ISO 14624-5:2023

ISO/FDIS 14624-5:20222023(E)
2022-07-13
ISO/TC 20/SC 14
Secretariat: ANSI
2023-02-16

Space systems — Safety and compatibility of materials — Part 5: Determination of
reactivity of system or /component materials with aerospace propellants
Systèmes spatiaux — Sécurité et compatibilité des matériaux — Partie 5: Détermination de la
réactivité des matériaux des systèmes/composants avec les ergols spatiaux

---------------------- Page: 1 ----------------------
ISO/FDIS 14624-5:2023(E)
© ISO 20222023
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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 20222023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/FDIS 14624-5:2023(E)
Contents Page
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Fluid transfer, storage, and flight systems . 2
4.1 General . 2
4.2 Test criteria . 2
4.3 Sample . 3
4.4 Test system . 3
4.5 Procedure . 4
4.6 Precision . 6
4.7 Good laboratory practices . 6
Annex A (informative) Example forms . 7
Bibliography. 11
© ISO 20222023 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO/FDIS 14624-5:2023(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, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directiveswww.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patentswww.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation onof the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.htmlwww.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles,
Subcommittee SC 14, Space systems and operations.
This second edition cancels and replaces the first edition (ISO 14624-5:2006), which has been
technically revised.
The main changes are as follows:
— Updatedupdated sections of Clause 4.
A list of all parts in the ISO 14624 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv © ISO 20222023 – All rights reserved

---------------------- Page: 4 ----------------------
ISO/FDIS 14624-5:2023(E)
Introduction
This purpose of this document is to identify changes resulting from exposure of a material to an
aerospace fluid that renders either the material or the fluid unsuitable for use.

This document maycan be used to determine the reactivity of system and component materials with
aerospace fluids.
While this procedure is an excellent quick screen test for long-term propellant compatibility, it is semi-
qualitative, and (if exposures exceed 12 months) long-term tests need to be used to quantify
degradation as a function of time under use conditions.
© ISO 20222023 – All rights reserved v

---------------------- Page: 5 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 14624-5:20222023(E)

Space systems — Safety and compatibility of materials —
Part 5:
Determination of reactivity of system/component materials with
aerospace propellants
1 Scope
This document specifies test equipment and techniques used to identify interactions resulting from
exposure of a material to an aerospace fluid.
It is applicable for determining interactive reactions between propellants and materials used in the
design, construction, and operation of propellant storage, transfer, and flight systems. Normative
references

32 2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 4954, Steels for cold heading and cold extruding
ISO 15859-3, Space systems — Fluid characteristics, sampling and test methods — Part 3: Nitrogen
43 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obphttps://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/https://www.electropedia.org/
3.1
degradation
adverse physical or chemical change in a substance
3.2
immersion test
test in which the fluid covers the entire sample for the duration of the test
3.3
propellant
fluid, such as hydrazine and monomethylhydrazine, and oxidizer usually used for space projects
© ISO 20222023 – All rights reserved 1

---------------------- Page: 6 ----------------------
ISO/FDIS 14624-5:2023(E)
3.4
reaction
chemical change in which a substance decomposes, combines with other substances, or interchanges
constituents with other substances
54 Fluid transfer, storage, and flight systems
5.14.1 General
5.1.14.1.1 Procedure
This procedure is applicable for determining interactive reactions between propellants and materials
used in the design, construction, and operation of propellant storage, transfer, and flight systems. The
sample is immersed in the test fluid for 48 h at the maximum system temperature or 71 °C, whichever is
higher. This accelerated test provides semi-qualitative information. Tests used to evaluate the long-
term interaction of materials with reactive fluids shall be conducted for a period of time no less than
that of the anticipated time of use.
5.1.24.1.2 Safety
The proper safety equipment shall be worn by the technician performing the test. A face shield, gloves,
and a laboratory coat or apron shall be worn when handling the test fluids.
Test fluids shall be handled by engineering controls (e.g.,. operational fume hood) or as directed by the
appropriate Safety Data Sheetssafety data sheets for the test fluids.
The laboratory conducting the tests shall have a detailed emergency plan in the event of a runaway
reaction.
5.24.2 Test criteria
5.2.14.2.1 Screening test
Exposure of the material (screening test) to the fluid for 2 h at ambient temperature and pressure shall
not visibly change either the material or the fluid.
5.2.24.2.2 Immersion test
[1]1
The standard test temperature for the hydrazine propellants (see ISO 14951-6 and ISO 14951-7
[2 ]2
]) ) is (71 ± 3) °C. This temperature shall be used when the intent of the test is ranking of materials or
comparison to literature information. Ot
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 14624-5
ISO/TC 20/SC 14
Space systems — Safety and
Secretariat: ANSI
compatibility of materials —
Voting begins on:
2023-03-02
Part 5:
Voting terminates on:
Determination of reactivity of system/
2023-04-27
component materials with aerospace
propellants
Systèmes spatiaux — Sécurité et compatibilité des matériaux —
Partie 5: Détermination de la réactivité des matériaux des systèmes/
composants avec les ergols spatiaux
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
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 14624-5:2023(E)
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. © ISO 2023

