EN ISO 2431:2019
(Main)Paints and varnishes - Determination of flow time by use of flow cups (ISO 2431:2019, Corrected version 2019-09)
Paints and varnishes - Determination of flow time by use of flow cups (ISO 2431:2019, Corrected version 2019-09)
This document specifies a method for determining the flow time of paints, varnishes and related products that can be used to control consistency.
Four flow cups of similar dimensions, but having orifice diameters of 3 mm, 4 mm, 5 mm and 6 mm, are specified. Two methods for checking the flow cups for wear and tear are given (see Annex A).
Flow cups with a replaceable jet are not covered by this document as the close tolerances on the supply of the material under test to the jet are not met.
Commonly used dipping flow cups are also not covered by this document.
NOTE Since the fabrication tolerances for such flow cups are greater than those of the flow cups specified in this document, flow time determinations with dipping flow cups give a precision which is lower than that obtained with the flow cups specified in this document (see Clause 9).
The method described in this document is limited to testing materials for which the breakpoint of the flow from the orifice of the flow cup can be determined with certainty. This point is difficult to determine and reproduce for materials with flow times near the upper limit of the measurement range (100 s) due to slowing-down effects.
Beschichtungsstoffe - Bestimmung der Auslaufzeit mit Auslaufbechern (ISO 2431:2019)
Dieses Dokument legt ein Verfahren zum Bestimmen der Auslaufzeit von Beschichtungsstoffen und ähnlichen Produkten fest, das zum Prüfen der Konsistenz angewendet werden kann.
Es werden vier Auslaufbecher mit ähnlichen Maßen, jedoch mit unterschiedlichen Düsendurchmessern von 3 mm, 4 mm, 5 mm und 6 mm festgelegt. Zur Überprüfung der Auslaufbecher auf Abnutzung werden zwei Verfahren angegeben (siehe Anhang A).
Auslaufbecher mit auswechselbaren Düsen sind nicht Bestandteil dieses Dokumentes, da die engen Toleranzen der Auslaufdüsen nicht erfüllt werden.
Die allgemein verwendeten Tauchauslaufbecher sind nicht Bestandteil dieses Dokumentes.
ANMERKUNG Da die Toleranzen bei der Herstellung solcher Auslaufbecher im Allgemeinen größer als die Toleranzen der in diesem Dokument Norm festgelegten Auslaufbecher sind, ergeben die mit Tauchauslaufbechern ermittelten Auslaufzeiten eine geringere als die in diesem Dokument festgelegte Präzision (siehe Abschnitt 9).
Das in diesem Dokument festgelegte Verfahren ist auf die Prüfung von Stoffen, bei denen das Abreißen des aus der Düse des Auslaufbechers fließenden Flüssigkeitsfadens eindeutig festgestellt werden kann, begrenzt. Das Abreißen ist bei Stoffen mit Auslaufzeiten nahe der oberen Grenze des Messbereiches (100 s) wegen des langsamer werdenden Fließens schwierig festzustellen und zu reproduzieren.
Peintures et vernis - Détermination du temps d'écoulement au moyen de coupes d'écoulement (ISO 2431:2019, Version corrigée 2019-09)
Le présent document spécifie une méthode de détermination du temps d'écoulement des peintures, vernis et produits assimilés, utilisable pour contrôler leur consistance.
Quatre coupes d'écoulement de dimensions semblables mais ayant des orifices de 3 mm, 4 mm, 5 mm et 6 mm de diamètres sont spécifiées. Deux méthodes permettant de vérifier l'usure et la détérioration des coupes d'écoulement sont données (voir l'Annexe A).
Les coupes d'écoulement à ajutage ajustable ne sont pas couvertes par le présent document en raison du fait que les tolérances étroites relatives à l'alimentation en matériau soumis à l'essai de l'ajutage ne sont pas respectées.
Les coupes d'écoulement par plongée couramment utilisées ne sont également pas couvertes par le présent document.
NOTE Puisque les tolérances de fabrication de telles coupes d'écoulement sont supérieures à celles des coupes d'écoulement spécifiées dans le présent document, les déterminations de temps d'écoulement effectuées avec des coupes d'écoulement par plongée donnent une fidélité inférieure à celle obtenue avec les coupes d'écoulement spécifiées dans le présent document (voir Article 9).
La méthode décrite dans le présent document est limitée aux essais sur des matériaux dont il est possible de déterminer avec certitude le point de rupture de l'écoulement à l'orifice de la coupe. Ce point de rupture est difficile à déterminer et à reproduire pour les matériaux dont le temps d'écoulement est proche de la limite supérieure de la plage de mesurage (100 s) en raison d'effets de ralentissement.
