ISO 12151-2:2022
(Main)Connections for hydraulic fluid power and general use — Hose fittings — Part 2: Hose fittings with ISO 8434-1 24° cone connector ends with O-rings
Connections for hydraulic fluid power and general use — Hose fittings — Part 2: Hose fittings with ISO 8434-1 24° cone connector ends with O-rings
This document specifies the general and dimensional requirements for the design and performance of hose fittings with 24° cone connector ends with O-rings according to ISO 8434‑1. These hose fittings are made of carbon steel and are intended for use with hoses with nominal inside diameters from 5 mm through 38 mm (inclusive). NOTE For hose fittings used in hydraulic and pneumatic braking systems on road vehicles, see ISO 4038, ISO 4039‑1 and ISO 4039‑2. These hose fittings are for use in hydraulic fluid power systems with hoses that meet the requirements of respective hose standards and in general applications with suitable hoses.
Raccordements pour transmissions hydrauliques et applications générales — Flexibles de raccordement — Partie 2: Flexibles avec embouts à cône à 24 degrés et joints toriques conformes à l'ISO 8434-1
Fluidna tehnika - Hidravlika - Spoji za fluidno tehniko in za splošno uporabo - Cevne armature - 2. del: Cevne armature s konusom 24° po ISO 8434-1 in s tesnilkami O
Ta dokument določa splošne in dimenzijske zahteve glede zasnove in zmogljivosti cevnih armatur s 24° stožčastimi priključnimi konci z O-obročki v skladu s standardom ISO 8434-1. Te cevne armature so izdelane iz ogljikovega jekla in so namenjeni uporabi s cevmi z nazivnim notranjim premerom od 5 mm do 38 mm (vključno).
OPOMBA: Za cevne armature, ki se uporabljajo v hidravličnih in pnevmatskih zavornih sistemih cestnih vozil, glej standarde ISO 4038, ISO 4039-1 in ISO 4039-2.
Te cevne armature so namenjene uporabi v hidravličnih pogonskih sistemih s cevmi, ki izpolnjujejo zahteve ustreznih standardov za cevi, in z ustreznimi cevmi v splošnih uporabah.
General Information
Relations
Buy Standard
Standards Content (Sample)
SLOVENSKI STANDARD
SIST ISO 12151-2:2023
01-april-2023
Fluidna tehnika - Hidravlika - Spoji za fluidno tehniko in za splošno uporabo -
Cevne armature - 2. del: Cevne armature s konusom 24° po ISO 8434-1 in s
tesnilkami O
Connections for hydraulic fluid power and general use - Hose fittings - Part 2: Hose
fittings with ISO 8434-1 24° cone connector ends with O-rings
Raccordements pour transmissions hydrauliques et applications générales — Flexibles
de raccordement — Partie 2: Flexibles avec embouts à cône à 24 degrés et joints
toriques conformes à l'ISO 8434-1
Ta slovenski standard je istoveten z: ISO 12151-2:2022
ICS:
23.100.40 Cevna napeljava in sklopke Piping and couplings
SIST ISO 12151-2:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST ISO 12151-2:2023
---------------------- Page: 2 ----------------------
SIST ISO 12151-2:2023
INTERNATIONAL ISO
STANDARD 12151-2
Second edition
2022-10
Connections for hydraulic fluid power
and general use — Hose fittings —
Part 2:
Hose fittings with ISO 8434-1 24° cone
connector ends with O-rings
Raccordements pour transmissions hydrauliques et applications
générales — Flexibles de raccordement —
Partie 2: Flexibles avec embouts à cône à 24 degrés et joints toriques
conformes à l'ISO 8434-1
Reference number
ISO 12151-2:2022(E)
© ISO 2022
---------------------- Page: 3 ----------------------
SIST ISO 12151-2:2023
ISO 12151-2:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
© ISO 2022 – All rights reserved
---------------------- Page: 4 ----------------------
SIST ISO 12151-2:2023
ISO 12151-2:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Performance requirements . .2
5 Designation of hose fittings .2
6 Design . 3
7 Manufacture . 3
7.1 Construction . 3
7.2 Workmanship . 4
7.3 Finish . 4
7.4 Fitting protection . 4
8 Assembly instructions . 4
9 Procurement information .4
10 Marking . . 5
11 Identification statement . 5
Bibliography .13
iii
© ISO 2022 – All rights reserved
---------------------- Page: 5 ----------------------
SIST ISO 12151-2:2023
ISO 12151-2:2022(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 of the voluntary nature of standards, 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
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee
SC 4, Connectors and similar products and components.
