Standard

BS EN 60079-13:2017

Explosive atmospheres - Equipment protection by pressurized room "p" and artificially ventilated room "v"

Current, Under Review

•

Published:

30 Nov 2017

1 Scope

This part of IEC 60079 gives requirements for the design, construction, assessment, verification and marking of rooms used to protect internal equipment:

— located in a Zone 1 or Zone 2 or Zone 21 or Zone 22 explosive atmosphere (an area normally requiring an equipment protection level (EPL) Gb, Gc, Db or Dc) without an internal source of gas/vapour release and protected by pressurization;
— located in a Zone 2 explosive atmosphere (an area normally requiring EPL Gc) with or without an internal source of gas/vapour release and protected by artificial ventilation;
— located in a non-hazardous area, containing an internal source of gas/vapour release and protected by artificial ventilation;
— located in a Zone 1 or Zone 2 or Zone 21 or Zone 22 explosive atmosphere (an area normally requiring EPL Gb, Gc, Db or Dc), containing an internal source of gas/vapour release and protected by both pressurization and artificial ventilation.

The term "room" used in this document includes single rooms, multiple rooms, a complete building or a room contained within a building. A room is intended to facilitate the entry of personnel and includes inlet and outlet ducts. An acoustic hood and other like enclosures designed to permit the entry of personnel can be considered as a room.

This document also includes requirements related safety devices and controls necessary to ensure that artificial ventilation, purging and pressurization is established and maintained.

A room assembled or constructed on site, can be either on land or off-shore. The room is primarily intended for installation by an end-user but could be constructed and assessed at a manufacturer’s facility, where the final construction such as ducting can be completed on site.

Rooms can be located in an explosive gas atmosphere requiring EPL Gb or Gc, or a combustible dust atmosphere requiring EPL Db, or Dc.

This document does not specify the methods that may be required to ensure adequate air quality for personnel with regard to toxicity and temperature within the room. National or other regulations and requirements may exist to ensure the safety of personnel in this regard.

Protection of rooms by using an inert gas or a flammable gas is outside of the scope of this document. It is recognized that such applications are special cases, which in part may be addressed using the principles from IEC 60079‑2, but in all probability will also be the subject of additional, stringent engineering standards, procedures and practices. Pressurized enclosures for equipment that are not intended to facilitate the entry of personnel are addressed in IEC 60079‑2, and are not in the scope of this document.

NOTE Maintenance recommendations are contained in Annex A until they can be included in IEC 60079‑17.

This document supplements and modifies the general requirements of IEC 60079‑0, except exclusions as indicated in Table 1. Where a requirement of this document conflicts with a requirement of IEC 60079‑0, the requirement of this document takes precedence.

