UNE-EN 60079-13:2018

This part of IEC 60079 gives requirements for the design, construction, assessment, verification and marking of rooms:

-located in an explosive atmosphere without an internal source of release and protected by pressurization or artificial ventilation;

-located in a non-hazardous area or Zone 2 area, containing an internal source of release and protected by artificial ventilation;

-located in an explosive atmosphere, containing an internal source of release and protected by both pressurisation 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 and includes inlet and outlet ducts. An acoustic hood and other like enclosures designed to permit the entry of personnel may be considered as a room.

This standard also includes requirements for associated equipment, safety devices and controls necessary to ensure that artificial ventilation, purging and pressurization is established and maintained.

A room assembled or constructed on site, may be either on land or off-shore, and designed to facilitate the entry of personnel. 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 is to be completed on site. Verification of compliance with this standard is intended to be completed on site, by the user.

Rooms may be located in an explosive gas atmosphere requiring Equipment Protection Levels (EPL) Gb or Gc. or a combustible dust atmosphere requiring Equipment Protection Levels (EPL) Db, or Dc.

This part 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 are used 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 standard. It is recognised that such applications are special cases, which in part may be addressed using the principles from standard IEC 60079-2 (Equipment protection by pressurized enclosure), but in all probability will also be the subject of additional, stringent engineering standards, procedures and practices.

NOTE 1 Maintenance requirements are contained in Annex A until they can be included in IEC 60079-17.

NOTE 2 For the purposes of this standard, the terms "lower flammable limit (LFL)" and "lower explosive limit (LEL)" are deemed to be synonymous, and likewise the terms "upper flammable limit (UFL)" and "upper explosive limit (UEL)" are deemed to be synonymous. For ease of reference, the two abbreviations LFL and UFL may be used hereinafter to denote these two sets of terms. It should be recognized that particular authorities having jurisdiction may have overriding requirements that dictate the use of one of these sets of terms and not the other

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