Diesel and domestic heating fuels - Determination of cold filter plugging point - Linear cooling bath method

This European Standard specifies an automated method for the determination of the cold filter plugging point (CFPP) of diesel and domestic heating fuels using linear cooling.
This European Standard is applicable to fatty-acid methyl esters (FAME) and to distillate fuels as well as paraffinic diesel fuels, including those containing FAME, flow-improvers or other additives, intended for use in diesel engines and domestic heating installations.
The results obtained from the method specified in this European Standard are suitable for estimating the lowest temperature at which a fuel will give trouble-free flow in the fuel system.
NOTE   In the case of diesel fuels, the results are usually close to the temperature of failure in service except when the fuel system contains, for example, a paper filter installed in a location exposed to the weather or if the filter plugging temperature is more than 12 °C below the cloud point of the fuel. Domestic heating installations are usually less critical and often operate at a satisfactory level at temperatures somewhat lower than those indicated by the test results.
WARNING - The use of this standard may 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 the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Dieselkraftstoffe und Haushaltsheizöle - Bestimmung des Temperaturgrenzwertes der Filtrierbarkeit - Verfahren mit einem linearen Kühlbad

Dieses Dokument legt ein automatisches Verfahren zur Bestimmung des Temperaturgrenzwertes der Filtrierbarkeit (CFPP, en: cold filter plugging point) von Dieselkraftstoff und Haushaltsheizölen unter Verwendung eines Prüfgerätes mit linearer Abkühlrate fest.
Dieses Dokument ist anwendbar auf Fettsäure-Methylester (FAME, en: fatty-acid methyl esters) und Destillatkraft- und Brennstoffe sowie paraffinische Dieselkraftstoffe, einschließlich jener, die FAME, Flie߬verbesserer oder andere Zusätze enthalten, die für den Gebrauch in Dieselmotoren und Haushaltsheizungs¬anlagen bestimmt sind.
Die durch das in diesem Dokument festgelegte Verfahren erzielten Ergebnisse eignen sich zur Schätzung der niedrigsten Temperatur, bei der ein Kraft- oder Brennstoff störungsfrei im Kraft- oder Brennstoffsystem fließen kann.
ANMERKUNG   Bei Dieselkraftstoffen liegen die Ergebnisse gewöhnlich nahe bei der Betriebsstörungstemperatur, ausgenommen dann, wenn sich im Kraftstoffsystem zum Beispiel ein Papierfilter an einer Stelle befindet, die der Witterung ausgesetzt ist, oder wenn der CFPP mehr als 12 °C unterhalb des Cloudpoints des Kraftstoffes liegt. Haushaltsheizungsanlagen sind gewöhnlich weniger kritisch und arbeiten oft auf einem zufriedenstellenden Niveau bei Temperaturen, die etwas niedriger als durch die Prüfergebnisse ausgewiesen sind.
WARNUNG - Die Anwendung dieses Dokuments kann die Anwendung gefährlicher Stoffe, Arbeitsgänge und Geräte mit sich bringen. Dieses Dokument beansprucht nicht, alle damit verbundenen Sicherheitsprobleme zu behandeln. Es liegt in der Verantwortung des Anwenders dieses Dokuments, vor seiner Anwendung angemessene Maßnahmen im Hinblick auf Sicherheit und Gesundheit zu ergreifen und die Anwendbarkeit einschränkender Vorschriften zu ermitteln.

Combustibles pour moteurs diesel et pour installations de chauffage domestique - Détermination de la température limite de filtrabilité - Méthode au bain à refroidissement linéaire

