UL 60079-13:2020

1 Scope

1.1 This

part of IEC 60079

standard

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.

1.2 DE 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

The term "room" also

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

UL

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

UL

60079-2, and are not in the scope of this document.

1.3 DR 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

UL

60079-0, except exclusions as indicated in . Where a requirement of this document conflicts with a requirement of

IEC

UL

60079-0, the requirement of this document takes precedence.

1.4 DR Where references are made to IEC, IEC/IEEE, ISO, and ISO/IEC standards, the referenced requirements found in these standards shall apply as modified by any applicable U.S. National Differences for the standard (see Clause 2).

Clause of

IEC

UL

60079-0

IEC

UL

60079-0 application to

IEC

UL

60079-13

Ed. 6.0 (

2011

2013

)

(Informative)

Clause / subclause title

(Normative)

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

UL

60079-0 is applied without change.

Excluded: this requirement of

IEC

UL

60079-0 does not apply.

Modified: this requirement of

IEC

UL

60079-0 is modified as detailed in this document.

NOTE The applicable requirements of

IEC

UL

60079-0 are identified by the clause title which is normative. This table was written against the specific requirements of

IEC

UL

60079-0, Ed 6.0.

Published Code	UL
Published By	Underwriters Laboratories Inc.
Publication Date	2020-05-22
Pages Count	49
Language	English
Edition	1
File Size	727.0 KB