ISO 8575:2024

FINAL DRAFT
International
Standard
ISO/FDIS 8575
ISO/TC 20/SC 10
Aerospace series — Fluid systems
Secretariat: DIN
— Hydraulic system tubing
Voting begins on:
Série aérospatiale — Systèmes de fluides — Tubes pour systèmes 2024-01-01
hydrauliques
Voting terminates on:
2024-02-26
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 SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/FDIS 8575:2024(en) © ISO 2024

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FINAL DRAFT
ISO/FDIS 8575:2024(en)
International
Standard
ISO/FDIS 8575
ISO/TC 20/SC 10
Aerospace series — Fluid systems
Secretariat: DIN
— Hydraulic system tubing
Voting begins on:
Série aérospatiale — Systèmes de fluides — Tubes pour systèmes
hydrauliques
Voting terminates on:
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
COPYRIGHT PROTECTED DOCUMENT
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2024
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
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 Reference number
ISO/FDIS 8575:2023(en) © ISO 2023

© ISO 2024 – All rights reserved
ii

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ISO/FDIS 8575:2023(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 1
4.1 General .1
4.2 Pressure lines .2
4.2.1 Tubing material.2
4.2.2 Tube sizes .2
4.2.3 Qualification .2
4.3 Suction and return lin
...

2023-08-18
ISO/FDIS 8575:2023(E)
ISO/TC 20/SC 10
Secretariat: DIN
Date: 2023-12-15
Aerospace series — Fluid systems — Hydraulic system tubing
Série aérospatiale — Systèmes de fluides — Tubes pour systèmes hydrauliques
FDIS stage

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ISO/FDIS 8575:2023(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
EmailE-mail: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO 2023 – All rights reserved

ii

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ISO/FDIS 8575:2023(E)
Contents
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 1
4.1 General . 1
4.2 Pressure lines . 1
4.2.1 Tubing material . 1
4.2.2 Tube sizes . 2
4.2.3 Qualification . 2
4.3 Suction and return lines . 2
4.3.1 Tubing material . 2
4.3.2 Tube sizes . 2
Annex A (informative) Aerospace hydraulic tubing materials . 9
Bibliography . 10

© ISO 2023 – All rights reserved

iii

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ISO/FDIS 8575:2023(E)
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,
...