Le présent document spécifie une méthode automatisée pour la détermination de la température limite de filtrabilité (TLF) des combustibles pour moteurs diesel et pour installation de chauffage domestique faisant appel à un refroidissement linéaire.
Le présent document est applicable aux esters méthyliques d’acides gras (EMAG) et aux combustibles distillés, tout autant qu’aux carburants diesel paraffiniques, y compris ceux contenant des EMAG, des additifs améliorateurs d’écoulement ou autres additifs, destinés à être utilisés dans les moteurs diesel et les installations de chauffage domestique.
Les résultats obtenus par la méthode spécifiée dans le présent document conviennent pour estimer la température la plus basse à laquelle un combustible ne présentera pas de problème d’écoulement dans le circuit de combustible.
NOTE   Dans le cas des combustibles pour moteurs diesel, les résultats sont généralement proches de la température de défaillance observée en service, sauf lorsque le circuit de combustible comporte, par exemple, un filtre en papier disposé à un emplacement soumis aux intempéries ou si la température de colmatage du filtre est inférieure de plus de 12 °C à celle du point de trouble du combustible. Les installations de chauffage domestique sont généralement moins critiques et fonctionnent souvent à un niveau satisfaisant à des températures quelque peu inférieures à celles indiquées par les résultats des essais.
AVERTISSEMENT — L'utilisation du présent document peut impliquer l'intervention de produits, d'opérations et d'équipements à caractère dangereux. Ce document n'est pas censé aborder tous les problèmes de sécurité concernés par sa mise en œuvre. Il est de la responsabilité de l'utilisateur de consulter et d'établir des règles de sécurité et d'hygiène appropriées et de déterminer l'applicabilité des restrictions réglementaires avant utilisation.

Dizelsko gorivo in kurilno olje za gospodinjstvo - Ugotavljanje filtrirnosti - Metoda linearnega ohlajanja v kopeli

Ta evropski standard določa avtomatizirano metodo za ugotavljanje filtrirnosti (CFPP) dizelskega goriva in kurilnega olja za gospodinjstvo z linearnim ohlajanjem.
Ta evropski standard se uporablja za metilne estre maščobnih kislin (FAME) in destilatna goriva ter parafinska dizelska goriva, vključno s tistimi, ki vsebujejo metilne estre maščobnih kislin, izboljševalce pretočnosti in druge dodatke, namenjene za uporabo v dizelskih motorjih in kurilnih inštalacijah za gospodinjstvo.
Rezultati, pridobljeni z metodo iz tega evropskega standarda, so primerni za oceno najnižje temperature, pri kateri se bo gorivo brez težav pretakalo skozi sistem za gorivo.
OPOMBA:   V primeru dizelskih goriv so rezultati običajno blizu temperature odpovedi delovanja, razen če sistem za gorivo vsebuje npr. papirnati filter, ki je nameščen na mestu, izpostavljenem vremenskim vplivom, ali če je temperatura filtrirnosti višja od 12 °C pod motniščem goriva. Kurilne inštalacije za gospodinjstvo so običajno manj kritične in velikokrat zadovoljivo delujejo pri temperaturah, ki so nekoliko nižje od tistih v rezultatih preskušanja.
OPOZORILO: Pri uporabi tega standarda so lahko prisotni nevarni materiali, postopki in oprema. Ta standard ne obravnava vseh varnostnih težav, ki se navezujejo na njegovo uporabo. Za vzpostavitev ustreznih varnostnih in zdravstvenih praks ter za določitev uporabnosti regulativnih omejitev pred uporabo je odgovoren uporabnik tega standarda.

General Information

Status
Published
Public Enquiry End Date
02-Jan-2022
Publication Date
22-Nov-2022
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
10-Nov-2022
Due Date
15-Jan-2023
Completion Date
23-Nov-2022

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SLOVENSKI STANDARD
SIST EN 16329:2023
01-januar-2023
Nadomešča:
SIST EN 16329:2013

Dizelsko gorivo in kurilno olje za gospodinjstvo - Ugotavljanje filtrirnosti - Metoda

linearnega ohlajanja v kopeli

Diesel and domestic heating fuels - Determination of cold filter plugging point - Linear

cooling bath method

Dieselkraftstoffe und Haushaltsheizöle - Bestimmung des Temperaturgrenzwertes der

Filtrierbarkeit - Verfahren mit einem linearen Kühlbad
Combustibles pour moteurs diesel et pour installations de chauffage domestique -

