SIST EN 4426:2020

SLOVENSKI STANDARD
SIST EN 4426:2020
01-maj-2020
Aeronavtika - Nekovinski materiali - Tekstilije - Preskusne metode - Določanje
prevodnosti in pH vodnih ekstraktov
Aerospace series - Non-metallic materials - Textiles - Test method - Determination of
conductivity and pH of aqueous extracts
Luft- und Raumfahrt - Nichtmetallische Werkstoffe - Textilien - Prüfverfahren -
Bestimmung der Leitfähigkeit und des pH-Werts in wässerigen Lösungen
Série aérospatiale - Matériaux non-métalliques - Textiles - Méthode d'essai -
Détermination de la conductivité et du pH des résidus aqueux
Ta slovenski standard je istoveten z: EN 4426:2020
ICS:
49.025.60 Tekstilije Textiles
SIST EN 4426:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 4426:2020

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SIST EN 4426:2020


EN 4426
EUROPEAN STANDARD

NORME EUROPÉENNE

February 2020
EUROPÄISCHE NORM
ICS 49.025.60
English Version

Aerospace series - Non-metallic materials - Textiles - Test
method - Determination of conductivity and pH of aqueous
extracts
Série aérospatiale - Matériaux non-métalliques - Luft- und Raumfahrt - Nichtmetallische Werkstoffe -
Textiles - Méthode d'essai - Détermination de la Textilien - Prüfverfahren - Bestimmung der
conductivité et du pH des extraits aqueux Leitfähigkeit und des pH-Werts in wässerigen
Lösungen
This European Standard was approved by CEN on 8 December 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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4426:2020 E
worldwide for CEN national Members.

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SIST EN 4426:2020
EN 4426:2020 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Health, safety and environment . 5
5 Principle/technique . 6
6 Resources . 6
7 Test samples/test pieces . 6
8 Test procedure . 7
9 Expression of results. 8
10 Calculation of pH . 8
11 Measurement uncertainties . 8
12 Designation . 8
13 Test report . 8

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SIST EN 4426:2020
EN 4426:2020 (E)
European foreword
This document (EN 4426:2020) has been prepared by the Aerospace and Defence Industries Association
of Europe — Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of
ASD, prior to its presentation to CEN.
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 August 2020, and conflicting national standards shall be
withdrawn at the latest by August 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.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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.

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SIST EN 4426:2020
EN 4426:2020 (E)
Introduction
This document is part of the series of EN non-metallic materials standards for aerospace applications.
The general organization of this series is described in EN 4385. This document is a level 3 document as
defined in EN 4385.
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SIST EN 4426:2020
EN 4426:2020 (E)
1 Scope
This document specifies the requirements for the determination of conductivity and pH of aqueous
extracts of textile materials.
This method has been written in response to an aerospace requirement for a method of extraction using
hot water as the EN 1413 requires only a cold water extraction method.
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 edi
...