EN ISO 374-4:2019

Protective gloves against dangerous chemicals and micro-organisms - Part 4: Determination of resistance to degradation by chemicals (ISO 374-4:2019)

This document specifies the test method for the determination of the resistance of protective glove materials to degradation by dangerous chemicals with continuous contact.
NOTE       Annex A gives information on interlaboratory test results on this method.
It is preferable that other tests used in addition to the evaluation of chemical resistance such as permeation resistance and penetration, as the chemical test do not provide sufficient information on the physical property changes affecting a glove during exposure to a chemical. It is necessary that the outside surface of the glove be exposed to the chemical.

Schutzhandschuhe gegen gefährliche Chemikalien und Mikroorganismen - Teil 4: Bestimmung des Widerstandes gegen Degradation durch Chemikalien (ISO 374 4:2019)

Dieses Dokument legt das Prüfverfahren für die Bestimmung des Widerstands von Werkstoffen für Schutzhandschuhe gegen Degradation durch gefährliche Chemikalien bei ständigem Kontakt fest.
ANMERKUNG   Anhang A enthält Informationen zu den Ergebnissen aus Labor Ringversuchen mit diesem Verfahren.
Es ist empfehlenswert, zusätzlich zur Beurteilung des chemischen Widerstands andere Prüfungen wie etwa Widerstand gegen Permeation und Widerstand gegen Penetration zu nutzen, weil die Chemikalienprüfung nicht ausreichend Informationen zu den Veränderungen der physikalischen Eigenschaften, die einen Handschuh während der Beanspruchung durch eine Chemikalie beeinflussen, bietet. Die Oberfläche der Außenseite des Handschuhs muss der Chemikalie ausgesetzt werden.

Gants de protection contre les produits chimiques dangereux et les micro-organismes - Partie 4: Détermination de la résistance à la dégradation par des produits chimiques (ISO 374-4:2019)

Le présent document spécifie la méthode d'essai pour la détermination de la résistance des matériaux des gants de protection à la dégradation par contact continu avec des produits chimiques dangereux.
NOTE       L'Annexe A donne des informations sur les résultats de l'essai interlaboratoires sur cette méthode.
Il est préférable que d'autres essais, tels que la résistance à la perméation et la résistance à la pénétration, soient utilisés en plus de l'évaluation de la résistance chimique car l'analyse chimique ne fournit pas suffisamment d'informations sur les changements de propriétés physiques affectant un gant lors d'une exposition à un produit chimique. Il est nécessaire que la surface extérieure du gant soit exposée au produit chimique.

Varovalne rokavice za zaščito pred nevarnimi kemikalijami in mikroorganizmi - 4. del: Ugotavljanje odpornosti proti razkroju zaradi kemikalij (ISO 374-4:2019)

Ta dokument določa preskusno metodo za določanje odpornosti materialov varovalnih rokavic proti razgradnji zaradi stalnega stika z nevarnimi kemikalijami.

General Information

• Status: Published
• Publication Date: 22-Oct-2019
• Withdrawal Date: 29-Apr-2020
• ICS: 13.340.40 - Hand and arm protection
• Technical Committee: CEN/TC 162 - Protective clothing including hand and arm protection and lifejackets
• Drafting Committee: CEN/TC 162/WG 8 - Protective gloves
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 23-Oct-2019
• Due Date: 16-Jul-2020
• Completion Date: 23-Oct-2019
• Directive: 2016/425 - Regulation (EU) 2016/425 of the European Parliament and of the Council of 9 March 2016 on personal protective equipment and repealing Council Directive 89/686/EEC
• Directive: 89/686/EEC - Council Directive 89/686/EEC of 21 December 1989 on the approximation of the laws of the Member States relating to personal protective equipment
• Mandate: M/031 - Standardization mandate to CEN/CENELEC concerning standards for Personal Protective Equipment
• Ref Project: SIST EN ISO 374-4:2020 - Protective gloves against dangerous chemicals and micro-organisms - Part 4: Determination of resistance to degradation by chemicals (ISO 374-4:2019)

Relations

• Replaces: EN 374-4:2013 - Protective gloves against chemicals and micro-organisms - Part 4: Determination of resistance to degradation by chemicals
• Effective Date: 30-Oct-2019

Overview

EN ISO 374-4:2019 - Protective gloves against dangerous chemicals and micro-organisms - Part 4: Determination of resistance to degradation by chemicals (ISO 374-4:2019) specifies a laboratory test method to determine how glove materials degrade after continuous contact with liquid chemicals. The method quantifies changes in the glove material’s puncture resistance after exposure and is intended for natural and synthetic polymer gloves. Annex A provides interlaboratory information and Annex B gives an informative weight-change test example.

Key topics and technical requirements

• Purpose: Measure resistance to chemical-induced degradation by comparing puncture resistance before and after exposure to a challenge chemical.
• Test principle: Continuous contact of the glove’s outer surface with the chemical in a sealed vial; change in puncture force is the metric of degradation.
• Sampling and specimens: Three gloves selected and conditioned (23 ± 2 °C, 50 ± 5 % RH), cut into 20 mm circular specimens (18 specimens total: 9 exposed, 9 unexposed).
• Apparatus and components: 20 ml crimp-top vials, 20 mm septa and crimp seals, punched sample holder, dynamometer with puncture stylus per ISO 23388:2018, transfer pipette, and vial support.
• Test conditions: Tests performed at (23 ± 2) °C; exposure typically about 1 hour (±5 min) with ~2 ml challenge chemical per vial; puncture testing at 100 mm/min carriage speed.
• Limitations: Lined gloves can produce unusable results if liners interfere with sealing or measurement; for multi-layer or irregular constructions, representative areas must be chosen.
• Complementary testing: The standard notes that chemical-degradation testing should be used alongside permeation and penetration tests because degradation alone may not reflect all changes in protective performance.