Détermination de la température limite de filtrabilité - Méthode au bain à refroidissement

linéaire
Ta slovenski standard je istoveten z: EN 16329:2022
ICS:
75.160.20 Tekoča goriva Liquid fuels
SIST EN 16329:2023 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 16329:2023
---------------------- Page: 2 ----------------------
SIST EN 16329:2023
EN 16329
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2022
EUROPÄISCHE NORM
ICS 75.160.20 Supersedes EN 16329:2013
English Version
Diesel and domestic heating fuels - Determination of cold
filter plugging point - Linear cooling bath method

Combustibles pour moteurs diesel et pour installations Dieselkraftstoffe und Haushaltsheizöle - Bestimmung

de chauffage domestique - Détermination de la des Temperaturgrenzwertes der Filtrierbarkeit -

température limite de filtrabilité - Méthode au bain à Verfahren mit einem linearen Kühlbad

refroidissement linéaire
This European Standard was approved by CEN on 16 October 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 16329:2022 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 16329:2023
EN 16329:2022 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Introduction .................................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 5

4 Principle ............................................................................................................................................................. 6

5 Reagents and materials ................................................................................................................................. 6

6 Apparatus ........................................................................................................................................................... 6

7 Sampling .......................................................................................................................................................... 13

8 Preparation of the test sample ................................................................................................................ 13

9 Preparation of apparatus .......................................................................................................................... 13

10 Procedure........................................................................................................................................................ 13

11 Calibration and verification ..................................................................................................................... 14

12 Expression of results ................................................................................................................................... 15

13 Precision .......................................................................................................................................................... 15

14 Test report ...................................................................................................................................................... 16

Annex A (normative) Thermometer requirements ........................................................................................ 17

Bibliography ................................................................................................................................................................. 18

---------------------- Page: 4 ----------------------
SIST EN 16329:2023
EN 16329:2022 (E)
European foreword

This document (EN 16329:2022) has been prepared by 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 May 2023, and conflicting national standards shall be

withdrawn at the latest by May 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.

This document supersedes EN 16329:2013.

A significant technical difference between this document and the previous edition of EN 16329 is:

— Addition of the bias correction reporting format.

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.
---------------------- Page: 5 ----------------------
SIST EN 16329:2023
EN 16329:2022 (E)
Introduction

The method included in this document is an alternative technique to EN 116 [1]. The cooling bath is no

longer operated in several temperature stages (as in EN 116), but is replaced by a refrigeration unit

with linear cooling.

Inter-laboratories studies (ILS) conducted for this determination method showed improved precision

compared to EN 116. The studies covered currently marketed fuels, including non-fossil components

(FAME-blends) or biofuels and paraffinic diesel fuels. The range of CFPP values for the fuels tested was

from – 47 °C to +11 °C.
---------------------- Page: 6 ----------------------
SIST EN 16329:2023
EN 16329:2022 (E)
1 Scope

This document specifies an automated method for the determination of the cold filter plugging point

(CFPP) of diesel and domestic heating fuels using linear cooling.

This document is applicable to fatty-acid methyl esters (FAME) and to distillate fuels as well as

paraffinic diesel fuels, including those containing FAME, flow-improvers or other additives, intended for

use in diesel engines and domestic heating installations.

The results obtained from the method specified in this document are suitable for estimating the lowest

temperature at which a fuel will give trouble-free flow in the fuel system.

NOTE In the case of diesel fuels, the results are usually close to the temperature of failure in service except

when the fuel system contains, for example, a paper filter installed in a location exposed to the weather or if the

filter plugging temperature is more than 12 °C below the cloud point of the fuel. Domestic heating installations are

usually less critical and often operate at a satisfactory level at temperatures somewhat lower than those indicated

by the test results.

WARNING — The use of this document can involve hazardous materials, operations and equipment.

