SIST EN 17155:2018

Liquid petroleum products - Determination of indicated cetane number (ICN) of middle distillate fuels - Primary reference fuels calibration method using a constant volume combustion chamber

This European Standard specifies a test method for the quantitative determination of the indicated cetane number (ICN) of middle distillate fuels and blending components, intended for use in compression ignition engines. The test method utilizes a constant volume combustion chamber with direct fuel injection into heated compressed air. Calibration of the apparatus using blends of primary reference materials over a scale of 0 to 100 enables fuel ignition delays, measured from the resulting pressure increase, to be used to determine and report ICN results.
This European Standard is applicable to middle distillate fuels of both petroleum and non-petroleum origin, hydrocarbon oils, oil-sands based fuels, blending components, fatty acid methyl esters (FAME), blends of fuel containing biodiesel material, diesel fuel oils containing cetane number improver additives, low-sulfur diesel fuel oils, aviation turbine fuels and polyoxymethylene dimethyl ether (OME). However, users applying this standard especially to unconventional distillate fuels are warned that the relationship between cetane number and combustion behaviour in real engines is not yet fully understood.
This European Standard covers the calibrated range of 35 ICN to 85 ICN.
NOTE 1   The analyser can measure ICN outside the calibrated range, but precision has not been determined.
NOTE 2   For the purpose of this standard, the expression "% (V/V)" is used to represent the volume fraction.
WARNING - The use of this standard can involve hazardous materials, operations and equipment. This Standard does not purport to address all of the safety problems associated with its use. It is the responsibility of users of this standard to take appropriate measures to ensure the safety and health of personnel prior to application of the standard, and fulfil statutory and regulatory requirements for this purpose.

Flüssige Mineralölerzeugnisse - Bestimmung der generischen Cetanzahl (GCZ) von Kraftstoffen aus Mitteldestillaten - Verfahren zur Kalibrierung mit primären Bezugskraftstoffen unter Verwendung einer Verbrennungskammer mit konstantem Volumen

Diese Europäische Norm legt ein Prüfverfahren zur quantitativen Bestimmung der indizierten Cetanzahl (ICZ) von Kraftstoffen aus Mitteldestillaten und Blendkomponenten fest, die in Dieselmotoren eingesetzt werden. Das Verfahren verwendet eine Verbrennungskammer mit konstantem Volumen mit direkter Kraft-stoffeinspritzung in erwärmte und komprimierte Luft. Die Kalibrierung der Prüfeinrichtung mit Hilfe von primären Referenzmaterialien in einem Bereich von 0 bis 100 ermöglicht es, Zündverzüge, deren Werte anhand des resultierenden Druckanstiegs gemessen werden, zu verwenden, um ICZ-Ergebnisse zu bestimmen und anzugeben.
Diese Europäische Norm gilt für Mitteldestillatkraftstoffe mineralölstämmiger und nicht mineral-ölstämmiger Herkunft, für Kohlenwasserstoffe, ölsandbasierte Kraftstoffe, Blendkomponenten, Fettsäure-methylester (FAME), Biodiesel enthaltende Kraftstoffmischungen, Dieselkraftstoffe, welche Zündverbesserer enthalten, schwefelarme Dieselkraftstoffe, Flugturbinenkraftstoffe und Polyoxymethylen-Dimethylether (OME). Anwender, die diese Norm in erster Linie auf unkonventionelle Destillatkraftstoffe anwenden, werden jedoch darauf hingewiesen, dass die Beziehung zwischen der Cetanzahl und dem Verbrennungsverhalten in realen Motoren noch nicht völlig geklärt ist.
Diese Europäische Norm deckt den kalibrierten Bereich von 35 ICZ bis 85 ICZ ab.
ANMERKUNG 1   Das Prüfgerät kann die ICZ außerhalb des kalibrierten Bereichs messen, allerdings liegen dafür keine Präzisionsdaten vor.
ANMERKUNG 2   Für die Anwendung der vorliegenden Norm wird für den Volumenanteil einer Substanz der Ausdruck "% (V/V)" verwendet.
WARNUNG - Die Anwendung dieser Norm kann die Anwendung gefährlicher Stoffe, Arbeitsgänge und Geräte mit sich bringen. Diese Norm beansprucht nicht, alle damit verbundenen Sicherheitsprobleme zu behandeln. Es liegt in der Verantwortung des Anwenders dieser Norm, vor ihrer Anwendung geeignete Maßnahmen für die Sicherheit und den Gesundheitsschutz des Personals zu ergreifen, und dafür Sorge zu tragen, dass behördliche und gesetzliche Maßnahmen eingehalten werden.

