prEN ISO 16602-4

SLOVENSKI STANDARD
01-september-2025
Varovalna obleka za zaščito pred kemikalijami - Klasifikacija, označevanje in
zahtevane lastnosti - 4. del: Preskusne metode, klasifikacija in zahteve za posebne
modele in sestavne dele kompleta, vključno z rokavicami, obutvijo in respiratorji
(ISO/DIS 16602-4:2025)
Protective clothing for protection against chemicals - Classification, labelling and
performance requirements - Part 4: Test methods, classification and requirements for
specific designs and ensemble components including gloves, footwear, and respirators
(ISO/DIS 16602-4:2025)
Schutzkleidung gegen Chemikalien - Klassifizierung, Kennzeichnung und
Leistungsfähigkeit - Teil 4: Design
Habillement de protection contre les produits chimiques - Classification, étiquetage et
exigences de performances - Partie 4: Méthodes d'essai, classification et exigences pour
des conceptions spécifiques et des composants d'ensembles, y compris les gants, les
chaussures et les appareils de protection respiratoire (ISO/DIS 16602-4:2025)
Ta slovenski standard je istoveten z: prEN ISO 16602-4
ICS:
13.340.10 Varovalna obleka Protective clothing
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 16602-4
ISO/TC 94/SC 13
Protective clothing for protection
Secretariat: SNV
against chemicals — Classification,
Voting begins on:
labelling and performance
2025-07-02
requirements —
Voting terminates on:
2025-09-24
Part 4:
Test methods, classification and
requirements for specific designs
and ensemble components
including gloves, footwear, and
respirators
ICS: 13.340.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 16602-4:2025(en)
DRAFT
ISO/DIS 16602-4:2025(en)
International
Standard
ISO/DIS 16602-4
ISO/TC 94/SC 13
Protective clothing for protection
Secretariat: SNV
against chemicals — Classification,
Voting begins on:
labelling and performance
requirements —
Voting terminates on:
Part 4:
Test methods, classification and
requirements for specific designs
and ensemble components
including gloves, footwear, and
respirators
ICS: 13.340.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
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NATIONAL REGULATIONS.
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TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: +41 22 749 01 11
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 16602-4:2025(en)
ii
ISO/DIS 16602-4:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General requirements for garments and ensembles . 3
4.1 General .3
4.2 Vapour/gas resistant design . .4
4.3 Inward-leakage and particulate resistant design .4
4.4 Liquid resistant designs .5
4.4.1 General .5
4.4.2 Testing and requirements .6
4.5 Face protection (Visor and face-piece) .7
4.5.1 Respiratory Protective Device (RPD) .7
4.5.2 Carbon dioxide content of inhaled air test .7
4.5.3 Air flow rate warning device .7
4.5.4 Overpressure at minimum and maximum air flow rate .8
4.5.5 Noise associated with the air supply to the suit .8
4.5.6 Integral visors.9
4.6 Breathing air and ventilation system .10
4.6.1 Airline pass-through .10
4.6.2 Air-supply system . . .10
4.6.3 Ventilating hose .10
4.6.4 Exhaust assemblage .11
4.7 Gloves and footwear .11
4.7.1 Integral/attached gloves .11
4.7.2 Over-gloves .11
4.7.3 Chemical protective footwear .11
5 Incompatibilities .12
Annex A (informative) Relationship between this European Standard and the essential
requirements of Regulation (EU) 2016/425 of the European Parliament and of the
Council of 9 March 2016 on personal protective equipment aimed to be covered .13
Bibliography . 17

iii
ISO/DIS 16602-4:2025(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee [or Project Committee] ISO/TC 94, Personal safety —
Personal protective equipment, Subcommittee SC 13, Protective clothing.
This second edition cancels and replaces the first edition ISO 16602:2007. The standard has completely been
rewritten and split into parts, with the most significant changes compared to the previous edition relating
to: (1) a new modular approach, (2) marking, (3) chemical protection.
