Committee name: EXL/31 – equipment for explosive atmospheres.
Committee scope: under the direction of the British Electro-Technical Committee (BEC) and the Standards Policy and Strategy Committee (SPSC), EXL/31 is the UK mirror committee providing input to international and European standardization work carried out by IEC TC31 and CLC TC 31 respectively.
The scope of IEC TC 31 is to prepare and maintain international standards relating to equipment for use where there is a hazard due to the possible presence of explosive atmospheres of gases, vapours, mists, or combustible dusts. It has three sub-committees, covering:
- SC 31G intrinsically-safe apparatus
- SC 31J classification of hazardous areas and installation requirements
- SC 31M non-electrical equipment and protective systems for explosive atmospheres
The scope of CLC TC 31 covers electrical apparatus for potentially explosive atmospheres.
There are three national sub-committees feeding into the EXL/31 parent committee and these cover:
- Gas detectors (EXL/31/1)
- Intrinsically safe apparatus (EXL/31/2)
- Codes of practice (EXL/31/3)
Some current members: Association of Electrical and Mechanical Trades; BEAMA Ltd; Syngenta; SGS BASEEFA; Council of Gas Detection and Environmental Monitoring; ExVeritas; Fire Industry Association; GAMBICA; Health & Safety Executive; Institution of Engineering and Technology; Institute of Measurement and Control; Intertek Group Plc; SIRA Test & Certification Ltd.
Key standards in progress:
- IEC 60079-2 ED7 - explosive atmospheres - Part 2: equipment protection by pressurized enclosure "p"
- IEC 60079-7 ED6 - explosive atmospheres - Part 7: equipment protection by increased safety "e"
- IEC 60079-45 ED1 - explosive atmospheres – part 45 - electrical ignition systems for internal combustion engines
- IEC 62990-3 ED1 - workplace atmospheres – part 3: gas detectors - electrical apparatus for the detection and measurement of oxygen - performance requirements and test methods
Closing date for applications: 01/10/2021
For more information on this committee’s work, see the Standards Development Portal.