This document does not purport to address all of the safety problems associated with its use. It is the

responsibility of the user of this document to establish appropriate safety and health practices and

determine the applicability of regulatory limitations prior to use.
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 3170, Petroleum liquids — Manual sampling (ISO 3170)
EN ISO 3171, Petroleum liquids — Automatic pipeline sampling (ISO 3171)

EN ISO 17034, General requirements for the competence of reference material producers (ISO 17034)

ISO 261, ISO general purpose metric screw threads — General plan
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
cold filter plugging point
CFPP

highest temperature at which a given volume of fuel fails to pass through a standardized filtration

device in a specified time, when cooled under standardized conditions
---------------------- Page: 7 ----------------------
SIST EN 16329:2023
EN 16329:2022 (E)
4 Principle

A test portion of the fuel is cooled under the specified conditions and is drawn at intervals of 1 °C into a

pipette under a controlled vacuum of 2 kPa through a standardized wire mesh filter. The procedure is

repeated, as the fuel continues to cool, for each 1 °C below the first test temperature. Testing is

continued until the amount of wax crystals, which have separated out of solution, is sufficient to stop or

slow down the flow so that the time taken to fill the pipette exceeds 60 s or the fuel fails to return

completely to the test jar before the fuel has cooled by a further 1 °C.

The indicated temperature at which the last filtration was commenced is recorded as the cold filter

plugging point (CFPP).
5 Reagents and materials
5.1 Hydrocarbon solvents, technical grade, e.g. Heptane.
5.2 Light hydrocarbon solvents, technical grade, e.g. Isopentane.
5.3 Lintless filter paper, with particle retention of 30 µm.

5.4 Certified reference materials (CRM), from suppliers according to EN ISO 17034.

NOTE CRM as specified in EN 116 can be used, see Clause 11. CRM can be obtained from the European

Commission's Joint Research Centre (JRC).
6 Apparatus
6.1 General

The equipment is described in detail in 6.2 to 6.12. Unless otherwise stated, all dimensions in the

figures are given in mm.

IMPORTANT — Parts of the apparatus made of copper, zinc or brass can interact with bio-components

like Fatty Acid Methyl Ester (FAME). Care shall be taken. Parts made from alternative materials are

available.

6.2 Test jar, cylindrical, of clear glass, flat bottomed, with an outside diameter of (34 ± 0,5) mm, a

wall thickness of (1,20 ± 0,15) mm and a height of (120 ± 5) mm. The jar shall have a permanent mark

at the 45 ml level.

6.3 Jacket, watertight, cylindrical, flat bottomed, to be used as an air bath. It shall have an inside

diameter of (45 ± 0,25) mm and a height of (115 ± 3) mm.

6.4 Spacer, made from POM-C , except for the stainless steel rods with 2 mm diameter, to be placed

into the jacket (6.3), conforming to the dimensions as shown in Figure 1.
POM-C is Polyoxymethylen Copolymer.
---------------------- Page: 8 ----------------------
SIST EN 16329:2023
EN 16329:2022 (E)
Dimensions in millimetres
Key
1 rod (3 in total)
Figure 1 — Spacer

6.5 Stopper, of oil-resistant and non-thermal conductive material, having three holes to

accommodate the pipette with filter unit (6.6), the thermometer (6.9) and to allow venting of the

system, and able to ensure that pipette and thermometer are safely positioned in the test jar.

---------------------- Page: 9 ----------------------
SIST EN 16329:2023
EN 16329:2022 (E)
6.6 Pipette with filter unit

6.6.1 A pipette of clear glass with a volume of (20 ± 0,2) ml at a point (149 ± 0,5) mm from the

bottom of the pipette (see Figure 2). It shall be connected to the filter unit.
Dimensions in millimetres
Figure 2 — Pipette
---------------------- Page: 10 ----------------------
SIST EN 16329:2023
EN 16329:2022 (E)
6.6.2 A filter unit as in Figure 3, with gen
...

