EN ISO 12185:2024

Crude petroleum, petroleum products and related products - Determination of density - Laboratory density meter with an oscillating U tube sensor (ISO 12185:2024)

This document specifies a method for the determination, using an oscillating U-tube density meter, of the density of crude petroleum and related products within the range 600 kg/m3 to 1 100 kg/m3, which can be handled as single-phase liquids at the test temperature and pressure.
This document is applicable to liquids of any vapour pressure as long as suitable precautions are taken to ensure that they remain in single phase. Loss of light components leads to changes in density during both the sample handling and the density determination.
This method is not intended for use with in-line density meters.

Rohöl und Mineralölerzeugnisse - Bestimmung der Dichte - U‑Rohr‑Oszillationsverfahren (ISO 12185:2024)

Dieses Dokument legt ein Verfahren zur Bestimmung der Dichte von Rohöl und verwandten Produkten im Bereich zwischen 600 kg/m3 und 1 100 kg/m3, die bei der Prüftemperatur und bei dem Prüfdruck als einphasige Flüssigkeiten gehandhabt werden können, mit einem U-Rohr-Schwingungs-Dichtemessgerät fest.
Dieses Dokument ist auf Flüssigkeiten mit beliebigem Dampfdruck anwendbar, sofern geeignete Sicherheitsvorkehrungen ergriffen werden, um sicherzustellen, dass die Flüssigkeiten einphasig bleiben. Ein Verlust von leichtflüchtigen Bestandteilen sowohl während der Handhabung der Proben als auch bei der Dichtebestimmung führt zu einer veränderten Dichte.
Dieses Verfahren ist nicht zur Anwendung auf Durchfluss-Dichtemessgeräte vorgesehen.

Pétroles bruts, produits pétroliers et produits connexes - Détermination de la masse volumique - Appareil de masse volumique de laboratoire à capteur à tube en U oscillant (ISO 12185:2024)

Le présent document spécifie une méthode pour la détermination, au moyen d'un appareil de masse volumique à tube en U oscillant, de la masse volumique des pétroles bruts et produits connexes qui sont des liquides monophasés à la température et à la pression d'essai dans la plage de masses volumiques comprises entre 600 kg/m3 et 1 100 kg/m3.
Le présent document s'applique aux liquides de n'importe quelle tension de vapeur, sous réserve de prendre les précautions appropriées pour s'assurer que ces liquides restent à l'état monophasé. La perte de composants légers conduit à des changements de masse volumique à la fois au cours de la manipulation des échantillons et au cours de la détermination de la masse volumique.
La présente méthode n'est pas destinée à être utilisée avec des appareil de masse volumique en ligne.

Surova nafta, naftni in sorodni proizvodi - Določanje gostote - Laboratorijski merilnik gostote z oscilirajočo U-cevko (ISO 12185:2024)

Ta dokument določa metodo za določanje gostote surove nafte in sorodnih proizvodov v razponu od 600 kg/m3 do 1100 kg/m3, s katerimi je mogoče ravnati kot z enofaznimi tekočinami pri preskusni temperaturi in tlaku; pri tem postopku se uporabi merilnik gostote z oscilirajočo U-cevko.
Dokument se uporablja za tekočine s katerim koli parnim tlakom, če je z ustreznimi ukrepi zagotovljena njihova enofaznost. Zaradi izgube lahkih komponent prihaja do sprememb v gostoti tako med ravnanjem z vzorci kot določanjem gostote.
Ta metoda ni namenjena za uporabo z merilniki gostote s serijskimi priključki.

