EN 17763:2022

SLOVENSKI STANDARD
01-december-2022
Centrifuge - Centrifuge za ladijska goriva - Določanje učinkovitosti ločevanja
delcev in certificirane stopnje pretoka (CFR) pod določenimi preskusnimi pogoji
Centrifuges - Marine fuel centrifuges - Determination of particle separation performance
and certified flow rate (CFR) under defined test conditions
Zentrifugen - Zentrifugen für Schiffskraftstoffe - Bestimmung der
Partikelabscheideleistung und der zertifizierten Durchflussrate (CFR) unter definierten
Testbedingungen
Centrifugeuses - Centrifugeuses à combustible pour la marine - Détermination des
performances de séparation des particules et du débit certifié (CFR) dans des conditions
d'essai définies
Ta slovenski standard je istoveten z: EN 17763:2022
ICS:
47.020.20 Ladijski motorji Marine engines and
propulsion systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17763
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2022
EUROPÄISCHE NORM
ICS 47.020.20; 47.020.30
English Version
Centrifuges - Marine fuel centrifuges - Determination of
particle separation performance and certified flow rate
(CFR) under defined test conditions
Centrifugeuses - Centrifugeuses à combustible pour la Zentrifugen - Zentrifugen für Schiffskraftstoffe -
marine - Détermination des performances de Bestimmung der Partikelabscheideleistung und der
séparation des particules et du débit certifié (CFR) zertifizierten Durchflussrate (CFR) unter definierten
dans des conditions d'essai définies Testbedingungen
This European Standard was approved by CEN on 29 August 2022.

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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17763:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Test arrangements . 6
4.1 Test equipment . 6
4.2 Test media . 8
4.2.1 Test oil specification . 8
4.2.2 Test oil kinematic viscosity . 8
4.2.3 Test oil density . 9
4.2.4 Test oil dispersing additive . 9
4.2.5 Test particle specification . 9
5 Performance test . 9
5.1 Oil viscosity . 9
5.2 Particle concentration . 9
5.3 Dispersing of particles into test medium . 9
5.4 Test sequence . 10
5.5 Test procedure . 10
5.6 Sampling . 10
5.7 Particle counting . 11
6 Analysis . 11
6.1 Calculation of separation efficiency . 11
6.2 Calculation of the 85 % efficiency point . 11
6.3 Correction of measured capacities . 12
6.4 Calculation of certified flow rate (CFR) . 13
7 CFR results for similar machines (scaling) . 13
8 Test report . 13
Annex A (informative) Dispersing the particles in the test medium . 14
Annex B (informative) Regeneration of test particle concentration . 15
Annex C (normative) Particle counting . 16
Annex D (informative) Example of correction of measured capacities . 27
Bibliography . 28

European foreword
This document (EN 17763:2022) has been prepared by Technical Committee CEN/TC 313 “Centrifuges”,
the secretariat of which is held by SIS.
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 2023, and conflicting national standards shall be
withdrawn at the latest by April 2023.
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.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the United
Kingdom.
Introduction
In general, diesel engines for propulsion of ships burn marine residual fuels. Marine residual fuels contain
the residue remaining after lighter fractions have been extracted from the crude oil during various
processes in the oil refinery. They are a blend of this heavy fraction to which other refinery stream
products are added to obtain the desired viscosity grade. Marine residual fuel oils contain elements
inherent to the product itself but they also contain some contaminants, which either are due to an
external contamination or enter into the fuel at the refinery during production, such as catalyst fines
which are small fragments of a catalyst, used in the catalytic cracking stage in order to cut long molecule
chains into smaller molecule chains. The catalyst fines are extremely hard and abrasive, and, if not
removed from marine residual fuel, can damage diesel engines with severe economic and, in extreme
cases, safety consequences. The normal way of removing catalyst fines and other contaminants from
marine residual fuel is by centrifugal separation.
It is important that all fuels are centrifuged efficiently to minimize the level of contaminants, including
catalyst fines.
In bunkered oil the maximum content of catalyst fines, expressed as the total content of Aluminium and
Silicon, is 60 mg/kg according to ISO 8217. Engine builders expect the level of catalyst fines to be reduced
to below 10 mg/kg, only reaching to 15 mg/kg for short amounts of time in the fuel entering the engine.
As the level of catalyst fines in the bunkered fuel is lowered, the engine builders expect a related reduction
in the amount of catalyst fines in the fuel entering the engine.
For many years there has been a demand from engine builders, ship builders, ship owners and
classification societies for reliable performance criteria for the centrifuges’ ability to remove abrasive
particles from marine residual fuels. The purpose of this document is to meet this demand by specifying
a repeatable method to determine separation performance with specific test particles in specific test oil.
1 Scope
This document specifies the procedure for the determination of the certified flow rate (CFR), a
performance parameter for centrifuges, at specific fuel oil viscosities using a defined test oil and a defined
test procedure.
This document is applicable to marine fuel centrifuges.
All values reported as CFR capacities are verified measured values on a defined CFR test bench.
Separation efficiency is determined by a defined particle counting method.
Scaling based on Stoke’s law and disc stack design is excluded from this document.
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.
EN ISO 3104, Petroleum products - Transparent and opaque liquids - Determination of kinematic viscosity
and calculation of dynamic viscosity (ISO 3104)
EN ISO 3675, Crude petroleum and liquid petroleum products - Laboratory determination of density -
Hydrometer method (ISO 3675)
EN ISO 3838, Crude petroleum and liquid or solid petroleum products - Determination of density or relative
density - Capillary-stoppered pyknometer and graduated bicapillary pyknometer methods (ISO 3838)
EN 60751, Industrial platinum resistance thermometers and platinum temperature sensors
EN ISO 12185, Crude petroleum and petroleum products - Determination of density - Oscillating U-tube
method (ISO 12185)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
separation efficiency
measure of a centrifuge's capability to remove test specific contaminants
Note 1 to entry: The separation efficiency, η, is calculated as follows:
η = 100 ∙ (1 – C /C ) (1)
out in
where
η is separation efficiency in %;
C is number of the test specific particles in cleaned test oil;
out
C is number of the test specific particles in test oil before centrifuge.
in
3.2
certified flow rate
CFR
rate of flow under defined conditions
Note 1 to entry: Certified flow rate is determined at a certain time after sludge discharge, at which the separation
efficiency of the centrifuge is 85 %, using a specific test oil and specific test particles under specific test conditions.
The certified flow rate is expressed in l/h.
3.3
density difference
difference of density between particles and oil
Note 1 to entry: Where the difference of density deviates from the nominal values, correction for the deviati
...