SLOVENSKI STANDARD
oSIST prEN 16329:2021
01-december-2021

Dizelsko gorivo in kurilno olje za gospodinjstvo - Ugotavljanje filtrirnosti - Metoda

linearnega ohlajanja v kopeli

Diesel and domestic heating fuels - Determination of cold filter plugging point - Linear

cooling bath method

Dieselkraftstoffe und Haushaltsheizöle - Bestimmung des Temperaturgrenzwertes der

Filtrierbarkeit - Verfahren mit einem linearen Kühlbad
Combustibles pour moteurs diesel et pour installations de chauffage domestique -

Détermination de la température limite de filtrabilité - Méthode au bain à refroidissement

linéaire
Ta slovenski standard je istoveten z: prEN 16329
ICS:
75.160.20 Tekoča goriva Liquid fuels
oSIST prEN 16329:2021 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 16329:2021
---------------------- Page: 2 ----------------------
oSIST prEN 16329:2021
DRAFT
EUROPEAN STANDARD
prEN 16329
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2021
ICS 75.160.20 Will supersede EN 16329:2013
English Version
Diesel and domestic heating fuels - Determination of cold
filter plugging point - Linear cooling bath method

Combustibles pour moteurs diesel et pour installations Dieselkraftstoffe und Haushaltsheizöle - Bestimmung

de chauffage domestique - Détermination de la des Temperaturgrenzwertes der Filtrierbarkeit -

température limite de filtrabilité - Méthode au bain à Verfahren mit einem linearen Kühlbad

refroidissement linéaire

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 19.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Turkey and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16329:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN 16329:2021
prEN 16329:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Introduction .................................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 5

4 Principle ............................................................................................................................................................. 6

5 Reagents and materials ................................................................................................................................. 6

6 Apparatus ........................................................................................................................................................... 6

7 Sampling .......................................................................................................................................................... 13

8 Preparation of the test sample ................................................................................................................ 13

9 Preparation of apparatus .......................................................................................................................... 13

10 Procedure........................................................................................................................................................ 13

11 Calibration and verification ..................................................................................................................... 14

12 Expression of results ................................................................................................................................... 15

13 Precision .......................................................................................................................................................... 15

14 Test report ...................................................................................................................................................... 16

Annex A (normative) Thermometer requirements ........................................................................................ 17

Bibliography ................................................................................................................................................................. 18

---------------------- Page: 4 ----------------------
oSIST prEN 16329:2021
prEN 16329:2021 (E)
European foreword

This document (prEN 16329:2021) has been prepared by 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 document is currently submitted to the CEN Enquiry.
This document will supersede EN 16329:2013.

In comparison with the previous edition, the addition of the bias correction reporting format has been

introduced.
---------------------- Page: 5 ----------------------
oSIST prEN 16329:2021
prEN 16329:2021 (E)
Introduction

The method included in this document is an automated alternative technique to EN 116 [1]. The cooling

bath is no longer operated in several temperature stages (as in EN 116), but is replaced by a

refrigeration unit with linear cooling.

Inter-laboratories studies (ILS) conducted for this determination method showed improved precision

compared to EN 116. The studies covered currently marketed fuels, including non-fossil components

(FAME-blends) or biofuels and paraffinic diesel fuels. The range of CFPP values for the fuels tested was

from – 47 °C to +11 °C.
---------------------- Page: 6 ----------------------
oSIST prEN 16329:2021
prEN 16329:2021 (E)
1 Scope

This document specifies an automated method for the determination of the cold filter plugging point

(CFPP) of diesel and domestic heating fuels using linear cooling.

This document is applicable to fatty-acid methyl esters (FAME) and to distillate fuels as well as

paraffinic diesel fuels, including those containing FAME, flow-improvers or other additives, intended for

use in diesel engines and domestic heating installations.

The results obtained from the method specified in this document are suitable for estimating the lowest

temperature at which a fuel will give trouble-free flow in the fuel system.

NOTE In the case of diesel fuels, the results are usually close to the temperature of failure in service except

when the fuel system contains, for example, a paper filter installed in a location exposed to the weather or if the

filter plugging temperature is more than 12 °C below the cloud point of the fuel. Domestic heating installations are

usually less critical and often operate at a satisfactory level at temperatures somewhat lower than those indicated

by the test results.

WARNING — The use of this document can involve hazardous materials, operations and equipment.

