API 500 : 2012
Superseded
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RECOMMENDED PRACTICE FOR CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS AT PETROLEUM FACILITIES CLASSIFIED AS CLASS 1, DIVISION 1 AND DIVISION 2
01-12-2012
10-05-2021
1 Scope
2 Normative References
3 Terms, Definitions, and Acronyms
4 Basic Conditions for a Fire or Explosion
5 Flammable and Combustible Liquids, Gases
and Vapors
6 Classification Criteria
7 Extent of a Classified Location
8 Recommendations for Determining Degree and
Extent of Classified Locations - Common
Applications
9 Recommendations for Determining Degree and
Extent of Classified Locations in Petroleum
Refineries
10 Recommendations for Determining Degree and
Extent of Classified Locations at Drilling Rigs
and Production Facilities on Land and on Marine Fixed
Platforms
11 Recommendations for Determining Degree and Extent
of Classified Locations on Mobile Offshore Drilling
Units (MODUs)
12 Recommendations for Determining Degree and Extent
of Classified Locations at Drilling Rigs
and Production Facilities on Floating Production Units
13 Reserved for Future Use
14 Recommendations for Determining Degree and Extent
of Classified Locations at Petroleum Pipeline
Transportation Facilities
Annex A (informative) - Sample Calculation to Achieve
Adequate Ventilation of an Enclosed Area by
Natural Means Using Equation 1 and Equation 2
Annex B (informative) - Calculation of Minimum Air
Introduction Rate to Achieve Adequate Ventilation
Using Fugitive Emissions
Annex C (informative) - Development of Ventilation Criteria
Annex D (informative) - An Alternate Method for Area
Classification
Annex E (informative) - Procedure for Classifying Locations
Annex F (informative) - Preferred Symbols for Denoting Class I,
Division 1 and Division 2 Hazardous (Classified) Locations
Gives guidelines for classifying locations Class I, Division 1 and Class I, Division 2 at petroleum facilities for the selection and installation of electrical equipment.
| DevelopmentNote |
Supersedes API 500A, API 500B and API 500C. (08/2002) Russian edition of 2ED 1997 is also available, see API 500 RUSSIAN. (12/2012) Also available in Kazakh version, see API 500 KAZAKH. (02/2016)
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| DocumentType |
Standard
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| Pages |
192
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| ProductNote |
NEW CHILD ERR 1 2014 IS NOW ADDED This product is unavailable in Cuba, Iran, North Korea, Syria
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| PublisherName |
American Petroleum Institute
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| Status |
Superseded
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| SupersededBy | |
| Supersedes |
A newer version of this standard is available.
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