General Information

• Status: Published
• Publication Date: 26-Mar-2024
• ICS: 75.180.30 - Volumetric equipment and measurements
• Technical Committee: CEN/TC 19 - Petroleum products, lubricants and related products
• Drafting Committee: CEN/TC 19 - Petroleum products, lubricants and related products
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 27-Mar-2024
• Completion Date: 27-Mar-2024
• Ref Project: SIST EN ISO 12185:2024 - Crude petroleum, petroleum products and related products - Determination of density - Laboratory density meter with an oscillating U tube sensor (ISO 12185:2024)

Relations

• Replaces: EN ISO 12185:1996 - Crude petroleum and petroleum products - Determination of density - Oscillating U-tube method (ISO 12185:1996)
• Effective Date: 18-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2024
Nadomešča:
SIST EN ISO 12185:1998
Surova nafta, naftni in sorodni proizvodi - Določanje gostote - Laboratorijski
merilnik gostote z oscilirajočo U-cevko (ISO 12185:2024)
Crude petroleum, petroleum products and related products - Determination of density -
Laboratory density meter with an oscillating U tube sensor (ISO 12185:2024)
Rohöl und Mineralölerzeugnisse - Bestimmung der Dichte - U-Rohr-Oszillationsverfahren
(ISO 12185:2024)
Pétroles bruts, produits pétroliers et produits connexes - Détermination de la masse
volumique - Densimètre de laboratoire à capteur à tube en U oscillant (ISO 12185:2024)
Ta slovenski standard je istoveten z: EN ISO 12185:2024
ICS:
75.040 Surova nafta Crude petroleum
75.080 Naftni proizvodi na splošno Petroleum products in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 12185
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2024
EUROPÄISCHE NORM
ICS 75.180.30 Supersedes EN ISO 12185:1996
English Version
Crude petroleum, petroleum products and related
products - Determination of density - Laboratory density
meter with an oscillating U tube sensor (ISO 12185:2024)
Pétroles bruts, produits pétroliers et produits Rohöl und Mineralölerzeugnisse - Bestimmung der
connexes - Détermination de la masse volumique - Dichte - U-Rohr-Oszillationsverfahren (ISO
Appareil de masse volumique de laboratoire à capteur 12185:2024)
à tube en U oscillant (ISO 12185:2024)
This European Standard was approved by CEN on 23 February 2024.

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, Türkiye 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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 12185:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 12185:2024) has been prepared by Technical Committee ISO/TC 28 "Petroleum
and related products, fuels and lubricants from natural or synthetic sources" in collaboration with
Technical Committee CEN/TC 19 “Gaseous and liquid fuels, lubricants and related products of
petroleum, synthetic and biological origin” the secretariat of which is held by NEN.
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 September 2024, and conflicting national standards
shall be withdrawn at the latest by September 2024.
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 12185:1996.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 12185:2024 has been approved by CEN as EN ISO 12185:2024 without any modification.

International
Standard
ISO 12185
Second edition
Crude petroleum, petroleum
2024-03
products and related products —
Determination of density —
Laboratory density meter with an
oscillating U-tube sensor
Pétroles bruts, produits pétroliers et produits connexes —
Détermination de la masse volumique — Appareil de masse
volumique de laboratoire à capteur à tube en U oscillant
Reference number
ISO 12185:2024(en) © ISO 2024
ISO 12185:2024(en)
© 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
ii
ISO 12185:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 3
5 Apparatus . 3
5.1 Density meter .3
5.2 Homogenizer .3
5.3 Constant-temperature bath .3
6 Reagents and materials . 3
6.1 Flushing solvent .3
6.2 Adjustment liquids .4
7 Sampling . 4
8 Sample preparation . 5
9 Apparatus preparation . 5
9.1 Test temperature .5
9.2 Cell cleaning .5
9.3 Meter verification and adjustment .6
9.4 Meter calibration .6
9.5 Quality control checks .6
10 Test procedure . 6
11 Calculation . 7
12 Test report . 7
13 Precision . 7
13.1 Repeatability, r.7
13.2 Reproducibility, R .8
Annex A (informative) Meter calibration . 9
Bibliography .11