A list of all parts in the ISO 16602 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
ISO/DIS 16602-4:2025(en)
Introduction
This document addresses the design requirements for chemical protective clothing by designating specific
design types and providing classification of clothing, material, and component performance. This document
is intended to provide comprehensive design requirements for the performance of chemical protective
clothing together with ISO/DIS 16602-1 and ISO/DIS 16602-5.
This document is part of a series of standards for test methods and requirements for both limited use and
reusable chemical protective clothing. ISO/DIS 16602 consists of the following parts, under the general
title "Protective clothing for protection against chemicals — Classification, labelling and performance
requirements":
— Part 1: General requirements;
— Part 2: Physical test methods, classification and requirements;
— Part 3: Chemical test methods, classification and requirements;
— Part 4: Test methods, classification and requirements for specific designs and ensemble components
including gloves, footwear, and respirators;
— Part 5: Garment test methods, classification and requirements;
— Part 6: Guidance on Selection, Use, Care and Maintenance.
This series of documents is intended to provide a modular approach to design and specification for chemical
protective clothing accommodating the variety and severity of risks found, and activities carried out, in the
workplace. This document includes the requirements of ISO 8194 on radiation protection so that it can be
withdrawn.
The Type 1 through Type 6 garments were originally created to differentiate garment performance through
a specific garment test(s): These “Type” garments could not be placed in an intrinsic hierarchy, although
the fabric barrier performances (intrinsic properties of the fabric and seams) created an indirect hierarchy
in certain cases. For example, Type 1 is in general more protective than Type 2, Type 5 and Type 6; and
Type 3 is, in general, more protective than Type 4 and Type 6. Although the Type 1-Type 6 system has been
superseded by the modular approach, a correlation table will be available.
In the previous ISO 16602 (and EN equivalents EN 13034, EN 14605, EN 943 series, EN 1073 series, and
EN 14325), there is a link between the garment tests, the Type (Type 1 through Type 6), and the physical
and chemical requirements of materials and components. This revision of the ISO 16602 series (intended
to be an EN ISO standard), applies a modular approach that breaks that link. Nevertheless, the existing test
methods from ISO 16602 and in other European standards (e.g EN 14325:2018) have been used as the basis
for this revision.
The selection of appropriate chemical protective clothing should be based on a risk assessment. In this
assessment the user organization identifies the hazards, and determines:
— the potential for chemical contact with individual workers,
— the consequences of exposure, and
— the type of practices or controls needed to eliminate or minimize exposure.
When it is determined that chemical protective clothing is needed, the risk assessment should identify
the chemical protective clothing required in terms of its overall performance requirements from physical
characteristics, chemical protection and garment test perspective. ISO/DIS 16602-6 is intended to assist
user organizations with these determinations.

v
DRAFT International Standard ISO/DIS 16602-4:2025(en)
Protective clothing for protection against chemicals —
Classification, labelling and performance requirements —
Part 4:
Test methods, classification and requirements for specific
designs and ensemble components including gloves, footwear,
and respirators
1 Scope
This document specifies minimum design and functional performance requirements for protective clothing
against specified chemicals (including solids, airborne particles, aerosols, liquids, and gases (including
radioactive contamination)) in the workplace and unidentified chemicals in emergency situations. These
requirements cover all relevant parts of the ensemble which are attached/fitted to the chemical protective
clothing, for example garment, visor, gloves, boots or bootees, ventilation (non-breathing), and other design
features.
This document does not specifically address protection against biological, thermal (flame, heat or cold), and
ionizing radiation hazards as specific requirements are covered by other relevant standards.
This type of equipment is not intended for immersion in liquids.
The basic performance criteria for the components such as gloves, boots or respiratory protective equipment
are given in other standards. Supplementary requirements are provided in this standard.
