ISO 7204:2023

INTERNATIONAL ISO
STANDARD 7204
First edition
Specification for wetting agents for
application on Class A fires
PROOF/ÉPREUVE
Reference number
ISO 7204:2023(E)
© ISO 2023

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ISO 7204:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
PROOF/ÉPREUVE © ISO 2023 – All rights reserved

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ISO 7204:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope .1
2 Normative references .1
3 Terms and definitions .1
4 Type and use of wetting agent concentrates .2
4.1 General . 2
4.2 Use with sea water . 2
5 Tolerance of the wetting agent concentrate to freezing and thawing .2
6 Sediment in the wetting agent concentrate . 3
6.1 Sediment before conditioning . 3
6.2 Sediment after conditioning . 3
7 Determination of viscosity .3
7.1 Newtonian wetting agent concentrates . 3
7.2 Pseudo-plastic wetting agent concentrates . 3
8 pH of the wetting agent concentrate . 3
8.1 pH limits . 3
8.2 After conditioning . 3
9 Surface tension of the wetting agent solution . 3
9.1 Before conditioning . 3
9.2 After conditioning .
...

ISO/DIS PRF 7204:2023(E)
Date: 2023-02-27
ISO/TC 21/SC 6
Secretariat: SAC
Date: 2023-09-12
Specification for wetting agents for application on Class A fires
FDIS stage

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ISO/DIS PRF 7204:20222023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this
publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical,
including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can
be requested from either ISO at the address below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Email: E-mail: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ii © ISO 2022 – All rights reserved
 © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/DIS PRF 7204:20222023(E)
Contents
Foreword . v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Type and use of wetting agent concentrates . 2
4.1 General . 2
4.2 Use with sea water . 3
5 Tolerance of the wetting agent concentrate to freezing and thawing . 3
6 Sediment in the wetting agent concentrate . 3
6.1 Sediment before conditioning . 3
6.2 Sediment after conditioning . 3
7 Determination of viscosity . 3
7.1 Newtonian wetting agent concentrates . 3
7.2 Pseudo-plastic wetting agent concentrates . 3
8 pH of the wetting agent concentrate . 4
8.1 pH limits . 4
8.2 After conditioning . 4
9 Surface tension of the wetting agent solution . 4
9.1 Before conditioning . 4
9.2 After conditioning . 4
10 Test fire performance . 4
11 Corrosion .
...