Produits pétroliers liquides - Détermination de l'indice de cétane indicative (ICI) des distillats moyens - Méthode du calibration par combustibles du reference primaire et combustion dans une chambre à volume constant

La présente Norme européenne prescrit une méthode d'essai pour la détermination quantitative de l’indice de cétane indiqué (ICI) des distillats moyens et des composants de mélange destinés à être utilisés dans les moteurs à allumage par compression. La méthode d’essai utilise une chambre de combustion à volume constant avec injection directe de carburant dans de l'air comprimé et chauffé. L’étalonnage de l’appareillage à l’aide de mélanges de matériaux de référence primaires sur une échelle de 0 à 100 permet d’obtenir des résultats d’ICI à partir des délais d'inflammation du carburant, mesurés à la suite de l’augmentation de pression ainsi observée.
La présente Norme européenne s’applique aux distillats moyens d’origine pétrolière et non pétrolière, aux hydrocarbures liquides, aux carburants provenant de sables asphaltiques, aux composants de mélange, aux esters méthyliques d’acides gras (EMAG), aux mélanges de carburants contenant du biodiesel, aux carburants diesel contenant des additifs procétanes, aux carburants diesel ayant une basse teneur en soufre, aux carburéacteurs et à l'éther diméthylique de polyoxyméthylène (OME). Cependant, l'attention des utilisateurs de la présente norme, en particulier lorsqu’elle est appliquée aux distillats combustibles non conventionnels, est attirée sur le fait que la relation entre l'indice de cétane et les phénomènes de combustion dans les moteurs n’est pas encore parfaitement comprise.
La présente Norme européenne couvre la plage étalonnée de 35 ICI à 85 ICI.
NOTE 1   L’analyseur peut mesurer l’ICI en dehors de la plage étalonnée, mais la fidélité n’a pas été déterminée.
NOTE 2   Pour les besoins de la présente norme, l’expression « %(V/V) » représente la fraction volumique.
AVERTISSEMENT — L'utilisation de la présente Norme peut impliquer la mise en œuvre de produits, d'opérations et d'équipements à caractère dangereux. La présente norme n’est pas censée aborder tous les problèmes de sécurité concernés par son usage. Il incombe aux utilisateurs de la présente norme de prendre les mesures appropriées pour assurer la sécurité et préserver la santé du personnel avant l’application de la norme, et satisfaire aux exigences légales et réglementaires applicables à cet effet.

Tekoči naftni proizvodi - Določevanje označenega cetanskega števila (ICN) srednjih destilacijskih goriv - Osnovna referenčna metoda kalibracije goriv z uporabo komore s konstantno prostornino

Ta standard določa metodo za kvantitativno ugotavljanje G-CN srednjih destilacijskih goriv in komponent za mešanje, namenjenih za uporabo v motorjih s kompresijskim vžigom. Metoda se uporablja tudi za srednja destilacijska goriva naftnega in nenaftnega izvora, olja na osnovi ogljikovodikov, goriva na osnovi oljnega peska, komponente za mešanje, metilne estre maščobnih kislin (FAME), mešanice goriv z biodizlom, dizelska kurilna olja z aditivi za izboljšanje cetanskega števila in dizelska kurilna olja z nizko vsebnostjo žvepla v območju umerjanja 35–85 G-CN

General Information

• Status: Published
• Public Enquiry End Date: 02-Oct-2017
• Publication Date: 11-Sep-2018
• ICS: 75.160.20 - Liquid fuels
• Technical Committee: NAD - Petroleum products, lubricants and related products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 29-Aug-2018
• Due Date: 03-Nov-2018
• Completion Date: 12-Sep-2018
• Ref Project: EN 17155:2018 - Liquid petroleum products - Determination of indicated cetane number (ICN) of middle distillate fuels - Primary reference fuels calibration method using a constant volume combustion chamber

Overview

EN 17155:2018 specifies a laboratory test method for determining the Indicated Cetane Number (ICN) of middle distillate fuels using a constant volume combustion chamber (CVCC) and a primary reference fuels (PRF) calibration. The method measures fuel ignition delay-derived from pressure rises after direct injection into heated, compressed air-and converts it to ICN using a calibration curve based on blends of n‑hexadecane (cetane) and 1‑methylnaphthalene (1‑MN). The standard covers a calibrated ICN range of 35 to 85 and applies to petroleum and non‑petroleum distillates, including biodiesel (FAME), OME, aviation turbine fuels and fuels containing cetane improver additives.

