ISO 16332:2018

INTERNATIONAL ISO
STANDARD 16332
First edition
2018-04
Diesel engines — Fuel filters —
Method for evaluating fuel/water
separation efficiency
Moteurs diesel — Filtres à carburant — Méthode d'évaluation de
l'efficacité de séparation carburant-eau
Reference number
©
ISO 2018
© ISO 2018
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ii © ISO 2018 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 3
5 Test equipment. 3
5.1 Test fluids . 3
5.1.1 Test fuels . 3
5.1.2 Test water . . 4
5.2 Laboratory equipment . 5
5.2.1 General. 5
5.2.2 Sampling bottles and glassware . 5
5.2.3 Water detection system . 5
5.2.4 Equipment for determination of IFT . 5
5.3 Test stand . 5
5.3.1 General. 5
5.3.2 Fuel/water separator test circuit . 5
6 Test conditions .10
6.1 Volume of test fuel V .10
T
6.2 Test fuel temperature T .10
6.3 Test flow rate Q .10
T
6.4 Upstream undissolved water concentration c .10
U,up
6.4.1 General.10
6.4.2 Water injection flow rate Q .11
W
6.5 Back pressure .11
6.6 Sampling .11
6.7 Droplet size distribution DSD .11
6.8 Test duration t .11
test
7 Accuracy of measuring instruments and test conditions .11
8 Validation procedures.12
8.1 General .12
8.2 Water detection system .12
8.2.1 Inline water concentration measurement device (optional) .12
8.2.2 Karl Fischer titration sytem .12
8.3 Emulsifying device .13
8.4 Filter test circuit and water injection system .13
8.4.1 General.13
8.4.2 Validation preparation .13
8.4.3 Preconditioning cycle .14
8.4.4 Validation cycle .14
9 Simplified laboratory test .15
9.1 Test procedure .15
9.1.1 General.15
9.1.2 Pre-test preparation.15
9.1.3 Preconditioning cycle .15
9.1.4 Efficiency measurement .16
9.2 Calculation of water separation efficiency and reporting of test results .17
10 Test report .18
Annex A (normative) Fuel treatment to obtain test fuel F2 .19
Annex B (normative) Water emulsifying device .21
Annex C (normative) Conditions and parameters for the determination of the interfacial
tension according to ISO 9101, drop volume method .28
Annex D (normative) Validation of the sampling procedure for Karl Fischer titration and
centrifuge .29
Annex E (normative) Determination of the concentration c of dissolved water in saturated fuel .30
S
Annex F (informative) Typical fuel/water separator test report .31
Annex G (informative) Report round robin .33
Annex H (informative) Effect of KF-titration on the precision of water separation efficiency
measurements .42
Bibliography .44
iv © ISO 2018 – All rights reserved

Foreword
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URL: www .iso .org/iso/foreword .html
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 34,
Vehicle propulsion, powertrain, and powertrain fluids.
This document cancels and replaces the first edition ISO/TS 16332:2006 which has been technically
revised. The main changes compared to the previous edition are as follows:
— test fuel definition;
— change of IFT measurement standard and interface age;
— droplet size distribution;
— test duration;
— addition
...