification - Test methods and data |
| NFPA 33 : 2016 | SPRAY APPLICATION USING FLAMMABLE OR COMBUSTIBLE MATERIALS |
| ISA RP12.12.03 : 2002 | PORTABLE ELECTRONIC PRODUCTS SUITABLE FOR USE IN CLASS 1 AND 2, DIVISION 2, CLASS 1 ZONE 2 AND CLASS 3, DIVISION 1 AND 2 HAZARDOUS (CLASSIFIED) LOCATIONS |
| NFPA 35 : 2016 | MANUFACTURE OF ORGANIC COATINGS |
| IEC 60079-11:2011 | Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i" |
| EI Model code of safe practice Part 15:2015 | MODEL CODE OF SAFE PRACTICE - PART 15: AREA CLASSIFICATION FOR INSTALLATIONS HANDLING FLAMMABLE FLUIDS |
| NFPA 55 : 2016 | COMPRESSED GASES AND CRYOGENIC FLUIDS CODE |
| API 505 : 1997 | RECOMMENDED PRACTICE FOR CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS AT PETROLEUM FACILITIES CLASSIFIED AS CLASS I, ZONE 0, ZONE 1, AND ZONE 2 |
| ASHRAE 15 AND 34 PACKAGE : 2016 | ASHRAE 15: SAFETY STANDARD FOR REFRIGERATION SYSTEMS - ASHRAE 34: DESIGNATION AND SAFETY CLASSIFICATION OF REFRIGERANTS |
| NFPA 45 : 2015 | FIRE PROTECTION FOR LABORATORIES USING CHEMICALS |
| NFPA 70 : 2017 | NATIONAL ELECTRICAL CODE |
| ASTM D 93 : 2016-07 | TEST METHODS FOR FLASH POINT BY PENSKY-MARTENS CLOSED CUP TESTER |
| NFPA 59A : 2016 | PRODUCTION, STORAGE, AND HANDLING OF LIQUEFIED NATURAL GAS (LNG) |
| NFPA FIRE PROT GUIDE ON HAZARDOUS MAT : 2010 | FIRE PROTECTION GUIDE TO HAZARDOUS MATERIALS |
| NFPA 30 : 2018 | FLAMMABLE AND COMBUSTIBLE LIQUIDS CODE |
| ASTM E 659 : 2015 : REDLINE | Standard Test Method for Autoignition Temperature of Chemicals |
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