TC 31

Equipment for explosive atmospheres

 

Detail

Committee
Working Groups
Project Leader

Current

Status

Frcst Pub

Date

Stability

Date

TC 31PT 60079-42Mr Otto WalchPPUB2019-052021

History

Stage
Document
Downloads
Decision Date
Target Date
PNW
31/1238/NP PDF file 246 kB
2016-01-22 
ANW
31/1250/RVN PDF file 46 kB
2016-05-062016-06
ANW
31/1250A/RVN PDF file 367 kB
2016-05-062016-06
ANW
31/1250B/RVN PDF file 438 kB
2016-05-062016-06
1CD
31/1289/CD PDF file 252 kB
2016-10-212017-04
PCC
2017-01-132017-01
CDM
31/1305A/CC PDF file 268 kB
Word file 70 kB
2017-01-202017-03
ACD
31/1305B/CC PDF file 336 kB
Word file 99 kB
2017-03-312017-03
2CD
31/1315/CD
PDF file 638 kB
2017-04-212017-03
PCC
2017-07-142017-07
CDM
31/1333/CC PDF file 316 kB
Word file 371 kB
2017-08-042017-10
ACDV
31/1333A/CC PDF file 685 kB
Word file 463 kB
2018-06-222018-06
ADTS
2018-06-262018-06
TDTS
2018-07-102018-06
CDTS
31/1418/DTS

2018-08-312018-08
PRVDTS
2018-11-232018-11
APUB
31/1441/RVDTS PDF file 481 kB
Word file 77 kB
2018-12-142018-12
TPUB
2019-01-102018-12
DECPUB
2019-02-212019-02
RPUB
2019-03-112019-03
BPUB
2019-03-262019-06
PPUB
2019-04-172019-05
  

Abstract

IEC TS 60079-42:2019 provides guidance for equipment manufacturers where electrical safety devices are used to reduce the likelihood of potential ignition sources becoming effective in Ex Equipment located in Explosive Atmospheres. Electrical safety devices perform a safety function to control potential ignition sources from both, electrical or non-electrical Ex Equipment in explosive atmospheres.
This Technical Specification may also be applied to a combination of elements performing a safety function. For example: Sensor, Logic system, Final element. This Technical Specification can also be used for assessing the safety device independently, without being designed for a specific Ex Equipment.
A safety device can be a measure to achieve a required EPL of the Ex Equipment with respect to a potential ignition source. The combination of the safety device and the Ex Equipment could then comply with the relevant standards of the IEC 60079 series and the ISO 80079 series with respect to the Equipment Protection Level. However, increasing the EPL of Ex Equipment by the simple addition of a safety device is not within the scope of this Technical Specification.
This Technical Specification does not apply to:
• mechanical control equipment such as pressure relief valves, mechanical governors and other mechanical safety devices
• the use of gas detection
• control equipment to prevent the occurrence of explosive atmospheres, e.g. inerting systems and ventilation systems
• mitigation of an explosion

Project

IEC TS 60079-42:2019 ED1

Explosive atmospheres - Part 42: Electrical safety devices for the control of potential ignition sources for Ex-Equipment