prEN IEC 60721-2-5:2023
(Main)Classification of environmental conditions - Part 2: Environmental conditions appearing in nature - Section 5: Dust, sand, salt mist
Classification of environmental conditions - Part 2: Environmental conditions appearing in nature - Section 5: Dust, sand, salt mist
Klassifizierung von Umweltbedingungen - Teil 2: Natürliche Umweltbedingungen - Hauptabschnitt 5: Staub, Sand, Salznebel
Classification des conditions d'environnement - Partie 2: Conditions d'environnement présentes dans la nature - Section 5: Poussière, sable, brouillard salin
Klasifikacija okoljskih pogojev - 2. del: Okoljski pogoji v naravi - 5. odsek : Prah, pesek, solna meglica
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Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2024
Klasifikacija okoljskih pogojev - 2. del: Okoljski pogoji v naravi - 5. odsek : Prah,
pesek, solna meglica
Classification of environmental conditions - Part 2: Environmental conditions appearing
in nature - Section 5: Dust, sand, salt mist
Klassifizierung von Umweltbedingungen - Teil 2: Natürliche Umweltbedingungen -
Hauptabschnitt 5: Staub, Sand, Salznebel
Classification des conditions d'environnement - Partie 2: Conditions d'environnement
présentes dans la nature - Section 5: Poussière, sable, brouillard salin
Ta slovenski standard je istoveten z: prEN IEC 60721-2-5:2023
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
104/1025/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60721-2-5 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-11-17 2024-02-09
SUPERSEDES DOCUMENTS:
104/979/CD, 104/992A/CC
IEC TC 104 : ENVIRONMENTAL CONDITIONS, CLASSIFICATION AND METHODS OF TEST
SECRETARIAT: SECRETARY:
Sweden Mr Henrik Lagerström
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
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The CENELEC members are invited to vote through the
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the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Classification of environmental conditions - Part 2: Environmental conditions appearing in
nature - Section 5: Dust, sand, salt mist
PROPOSED STABILITY DATE: 2028
NOTE FROM TC/SC OFFICERS:
download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National
Committee positions. You may not copy or "mirror" the file or printed version of the document, or any part of it,
for any other purpose without permission in writing from IEC.
IEC CDV 60721-2-5 © IEC 2023 2 104/1025/CDV
1 CONTENTS
2 CONTENTS .1
3 FOREWORD .4
4 1 Scope .7
5 2 Normative references .7
6 3 Terms and definitions .7
7 4 Dust and sand .7
8 4.1 Classification of dust and sand .7
9 4.2 Sand – distribution, hardness and angularity .7
10 4.2.1 Distribution . 7
11 4.2.2 Hardness and angularity . 8
12 4.3 Dust - distribution, concentration and particle size .9
13 4.3.1 General . 9
14 4.3.2 Distribution . 9
15 4.3.3 Concentration . 9
16 4.3.4 Particle size . 10
17 4.3.5 Dust concentrations in sheltered or enclosed locations . 11
18 4.4 Factors affecting the dust and sand environment . 11
19 4.4.1 Geographical distribution . 11
20 4.4.2 Wind . 12
21 4.4.3 Temperature, humidity and precipitation . 12
22 4.5 Information on dust and sand conditions . 12
23 4.5.1 General . 12
24 4.5.2 Present weather codes . 12
25 4.5.3 Ground and satellite based measurements . 13
26 4.5.4 Unified dust models . 15
27 4.6 Deleterious effects of dust and sand . 17
28 4.6.1 General effects . 17
29 4.6.2 Abrasion of surfaces . 18
30 4.6.3 Abrasive wear of mechanisms . 18
31 4.6.4 Corrosion of metals . 18
32 5 Salt mist . 18
33 5.1 Constituents . 18
34 5.2 Salinity concentration . 18
35 5.3 Deposition of sea salt . 19
36 5.4 Concentrations of salt particles . 20
37 5.5 Factors affecting the atmospheric salt mist content . 21
38 5.6 Deleterious effects of salt mist . 21
39 Bibliography . 23
41 Figure 1 – Dust Storm frequency map produced by Engelstaedter [3] . 14
IEC CDV 60721-2-5 © IEC 2023 3 104/1025/CDV
42 Figure 2 – Average aerosol optical depth developed from satellite measurements [5] 14
43 Figure 3 – Global distribution of seasonal mean aerosol optical depth (blue)
44 over-plotted by dust optical depth (red). [4] . 15
45 Figure 4 – Sea salt distribution over land masses (average salt deposition
46 values over the year) . 19
47 Figure 5 – Sodium chloride deposit (on wet linen) varying with distance
48 from the seashore . 19
50 Table 1 – Hardness scale .7
51 Table 2 – Constituents of natural sands .7
52 Table 3 – Typical dust concentrations in various temperate regions .8
53 Table 4 − Variation of concentration of dust with increasing altitude .9
54 Table 5 – Typical dust concentrations surrounding a tracked vehicle operating
55 over desert terrain .9
56 Table 6 – Variation of particle size distribution with height of dust storm . 10
57 Table 7 – WMO present weather codes relating to duststorms and sandstorms . 12
58 Table 8 – Principal constituents of seawater. 18
59 Table 9 – Main influencing factors of atmospheric salt mist content . 20
IEC CDV 60721-2-5 © IEC 2023 4 104/1025/CDV
62 INTERNATIONAL ELECTROTECHNICAL COMMISSION
63 ____________
65 CLASSIFICATION OF ENVIRONMENTAL CONDITIONS –
67 Part 2-5: Environmental conditions appearing in nature –
68 Dust, sand and salt mist
70 FOREWORD
71 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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80 organizations.
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98 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
99 Publications.
100 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
101 indispensable for the correct application of this publication.
102 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
103 patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
104 International Standard IEC 60721-2-5 has been prepared by IEC technical committee 104:
105 Environmental conditions, classification, and methods of test.
106 This second edition cancels and replaces the first edition, published in 1997, and constitutes a
107 technical revision.
108 This edition includes the following significant technical changes with respect to the previous
109 edition:
110 a) The Information provided in previous issue has been extensively enhanced and revised.
111 b) New information on methodologies for deriving dust and sand severities has been
112 included.
IEC CDV 60721-2-5 © IEC 2023 5 104/1025/CDV
113 c) Annex A has been removed because, despite extensive investigation, the source and
114 accuracy of the severities could not be verified. Equivalent information is now provided
115 within the text.
116 The text of this International Standard is based on the following documents:
FDIS Report on voting
xxx xxx
117 Full information on the voting for the approval of this International Standard can be found in
118 the report on voting indicated in the above table.
119 This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
120 A list of all parts in the IEC 60721 series, published under the general title Classification of
121 environmental conditions, can be found on the IEC website.
122 The committee has decided that t
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