This second edition cancels and replaces the first edition (ISO 12151-2:2003), which has been technically
revised.
The main changes are as follows:
— all references to ISO 8434-4 have been removed as this International Standard has been withdrawn
and replaced by ISO 8434-1;
— all references to ISO 8434-5 have been removed as this International Standard has been withdrawn
and replaced by ISO 19879.
A list of all parts in the ISO 12151 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
© ISO 2022 – All rights reserved
---------------------- Page: 6 ----------------------
SIST ISO 12151-2:2023
ISO 12151-2:2022(E)
Introduction
In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure
within an enclosed circuit. In general applications, a fluid can be conveyed under pressure.
Components are connected through their ports by stud ends on fluid conductor fittings to tubes/pipes
or to hose fittings and hoses.
v
© ISO 2022 – All rights reserved
---------------------- Page: 7 ----------------------
SIST ISO 12151-2:2023
---------------------- Page: 8 ----------------------
SIST ISO 12151-2:2023
INTERNATIONAL STANDARD ISO 12151-2:2022(E)
Connections for hydraulic fluid power and general use —
Hose fittings —
Part 2:
Hose fittings with ISO 8434-1 24° cone connector ends with
O-rings
1 Scope
This document specifies the general and dimensional requirements for the design and performance of
hose fittings with 24° cone connector ends with O-rings according to ISO 8434-1. These hose fittings
are made of carbon steel and are intended for use with hoses with nominal inside diameters from 5 mm
through 38 mm (inclusive).
NOTE For hose fittings used in hydraulic and pneumatic braking systems on road vehicles, see ISO 4038,
ISO 4039-1 and ISO 4039-2.
These hose fittings are for use in hydraulic fluid power systems with hoses that meet the requirements
of respective hose standards and in general applications with suitable hoses.
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 1302, Geometrical Product Specifications (GPS) — Indication of surface texture in technical product
documentation
ISO 4759-1:2000, Tolerances for fasteners — Part 1: Bolts, screws, studs and nuts — Product grades A, B
and C
ISO 5598, Fluid power systems and components — Vocabulary
ISO 8434-1, Metallic tube connections for fluid power and general use — Part 1: 24° cone connectors
ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5598 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
1
© ISO 2022 – All rights reserved
---------------------- Page: 9 ----------------------
SIST ISO 12151-2:2023
ISO 12151-2:2022(E)
4 Performance requirements
4.1 Hose assemblies shall meet the performance requirements specified in the appropriate
hose specification without leakage or failure. Examples for related ISO standards are listed in the
Bibliography.
4.2 The working pressure of the hose assembly shall be the lower of the pressures given for its size in
ISO 8434-1 and in the relevant hose specification.
4.3 The hose-fitting connection end shall meet the performance requirements specified in ISO 8434-1.
5 Designation of hose fittings
5.1 Hose fittings shall be designated by an alphanumeric code to facilitate ordering. They shall be
designated by "ISO 12151-2", followed by a spaced hyphen, then the connection end type, shape and
style letter symbols (see 5.4), followed by another spaced hyphen and, for the ends, the letter symbol
for the series directly followed by the 24° cone end size (nominal connection size) and the hose size
(nominal hose inside diameter), each separated by a multiplication sign (×).
EXAMPLE A swivel straight light-duty series hose fitting for use with 22 mm OD tubing and 19 mm ID hose is
designated as follows:
ISO 12151-2 - SWS - L22 × 19
5.2 The letter symbol designation of the hose fitting shall consist of the connection end type,
immediately followed by the shape of the fitting and the nut style, where applicable.
5.3 Tube ends are assumed to be rigid and thus do not need to be included in the code. However, if
another end is involved, it shall be designated.