Key topics and requirements

• Test principle: Direct injection into a CVCC; dynamic pressure sensing; ignition delays (ID0 and ID150) are recorded and averaged to obtain ID.
• Calibration: Apparatus calibrated with seven PRF blend fluids (0–100 scale using n‑hexadecane and 1‑MN). ICN is linked to PRF volume fraction (ICN = % n‑hexadecane (V/V)).
• Apparatus & operation: Requirements for combustion chamber, injection system, heated pressurization, air quality, auto‑sampler, control and data acquisition, warm‑up and standard operating conditions.
• Quality control: Routine verification, PRF calibration fluids, QC samples and documented procedures for calibration, verification and ongoing performance monitoring.
• Scope limits & notes:
  • Calibrated range: 35–85 ICN (measurements outside this range possible but precision not established).
  • Cautions when applying to unconventional fuels-relationship between ICN and real‑engine combustion may be uncertain.
  • Safety warning: hazardous materials and operations-users must follow applicable safety and regulatory requirements.
• Normative references: Includes EN ISO 3170, EN ISO 3171, EN ISO 3696 and related documents for sampling and laboratory reagents.

Applications and users

• Practical for engine manufacturers, fuel refiners, test laboratories, fuel suppliers/marketers and regulatory bodies who need a standardized ICN value to:
  • Specify and match diesel fuels to compression‑ignition engines.
  • Evaluate blending components, FAME or OME impacts on ignition quality.
  • Support fuel quality control, product development and trade specifications.
• Useful where a CVCC‑based, PRF‑calibrated alternative to engine‑based cetane tests (e.g., EN ISO 5165) is preferred.

Related standards

• EN ISO 5165 (cetane number by diesel engine) - correlation work referenced.
• EN ISO 3170 / EN ISO 3171 (sampling), EN ISO 3696 (water for lab use) - normative references cited in EN 17155:2018.

For full procedural details, apparatus drawings, calibration recipes and report formats consult the complete EN 17155:2018 document.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Flüssige Mineralölerzeugnisse - Bestimmung der generischen Cetanzahl (GCZ) von Kraftstoffen aus Mitteldestillaten - Verfahren zur Kalibrierung mit primären Bezugskraftstoffen unter Verwendung einer Verbrennungskammer mit konstantem VolumenProduits pétroliers liquides - Détermination de l'indice de cétane indicative (ICI) des distillats moyens - Méthode du calibration par combustibles du reference primaire et combustion dans une chambre à volume constantLiquid petroleum products - Determination of indicated cetane number (ICN) of middle distillate fuels - Primary reference fuels calibration method using a constant volume combustion chamber75.160.20Liquid fuelsICS:Ta slovenski standard je istoveten z:EN 17155:2018SIST EN 17155:2018en,fr,de01-oktober-2018SIST EN 17155:2018SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 17155
July
t r s z ICS
y wä s x rä t r English Version
Liquid petroleum products æ Determination of indicated reference fuels calibration method using a constant volume combustion chamber Produits pétroliers liquides æ Détermination de l 5indice d 5étalonnage avec carburants de référence primaires et chambre de combustion à volume constant
Flüssige Mineralölerzeugnisse æ Bestimmung der Mitteldestillaten æ Verfahren mittels Kalibrierung mit primären Bezugskraftstoffen unter Verwendung einer Verbrennungskammer mit konstantem Volumen This European Standard was approved by CEN on
t r April
t r s zä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels
t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s y s w wã t r s z ESIST EN 17155:2018

Combustion analyser with auto-sampler description . 17 A.1 General . 17 A.2 Apparatus description . 17 A.2.1 Combustion chamber . 17 A.2.2 Fuel injection system . 17 A.2.3 Waste container . 18 A.2.4 Coolant system . 19 A.2.5 Combustion Charge Air and exhaust system . 19 A.2.6 Automatic carousel . 20 SIST EN 17155:2018

