Diesel engines -- Fuel injection pumps and fuel injector low-pressure connections

ISO 13948-2:2016 specifies requirements for the connection ends of push-on connections used with fuel injection equipment. Three types of push-on connections (types A, B and C) are described in this document.

Moteurs diesels -- Raccords basse pression pour pompes d'injection de combustible et porte-injecteurs de combustible complets

General Information

Status
Published
Publication Date
07-Dec-2016
Current Stage
9020 - International Standard under periodical review
Start Date
15-Oct-2021
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ISO 13948-2:2016 - Diesel engines -- Fuel injection pumps and fuel injector low-pressure connections
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INTERNATIONAL ISO
STANDARD 13948-2
Third edition
2016-12-15
Diesel engines — Fuel injection
pumps and fuel injector low-pressure
connections —
Part 2:
Non-threaded (push-on) connections
Moteurs diesels — Raccords basse pression pour pompes d’injection
de combustible et porte-injecteurs de combustible complets —
Partie 2: Raccords non filetés (à pression)
Reference number
ISO 13948-2:2016(E)
ISO 2016
---------------------- Page: 1 ----------------------
ISO 13948-2:2016(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland

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

the requester.
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copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 13948-2:2016(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Connection designs and applications ............................................................................................................................................. 1

4.1 Type A: nipple connection ............................................................................................................................................................. 1

4.2 Type B: stand pipe connection .................................................................................................................................................. 2

4.3 Type C: “quick connector coupling” connection......................................................................................................... 2

5 Dimensions and surface quality ........................................................................................................................................................... 3

5.1 Type A connection ends .................................................................................................................................................................. 3

5.1.1 Nipple types ......................................................................................................................................................................... 3

5.1.2 Basic dimensions and tolerances....................................................................................................................... 5

5.1.3 Radii ............................................................................................................................................................................................ 6

5.1.4 Surface quality ................................................................................................................................................................... 6

5.2 Type B connection end ..................................................................................................................................................................... 7

5.3 Type C connection end ..................................................................................................................................................................... 8

6 Designation .............................................................................................................................................................................................................11

Bibliography .............................................................................................................................................................................................................................12

© ISO 2016 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 13948-2:2016(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 World Trade Organization (WTO) principles in the

Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.

The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 34,

Propulsion, powertrain and powertrain fluids.

This third edition cancels and replaces the second edition (ISO 13948-2:2012), which has been

technically revised with the following changes:

— a normative reference has been made to ISO 4288 for the measurement of surface texture.

A list of all the parts in the ISO 13948 series can be found on the ISO website.
iv © ISO 2016 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 13948-2:2016(E)
Introduction

It is recognized that a large variety of low-pressure connections exist on fuel injection equipment,

using different sealing principles, as well as designs. This document attempts to provide the user with a

common set of preferred types.

This document is divided into two parts, covering threaded connections (ISO 13948-1) and non-

threaded (push-on) connections (ISO 13948-2) for use with low-pressure fuel supply and return, boost

air pressure and lubricating oil supply and return.
© ISO 2016 – All rights reserved v
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 13948-2:2016(E)
Diesel engines — Fuel injection pumps and fuel injector
low-pressure connections —
Part 2:
Non-threaded (push-on) connections
1 Scope

This document specifies requirements for the connection ends of push-on connections used with fuel

injection equipment.

Three types of push-on connections (types A, B and C) are described in this document.

NOTE Low-pressure connections to fuel filters are covered in other International Standards; see the

bibliography. High-pressure end-connections for pumps and injectors are covered in ISO 2974 and ISO 13296.

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 4288, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Rules and

procedures for the assessment of surface texture.
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 7876 (all parts) 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 Connection designs and applications
4.1 Type A: nipple connection
EXAMPLE See Figure 1.

This design is intended for use directly with the mating hose (2) or in conjunction with a retaining clip

around the hose (not shown) for a more secure connection.

The nipple (1) can be machined (see Figure 4), formed (see Figure 5 and Figure 6) or moulded (see

Figure 7).
© ISO 2016 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO 13948-2:2016(E)
Key
1 nipple
2 hose
Figure 1 — Type A connection (principle)
4.2 Type B: stand pipe connection
EXAMPLE See Figure 2.

This design is used in conjunction with proprietary push-on connections (3) attached to the mating

hose (2) that seals by compressing rin
...

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