ISO 11639:2010

INTERNATIONAL ISO
STANDARD 11639
First edition
2010-06-01
Aerospace — Part numbering for hose
assemblies
Aéronautique et espace — Numerotation des éléments de systèmes de
tuyauterie
Reference number
©
ISO 2010
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ii © ISO 2010 – All rights reserved

Contents Page
Foreword .iv
1 Scope.1
2 Terms and definitions .1
3 Construction of part numbers.1
3.1 Part number length.1
3.2 Basic numbers.1
3.3 Size codes .1
3.4 Assembly length codes .2
3.5 Assembly length tolerances.3
3.6 Fitting type codes.4
3.7 Fitting configuration codes .4
3.8 Orientation codes.5
3.9 General requirements .5
3.10 Limitations .6
4 Complex numbers .6
4.1 General .6
4.2 Hose assembly option codes.6
4.3 Sleeving Codes.7
5 Hose assembly part numbering guidelines.8
5.1 15-digit part numbers.8
5.2 20-digit part numbers.8

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 11639 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee
SC 10, Aerospace fluid systems and components.

iv © ISO 2010 – All rights reserved

INTERNATIONAL STANDARD ISO 11639:2010(E)

Aerospace — Part numbering for hose assemblies
1 Scope
This International Standard specifies a hose-assembly designation system and presents a part numbering
scheme for aerospace fluid-system hose assemblies.
Standardization on certain numbering systems provides for numbering simplicity, ease of interchangeability,
and the suppression (as required), standardization and limitation of usable codes.
2 Terms and definitions
For the purposes of this document the following terms and definitions apply.
2.1
basic standard number
stem number
number that is the drawing specification or standard number for a part or family of parts
2.2
dash number
all digits of a part number, other than the basic standard number, used to define and differentiate individual
part configurations with the standard
2.3
non-significant dash number
dash number that is numerical, sequential and contains no coding
2.4
digit
number, alpha character or symbol that occupies a space within a part number
3 Construction of part numbers
3.1 Part number length
To the maximum extent possible, part numbers should be limited in length to 15 digits. Part numbers up to
20 digits in length are acceptable, if required to fully differentiate part numbers.
3.2 Basic numbers
It is recommended that the basic standard number be a maximum of seven digits in length.
3.3 Size codes
Size codes for hose assemblies shall be in ac
...