5.4 The following letter symbols shall be used:
Connection end type Shape
Swivel / SW Straight / S
90° elbow / E
45° elbow / E45
Series Symbol
Light-duty L
Heavy-duty S
2
© ISO 2022 – All rights reserved
---------------------- Page: 10 ----------------------
SIST ISO 12151-2:2023
ISO 12151-2:2022(E)
6 Design
6.1 Figure 1 shows a typical connection with a hose fitting connector in accordance with this
document.
Key
1 hose fitting 4 adapter
2 O-ring seal 5 nut
3 port
Figure 1 — Example of typical ISO 12151-2 hose fitting connection
6.2 Hose fitting dimensions shown in Figures 2 to 5 shall conform to the dimensions in Tables 1 to 4
and to the relevant dimensions in ISO 8434-1.
6.3 Hex tolerances across flats shall be in accordance with ISO 4759-1:2000, product grade C.
Minimum across corner hex dimensions are 1,092 times the nominal width across flats. The minimum
side flat is 0,43 times the nominal width across flats.
6.4 Angular tolerances on axes of ends of elbows shall be ±3° for all sizes.
6.5 Details of contour shall be as chosen by the manufacturer, provided that the dimensions given in
Tables 1 to 4 are maintained.
7 Manufacture
7.1 Construction
Hose fittings may be made by forging or cold forming, machined from bar stock or manufactured
from multiple components. Materials other than carbon steel may be supplied as agreed between the
manufacturer and user.
3
© ISO 2022 – All rights reserved
---------------------- Page: 11 ----------------------
SIST ISO 12151-2:2023
...
INTERNATIONAL ISO
STANDARD 12151-2
Second edition
2022-10
Connections for hydraulic fluid power
and general use — Hose fittings —
Part 2:
Hose fittings with ISO 8434-1 24° cone
connector ends with O-rings
Raccordements pour transmissions hydrauliques et applications
générales — Flexibles de raccordement —
Partie 2: Flexibles avec embouts à cône à 24 degrés et joints toriques
conformes à l'ISO 8434-1
Reference number
ISO 12151-2:2022(E)
© ISO 2022
---------------------- Page: 1 ----------------------
ISO 12151-2:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
© ISO 2022 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 12151-2:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Performance requirements . .2
5 Designation of hose fittings .2
6 Design . 3
7 Manufacture . 3
7.1 Construction . 3
7.2 Workmanship . 4
7.3 Finish . 4
7.4 Fitting protection . 4
8 Assembly instructions . 4
9 Procurement information .4
10 Marking . . 5
11 Identification statement . 5
Bibliography .13
iii
© ISO 2022 – All rights reserved
---------------------- Page: 3 ----------------------
ISO 12151-2:2022(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 of the voluntary nature of standards, 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
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee
SC 4, Connectors and similar products and components.
This second edition cancels and replaces the first edition (ISO 12151-2:2003), which has been technically
revised.
The main changes are as follows:
— all references to ISO 8434-4 have been removed as this International Standard has been withdrawn
and replaced by ISO 8434-1;
— all references to ISO 8434-5 have been removed as this International Standard has been withdrawn
and replaced by ISO 19879.
A list of all parts in the ISO 12151 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
© ISO 2022 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 12151-2:2022(E)
Introduction
In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure
within an enclosed circuit. In general applications, a fluid can be conveyed under pressure.
Components are connected through their ports by stud ends on fluid conductor fittings to tubes/pipes
or to hose fittings and hoses.
v
© ISO 2022 – All rights reserved
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 12151-2:2022(E)
Connections for hydraulic fluid power and general use —
Hose fittings —
Part 2:
Hose fittings with ISO 8434-1 24° cone connector ends with
O-rings
1 Scope
This document specifies the general and dimensional requirements for the design and performance of
hose fittings with 24° cone connector ends with O-rings according to ISO 8434-1. These hose fittings
are made of carbon steel and are intended for use with hoses with nominal inside diameters from 5 mm
through 38 mm (inclusive).
NOTE For hose fittings used in hydraulic and pneumatic braking systems on road vehicles, see ISO 4038,
ISO 4039-1 and ISO 4039-2.
These hose fittings are for use in hydraulic fluid power systems with hoses that meet the requirements
of respective hose standards and in general applications with suitable hoses.
