ISO 6772:2012

Aerospace — Fluid systems — Impulse testing of hydraulic hose, tubing and fitting assemblies

This International Standard specifies the requirements and the procedures for impulse testing of hose, tubing, and fitting assemblies for use in aerospace hydraulic systems. Requirements may apply, when appropriate, to components used in other aerospace fluid systems.

Aéronautique et espace — Systèmes de fluides — Essai d'impulsion des tuyauteries flexibles, tubes et raccords

General Information

• Status: Published
• Publication Date: 23-Sep-2012
• ICS: 49.080 - Aerospace fluid systems and components
• ICS: 83.140.40 - Hoses
• Technical Committee: ISO/TC 20/SC 10 - Aerospace fluid systems and components
• Drafting Committee: ISO/TC 20/SC 10/WG 6 - Couplings for rigid pipe
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 03-Jul-2018

Relations

• Revises: ISO 6772:1988 - Aerospace — Fluid systems — Impulse testing of hydraulic hose, tubing and fitting assemblies
• Effective Date: 30-May-2009

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 6772
Third edition
2012-10-01
Aerospace — Fluid systems — Impulse
testing of hydraulic hose, tubing and
fitting assemblies
Aéronautique et espace — Systèmes de fluides — Essai d’impulsion
des tuyauteries flexibles, tubes et raccords
Reference number
ISO 6772:2012(E)
ISO 2012
---------------------- Page: 1 ----------------------
ISO 6772:2012(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2012

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any

means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the

address below or ISO’s member body in the country of the requester.
ISO copyright office
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Published in Switzerland
ii © ISO 2012 – All rights reserved
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ISO 6772:2012(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Requirements .......................................................................................................................................................................................................... 1

4.1 Shape of impulse trace ..................................................................................................................................................................... 1

4.2 Calculation of pressure rise ......................................................................................................................................................... 2

4.3 Preparation of specimens .............................................................................................................................................................. 2

4.4 Test fluid ....................................................................................................................................................................................................... 3

5 Principle of test ...................................................................................................................................................................................................... 3

6 Test method ............................................................................................................................................................................................................... 3

7 Intended use.............................................................................................................................................................................................................. 4

7.1 Standard ........................................................................................................................................................................................................ 4

7.2 Reference ..................................................................................................................................................................................................... 4

Bibliography ................................................................................................................................................................................................................................ 6

© ISO 2012 – All rights reserved iii
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ISO 6772:2012(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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International

Standards adopted by the technical committees are circulated to the member bodies for voting.

Publication as an International Standard requires approval by at least 75 % of the member bodies

casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 6772 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee

SC 10, Aerospace fluid systems and components.

This third edition cancels and replaces the second edition (ISO 6772:1988), which has been technically

revised. The main changes are as follows:
— 3.2: definition has been modified;
— Clause 5: new paragraph has been added;
— Tables 1, 2 and 3 have been modified to cover additional classes J and K.
iv © ISO 2012 – All rights reserved
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ISO 6772:2012(E)
Introduction

In hydraulic systems, power is transmitted through the hydraulic fluid under pressure with a network of

tubing and hoses, and their attendant fitting assemblies. In order to demonstrate that these transmission

elements are fit for purpose in terms of the prevention of premature failures due to fatigue, it is necessary

to conduct appropriate impulse pressure testing.

This document provides the overall requirements for pressure impulse testing of hydraulic system

distribution elements.
© ISO 2012 – All rights reserved v
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INTERNATIONAL STANDARD ISO 6772:2012(E)
Aerospace — Fluid systems — Impulse testing of hydraulic
hose, tubing and fitting assemblies
1 Scope

This International Standard specifies the requirements and the procedures for impulse testing of hose,

tubing, and fitting assemblies for use in aerospace hydraulic systems. Requirements may apply, when

appropriate, to components used in other aerospace fluid systems.
2 Normative references
The following documents, in whole or
...