BS EN 60079-13:2010

This part of IEC 60079 gives requirements for the design, construction, assessment and testing and marking of rooms protected by pressurization in: a room located in an explosive gas atmosphere or explosive dust atmosphere hazardous area that does not include an internal source of a flammable substance; a room located in an explosive gas atmosphere or explosive dust atmosphere hazardous area that includes an internal source of a flammable substance; a room located in a non-hazardous area that includes an internal source of a flammable substance. NOTE If ventilation is used and pressurization is not used, then this part of IEC 60079 does not apply. The situation is covered by the requirements of IEC 60079-10-1. A room may be a single room, multiple rooms, a complete building or a room contained within a building and includes inlet and outlet ducts. This part of IEC 60079 also includes requirements for associated equipment, safety devices and controls necessary to ensure that pressurization is established and maintained. This part of IEC 60079 covers rooms or buildings that are constructed or assembled on site, which may be either on land or off-shore, designed to facilitate the entry of personnel and primarily intended for installation by an end-user and verification on site. The room may be located in an explosive gas atmosphere or a explosive dust atmosphere requiring equipment protection levels (EPL) Gb, Db, Gc or Dc. This part of IEC 60079 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. NOTE 1 Whilst the scope of this part of IEC 60079 does not address toxicity it is vital that proper consideration is given to this aspect to ensure the safety of personnel. National regulations and requirements should be observed in this regard. NOTE 2 There is a related standard IEC60079-2 (Equipment protection by pressurized enclosure) covering the different conditions encountered when using the pressurization technique. NOTE 3 Maintenance needs are contained in Annex B until they are included IEC 60079-17. NOTE 4 For the purposes of this part of IEC 60079, 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 part of IEC 60079 supplements and modifies the general requirements of IEC 60079-0, except 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. Table 1 – Exclusion of specific clauses of IEC 60079-0 Clause of IEC 60079-0 Ed. 4.0 (2004) (Informative) Ed. 5.0 (2007) (Informative) Clause / subclause title (Normative) 4 4 Equipment grouping Applies 4.1 4.1 Group I Applies 4.2 4.2 Group II Applies 4.3 4.3 Group III Applies 4.4 4.4 Equipment for a particular explosive atmosphere Applies 5.1 5.1 Environmental influences Applies 5.1.1 5.1.1 Ambient temperature Applies 5.1.2 5.1.2 External source of heating or cooling Applies 5.2 5.2 Service temperature Applies 5.3.1 5.3.1 Determination of maximum surface temperature Applies 5.3.2.1 5.3.2.1 Group I electrical equipment Applies 5.3.2.2 5.3.2.2 Group II electrical equipment Applies 5.3.2.3 5.3.2.3 Group III electrical equipment Applies 5.3.3 5.3.3 Small component temperature for Group I and Group II electrical equipment Applies 6.1 6.1 General Applies 6.2 6.2 Mechanical strength Excluded 6.3 6.3 Opening times Excluded 6.4 6.4 Circulating currents Excluded 6.5 6.5 Gasket retention Excluded 6.6 6.6 Electromagnetic and ultrasonic radiating equipment Excluded 7 7 Non-metallic enclosures and parts of enclosure Excluded 8 8 Metallic enclosures and metallic parts of enclosures Excluded 9 9 Fasteners Excluded 10 10 Interlocking devices Excluded 11 11 Bushings Excluded 12 12 Materials used for cementing Excluded 13 13 Ex components Excluded 14 14 Connection facilities and termination compartments Excluded 15 15 Connection facilities for earthing and bonding conductors Excluded 16 16 Entries into enclosures Excluded 17 17 Supplementary requirements for rotating electrical machines Excluded 18 18 Supplementary requirements for switchgear Excluded 19 19 Supplementary requirements for fuses Excluded 20 20 Supplementary requirements for plugs and sockets Excluded 21 21 Supplementary requirements for luminaires Excluded 22 22 Supplementary requirements for caplights and handlights Excluded 23 23 Equipment incorporating cells and batteries Excluded 24 24 Documentation Applies 25 25 Compliance of prototype or sample with documents Excluded 26 26 Type tests Excluded 27 27 Routine tests Applies 28 28 Manufacturers responsibility Applies 29.1 29.1 Location Applies 29.2 29.2 General Applies NR 29.3 Ex marking for explosive gas atmospheres Applies NR 29.4 Ex marking for explosive dust atmospheres Applies 29.3 29.5 Combined types of protection Applies NR 29.6 Multiple types of protection Applies NR 29.7 Ga using two independent Gb types of protection Excluded 29.5 29.8 Ex components Excluded 29.6 29.9 Small equipment and small Ex components Excluded 29.7 29.10 Extremely small equipment and extremely small Ex components Excluded 29.8 29.11 Warning markings Applies NR 29.12 Alternate marking of equipment protection levels (EPLs) Applies 29.9 29.13 Cells and batteries Excluded 29.10 29.14 Examples of marking Applies 30 30 Instructions Applies Annex A Annex A Supplementary requirements for Ex cable glands Excluded Annex B Annex B Requirements for Ex components Excluded Annex C Annex C Example of rig for resistance to impact test Applies NR 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. 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. The clause numbers for the 6th and previous edition are shown for information only. This is to enable the General Requirements IEC 60079-0, Ed 5.0, to be used where necessary with this part of IEC 60079. Where there were no requirements for the 5th edition but there are for the 6th edition (indicated by NR against the 5th edition only), or where is a conflict between requirements, the 6th edition requirements should be considered.