Chemicals such as violently air sensitive reagents, unstable explosives and cryogenic liquids have not been
considered since protection against these additional hazards is beyond the scope of this standard.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 11610:2023, Protective clothing — Vocabulary
1)
ISO/DIS 16602-1:—, , , Protective clothing for protection against chemicals — Classification, labelling and
performance requirements — Part 1: General requirements
2)
ISO/DIS 16602-2:—, , , Protective clothing for protection against chemicals — Classification, labelling and
performance requirements — Part 2: Physical test methods, classification and requirements
3)
ISO/DIS 16602-3:—, , , Protective clothing for protection against chemicals — Classification, labelling and
performance requirements — Part 3: Chemical test methods, classification and requirements
1) Under preparation. Stage at the time of publication: ISO/DIS 16602-1:2025
2) Under preparation. Stage at the time of publication: ISO/DIS 16602-2:2025
3) Under preparation. Stage at the time of publication: ISO/DIS 16602-2:2025

ISO/DIS 16602-4:2025(en)
4)
ISO/DIS 16602-5:—, , , Protective clothing for protection against chemicals — Classification, labelling and
performance requirements — Part 5: Garment test methods, classification and requirements
ISO 16900-1:2019, Respiratory protective devices — Methods of test and test equipment — Part 1: Determination
of inward leakage
ISO 17420-1, Respiratory protective devices — Performance requirements — Part 1: General
ISO 17420-5:2021, Respiratory protective devices — Performance requirements — Part 5: Special application
fire and rescue services - Supplied breathable gas RPD and filtering RPD
ISO/TS 17420-9:2021, Respiratory protective devices — Performance requirements — Part 9: Special
application chemical, biological, radiological and nuclear (CBRN) supplied breathable RPD
ISO 17491-1:2012, Protective clothing — Test methods for clothing providing protection against chemicals —
Part 1: Determination of resistance to outward leakage of gases (internal pressure test)
ISO 20345:2021, Personal protective equipment — Safety footwear
ISO 20345:2021/Amd1:2024, Personal protective equipment — Safety footwear
ISO 23388:2018, Protective gloves against mechanical risks
IEC 67672-1, Electroacoustics - Sound level meters — Part 1: Specifications
3 Terms and definitions
For the purposes of this document, the terms and definitions in ISO 11610 and the following apply (see also
Annex A).
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
3.1
chemical protective ensemble
chemical protective garment and all relevant items required to protect against the chemical risk
Note 1 to entry: Examples for relevant items are visor, gloves, boots or bootees, RPD, ventilation (non-breathing), and
other design features.
3.2
chemical protective footwear/chemical safety footwear
footwear, whether integral to the garment or not, incorporating safety features to protect the wearer from
injuries that could arise through accidents
3.2.1
chemical protective overshoe/overboot
footwear, not integral to the garment, incorporating safety features to protect the wearer and worn over the
sock/bootee
3.2.2
chemical protective sock/bootee
sock like extension of the chemical protective suit. Sock or bootee are an integral part of the chemical
protective garment.
Note 1 to entry: The bootee may or may not be made of the same material used in the construction of the chemical
protective suit.
4) Under preparation. Stage at the time of publication: ISO/DIS 16602-2:2025

ISO/DIS 16602-4:2025(en)
3.3
chemical protective garment
single article of protective clothing, worn to provide protection to the skin against exposure to or contact
with chemicals, which covers or replaces personal garment(s)
3.4
chemical protective suit
garment worn to protect against chemicals that covers the whole, or greater part of the body
Note 1 to entry: A chemical protective suit may comprise of garments combined together to provide protection to the
body. A suit may also have various types of additional protection such as hood or helmet, boots and gloves joined with it.
