ISO 13948-2:2016
(Main)Diesel engines — Fuel injection pumps and fuel injector low-pressure connections — Part 2: Non-threaded (push-on) connections
Diesel engines — Fuel injection pumps and fuel injector low-pressure connections — Part 2: Non-threaded (push-on) 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 — Partie 2: Raccords non filetés (à pression)
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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 2016
© 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.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
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
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
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.
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).
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
...
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 2016
© 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.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
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
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
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.
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).
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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