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International
Standard
ISO 20347
Third edition
Personal protective equipment —
2021-12
Occupational footwear
AMENDMENT 1
AMENDMENT 1
2024-01
Équipement de protection individuelle — Chaussures de travail
AMENDEMENT 1
Reference number
ISO 20347:2021/Amd.1:2024(en) © ISO 2024
ISO 20347:2021/Amd.1:2024(en)
© ISO 2024
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ii
ISO 20347:2021/Amd.1:2024(en)
Foreword
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This document was prepared by Technical Committee ISO/TC 94, Personal Safety — Personal protective
equipment, Subcommittee SC 3, Foot protection, in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 161, Foot and leg protectors, in accordance with the
Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
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complete listing of these bodies can be found at www.iso.org/members.html.
iii
ISO 20347:2021/Amd.1:2024(en)
Personal protective equipment — Occupational footwear
AMENDMENT 1
Clause 2 Normative references
Update the reference to “ISO 20344:2021” with “ISO 20344:2021+Amd.1:2024” and update the references
throughout the document accordingly.
Change the title of EN 13832-3:2018 to read as follows:
“Footwear protecting against chemicals — Part 3: Requirements for prolonged contact with chemicals”
5.1, Table 2
In the section “Upper”, add an “X” in the last two cells of the row “Tear strength” to read as follows:
Tear strength 5.4.3 X X X
In the section “Upper”, add an “X” in the last two cells of the row “Water vapour permeability and coefficient”,
to read as follows:
Water vapour permeability 5.4.6 X X X
and coefficient
5.3.2
Replace the subclause with the following:
“When tested in accordance with ISO 20344:2021+Amd.1:2024, 5.7 there shall be no leakage of air. For
design A of class II footwear, this requirement is not applicable.”
rd
5.3.5, 3 paragraph
Replace the paragraph with the following:
“For each leather part tested in accordance with ISO 20344:2021+Amd.1:2024, 6.11, the chromium VI
content shall be less than 3,0 mg/kg.”
nd
5.4.1.1, 2 sentence
Add the wording “, except for water vapour permeability and water vapour coefficient (see 5.4.6).” to the end
of the sentence, to read as follows:
ISO 20347:2021/Amd.1:2024(en)
“Any materials in the upper below the height defined in Table 8 shall meet the requirements of the upper
(see Table 2), except for water vapour permeability (WVP) and water vapour coefficient (WVC) (see
5.4.6).”
5.4.1.2
Replace the text above Figure 6 with the following:
“Hybrid footwear (3.18) consists of two classes of materials: foot section, Area A, class II material and
extended section, area B, class I material.
The Area A, shall be measured as H, between the lowest point of the top of the visible polymer (or rubber)
part and the ground (see Figure 6) and shall have a minimum height corresponding to the values given
in Table 6 for design B. All material extensions above belong to area B.
All materials shall meet the requirements of the upper depending on the class of material (see Table 2).”
5.4.6
Replace the subclause with the following:
“Footwear shall comply with one of the following criteria’s:
a. If the upper contains an area of maximum 10 % of non-water vapour permeable material, measured
according to ISO 20344:2021+Amd.1:2024, 6.2.3, all remaining materials shall fulfil a water vapour
2 2
permeability of at least 0,8 mg/(cm ·h) and the water vapour coefficient shall be at least 15 mg/cm
when tested in accordance with ISO 20344:2021+Amd.1:2024, 6.6, 6.7 and 6.8
b. If the upper contains an area of maximum 50 % of non-water vapour permeable material, measured
according to ISO 20344:2021+Amd.1:2024, 6.2.3, all remaining materials shall fulfil a water vapour
permeability of at least 2,0 mg/(cm ·h)”
5.5.4, Title
Add the abbreviations “WVP” and “WVC” to the title of the subclause, to read as
...