ISO 13948-2:2012
(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 13948-2:2012 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 ISO 13948-2:2012.
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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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 13948-2
Second edition
2012-04-01
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 13948-2:2012(E)
©
ISO 2012
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ISO 13948-2:2012(E)
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ISO 13948-2:2012(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
5.2 Type B connection end . 6
5.3 Type C connection end . 7
6 Designation . 8
Bibliography . 11
© ISO 2012 – All rights reserved iii
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ISO 13948-2:2012(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 13948-2 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 7, Injection
equipment and filters for use on road vehicles.
This second edition cancels and replaces the first edition (ISO 13948-2:2000), which has been technically revised.
ISO 13948 consists of the following parts, under the general title Diesel engines — Fuel injection pumps and
fuel injector low-pressure connections:
— Part 1: Threaded connections
— Part 2: Non-threaded (push-on) connections
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ISO 13948-2:2012(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 International Standard attempts to provide the user with a common
set of preferred types.
This International Standard 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 2012 – All rights reserved v
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INTERNATIONAL STANDARD ISO 13948-2:2012(E)
Diesel engines — Fuel injection pumps and fuel injector low-
pressure connections —
Part 2:
Non-threaded (push-on) connections
1 Scope
This part of ISO 13948 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 part of ISO 13948.
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 referenced documents are indispensable for the application 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 7876 (all parts), Fuel injection equipment — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 7876 apply.
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 Figures 5 and 6) or moulded (see Figure 7).
Key
1 nipple
2 hose
Figure 1 — Type A connection (principle)
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ISO 13948-2:2012(E)
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 ring seals (4) around the outside diameters of the stand pipe (1) and of the mating hose (2).
An identification may be applied to indicate to the user that the hose is fully engaged (see Figure 10).
Key
1 stand pipe
2 hose
3 push-on connection
4 ring seals
Figure 2 — Type B connection (principle)
1)
4.3 Type C: “quick connector coupling” connection
Example: see Figure 3.
This design is used in conjunction with proprietary push-on “quick connector couplings” attached to the mating
male tube end form. The quick connector coupling contains one or more O-ring seals to seal along the male
tube end outer surface, and a latching device to engage with the collar diameter feature.
The male tube end form is shown in Figure 11 and the dimensions are defined in Tables 4 and 5.
Key
1 male tube end
2 female connection end
3 stem
4 quick connector coupling
5 section of hose or tube
Figure 3 — Type C connection (principle)
1) As specified in SAE J2044.
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