ISA RP12.24.01 : 1998
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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RECOMMENDED PRACTICE FOR CLASSIFICATIONS OF LOCATIONS FOR ELECTRICAL INSTALLATIONS CLASSIFIED AS CLASS I ZONE 0, ZONE 1, OR ZONE 2
Hardcopy
15-06-2014
English
01-01-1998
Foreword
1 General
1.1 Scope
1.2 References
1.3 Purpose
2 Definitions and terms
2.10 Explosive limits
3 Safety and area classification
3.1 Safety principles
3.2 Area classification objectives
4 Area classification procedure
4.1 General
4.2 Sources of release
4.3 Type of Zone
4.4 Extent of Zone
4.5 Extent of Zone - General comments
5 Ventilation
5.1 General
5.2 Main types of ventilation
5.3 Degree of ventilation
5.4 Availability of ventilation
6 Documentation
6.1 General
6.2 Drawings, data sheets and tables
Annex A (informative) - Examples of source of release
A.1 - Process plants and facilities
A.2 - Openings
Annex B (informative) - Ventilation
B.1 - Natural ventilation
B.2 - Artificial ventilation
B.3 - Degree of ventilation
B.4 - Assessment of degree of ventilation and its
influence on the hazardous area
B.5 - Availability of ventilation
B.6 - Practical guide
B.7 - Calculations to ascertain the degree of
ventilation
Annex C (informative) - Examples of hazardous area
classification
Annex D (informative) - Use of combustible gas detection
equipment
Annex E (informative) - United States major deviations
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