EN ISO 12156-1:2016

SLOVENSKI STANDARD
01-maj-2016
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SIST EN ISO 12156-1:2006
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Diesel fuel - Assessment of lubricity using the high-frequency reciprocating rig (HFRR) -
Part 1: Test method (ISO 12156-1:2016)
Dieselkraftstoff - Methode zur Bestimmung der Schmierfähigkeit unter Verwendung eines
Schwingungsverschleiß-Prüfgerätes (HFRR) - Teil 1: Prüfverfahren (ISO 12156-1:2016)
Carburant diesel - Évaluation du pouvoir lubrifiant au banc alternatif à haute fréquence
(HFRR) - Partie 1: Méthode d'essai (ISO 12156-1:2016)
Ta slovenski standard je istoveten z: EN ISO 12156-1:2016
ICS:
75.160.20 7HNRþDJRULYD Liquid fuels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 12156-1
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2016
EUROPÄISCHE NORM
ICS 75.160.20 Supersedes EN ISO 12156-1:2006
English Version
Diesel fuel - Assessment of lubricity using the high-
frequency reciprocating rig (HFRR) - Part 1: Test method
(ISO 12156-1:2016)
Carburant diesel - Évaluation du pouvoir lubrifiant au Dieselkraftstoff - Methode zur Bestimmung der
banc alternatif à haute fréquence (HFRR) - Partie 1: Schmierfähigkeit unter Verwendung eines
Méthode d'essai (ISO 12156-1:2016) Schwingungsverschleiß-Prüfgerätes (HFRR) - Teil 1:
Prüfverfahren (ISO 12156-1:2016)
This European Standard was approved by CEN on 13 November 2015.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
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United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 12156-1:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
European foreword
This document (EN ISO 12156-1:2016) has been prepared by Technical Committee ISO/TC 22 "Road
vehicles" in collaboration 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 2016, and conflicting national standards
shall be withdrawn at the latest by September 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN ISO 12156-1:2006.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 12156-1:2016 has been approved by CEN as EN ISO 12156-1:2016 without any
modification.
INTERNATIONAL ISO
STANDARD 12156-1
Third edition
2016-02-01
Diesel fuel — Assessment of
lubricity using the high-frequency
reciprocating rig (HFRR) —
Part 1:
Test method
Carburant diesel — Évaluation du pouvoir lubrifiant au banc
alternatif à haute fréquence (HFRR) —
Partie 1: Méthode d’essai
Reference number
ISO 12156-1:2016(E)
©
ISO 2016
ISO 12156-1:2016(E)
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
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copyright@iso.org
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ii © ISO 2016 – All rights reserved

ISO 12156-1:2016(E)
Contents Page
Foreword .iv
Introduction .v
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 . 5
8 Preparation and calibration . 6
8.1 Preparation of apparatus . 6
8.1.1 Test plates and balls . 6
8.1.2 Hardware . 6
8.2 Calibration and correction . 6
8.2.1 Temperature . 6
8.2.2 Frequency . 6
8.2.3 Stroke length . 6
8.2.4 Test duration . 6
8.2.5 Test rig performance . 6
9 Test procedure . 7
10 Measurement of wear scar . 8
10.1 General . 8
10.2 Method “A” — Digital camera . 8
10.3 Method “B” — Visual observation . 8
11 Test results . 8
12 Precision . 9
12.1 General . 9
12.2 Repeatability, r .9
12.3 Reproducibility, R .9
13 Test report . 9
Annex A (informative) Measurement of HFRR wear scars .11
Annex B (informative) Major changes to the former edition of this part of ISO 12156 .14
Bibliography .15
ISO 12156-1:2016(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. www.iso.org/directives
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
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. 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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 34,
Propulsion, powertrain and powertrain fluids, in collaboration with Technical Committee ISO/TC 28,
Petroleum products and related products of synthetic or biological origin.
This third edition cancels and replaces the second edition (ISO 12156-1:2006), which has been
technically revised. Details of the major changes (additions, modifications and deletions) which affect
the performance of the products or the technical requirements applicable to the products are provided
for information in Annex B.
ISO 12156 consists of the following parts, under the general title Diesel fuel — Assessment of lubricity
using the high-frequency reciprocating rig (HFRR):
— Part 1: Test method
— Part 2: Limit
For the purposes of user feedback and making future improvements to this part of ISO 12156, we encourage
you to share your views. Please click on the link below to take part in the online survey.
https://www.surveymonkey.com/r/12156-1
iv © ISO 2016 – All rights reserved

