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Reference EN 50281-2-1:1998
Title Electrical apparatus for use in the presence of combustible dust - Part 2-1: Test methods - Methods for determining the minimum ignition temperatures of dust
Project Number 6369
Abstract/Scope This European Standard specifies two test methods for determining the minimum ignition temperatures of dust for the purpose of selecting electrical apparatus for use in the presence of combustible dust in accordance with EN 50281-1-2:1998 and constructed in accordance with EN 50281-1-1:1998. These methods are not suitable for use with substances having explosive properties. Method A (clause 4) is applicable to the determination of the minimum temperature of a prescribed hot surface which will result in the decomposition and/or ignition of a layer of dust of a specified thickness deposited on it. The method is particularly relevant to industrial equipment with which dusts are present on hot surfaces in thin layers exposed to the atmosphere. Method B (clause 5) is applicable to the determination of the minimum temperature of a prescribed hot surface which will result in the ignition of a cloud of given sample of dust or other particulate solid. The test is intended to be carried out as a complementary test after determining the minimum ignition temperature of a dust layer by method A of this European Standard. NOTE 1 concerning method B: Because the method of operation of the furnace gives short residence times for dust particles within it, this method of test is applicable to industrial equipment where dust is present as a cloud for a short time. This method of test is of small scale and the results are not necessarily representative of all industrial conditions NOTE 2 concerning method B: The method is not applicable to dusts which may, over a longer period of time than provided for in the test method, produce gasses from deposits generated during pyrolysis or smouldering


Current Stage code 6060
Current Stage code date 1998-09-09
Current Stage code deadline 1999-09-01
Deadline date for vote  


Directive(s) ATEX (94/9/EC)
Order Voucher BC/CLC/92-05


IEC Technical Body IEC/TC 31
Reference Document  
ICS 29.260.20 - Electrical apparatus for explosive atmospheres
Keywords Combustible dust; Minimum ignition temperature; Test method
Note Corrigendum to EN issued August 1999
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 1998-09-09 1999-09-01 export to doc file  EN
5099 1998-09-01 1998-10-01  
5091 1997-12-09 1998-03-11  
5062 1997-11-10 1998-01-01  
5020 1997-04-03 1997-09-30  
3090 1996-11-07 1997-05-07  
3020 1996-01-19 1996-10-10  
1599 1995-11-28 1996-05-28  
1520 1995-05-12 1995-09-01  
1099 1995-03-06 1995-04-06  
1020 1995-02-10 1995-07-10  
1000 1995-01-31    

Implementation Dates

date of Ratification (DOR) (1) 1998-09-01
date of Availability (DAV) (2) 1998-09-09
date of Announcement (DOA) (3) 1999-03-01
date of Publication (DOP) (4) 1999-09-01
date of Withdrawal (DOW) (5) 2003-06-30


Superseded by  
Normative reference (6)  

(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved

(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat

(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level

(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement

(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn

(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.