[SOURCE: ISO 11610:2023, 7.2.2]
3.5
component
part or sub-assembly of a protective item necessary for it to meet its respective requirements
3.5.1
attached components
components such as but not limited to gloves and boots that can be connected, by design, to the chemical
protective suit to create a chemical protective ensemble
3.5.2
attachable/detachable components
components such as but not limited to gloves and boots that can be temporarily attached (for example by
taping), by a procedure described by the manufacturer in the user instructions, to the chemical protective
suit to create a chemical protective ensemble
4 General requirements for garments and ensembles
4.1 General
The requirements below cover components and their interrelation with various parts of the ensemble that
fall under this series of documents.
These types of garment and ensembles (including seams and assemblages) are not intended for immersion
in liquids, nor are they tested under immersion conditions.
All the garments shall meet the minimum physical and chemical ingress requirements according to
ISO/DIS 16602-1:— (5 and 6).
The garment or ensemble integrity shall be tested and ascertained using the garment test as described in
ISO/DIS 16602-5 in association with one or more practical performance tests. The interfaces of a garment
or ensemble shall be examined, when additional PPE to the garment is worn, to ensure that the wearer’s
body is fully covered throughout a single of the practical performance tests or a series of such tests (see
ISO/DIS 16602-1 and ISO/DIS 16602-5).
The modules of the garment tests, as described this document and in ISO/DIS 16602-5, are not intended
to be hierarchical, but define different protection levels by the form of the chemical risk (gas or liquid, or
particulate) and in the case of liquid by the intensity and quantity of the spray.
If the manufacturer's instructions require or indicate that any interfaces between different components of
an ensemble should be taped (such as at wrists and ankles) then testing shall be carried out with tape applied
(see details in Manufacturer’s Instructions (IFU), ISO/DIS 16602-1:— (11.1 (c)) and ISO/DIS 16602-5:— (6.1).
NOTE As taping is more difficult depending on the garment design, specialist/manufacturer training may be
required. If tape specific to the garment is required to achieve the requirements, this information is important for the IFU.

ISO/DIS 16602-4:2025(en)
4.2 Vapour/gas resistant design
The vapour/gas resistant design shall only include ensembles that meet one of the following requirements:
1. Totally encapsulating one-piece suits that cover the whole body including the head, the hands and the
feet, and the respiratory system.
NOTE This includes suits with a breathing air supply that is independent of the ambient atmosphere worn inside
the suit, or suits with an external source of breathable air providing positive pressure inside the suit.
2. Totally encapsulating one-piece suits that cover the whole body including the hands and the feet but
not the respiratory interface. Such suits shall have a permanent or non-permanent seal between the
respiratory interface and the rest of the garment.
NOTE This includes suits with a breathing air supply that is independent of the ambient atmosphere worn outside
the suit.
If the face-piece is attached to the garment in a non-permanent manner the seal between the face-piece
and garment shall also be tested in accordance with ISO/DIS 16602-5 (6.4.2.2). The total stain area on the
undergarment shall be less than three times the calibrated stain area. The test shall be carried out from
both the front and the rear. Such garments shall be tested according to 4.3 and shall meet a mean value of
the total inward leakage classification of 0,05 % or better (Class 7, see Table 1).
The vapour/gas resistant design shall be tested according to the garment test requirements in
ISO/DIS 16602-5:— (6.2) and meet the following: “rigorous test method”. The complete suit shall be tested
according to ISO 17491-1:2012, Method 2. The pressure drop during the course of the 6-minute test shall not
be greater than 300 Pa (3 mbar).
For garments without integral visor, full face-piece(s), complying with ISO 17420-1, shall be used. No other
respiratory interfaces are allowed.
The closure assembly shall be strength tested according to ISO/DIS 16602-2:— (5.7).
For closure systems including a flap, the flap shall be designed such that it fully covers all zipper components
and is secured to the fabric of the garment (e.g. touch and close fastener or alternative closure mechanism)
to prevent liquid ingress. The flap shall be tested using the garment liquid jet resistance design test of sub-
clause 4.4. Visual inspection shall check that liquid has not penetrated the flap enabling it to potentially rest
on top of the zipper (see ISO/DIS 16602-3:— (10.4.4)). In case of failure, the closure system shall be tested for
permeation.