ISO 12156-1:2016(E)
Introduction
All diesel fuel injection equipment has some reliance on diesel fuel as a lubricant. Wear due to excessive
friction resulting in shortened life of engine components, such as diesel fuel injection pumps and
injectors, has sometimes been ascribed to lack of lubricity in the fuel.
The relationship of test results to diesel injection equipment component distress due to wear has been
demonstrated for some fuel/hardware combinations where boundary lubrication is a factor in the
1)
operation of the component.
Test results from fuels tested to this procedure have been found to correlate with many fuel/hardware
combinations and provide an adequate prediction of the lubricating quality of the fuel. The correlation
of biodiesel blends has been validated through 15 years of field experience and anecdotal data.
This part of ISO 12156 includes content and data, with permission of ASTM International, from ASTM
[3] [1] [2]
Research Report RR:D02-1718 that is cited in ASTM D6079 and ASTM D7688.
1) NIKANJAM, Manuch, Teri CROSBY, Paul HENDERSON, Chris GRAY, Klaus MEYER, and Nick DAVENPORT, “ISO
Diesel Fuel Round Robin Program,” SAE Technical Paper No. 952372, 1995, ISSN 0148- 7191, doi: 10.4271/952372.
INTERNATIONAL STANDARD ISO 12156-1:2016(E)
Diesel fuel — Assessment of lubricity using the high-
frequency reciprocating rig (HFRR) —
Part 1:
Test method
WARNING — Application of this part of ISO 12156 may involve the use of hazardous materials,
operations and equipment. This part of ISO 12156 does not purport to address all of the safety
problems associated with its use. It is the responsibility of the user of this part of ISO 12156
to establish appropriate safety and health practices, and determine the applicable regulatory
limitations prior to use.
1 Scope
This part of ISO 12156 specifies a test method using the high-frequency reciprocating rig (HFRR), for
assessing the lubricating property of diesel fuels, including those fuels which may contain a lubricity-
enhancing additive. It defines two methods for measurement of the wear scar; Method “A” — Digital
camera, and Method “B” — Visual observation.
This test method applies to fuels used in diesel engines.
NOTE It is not known if this test method will predict the performance of all additive/fuel combinations,
including paraffinic fuels for which no additional correlation testing has been performed. Nevertheless, no data
has been presented to suggest that such fuels are not within scope.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 683-17, Heat-treated steels, alloy steels and free-cutting steels — Part 17: Ball and roller bearing steels
ISO 3170, Petroleum liquids — Manual sampling
ISO 3171, Petroleum liquids — Automatic pipeline sampling
ISO 3290-1, Rolling bearings — Balls — Part 1: Steel balls
ISO 4288, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Rules and
procedures for the assessment of surface texture
ISO 5272, Toluene for industrial use — Specifications
ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method
ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method
ASTM D4306, Practice for Aviation Fuel Sample Containers for Tests Affected by Trace Contamination
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO 12156-1:2016(E)
3.1
boundary lubrication
condition in which the friction and wear between two surfaces in relative motion are determined by
the properties of the surfaces and the properties of the contacting fluid, other than bulk viscosity
Note 1 to entry: Metal to metal contact occurs and the chemistry of the system is involved. Physically adsorbed
or chemically reacted soft films (usually very thin) support contact loads. As a result, some wear is inevitable.
3.2
lubricity
qualitative term describing the ability of a fluid to affect friction between, and wear to, surfaces in
relative motion under load
Note 1 to entry: In this test method, the lubricity of a fluid is evaluated by the wear scar, measured in micrometres,
produced on an oscillating ball from contact with a stationary disk immersed in the fluid operating under closely
controlled conditions.
3.3
wear scar diameter
WSD
mean diameter of the wear scar produced on the test ball
4 Principle
A sample of the fluid under test is placed in a test reservoir which is maintained at the specified test
temperature. A fixed steel ball is held in a vertically mounted chuck and forced against a horizontally
mounted stationary steel plate with an applied load. The test ball is oscillated at a fixed frequency and
stroke length while the interface with the plate is fully immersed in the fluid. The metallurgies of the
ball and plate, test fluid temperature, load, frequency, stroke length, and the ambient air conditions
of temperature and humidity during the test are specified. The wear scar generated on the test ball is
taken as a measure of the fluid lubricity.
5 Reagents and materials
5.1 Compressed air, if required for drying the equipment (8.1.1 and 8.1.2), supplied at a press
...