This document does not purport to address all of the safety problems associated with its use. It is the

responsibility of the user of this document to establish appropriate safety and health practices and

determine the applicability of regulatory limitations prior to use.
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 3170, Petroleum liquids - Manual sampling (ISO 3170)
EN ISO 3171, Petroleum liquids - Automatic pipeline sampling (ISO 3171)

EN ISO 17034, General requirements for the competence of reference material producers (ISO 17034)

ISO 261, ISO general purpose metric screw threads — General plan
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
cold filter plugging point
CFPP

highest temperature at which a given volume of fuel fails to pass through a standardized filtration

device in a specified time, when cooled under standardized conditions
---------------------- Page: 7 ----------------------
oSIST prEN 16329:2021
prEN 16329:2021 (E)
4 Principle

A test portion of the fuel is cooled under the specified conditions and is drawn at intervals of 1 °C into a

pipette under a controlled vacuum of 2 kPa through a standardized wire mesh filter. The procedure is

repeated, as the fuel continues to cool, for each 1 °C below the first test temperature. Testing is

continued until the amount of wax crystals, which have separated out of solution, is sufficient to stop or

slow down the flow so that the time taken to fill the pipette exceeds 60 s or the fuel fails to return

completely to the test jar before the fuel has cooled by a further 1 °C.

The indicated temperature at which the last filtration was commenced is recorded as the cold filter

plugging point (CFPP).
5 Reagents and materials
5.1 Hydrocarbon solvents, technical grade, e.g. Heptane.
5.2 Light hydrocarbon solvents, technical grade, e.g. Isopentane.
5.3 Lintless filter paper, with particle retention of 30 µm.

5.4 Certified reference materials (CRM), from suppliers according to EN ISO 17034.

NOTE CRM as defined by EN 116 can be used, see Clause 11. CRM can be obtained from the European

Commission's Joint Research Centre (JRC)..
6 Apparatus
6.1 General

The equipment is described in detail in 6.2 to 6.12. Unless otherwise stated, all dimensions in the

figures are given in mm.

IMPORTANT — Parts of the apparatus made of copper, zinc or brass can interact with bio-components

like Fatty Acid Methyl Ester (FAME). Care shall be taken. Parts made from alternative materials are

available.

6.2 Test jar, cylindrical, of clear glass, flat bottomed, with an outside diameter of (34 ± 0,5) mm, a

wall thickness of (1,20 ± 0,15) mm and a height of (120 ± 5) mm. The jar shall have a permanent mark

at the 45 ml level.

6.3 Jacket, watertight, cylindrical, flat bottomed, to be used as an air bath. It shall have an inside

diameter of (45 ± 0,25) mm and a height of (115 ± 3) mm.

6.4 Spacer, made from POM-C , except for the stainless steel rods with 2 mm diameter, to be placed

into the jacket (6.3), conforming to the dimensions as shown in Figure 1.
POM-C Polyoxymethylen Copolymer, trademarks e.g. DELRIN.
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oSIST prEN 16329:2021
prEN 16329:2021 (E)
Dimensions in millimetres
Key
1 rod (3 in total)
Figure 1 — Spacer

6.5 Stopper, of oil-resistant and non-thermal conductive material, having three holes to

accommodate the pipette with filter unit (6.6), the thermometer (6.9) and to allow venting of the

system, and able to ensure that pipette and thermometer are safely positioned in the test jar.

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oSIST prEN 16329:2021
prEN 16329:2021 (E)
6.6 Pipette with filter unit

6.6.1 A pipette of clear glass with a volume of (20 ± 0,2) ml at a point (149 ± 0,5) mm from the

bottom of the pipette (see Figure 2). It shall be connected to the filter unit.
Dimensions in millimetres
Figure 2 — Pipette
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oSIST prEN 16329:2021
prEN 16329:2021 (E)

6.6.2 A filter unit as in Figure 3, with general purpose metric screw threads according to ISO 261,

further consisting of a filter holder as in Figure 4 and a disc, 15 mm diameter, stainless steel wire mesh

gauze with a nominal aperture size of 45 μm in basket weave (not twill). The nominal diameter of the

wire shall be 32 μm and the tolerance for the size of an individual aperture shall be as follows

...

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