ISO 23581:2024

Petroleum products and related products — Determination of kinematic viscosity — Method by Stabinger type viscometer

This document specifies a procedure for the determination of kinematic viscosity, ν, by calculation from dynamic viscosity, η, and density, ρ, of both transparent and opaque liquid petroleum products and crude oils using the Stabinger type viscometer. The result obtained using the procedure described in this document depends on the rheological behaviour of the sample. This document is predominantly applicable to liquids whose shear stress and shear rate are proportional (Newtonian flow behaviour). If the viscosity changes significantly with the shear rate, comparison with other measuring methods is not possible except at similar shear rates. The precision has been determined only for the materials, density ranges and temperatures described in Clause 13. The test method can be applied to a wider range of viscosity, density, temperature and materials. It is possible that the precision and bias are applicable for materials which are not listed in Clause 13.

Produits pétroliers et produits connexes — Détermination de la viscosité cinématique — Méthode avec un viscosimètre type Stabinger

Le présent document spécifie une méthode de détermination de la viscosité cinématique, ν, par calcul à partir de la viscosité dynamique, η, et de la masse volumique, ρ, des produits pétroliers liquides transparents et opaques et des huiles brutes à l'aide du viscosimètre de type Stabinger. Le résultat obtenu en utilisant la méthode décrite dans le présent document dépend du comportement rhéologique de l'échantillon. Ce document s'applique principalement à des liquides dont la contrainte de cisaillement et le taux de cisaillement sont proportionnels (comportement d'écoulement newtonien). Cependant, si la viscosité varie de manière significative avec le taux de cisaillement, une comparaison avec d'autres méthodes de mesure n'est pertinente qu'à des taux de cisaillement similaires. La fidélité a été déterminée pour les produits, les gammes de masse volumique et de température décrites à l'Article 13. La méthode d'essai peut être appliquée à une gamme plus large de viscosité, de masse volumique, de température et de produits. Il est possible que la fidélité et le biais puissent être applicables à des produits qui ne figurent pas à l’Article 13.

General Information

• Status: Published
• Publication Date: 13-May-2024
• ICS: 75.080 - Petroleum products in general
• Technical Committee: ISO/TC 28 - Petroleum and related products, fuels and lubricants from natural or synthetic sources
• Drafting Committee: ISO/TC 28 - Petroleum and related products, fuels and lubricants from natural or synthetic sources
• Current Stage: 6060 - International Standard published
• Start Date: 14-May-2024
• Due Date: 23-Feb-2024
• Completion Date: 14-May-2024

Relations

• Consolidates: ISO 29461-1:2021 - Air intake filter systems for rotary machinery — Test methods — Part 1: Static filter elements
• Effective Date: 12-Nov-2022
• Consolidates: ISO 3365:2016 - Indexable hardmetal (carbide) inserts with wiper edges, without fixing hole — Dimensions
• Effective Date: 06-Jun-2022
• Revises: ISO 23581:2020 - Petroleum products and related products — Determination of kinematic viscosity — Method by Stabinger type viscometer
• Effective Date: 06-Jun-2022

Standards Content (Sample)

International
Standard
ISO 23581
Second edition
Petroleum products and related
2024-05
products — Determination of
kinematic viscosity — Method by
Stabinger type viscometer
Produits pétroliers et produits connexes - Détermination de
la viscosité cinématique - Méthode avec un viscosimètre type
Stabinger
Reference number
ISO 23581:2024(en) © ISO 2024

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ISO 23581:2024(en)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2024
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]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland

© ISO 2024 – All rights reserved
ii

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ISO 23581:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Reagents and materials . 2
6 Apparatus . 3
7 Sampling and sample handling . 5
7.1 Sampling .5
7.2 Sample handling .5
7.2.1 General sample handling . .5
7.2.2 Conditioning of residual fuel oils .5
8 Calibration and verification . . 6
8.1 General .6
8.2 Instrument .6
9 Apparatus preparation . 7
10 Procedure . 7
10.1 Mea
...

Norme
internationale
ISO 23581
Deuxième édition
Produits pétroliers et produits
2024-05
connexes — Détermination de la
viscosité cinématique — Méthode
avec un viscosimètre type Stabinger
Petroleum products and related products — Determination of
kinematic viscosity — Method by Stabinger type viscometer
Numéro de référence
ISO 23581:2024(fr) © ISO 2024

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ISO 23581:2024(fr)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2024
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
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Publié en Suisse

© ISO 2024 – Tous droits réservés
ii

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ISO 23581:2024(fr)
Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Principe. 2
5 Réactifs et matériaux . 2
6 Appareillage . 3
7 Échantillonnage et manutention des échantillons . 5
7.1 Échantillonnage .5
7.2 Traitement des échantillons .5
7.2.1 Généralités pour le traitement des échantillons .5
7.2.2 Conditionnement des fuels résiduels .6
8 Étalonnage et vérification . 7
8.1 Généralités .7
8.2 Appareillage .7
9 Préparation de l'appareillage . 7
10 Mode opératoire . 8
10.1 Mesure.
...

FINAL DRAFT
International
Standard
ISO/FDIS 23581
ISO/TC 28
Petroleum products and related
Secretariat: NEN
products — Determination of
Voting begins on:
kinematic viscosity — Method by
2024-02-15
Stabinger type viscometer
Voting terminates on:
2024-04-11
Produits pétroliers et produits connexes - Détermination de la
viscosité cinématique - Méthode par viscosimètre type Stabinger
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 SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/CEN PARALLEL PROCESSING LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/FDIS 23581:2024(en) © ISO 2024

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FINAL DRAFT
ISO/FDIS 23581:2024(en)
International
Standard
ISO/FDIS 23581
ISO/TC 28
Petroleum products and related
Secretariat: NEN
products — Determination of
Voting begins on:
kinematic viscosity — Method by
Stabinger type viscometer
Voting terminates on:
Produits pétroliers et produits connexes - Détermination de la
viscosité cinématique - Méthode par viscosimètre type Stabinger
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
COPYRIGHT PROTECTED DOCUMENT
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2024
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/FDIS 23581:2024(en) © ISO 2024

© ISO 2024 – All rights reserved
ii

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ISO/FDIS 23581:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Reagents and materials . 2
6 Apparatus . 3
7 Sampling and sample handling . 5
7.1 Sampling .5
7.2 Sample handling .
...

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Secretariat: NEN
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Petroleum products and related products — Determination of
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kinematic viscosity — Method by Stabinger type viscometer
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Produits pétroliers et produits connexes —- Détermination de la viscosité cinématique —- Méthode avec lepar
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viscosimètre type Stabinger
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ISO/FDIS 23581:2023(E2024(en) Formatted: Font: 11 pt, Bold, Font color: Auto
Formatted: Font: 11 pt, Bold, Font color: Auto
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© ISO 20232024 Formatted: HeaderCentered
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All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
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may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
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or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
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ISO 20344, Personal protective equipment — Test methods
ISO copyright office for footwear
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Formatted: Default Paragraph Font
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© ISO 2024 – All rights reserved

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ISO/FDIS 23581:2023(E2024(en) Formatted: Font: 11 pt, Bold, Font color: Auto
Formatted: Font: 11 pt, Bold, Font color: Auto
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Contents
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Foreword . v
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Not at 0.71 cm
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Reagents and materials . 2
6 Apparatus . 3
7 Sampling and sample handling . 5
7.1 Sampling .
...