Foreword

Introduction

1Scope

2Normative references

3Terms and definitions

4Symbols

5Test equipment

5.1Test fluids

5.1.1Test fuels

5.1.2Test water

5.2Laboratory equipment

5.2.1General

5.2.2Sampling bottles and glassware

5.2.3Water detection system

5.2.3.1Karl Fischer (KF) titrator

5.2.3.2Centrifuge

5.2.4Equipment for determination of IFT

5.3Test stand

5.3.1General

5.3.2Fuel/water separator test circuit

5.3.2.1Fuel sump (1)

5.3.2.2Water sump (6)

5.3.2.3Heat exchanger (3)

5.3.2.4Test pump (2)

5.3.2.5Water injection pump (7)

5.3.2.6Fuel flow meter (5a)

5.3.2.7Water flow meter (5b)

5.3.2.8Injection device (8)

5.3.2.9Water emulsifying device (9)

5.3.2.10Operating pressure gauge (10)

5.3.2.11Differential pressure gauges (11)

5.3.2.12Upstream sampling point (12)

5.3.2.13Temperature indicator (13)

5.3.2.14Water drainage system (15)

5.3.2.15Back pressure gauge (16)

5.3.2.16Back pressure control valve (17) (optional equipment)

5.3.2.17Downstream sampling point (18)

5.3.2.18Clean-up system (19)

5.3.2.19Droplet size distribution measurement device (20)

5.3.2.20Bypass line (21)

5.3.2.21Inline water concentration measurement device (22) (Optional equipment)

5.3.2.22General requirements on the hydraulic piping system

6Test conditions

6.1Volume of test fuel V

6.2Test fuel temperature T

6.3Test flow rate Q

6.4Upstream undissolved water concentration c

6.4.1General

6.4.2Water injection flow rate Q

6.5Back pressure

6.6Sampling

6.7Droplet size distribution DSD

6.8Test duration t

7Accuracy of measuring instruments and test conditions

8Validation procedures

8.1General

8.2Water detection system

8.2.1Inline water concentration measurement device (optional)

8.2.2Karl Fischer titration sytem

8.3Emulsifying device

8.4Filter test circuit and water injection system

8.4.1General

8.4.2Validation preparation

8.4.3Preconditioning cycle

8.4.4Validation cycle

9Simplified laboratory test

9.1Test procedure

9.1.1General

9.1.2Pre-test preparation

9.1.3Preconditioning cycle

9.1.4Efficiency measurement

9.2Calculation of water separation efficiency and reporting of test results

10Test report

Annex AFuel treatment to obtain test fuel F2 (normative)

Annex BWater emulsifying device (normative)

B.1Calibrated orifice design details

B.2Calibrated orifices concept

B.3DSD generated by orifices

B.4Water emulsifying device calibration procedure

Annex CConditions and parameters for the determination of the interfacial tension according to ISO 9101, drop volume method (normative)

Annex DValidation of the sampling procedure for Karl Fischer titration and centrifuge (normative)

D.1Karl Fischer titration (manual sampling)

D.1.1Primary sampling procedure

D.1.2Secondary sampling procedure

D.1.3Secondary sampling procedure validation

D.2Karl Fischer titration (automated sampling)

D.3Centrifuge

Annex EDetermination of the concentration c of dissolved water in saturated fuel (normative)

Annex FTypical fuel/water separator test report (informative)

Annex GReport round robin (informative)

Annex HEffect of KF-titration on the precision of water separation efficiency measurements (informative)

Bibliography