SIST EN ISO 12156-1:2006

SLOVENSKI STANDARD
SIST EN ISO 12156-1:2006
01-december-2006
1DGRPHãþD
SIST EN ISO 12156-1:2000
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Diesel fuel - Assessment of lubricity using the high-frequency reciprocating rig (HFRR) -
Part 1: Test method (ISO 12156-1:2006)
Dieselkraftstoff - Methode zur Bestimmung der Schmierfähigkeit unter Verwendung eines
Schwingungsverschleiß-Prüfgerätes (HFRR) - Teil 1: Prüfverfahren (ISO 12156-1:2006)
Carburant diesel - Évaluation du pouvoir lubrifiant au banc alternatif a haute fréquence
(HFRR) - Partie 1: Méthode d'essai (ISO 12156-1:2006)
Ta slovenski standard je istoveten z: EN ISO 12156-1:2006
ICS:
75.160.20 7HNRþDJRULYD Liquid fuels
SIST EN ISO 12156-1:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN ISO 12156-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2006
ICS 75.160.20 Supersedes EN ISO 12156-1:2000
English Version
Diesel fuel - Assessment of lubricity using the high-frequency
reciprocating rig (HFRR) - Part 1: Test method (ISO 12156-
1:2006)
Carburant diesel - Évaluation du pouvoir lubrifiant au banc Dieselkraftstoff - Methode zur Bestimmung der
alternatif à haute fréquence (HFRR) - Partie 1: Méthode Schmierfähigkeit unter Verwendung eines
d'essai (ISO 12156-1:2006) Schwingungsverschleiß-Prüfgerätes (HFRR) - Teil 1:
Prüfverfahren (ISO 12156-1:2006)
This European Standard was approved by CEN on 7 September 2006.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 12156-1:2006: E
worldwide for CEN national Members.

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EN ISO 12156-1:2006 (E)





Foreword


This document (EN ISO 12156-1:2006) has been prepared by Technical Committee ISO/TC 22
"Road vehicles" 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 April 2007, and conflicting national
standards shall be withdrawn at the latest by April 2007.

This document supersedes EN ISO 12156-1:2000.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.


Endorsement notice

The text of ISO 12156-1:2006 has been approved by CEN as EN ISO 12156-1:2006 without any
modifications.

2

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INTERNATIONAL ISO
STANDARD 12156-1
Second edition
2006-10-01


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 12156-1:2006(E)
©
ISO 2006

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ISO 12156-1:2006(E)
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ii © ISO 2006 – All rights reserved

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ISO 12156-1:2006(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope .1
2 Normative references .1
3 Terms and definitions .2
4 Principle.2
5 Reagents and materials .2
6 Apparatus .3
7 Preparation and calibration .5
7.1 Preparation of apparatus .5
7.2 Calibration and correction .5
8 Test procedure.6
9 Measurement of wear scar.7
10 Calculations.7
10.1 Uncorrected mean wear scar diameter (MWSD).7
10.2 Initial absolute vapour pressure (AVP ).8
1
10.3 Final absolute vapour pressure (AVP ).8
2
10.4 Mean absolute vapour pressure (AVP).8
10.5 Corrected wear scar diameter (WS1,4).8
11 Test report .9
12 Precision.9
12.1 Repeatability, r .9
12.2 Reproducibility, R.9
Annex A (informative) Measurement of HFRR wear scars.10

© ISO 2006 – All rights reserved iii

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ISO 12156-1:2006(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
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.
ISO 12156-1 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 7, Injection
equipment and filters for use on road vehicles, in collaboration with ISO/TC 28, Petroleum products and
lubricants.
This second edition cancels and replaces the first edition (ISO 12156-1:1997), which has been technically
revised. It also incorporates the Technical Corrigendum ISO 12156-1:1997/Cor.1:1998.
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
iv © ISO 2006 – All rights reserved

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ISO 12156-1:2006(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 operation of
the component.
Test results from fuels tested to this procedure have been found to correlate to many fuel/hardware
combinations and provide an adequate prediction of the lubricating quality of the fuel.

© ISO 2006 – All rights reserved v

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INTERNATIONAL STANDARD ISO 12156-1:2006(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 applies to fuels used in diesel engines.
2 Normative references
The following referenced documents are indispensable for the application 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 Guide 33:2000, Uses of certified reference materials
ISO Guide 34:2000, General requirements for the competence of reference material producers
ISO Guide 35:2006, Reference materials — General and statistical principles for certification
ISO 683-17:1999, Heat-treated steels, alloy steels and free-cutting steels — Part 17: Ball and roller bearing
steels
ISO 3290:2001, Roller bearings — Balls — Dimensions and tolerances
ISO 4259:1992, Petroleum products — Determination and application of precision data in relation to methods
of test
ISO 5272:1979, Toluene for industrial use — Specifications
ISO 6507-1:2005, Metallic materials — Vickers hardness test — Part 1: Test method
ISO 6508-1:2005, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F,
G, H, K, N, T)
ASTM D 329-02, Standard Specification for Acetone
© ISO 2006 – All rights reserved 1

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ISO 12156-1:2006(E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
lubricity
property of the fluid, measured by the wear scar produced on an oscillating ball from contact with a stationary
plate immersed in the fluid and operating under closely controlled conditions
3.2
mean wear scar diameter
MWSD
uncorrected mean diameter of the wear scar produced on the test ball
3.3
WS1,4
calculated value of wear scar diameter corrected to the standardized water vapour pressure of 1,4 kPa
3.4
humidity correction factor
HCF
factor for adjusting the wear scar value to account for test conditions which differ from the standardized water
vapour pressure of 1,4 kPa
NOTE HCF is expressed in micrometres per kilopascal.
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,
temperature, load, frequency, and stroke length are specified. The ambient conditions of temperature and
humidity during the test are used to correct the size of the wear scar generated on the test ball to a standard
set of ambient conditions. The corrected wear scar diameter is a measure of the fluid lubricity.
5 Reagents and materials
5.1 Compressed air, if required for drying the equipment (see 7.1.2), supplied at a pressure of 140 kPa to
3 3
210 kPa and containing less than 0,1 ml/m hydrocarbons and less than 50 ml/m water.
WARNING — Use with extreme caution in the presence of combustible material.
5.2 Toluene, in accordance with ISO 5272.
WARNING — Flammable. Harmful if inhaled.
5.3 Acetone, in accordance with ASTM D 329-02.
WARNING — Extremely flammable. Vapours may cause flash fire.
5.4 Reference fluids
WARNING — Flammable.
2 © ISO 2006 – All rights reserved

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