ISO 8504-5:2024
(Main)Preparation of steel substrates before application of paints and related products — Surface preparation methods — Part 5: Water jet cleaning
Preparation of steel substrates before application of paints and related products — Surface preparation methods — Part 5: Water jet cleaning
This document specifies water jet cleaning methods for the removal of the existing coatings and rust during surface preparation of steel surfaces before application of paints and related products. It provides information on the effectiveness of the individual methods and their fields of application. It also describes the equipment and the procedures to follow.
Préparation des subjectiles d'acier avant application de peintures et de produits assimilés — Méthodes de préparation des subjectiles — Partie 5: Nettoyage au jet
General Information
Standards Content (Sample)
International
Standard
ISO 8504-5
First edition
Preparation of steel substrates
2024-09
before application of paints
and related products — Surface
preparation methods —
Part 5:
Water jet cleaning
Préparation des subjectiles d'acier avant application de peintures
et de produits assimilés — Méthodes de préparation des
subjectiles —
Partie 5: Nettoyage au jet
Reference number
© ISO 2024
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Published in Switzerland
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Health and safety . 2
4.1 General requirements .2
5 Consideration of water jetting pressure and flow parameters . 2
5.1 General .2
5.2 Methods .2
5.2.1 General .2
5.2.2 Cleaning with low-pressure water (LP WC) .3
5.2.3 Cleaning with high-pressure water (HP WC) .3
5.2.4 Cleaning with high-pressure water jetting (HP WJ) .3
5.2.5 Cleaning with very high-pressure water jetting (VHP WJ) .3
5.2.6 Cleaning with ultra high-pressure water jetting (UHP WJ) .4
6 Components . 4
6.1 General .4
6.2 Pump . .5
6.3 Hose and fittings .5
6.4 Water path .5
6.5 Vacuum recovery .5
6.6 Water quality .5
6.7 Manual guns .5
6.8 Remote gun or wall-deck cleaning heads .5
6.9 Nozzle .6
6.10 Containment (management of water) .6
7 Systems . 6
7.1 Continuous system .6
7.2 Pulsed (disrupted) system .6
8 System operation . 6
8.1 General .6
8.2 Interactive parameters for productivity .7
8.3 Additives .7
8.4 Maintenance coating work .8
8.5 Maintenance of pump .8
8.6 Pressure drop in the hydraulic system .8
8.7 Positioning of the gun.8
9 Procedure . 8
9.1 Preparation before water jetting .8
9.2 During water jetting .8
9.2.1 Selection of initial condition .8
9.2.2 Selection of preparation grade .9
9.2.3 Selection of water jetting method .9
9.2.4 Selection of water jetting system .9
9.3 After water jetting and before applying coatings .9
10 A ssessment of the cleaned surface . 9
10.1 Selection of preparation grade .9
10.2 Field test .9
10.3 Organic contaminants . .10
10.4 Visual .10
iii
10.4.1 Visual assessment of preparation grade .10
10.4.2 Flash rust .10
10.5 Non-visible inorganics contaminants .10
10.6 Third-party representation .10
10.7 Conformity .10
Annex A (normative) Pressure levels .11
Annex B (informative) High-pressure /Ultra high-pressure water jetting: theoretical and
practical information .12
Annex C (informative) Flash rust guidance. 14
Bibliography .15
iv
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.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this
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