ISO 18418-2:2014
(Main)Gasoline engines — Medium pressure liquid fuel supply connections — Part 2: Pipe assemblies
Gasoline engines — Medium pressure liquid fuel supply connections — Part 2: Pipe assemblies
ISO 18418-2:2014 specifies dimensions and requirements for medium-pressure fuel pipe assemblies and assembled pipe sets made of seamless stainless steel tubing to be used with 60° female cone connectors on gasoline (spark-ignition) engines.
Moteurs à essence — Connexions pour des lignes de combustible liquide à moyenne pression — Partie 2: Lignes assemblées
General Information
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 18418-2
First edition
2014-11-15
Gasoline engines — Medium pressure
liquid fuel supply connections —
Part 2:
Pipe assemblies
Moteurs à essence — Connections pour des lignes de combustible
liquide à moyenne pression —
Partie 2: Lignes assemblées
Reference number
ISO 18418-2:2014(E)
©
ISO 2014
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ISO 18418-2:2014(E)
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ii © ISO 2014 – All rights reserved
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ISO 18418-2:2014(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Dimensions and tolerances . 1
4 Cleanliness . 3
5 Minimum bend radii . 3
6 Pipe end connections . 3
6.1 General . 3
6.2 Type of connection ends . 3
6.3 Pipe end assembly for 60° female cones. 4
7 Operating pressure . 5
8 Ovality of bending portion . 5
9 Tightening torque and sealing performance . 5
10 Designation . 6
11 Packaging and identification . 6
Bibliography
. 7
© ISO 2014 – All rights reserved iii
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ISO 18418-2:2014(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
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electrotechnical standardization.
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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).
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on the ISO list of patent declarations received (see www.iso.org/patents).
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to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 7, Injection
equipment and filters for use on road vehicles.
ISO 18418 consists of the following parts, under the general title Gasoline engines — Medium pressure
liquid fuel supply connections:
— Part 1: 60° female cone connectors
— Part 2: Pipe assemblies
iv © ISO 2014 – All rights reserved
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ISO 18418-2:2014(E)
Introduction
Some spark ignition (SI) engines use direct injection (DI) fuel systems which supply gasoline under
pressure to a rail and to the injectors via pipe assemblies with a 60° female cone connector. Such
components are similar to ISO 2974 and ISO 13296 for the diesel injection systems except for the
relationship between the outside and inside diameters of the pipes due to the lower pressure range.
© ISO 2014 – All rights reserved v
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INTERNATIONAL STANDARD ISO 18418-2:2014(E)
Gasoline engines — Medium pressure liquid fuel supply
connections —
Part 2:
Pipe assemblies
1 Scope
This part of ISO 18418 specifies dimensions and requirements for medium-pressure fuel pipe assemblies
and assembled pipe sets made of seamless stainless steel tubing to be used with 60° female cone
connectors on gasoline (spark-ignition) engines.
NOTE 1 Dimensions of 60° female cone connectors are specified in ISO 18418-1.
NOTE 2 Material properties of stainless steel tubing are specified in ISO 9329-4. The chemical composition of
stainless steels can be found in ISO 15510.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 9329-4:1997, Seamless steel tubes for pressure purposes — Technical delivery conditions — Part 4:
Austenitic stainless steels
ISO 12345, Diesel engines — Cleanliness assessment of fuel injection equipment
ISO 15510:2014, Stainless steels — Chemical composition
ISO 18418-1:2014, Gasoline engines — Medium pressure liq
...
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