---------------------- Page: 1 ----------------------
ISO/FDIS 14624-5:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 14624-5
ISO/TC 20/SC 14
Space systems — Safety and
Secretariat: ANSI
compatibility of materials —
Voting begins on:
Part 5:
Voting terminates on:
Determination of reactivity of system/
component materials with aerospace
propellants
Systèmes spatiaux — Sécurité et compatibilité des matériaux —
Partie 5: Détermination de la réactivité des matériaux des systèmes/
composants avec les ergols spatiaux
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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: +41 22 749 01 11
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: copyright@iso.org
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 14624-5:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023

---------------------- Page: 2 ----------------------
ISO/FDIS 14624-5:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Fluid transfer, storage and flight systems . 2
4.1 General . 2
4.1.1 Procedure . 2
4.1.2 Safety . 2
4.2 Test criteria . 2
4.2.1 Screening test . . 2
4.2.2 Immersion test . 2
4.2.3 Post-test analysis . 2
4.3 Sample . 3
4.3.1 Receiving inspection . 3
4.3.2 Sample preparation . 3
4.3.3 Sample cleaning . . 3
4.3.4 Sample inspection . 3
4.4 Test system . 3
4.4.1 Screening test . . 3
4.4.2 Immersion test . 3
4.5 Procedure . 4
4.5.1 Before testing . 4
4.5.2 Test . . . 5
4.5.3 Post-test analysis . 5
4.6 Precision . . . 6
4.7 Good laboratory practices . 6
Annex A (informative) Example forms . 7
Bibliography .10
iii
© ISO 2023 – All rights reserved

---------------------- Page: 3 ----------------------
ISO/FDIS 14624-5:2023(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, the different approval criteria needed for the
different types of ISO documents 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).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles,
Subcommittee SC 14, Space systems and operations.
This second edition cancels and replaces the first edition (ISO 14624-5:2006), which has been
technically revised.
The main changes are as follows:
— updated sections of Clause 4.
A list of all parts in the ISO 14624 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
  © ISO 2023 – All rights reserved

---------------------- Page: 4 ----------------------
ISO/FDIS 14624-5:2023(E)
Introduction
This purpose of this document is to identify changes resulting from exposure of a material to an
aerospace fluid that renders either the material or the fluid unsuitable for use.
This document can be used to determine the reactivity of system and component materials with
aerospace fluids.
While this procedure is an excellent quick screen test for long-term propellant compatibility, it is
semi-qualitative, and (if exposures exceed 12 months) long-term tests need to be used to quantify
degradation as a function of time under use conditions.
v
© ISO 2023 – All rights reserved

---------------------- Page: 5 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 14624-5:2023(E)
Space systems — Safety and compatibility of materials —
Part 5:
Determination of reactivity of system/component
materials with aerospace propellants
1 Scope
This document specifies test equipment and techniques used to identify interactions resulting from
exposure of a material to an aerospace fluid.
It is applicable for determining interactive reactions between propellants and materials used in the
design, construction, and operation of propellant storage, transfer, and flight systems.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 4954, Steels f
...