Barve in laki - Ugotavljanje iztočnega časa z uporabo iztočnih čaš (ISO 2431:2019)
Ta dokument določa metodo za ugotavljanje iztočnega časa barv, lakov in povezanih izdelkov, ki jo je mogoče uporabljati za nadzor konsistence.
Določene so štiri iztočne čaše podobnih mer s premeri odprtin 3 mm, 4 mm, 5 mm in
6 mm. Opisani sta metodi za preverjanje obrabljenosti iztočnih čaš (glej dodatek A).
Ta dokument ne zajema iztočnih čaš z zamenljivo šobo, ker ozke tolerance za dovod
preskušanega materiala v šobo niso dosežene.
Prav tako ta dokument ne zajema pogosto uporabljenih potopnih iztočnih čaš.
OPOMBA: Ker so proizvodne tolerance za take iztočne čaše večje od toleranc iztočnih čaš iz
tega dokumenta, je ugotavljanje iztočnega časa s potopnimi iztočnimi čašami manj natančno od preskusov z iztočnimi čašami iz tega mednarodnega standarda (glej točko 9).
Metoda, ki je opisana v tem dokumentu, je omejena na preskušanje materialov, za katere je mogoče prekinitveno točko iztoka iz odprtine iztočne čaše natančno določiti. Za materiale z iztočnim časom blizu zgornje mejne vrednosti razpona merjenja (100 s) je to točko težko določiti, saj se rezultati zaradi upočasnjevanja običajno razlikujejo med ponovitvami.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2019
Nadomešča:
SIST EN ISO 2431:2012
Barve in laki - Ugotavljanje iztočnega časa z uporabo iztočnih čaš (ISO 2431:2019)
Paints and varnishes - Determination of flow time by use of flow cups (ISO 2431:2019)
Beschichtungsstoffe - Bestimmung der Auslaufzeit mit Auslaufbechern (ISO 2431:2019)
Peintures et vernis - Détermination du temps d'écoulement au moyen de coupes
d'écoulement (ISO 2431:2019)
Ta slovenski standard je istoveten z: EN ISO 2431:2019
ICS:
87.040 Barve in laki Paints and varnishes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 2431
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2019
EUROPÄISCHE NORM
ICS 87.040 Supersedes EN ISO 2431:2011
English Version
Paints and varnishes - Determination of flow time by use
of flow cups (ISO 2431:2019)
Peintures et vernis - Détermination du temps Beschichtungsstoffe - Bestimmung der Auslaufzeit mit
d'écoulement au moyen de coupes d'écoulement (ISO Auslaufbechern (ISO 2431:2019)
2431:2019)
This European Standard was approved by CEN on 11 June 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 2431:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 2431:2019) has been prepared by Technical Committee ISO/TC 35 "Paints and
varnishes" in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” 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 January 2020, and conflicting national standards shall
be withdrawn at the latest by January 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 ISO 2431:2011.
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 2431:2019 has been approved by CEN as EN ISO 2431:2019 without any modification.
INTERNATIONAL ISO
STANDARD 2431
Sixth edition
2019-06
Paints and varnishes — Determination
of flow time by use of flow cups
Peintures et vernis — Détermination du temps d'écoulement au
moyen de coupes d'écoulement
Reference number
ISO 2431:2019(E)
©
ISO 2019
ISO 2431:2019(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: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
ISO 2431:2019(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Temperature considerations . 2
5 Apparatus . 2
5.1 Flow cups . 2
5.1.1 Dimensions . 2
5.1.2 Material . 2
5.1.3 Construction . 2
5.1.4 Finish. 3
5.1.5 Measurement range . 4
5.1.6 Marking . 5
5.1.7 Care and checking of flow cups . 5
5.2 Supplementary apparatus . 6
6 Sampling . 6
7 Procedure. 6
7.1 Preliminary check for Newtonian flow . 6
7.2 Determination of flow time . 6
7.2.1 Choice of flow cup . 6
7.2.2 Temperature adjustment . 6
7.2.3 Preparation of the flow cup . 7
7.2.4 Filling the flow cup . . 7
7.2.5 Measurement of flow time . . 7
7.2.6 Repeat determinations . 7
8 Marking of products tested. 7
9 Precision . 8
9.1 General . 8
9.2 Repeatability limit, r . 8
9.3 Reproducibility limit, R . 8
10 Test report . 9
Annex A (normative) Checking flow cups for wear and tear .10
Annex B (informative) Conversion of flow times from one temperature to another .12
Bibliography .14
ISO 2431:2019(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 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 ISO/TC 35, Paints and varnishes, Subcommittee
SC 9, General test methods for paints and varnishes.
This
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.