For ET chemicals pressure tight design, the permeation for the zippers (ISO/DIS 16602-3:— (10.4.4) shall be
required not only for gases but also for liquids even when there is a flap.
The outside of the pressure-tight chemical protective garment shall not have any pockets or features similar
to pockets. Pockets and/or features inside the pressure-tight chemical protective garment are allowed.
Three ensembles shall be tested.
These garments shall be marked according to ISO/DIS 16602-1:— (Annex B, Figure B.1.1).
4.3 Inward-leakage and particulate resistant design
The inward-leakage and particulate resistant design shall only include ensembles that meet one of the
following requirements:
1. Garments and ensembles designs listed in 4.2,
2. One-piece garments as in 1. above but with potentially separate hood, gloves and/or boots.
The inward-leakage and particulate resistant design shall be tested according to the garment test
requirements in ISO/DIS 16602-5:— (6.3). If the garment provides chemical protection in addition to
particulate protection, the garment shall meet the permeation requirement described in ISO/DIS 16602-1:—
(6) and of ISO/DIS 16602-3:— (6).

ISO/DIS 16602-4:2025(en)
Inward leakage and particulate test results of the protective clothing shall be classified according to Table 1
below based on the mean value for all activities (%). For air-supplied clothing the air shall be supplied at the
minimum design air flow rate:
Table 1 — inward leakage classes
Class Requirement Requirement Nominal protection Chemical
M & M factor
TIL & TIL R B Challenge
R B
(%)
(%)
11 ≤ 0,004 ≤ 0,002 50 000 SF6 or NaCl
10 ≤ 0,01 ≤ 0,005 20 000 SF6 or NaCl
9 ≤ 0,02 ≤ 0,01 10 000 SF6 or NaCl
8 ≤ 0,04 ≤ 0,02 5 000 SF6 or NaCl
7 ≤ 0,1 ≤ 0,05 2 000 SF6 or NaCl
6 ≤ 0,2 ≤ 0,1 1 000 SF6 or NaCl
5 ≤ 2 ≤ 1 100 SF6 or NaCl
4 ≤ 4 ≤ 2 50 SF6 or NaCl
3 ≤ 10 ≤ 5 20 SF6 or NaCl
2 ≤ 20 ≤ 10 10 SF6 or NaCl
1 ≤ 50 ≤ 25 4 SF6 or NaCl
NOTE
M or M are given in Annex CISO/DIS 16602-5
R B
MR : Mean values of TIL for all the activities in the respiratory area
MB : Mean values of TIL for all the activities in the body excluding the respiratory area
The limit of detection in the test lab shall be at least a factor 10 lower than the class requirement, other than
for the Classes 10 and 11 where the factors shall be at least 5 and 2, respectively.
Eight samples shall be tested on four test subjects (if more than one size of the garment is available, at least
two different sizes shall be used on subjects of different sizes), two garments per test subject.
The test shall be carried out according to ISO/DIS 16602-5:— (6.3, Annex C).
These garments shall be marked according to ISO/DIS 16602-1:— (Annex B, Figure B.1.2).
The outside of the inward-leakage and particulate resistant garment shall not have any pockets or features
similar to pockets. Pockets and/or features inside the inward-leakage and particulate resistant garment are
allowed.
NOTE 2 Particulate counters are sometimes clipped to a garment using “open” pockets (i.e. pockets that cannot
cumulate particulates as they are open at the bottom). The “open” pocket should not be considered as a pocket.
Particulate protection is limited to physical penetration of the particulates only.
4.4 Liquid resistant designs
4.4.1 General
The liquid resistant design shall only include garments or ensembles that meet one of the following
requirements:
1. Garments and ensembles designs listed in 4.3;
2. Ensembles of partial-body protective garments that between them cover the
...