Table 1 — Exclusion of specific clauses or subclauses of IEC 60079‑0

Clause of IEC 60079‑0		IEC 60079‑0 application to IEC 60079‑13
Ed. 6.0 (2011) (Informative)	Clause / subclause title (Normative)	IEC 60079‑0 application to IEC 60079‑13
4	Equipment grouping	Applies
4.1	Group I	Excluded
4.2	Group II	Applies
4.3	Group III	Applies
4.4	Equipment for a particular explosive atmosphere	Applies
5.1	Environmental influences	Applies
5.1.1	Ambient temperature	Applies
5.1.2	External source of heating or cooling	Applies
5.2	Service temperature	Applies
5.3.1	Determination of maximum surface temperature	Applies
5.3.2.1	Group I electrical equipment	Excluded
5.3.2.2	Group II electrical equipment	Applies
5.3.2.3	Group III electrical equipment	Applies
5.3.3	Small component temperature for Group I and Group II electrical equipment	Excluded
6.1	General	Applies
6.2	Mechanical strength	Excluded
6.3	Opening times	Excluded
6.4	Circulating currents	Excluded
6.5	Gasket retention	Excluded
6.6	Electromagnetic and ultrasonic radiating equipment	Applies
7.1	General	Excluded
7.2	Thermal endurance	Excluded
7.3	Resistance to light	Modified
7.4	Electrostatic charges on external non-metallic materials	Excluded
7.5	Accessible metal parts	Excluded
8	Metallic enclosures and metallic parts of enclosures	Excluded
9	Fasteners	Excluded
10	Interlocking devices	Excluded
11	Bushings	Excluded
12	Materials used for cementing	Excluded
13	Ex components	Excluded
14	Connection facilities and termination compartments	Excluded
15	Connection facilities for earthing and bonding conductors	Excluded
16	Entries into enclosures	Excluded
17	Supplementary requirements for rotating electrical machines	Excluded
18	Supplementary requirements for switchgear	Excluded
19	Supplementary requirements for fuses	Excluded
20	Supplementary requirements for plugs and sockets	Excluded
21	Supplementary requirements for luminaires	Excluded
22	Supplementary requirements for caplights and handlights	Excluded
23	Equipment incorporating cells and batteries	Excluded
24	Documentation	Applies
25	Compliance of prototype or sample with documents	Applies
26.1	General	Applies
26.2	Test configuration	Applies
26.3	Tests in explosive test mixtures	Excluded
26.4	Tests of enclosures	Excluded
26.5	Thermal tests	Excluded
26.6	Torque test for bushings	Excluded
26.7	Non-metallic enclosures or non-metallic parts of enclosures	Excluded
26.8	Thermal endurance to heat	Excluded
26.9	Thermal endurance to cold	Excluded
26.10	Resistance to light	Applies
26.11	Resistance to chemical agents for Group I electrical equipment	Excluded
26.12	Earth continuity	Excluded
26.13	Surface resistance test of parts of enclosures of non-metallic materials	Excluded
26.14	Measurement of capacitance	Excluded
26.15	Verification of ratings of ventilating fans	Excluded
26.16	Alternative qualification of elastomeric sealing O-rings	Excluded
27	Routine tests	Applies
28	Manufacturers responsibility	Applies
29.1	Applicability	Applies
29.2	Location	Modified
29.3	General	Modified
29.4	Ex marking for explosive gas atmospheres	Modified
29.5	Ex marking for explosive dust atmospheres	Applies
29.6	Combined types of protection	Applies
29.7	Multiple types of protection	Excluded
29.8	Ga using two independent Gb types of protection	Excluded
29.9	Ex components	Excluded
29.10	Small equipment and small Ex components	Excluded
29.11	Extremely small equipment and extremely small Ex components	Modified
29.12	Warning markings	Applies
29.13	Alternate marking of equipment protection levels (EPLs)	Excluded
29.14	Cells and batteries	Applies
30	Instructions	Modified
Annex A	Supplementary requirements for Ex cable glands	Excluded
Annex B	Requirements for Ex components	Excluded
Annex C	Example of rig for resistance to impact test	Excluded
Annex D	Introduction to an alternative risk assessment method encompassing "equipment protection levels" for Ex equipment	Applies

Applies: this requirement of IEC 60079‑0 is applied without change.

Excluded: this requirement of IEC 60079‑0 does not apply.

Modified: this requirement of IEC 60079‑0 is modified as detailed in this document.

NOTE The applicable requirements of IEC 60079‑0 are identified by the clause title which is normative. This table was written against the specific requirements of IEC 60079‑0, Ed 6.0.

Product Details

Descriptors

Safety devices

Flammable atmospheres

Explosive atmospheres

Rooms

Electrical equipment

Gas detectors

Pressurization

Gas flow

Air purification

Gases

Buildings

Dust

Air

Type p protected electrical equipment

Protected electrical equipment

Electrical safety

Verification

Performance testing

ICS Codes

29.260.20 Electrical apparatus for explosive atmospheres

Committee

EXL/31

International relationships

Identical to:

EN 60079-13:2017

IEC 60079-13:2017

ISBN

978 0 580 87832 9

Publisher

BSI