Applications and who uses this standard

• PPE manufacturers - to evaluate and document material durability and chemical compatibility during product development and quality control.
• Independent test laboratories - to perform standardized degradation tests for compliance, comparison and certification support.
• Occupational health & safety professionals and procurement teams - to select gloves with demonstrated resistance to degradation for specific chemical handling tasks.
• Regulators and conformity assessment bodies - to assess performance claims and support labeling under the ISO 374 series.

Related standards

• ISO 374-1 - terminology and performance requirements for chemical risks
• ISO 21420 - general requirements and test methods for protective gloves
• ISO 23388:2018 - puncture testing / mechanical test details used by this method
• Part of the broader ISO 374 series (chemical and microorganism protection).

Keywords: EN ISO 374-4:2019, protective gloves, resistance to degradation, chemical resistance test, puncture resistance test, continuous contact, glove materials.

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2020
Nadomešča:
SIST EN 374-4:2014
Varovalne rokavice za zaščito pred nevarnimi kemikalijami in mikroorganizmi - 4.
del: Ugotavljanje odpornosti proti razkroju zaradi kemikalij (ISO 374-4:2019)
Protective gloves against dangerous chemicals and micro-organisms - Part 4:
Determination of resistance to degradation by chemicals (ISO 374-4:2019)
Schutzhandschuhe gegen Chemikalien und Mikroorganismen - Teil 4: Bestimmung des
Widerstandes gegen Degradation durch Chemikalien (ISO 374-4:2019)
Gants de protection contre les produits chimiques dangereux et les micro-organismes -
Partie 4: Détermination de la résistance à la dégradation par des produits chimiques
(ISO 374-4:2019)
Ta slovenski standard je istoveten z: EN ISO 374-4:2019
ICS:
13.340.40 Varovanje dlani in rok Hand and arm protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 374-4
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2019
EUROPÄISCHE NORM
ICS 13.340.40 Supersedes EN 374-4:2013
English Version
Protective gloves against dangerous chemicals and micro-
organisms - Part 4: Determination of resistance to
degradation by chemicals (ISO 374-4:2019)
Gants de protection contre les produits chimiques Schutzhandschuhe gegen Chemikalien und
dangereux et les micro-organismes - Partie 4: Mikroorganismen - Teil 4: Bestimmung des
Détermination de la résistance à la dégradation par des Widerstandes gegen Degradation durch Chemikalien
produits chimiques (ISO 374-4:2019) (ISO 374-4:2019)
This European Standard was approved by CEN on 29 September 2019.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 374-4:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 374-4:2019) has been prepared by Technical Committee ISO/TC 94 "Personal
safety - Personal protective equipment" in collaboration with Technical Committee CEN/TC 162
“Protective clothing including hand and arm protection and lifejackets” the secretariat of which is held
by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by April 2020, and conflicting national standards shall be
withdrawn at the latest by April 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 374-4:2013.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 374-4:2019 has been approved by CEN as EN ISO 374-4:2019 without any modification.

INTERNATIONAL ISO
STANDARD 374-4
First edition
2019-10
Protective gloves against dangerous
chemicals and micro-organisms —
Part 4:
Determination of resistance to
degradation by chemicals
Gants de protection contre les produits chimiques dangereux et les
micro-organismes —
Partie 4: Détermination de la résistance à la dégradation par des
produits chimiques
Reference number
ISO 374-4:2019(E)
©
ISO 2019
ISO 374-4:2019(E)
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

ISO 374-4:2019(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test principles . 1
5 Test methods, puncture resistance test . 2
5.1 Sampling . 2
5.2 Apparatus . 2
5.3 Procedure . 3
5.3.1 Test conditions. 3
5.3.2 Pre-testing .
measurements. 3
5.3.3 Puncture testing . 4
5.3.4 Expression of results . 4
6 Test report . 5
Annex A (informative) Inter laboratory test on the present test method . 6
Annex B (informative) Weight change test . 7
ISO 374-4:2019(E)
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 on 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 the following
URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 94, Personal safety — Protective clothing
and equipment, Subcommittee SC 13, Protective clothing.
This document has been transferred from EN 374-4 without technical changes.
A list of all parts in the ISO 374 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 2019 – All rights reserved

INTERNATIONAL STANDARD ISO 374-4:2019(E)
Protective gloves against dangerous chemicals and micro-
organisms —
Part 4:
Determination of resistance to degradation by chemicals
1 Scope
This document specifies the test method for the determination of the resistance of protective glove
materials to degradation by dangerous chemicals with continuous contact.
NOTE Annex A gives information on interlaboratory test results on this method.
It is preferable that other tests used in addition to the evaluation of chemical resistance such as
permeation resistance and penetration, as the chemical test do not provide sufficient information on
the physical property changes affecting a glove during exposure to a chemical. It is necessary that the
outside surface of the glove be exposed to the chemical.
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 374-1, Protective gloves against dangerous chemicals and micro-organisms — Part 1: Terminology and
performance requirements for chemical risks
ISO 21420, Protective
...