Operation details in support of the standard test procedure . 21 B.1 General . 21 B.2 Test sequence after the combustion chamber is at a stable temperature . 21 B.3 Unit shutdown . 22 Annex C (informative)
Preparation of calibration and verification fluids . 23 C.1 General . 23 C.2 Checks . 23 C.3 Blending . 23 C.4 Recording. 24 Bibliography . 25
1,0 mg/kg measured using ASTM D3703 or an equivalent national standard. C.2.1 and the instrument manufacturer’s instructions give advice on the use of a molecular sieve if the hydroperoxide level is too high. Alternatively a new batch of the material may be obtained and tested for hydroperoxide level. 5.1.2 1-methylnaphthalene, minimum purity of 97,0 % (V/V), the designated 0 ICN component, required for blending the calibration and verification fluids. 5.1.2.1 Store 1-methylnaphthalene in a dark cool place to avoid possible UV light and temperature effects. SIST EN 17155:2018

1,0 mg/kg measured using ASTM D3703 or an equivalent national standard. C.2.1 and the instrument manufacturer’s instructions give advice on the use of a molecular sieve if the hydroperoxide level is too high. Alternatively a new batch of the material may be obtained and tested for hydroperoxide level. 5.1.3 Calibration fluids, 7 volumetric blends of n-hexadecane and 1-methylnaphthalene in accordance with Formula (1) and Table 1 with values within 0,5 ICN of the required values to an accuracy of ± 0,01 ICN. 5.1.3.1 Calibration fluids shall be stored in sealed containers (6.7.1) of 40 ml to 100 ml in volume under an inert gas (5.7), in a dark cool place to avoid possible effects of UV light. 40 ml is required for the test. Table 1 — ICN of calibration fluids ICN 35,00 40,00 46,00 53,00 60,00 70,00 85,00 5.1.3.2 Calibration fluids are available commercially or may be made up locally. Annex C outlines a recommended procedure. 5.1.3.3 The ICN number of the blend is calculated using Formula (1). The precise ICN of the blend shall be determined by mass measurements and density to provide volumetric equivalence. The volumes of PRFs used shall be accurately dispensed and recorded so that the validity of the ICN determination can be checked. See Annex C. 5.1.4 Verification fluid, a volumetric blend of n-hexadecane and 1-methylnaphthalene in accordance with Formula (1) with a known ICN to an accuracy of ± 0,01 ICN. The ICN shall be different to those shown in Table 1, by at least 1 ICN, and be made from different batches of PRFs. 5.1.4.1 Verification fluids shall be stored in sealed containers of 40 ml to 100 ml in volume under an inert gas (5.7), in a dark cool place to avoid possible effects of UV light. 40 ml is required for the test. 5.1.4.2 Verification fluids are available commercially or may be made up locally. See Annex C for additional information. 5.1.4.3 The ICN number of the blend shall be determined by mass measurements and density to provide volumetric equivalence. The volumes of PRFs used shall be accurately dispensed and recorded so that the validity of the ICN determination can be checked. See Annex C for additional information. 5.2 Quality control (QC) sample, stable and homogenous distillate fuel, similar in nature to the materials under test. For sampling and handling see Clause 8. 5.3 Combustion charge air, compressed air containing (20,9 ± 0,5) % (V/V) oxygen with the balance nitrogen, less than 0,003 % (V/V) hydrocarbons, and less than 0,025 % (V/V) water and capable of delivering a regulated pressure of 2,5 MPa to 3,0 MPa. 5.3.1 Air compressed locally can meet the above requirements. Follow the manufacturer’s instructions regarding filtration and cleanliness of the air. NOTE The oxygen content of combustion charge air can vary between batches (cylinders). Significant variation can lead to changes in ignition delay (higher oxygen content leads to shorter ignition delays). Combustion charge air produced locally by a compressor can minimize variations. 5.4 Cleaning fluid, 1-decanol, minimum purity 99,0 %, filtered through a 0,45 micrometre, or less, PTFE media filter. SIST EN 17155:2018

20 ml plastic, suitable for use with a syringe filter (6.3). 6.5 Recirculating cooler capable of recirculating coolant to the injector assembly and the dynamic pressure sensor and maintaining a bath temperature of 65 °C ± 5 °C. 6.6 Computer, for inputting and outputting data, printing functions and interfacing with the analyser and networks. 6.7 Apparatus for in-house PRF blending (optional). 6.7.1 Amber glass bottles, with suitable closures, capacity as required (40 to 100 ml), for storing in-house blended PRFs. SIST EN 17155:2018
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