iii
ISO 12185:2024(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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 28, Petroleum and related products, fuels
and lubricants from natural or synthetic sources, Subcommittee SC 2, Measurement of petroleum and related
products, in collaboration with the European Committee for Standardization (CEN) Technical Committee
CEN/TC 19, Gaseous and liquid fuels, lubricants and related products of petroleum, synthetic and biological origin,
in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 12185:1996), which has been technically
revised. It also incorporates the Technical Corrigendum ISO 12185:1996/Cor 1:2001.
The main changes are as follows:
— definitions have been added in Clause 3;
— a quality control (QC) check has been added in 9.5.
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 12185:2024(en)
Introduction
The first edition of this standard (ISO 12185:1996) was written at a time when there were relatively few
models of density meter with an oscillating U-tube sensor on the market.
There are now a considerable number of different manufacturers and models of laboratory density meter
available worldwide, many of which use different methodologies or algorithms to cope with the effect of
viscosity on displayed density.
This document therefore encompasses a wider range of instruments than those covered in the first edition
and gives guidance and requirements for accurate density analyses, such as apparatus and apparatus
preparation (see Clauses 5 and 9, Annex A).

v
International Standard ISO 12185:2024(en)
Crude petroleum, petroleum products and related
products — Determination of density — Laboratory density
meter with an oscillating U-tube sensor
1 Scope
This document specifies a method for the determination, using an oscillating U-tube density meter, of the
3 3
density of crude petroleum and related products within the range 600 kg/m to 1 100 kg/m , which can be
handled as single-phase liquids at the test temperature and pressure.
This document is applicable to liquids of any vapour pressure as long as suitable precautions are taken to
ensure that they remain in single phase. Loss of light components leads to changes in density during both
the sample handling and the density determination.
This method is not intended for use with in-line density meters.
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 91, Petroleum and related products — Temperature and pressure volume correction factors (petroleum
measurement tables) and standard reference conditions
ISO 3015, Petroleum and related products from natural or synthetic sources — Determination of cloud point
ISO 3016, Petroleum and related products from natural or synthetic sources — Determination of pour point
ISO 3170, Petroleum liquids — Manual sampling
ISO 3171, Petroleum liquids — Automatic pipeline sampling
IP 389: Determination of wax appearance temperature (WAT) of middle distillate fuels by differential thermal
analysis (DTA) or differential scanning calorimetry (DSC)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
density
ρ
mass of liquid per unit volume at a specified temperature
Note 1 to entry: This is usually the mass of liquid expressed in kilograms, divided by its volume, expressed in cubic
−3 3
metres. The unit of measurement can be displayed as either kg·m or kg/m . When quoting liquid density, the
temperature at which it has been measured shall also be quoted (e.g. 840,0 kg/m at 20,1 °C).

ISO 12185:2024(en)
3 3
Note 2 to entry: The SI unit of density is kg/m ; the derived unit of measure g/cm is commonly used in some industries.
3.2
test temperature
temperature of the sample in the density meter cell
3.3
reference temperature
temperature at which the sample density (3.1) is reported
1)
Note 1 to entry: This temperature is normally either of 15 °C, 20 °C or 25 °C. Such a reference temperature is normally
stipulated by national authorities or by commercial agreement.
3.4
adjustment
set of operations carried out on a measuring system so that it provides prescribed indications corresponding
to given values of a quantity to be measured
Note 1 to entry: Most, but not all, laboratory density meters can be adjusted using water and either air or another liquid.
Note 2 to entry: Adjustment of a density meter should not be confused with calibration. After a meter has been
adjusted, it must be calibrated to find the error in the displayed density.
3.5
calibration
operation that, under specified conditions, in a first step, establishes a relation between the quantity values
with measurement uncertainties provided by measurement standards and corresponding indications with
associated measurement uncertainties and, in a second step, uses this information to establish a relation for
obtaining a measurement result from an indication
Note 1 to entry: A meter must be calibrated after it has been adjusted. One or more traceable liquid density standards
must be injected, and the displayed result compared with the certified density. This will give the calibration offset for
the meter.
3.6
verification
provision of objective evidence that a given item fulfils specified requirements
3.7
reference measurement standard
measurement standard designated for the calibration (3.5) of other measurement standards for quantities
of a given kind in a given organisation or at a given location
3.8
working measurement standard
measurement standard that is used routinely to calibrate or verify measuring instruments or measuring systems
Note 1 to entry: A working measurement standard is usually calibrated with respect to a reference measurement
standard (3.7).
Note 2 to entry: In relation to verification, the terms “check standard” or “control standard” are also sometimes used.
3.9
liquid density standard
reference material, ac
...