EXPLOSIVE ATMOSPHERES - PART 2: EQUIPMENT PROTECTION BY PRESSURIZED ENCLOSURE 'P'
International Electrotechnical Committee
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Protection levels
5 Constructional requirements for pressurized
enclosures
6 Temperature limits
7 Safety provisions and safety devices (except
for static pressurization)
8 Safety provisions and safety devices for static
pressurization
9 Supply of protective gas
10 Pressurized equipment with an internal source
of release
11 Release conditions
12 Design requirements for the containment system
13 Protective gas and pressurizing techniques when
there is an internal source of release
14 Ignition-capable equipment
15 Internal hot surfaces
16 Type verification and tests
17 Routine tests
18 Marking
19 Instructions
Annex A (normative) - Purging and dilution tests
Annex B (informative) - Examples of functional sequence
diagram
Annex C (informative) - Examples of the changes in pressure
in ducts and enclosures
Annex D (informative) - Information to be provided to the user
Annex E (normative) - Classification of the type of release
within enclosures
Annex F (informative) - Examples for the use of the dilution
area concept
Annex G (normative) - Internal Cells and Batteries for Level
of Protection 'pxb' and Level of Protection 'pyb'
Annex H (normative) - Internal Cells and Batteries for
Level of Protection 'pzc'
Bibliogrphy
Includes the specific requirements for the construction and testing of electrical equipment with pressurized enclosures, of type of protection 'p', intended for use in explosive gas atmospheres or explosive dust atmospheres.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 31 |
