ISO 13296:2016

INTERNATIONAL ISO
STANDARD 13296
Fourth edition
2016-12-15
Diesel engines — High-pressure fuel
injection pipe assemblies — General
requirements and dimensions
Moteurs diesels — Lignes assemblées d’injection de carburant à haute
pression — Exigences générales et dimensions
Reference number
©
ISO 2016
© ISO 2016, Published in Switzerland
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ii © ISO 2016 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Dimensions and tolerances . 1
5 Cleanliness . 3
6 Minimum bend radii . 3
7 Pipe end connections . 3
7.1 General . 3
7.2 Types of connection ends . 3
7.3 Pipe end assembly for integral 60° female cones. 4
7.4 Pipe end assembly for fabricated 60° female cones . 6
7.5 Bore entrance configuration . 8
8 Assembly clamps . 8
9 External coatings . 9
10 Operating pressure . 9
11 Pipe inside diameter . 9
12 Tightening torque and sealing performance . 9
13 Packaging and identification . 9
Annex A (normative) Operating pressure .10
Bibliography .11
Foreword
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The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 34,
Propulsion, powertrain, and powertrain fluids.
This fourth edition cancels and replaces the third edition (ISO 13296:2012), which has been technically
revised by making normative reference to ISO 4288 for the measurement of surface texture.
iv © ISO 2016 – All rights reserved

INTERNATIONAL STANDARD ISO 13296:2016(E)
Diesel engines — High-pressure fuel injection pipe
assemblies — General requirements and dimensions
1 Scope
This document specifies dimensions and requirements for high-pressure fuel injection pipe assemblies
and assembled pipe sets for both integral and fabricated 60° female cones used on diesel (compression-
ignition) engines.
NOTE Dimensions of integral and fabricated 60° female cone connectors are specified in ISO 2974.
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 2974:2011, Diesel engines — 60° female cones for high-pressure fuel injection components
ISO 4288, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Rules and
procedures for the assessment of surface texture
ISO 8535-1:2011, Diesel engines — Steel tubes for high-pressure fuel injection pipes — Part 1: Requirements
for seamless cold-drawn single-wall tubes
ISO 8535-2:2003, Compression-ignition engines — Steel tubes for high-pressure fuel injection pipes —
Part 2: Requirements for composite tubes
ISO 12345, Diesel engines — Cleanliness assessment of fuel injection equipment
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 7876-4 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
4 Dimensions and tolerances
The requirement and configuration drawing for a pipe assembly shall include at least the following:
a) an indication of compliance with this document, i.e. ISO 13296;
b) the outside diameter and inside diameter of the pipe and an indication of compliance with
ISO 8535-1 or ISO 8535-2;
c) the thread and the hexagon size of the connector nuts according to Table 2 or Table 4;
d) the type of connection ends as specified in 7.2;
e) a graphic representation of the centre-line of the pipe with the connection ends and each bend
intersection labelled as a point, with each point listed in a table with Cartesian coordinates x, y and
z with the orthogonal distance from the axis and the bend radius (the beginning and end points are
given as the “S” dimension for the defined configuration);
NOTE The coordinates are used to specify the theoretical exact centre-line of the pipe. See the example
given in Figure 1.
f) the developed length of the pipe as an approximated value;
g) the material and surface finish requirements of the pipe and connector nuts according to ISO 8535-1
or ISO 8535-2.
The dimensional tolerance of a pipe assembly shall be stated in terms of the actual outside contour
of the tube in relation to the specified maximum outside contour and the variance of the actual pipe
connection end from the specified position, as agreed between supplier and customer.
Dimensions in millimetres
Point x y z Radius
A 0 0 0 0
B 65 0 0 15
C 65 100 0 15
D 140 100 0 15
E 140 150 0 15
F 40 150 0 15
G 40 185 0 0
Key
1 connector nut: thread M12; hexagon across flats 17
2 pipe: tube outside diameter 6 mm
3 connector nut: thread M14; hexagon across flats 19
4 pipe connection ends: both of Type C
a
Developed length.
Figure 1 — Example of a requirement and configuration drawing
2 © ISO 2016 – All rights reserved

5 Cleanliness
The bore of a high-pressure fuel injection pipe assembly shall be clean, and this shall be assessed in
accordance with ISO 12345. Unless otherwise agreed between supplier and customer, cleanliness of
pipe assemblies shall be designated using the Fuel Injection Equipment Cleanliness Code (FIECC), as
defined in ISO 12345.
6 Minimum bend radii
The radius of any bend made in fabricating high-pressure pipe assemblies shall be not less than two and
a half times (2,5×) the outside diameter of the pipe as measured from the pipe centre-line. Bends shall
be a sufficient distance from the end connections so as to allow easy fitting of the pipe assembly for its
intended use. Bends shall be a sufficient distance from one another so as not to impair fabrication. Bend
radii shall be of uniform size in each pipe assembly, whenever possible.
7 Pipe end connections
7.1 General
The relationships of connection ends to the connector nut and with the dimensions G and S are shown
in Table 1 for the integral 60° female cone and in Table 3 for the fabricated 60° female cone.
The design of the shoulders of the connection end and of the related
...