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BS EN 60079-13:2017 – TC:2020 Edition

BS EN 60079-13:2017 – TC:2020 Edition

$217.84

Tracked Changes. Explosive atmospheres – Equipment protection by pressurized room ‘p’ and artificially ventilated room ‘v’

Published By Publication Date Number of Pages
BSI 2020 102
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IEC 60079-13:2017 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 without an internal source of gas/vapour release and protected by pressurization; – located in a Zone 2 explosive atmosphere 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 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. 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. This second edition cancels and replaces the first edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) modification of the title of this document to include artificially ventilated room ‘v’ in addition to pressurized room ‘p’; b) addition of types of protection ‘pb’, ‘pc’, and ‘vc’ and removal of types of protection ‘px’, ‘py’, ‘pz’ and ‘pv’; c) definition of the differences between pressurization and artificial ventilation types of protection; d) removal of protection of rooms with an inert gas or a flammable gas from the scope of this document; e) addition of an informative annex to include examples of applications where types of protection pressurization or artificial ventilation or pressurization and artificial ventilation can be used and associated guidelines.

PDF Catalog

PDF Pages PDF Title
62 National foreword
67 CONTENTS
70 FOREWORD
72 INTRODUCTION
73 1 Scope
74 Tables
Table 1 – Exclusion of specific clauses or subclauses of IEC 60079-0
75 2 Normative references
76 3 Terms and definitions
78 4 Requirements for all rooms
4.1 General
4.2 Type and level of protection
4.2.1 Pressurization "p"
79 4.2.2 Artificial ventilation "v"
4.3 Construction
4.4 Mechanical strength
4.5 Penetrations and seals
4.6 Personnel access doors
80 4.7 Inlets and outlets
4.8 Ducts
4.9 Purging and cleaning
4.9.1 General
4.9.2 Gases – Purging
81 4.9.3 Enclosures within the room
4.10 Ignition prevention under system failure
5 Clean air supply
5.1 General
5.2 Source of clean air
82 5.3 Environmental and air temperature conditions
5.4 Heating, ventilation and air conditioning services
6 Requirements for pressurized rooms
6.1 General
6.1.1 Design
6.1.2 Source of clean air
6.1.3 Flow
6.1.4 Pressurization system
83 6.1.5 Preventing the explosive atmosphere from entering through an open door
6.1.6 Airlock
6.1.7 Outward air velocity through a door
84 6.1.8 Air consuming device
6.1.9 Action when pressurization system fails
6.1.10 Re-energizing the room
6.2 Purging of rooms
6.2.1 General
85 6.2.2 Sequence of operations of the purging safety devices
6.2.3 Dusts – Cleaning
6.3 Minimum safety provisions, safety devices and electrical disconnects
6.3.1 Safety devices
86 6.3.2 Safety devices based upon level of protection
6.3.3 Gas detectors
6.4 Verification for pressurized rooms
6.4.1 General
6.4.2 Tests
Table 2 – Safety devices for pressurized rooms
87 6.4.3 Overpressure test
6.4.4 Purging test
6.4.5 Minimum pressure differential test
6.4.6 Confirmation of the ratings of the safety devices
6.4.7 Verification of sequence of operation of the safety devices
7 Requirements for artificially ventilated rooms
7.1 General
7.1.1 Design
7.1.2 Source of clean air
88 7.1.3 Minimum flow rate
7.1.4 Ventilation system
89 7.1.5 Air consuming device
7.1.6 Safety actions when ventilation system fails
7.1.7 Energizing the artificially ventilated area
Table 3 – Safety actions for artificial ventilation failure
90 7.2 Purging of artificially ventilated rooms
7.2.1 General
7.2.2 Sequence of operations of the purging safety devices
7.3 Minimum safety provisions, safety devices and electrical disconnects
7.3.1 Safety devices
7.3.2 Safety devices based upon equipment protection level
91 7.3.3 Artificial ventilation protection
7.3.4 Gas detectors
7.4 Loss of artificial ventilation
Table 4 – Required safety devices for artificial ventilation
92 7.5 Verification for artificially ventilated rooms
7.5.1 General
7.5.2 Tests
7.5.3 Purging test
7.5.4 Minimum ventilation flow rate test
7.5.5 Confirmation of the ratings of the safety devices
7.5.6 Verification of sequence of operation of the safety devices
93 7.5.7 Testing of ventilation system
8 Marking
8.1 General
8.2 Marking of pressurized rooms
94 8.3 Marking for artificially ventilated rooms
95 9 Instructions
9.1 General
9.2 Technical documentation for pressurized rooms
9.3 Technical documentation for artificially ventilated rooms
96 9.4 Technical documentation for rooms protected by pressurization and artificial ventilation combined
9.5 Modifications
97 Annexes
Annex A (informative)Maintenance
A.1 Periodic verification
A.2 Modifications
98 Annex B (informative) Guidelines when pressurization or artificial ventilation is not immediately restored
99 Annex C (informative) Examples of applications and associated guidelines
C.1 Examples of applications
C.2 Guidelines for gas turbine enclosure/package
100 Bibliography

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BS EN 60079-13:2017 - TC
$217.84