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IEC

IEC 60079-31:2013/ISH1:2022

(Main)

Interpretation Sheet 1 - Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t"

Interpretation Sheet 1 - Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t"

General Information

Status
Published
Publication Date
03-Feb-2022
ICS
29.260.20 - Electrical apparatus for explosive atmospheres
Technical Committee
TC 31 - Equipment for explosive atmospheres
Current Stage
DELPUB - Deleted Publication
Completion Date
04-Feb-2022
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Relations

Revises
IEC 60079-31:2013 - Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t"
Effective Date
05-Sep-2023

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IEC 60079-31:2013/ISH1:2022 - Interpretation Sheet 1 - Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t" Released:2/4/2022IEC 60079-31:2013/ISH1:2022 - Interpretation Sheet 1 - Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t" Released:2/4/2022
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IEC 60079-31:2013/ISH1:2022 - Interpretation Sheet 1 - Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t" Released:2/4/2022
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Standards Content (Sample)

IEC 60079-31:2013/ISH1:2022 – 1 –

© IEC 2022


INTERNATIONAL ELECTROTECHNICAL COMMISSION


____________



IEC 60079-31
Edition 2.0  2013-11





EXPLOSIVE ATMOSPHERES –


Part 31: Equipment dust ignition protection by enclosure "t"


INTERPRETATION SHEET 1



This interpretation sheet has been prepared by IEC technical committee 31: Equipment for
explosive atmospheres.
The text of this interpretation sheet is based on the following documents:
DISH Report on voting
31/1604/DISH 31/1615/RVDISH

Full information on the voting for the approval of this interpretation sheet can be found in the
report on voting indicated in the above table.

___________

IEC 60079-31:2013, Explosive atmospheres – Part 31: Equipment dust ignition protection
by enclosure "t"

Question 1:
The requirements given in 5.3.2 of IEC 60079-31:2013 (Edition 2) permit threaded entries for
dust protected enclosures to be:
• Tapered threads with not less than 3 threads,
• Parallel threads with not less than five threads, with a tolerance class of 6H or better
according to ISO 965-1,
• Parallel threads with less than five threads with a tolerance class of 6H or better
according to ISO 965-1 and are provided with an additional seal or gasket.
Does the description of threads include other thread forms such as ISO 228-1 threads (these
threads are commonly referred to as BSPP or Type G threads and BSPT or Type R threads)?
ICS 29.260.20
IEC 60079-31:2013-11/ISH1:2022-02(en)

---------------------- Page: 1 ----------------------
– 2 – IEC 60079-31:2013/ISH1:2022

© IEC 2022

Answer 1:


No, only metric and NPT threaded entries are permitted for enclosu
...

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