Gasoline engines -- Medium pressure liquid fuel supply connections

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

General Information

Status
Published
Publication Date
12-Nov-2014
Current Stage
6060 - International Standard published
Start Date
22-Aug-2014
Completion Date
13-Nov-2014
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ISO 18418-2:2014 - Gasoline engines -- Medium pressure liquid fuel supply connections
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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
---------------------- Page: 1 ----------------------
ISO 18418-2:2014(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2014

All rights reserved. Unless otherwise specified, 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

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Published in Switzerland
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

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 on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers

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
---------------------- Page: 4 ----------------------
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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