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 1302, Geometrical Product Specifications (GPS) — Indication of surface texture in technical product
documentation
ISO 4759-1:2000, Tolerances for fasteners — Part 1: Bolts, screws, studs and nuts — Product grades A, B
and C
ISO 5598, Fluid power systems and components — Vocabulary
ISO 8434-1, Metallic tube connections for fluid power and general use — Part 1: 24° cone connectors
ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5598 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
1
© ISO 2022 – All rights reserved
---------------------- Page: 6 ----------------------
ISO 12151-2:2022(E)
4 Performance requirements
4.1 Hose assemblies shall meet the performance requirements specified in the appropriate
hose specification without leakage or failure. Examples for related ISO standards are listed in the
Bibliography.
4.2 The working pressure of the hose assembly shall be the lower of the pressures given for its size in
ISO 8434-1 and in the relevant hose specification.
4.3 The hose-fitting connection end shall meet the performance requirements specified in ISO 8434-1.
5 Designation of hose fittings
5.1 Hose fittings shall be designated by an alphanumeric code to facilitate ordering. They shall be
designated by "ISO 12151-2", followed by a spaced hyphen, then the connection end type, shape and
style letter symbols (see 5.4), followed by another spaced hyphen and, for the ends, the letter symbol
for the series directly followed by the 24° cone end size (nominal connection size) and the hose size
(nominal hose inside diameter), each separated by a multiplication sign (×).
EXAMPLE A swivel straight light-duty series hose fitting for use with 22 mm OD tubing and 19 mm ID hose is
designated as follows:
ISO 12151-2 - SWS - L22 × 19
5.2 The letter symbol designation of the hose fitting shall consist of the connection end type,
immediately followed by the shape of the fitting and the nut style, where applicable.
5.3 Tube ends are assumed to be rigid and thus do not need to be included in the code. However, if
another end is involved, it shall be designated.
5.4 The following letter symbols shall be used:
Connection end type Shape
Swivel / SW Straight / S
90° elbow / E
45° elbow / E45
Series Symbol
Light-duty L
Heavy-duty S
2
© ISO 2022 – All rights reserved
---------------------- Page: 7 ----------------------
ISO 12151-2:2022(E)
6 Design
6.1 Figure 1 shows a typical connection with a hose fitting connector in accordance with this
document.
Key
1 hose fitting 4 adapter
2 O-ring seal 5 nut
3 port
Figure 1 — Example of typical ISO 12151-2 hose fitting connection
6.2 Hose fitting dimensions shown in Figures 2 to 5 shall conform to the dimensions in Tables 1 to 4
and to the relevant dimensions in ISO 8434-1.
6.3 Hex tolerances across flats shall be in accordance with ISO 4759-1:2000, product grade C.
Minimum across corner hex dimensions are 1,092 times the nominal width across flats. The minimum
side flat is 0,43 times the nominal width across flats.
6.4 Angular tolerances on axes of ends of elbows shall be ±3° for all sizes.
6.5 Details of contour shall be as chosen by the manufacturer, provided that the dimensions given in
Tables 1 to 4 are maintained.
7 Manufacture
7.1 Construction
Hose fittings may be made by forging or cold forming, machined from bar stock or manufactured
from multiple components. Materials other than carbon steel may be supplied as agreed between the
manufacturer and user.
3
© ISO 2022 – All rights reserved
---------------------- Page: 8 ----------------------
ISO 12151-2:2022(E)
7.2 Workmanship
Workmanship shall conform to the best commercial practice to produce high quality hose fittings.
Hose fittings shall be free from visual contaminants, all hanging burrs, loose scale and slivers that can
be dislodged in use, and any other defects that can affect the functioning of the parts. All machined
surfaces shall have a surface roughness value of ISO 1302-MRR Ramax 6,3 µm, except where otherwise
specified.
7.3 Finish
The external surface and threads of all carbon steel parts should be plated or coated with a suitable
material that passes a 72-h neutral
...
NORME ISO
INTERNATIONALE 12151-2
Deuxième édition
2022-10
Raccordements pour transmissions
hydrauliques et applications
générales — Flexibles de
raccordement —
Partie 2:
Flexibles avec embouts à cône à 24
degrés et joints toriques conformes à
l'ISO 8434-1
Connections for hydraulic fluid power and general use — Hose
fittings —
Part 2: Hose fittings with ISO 8434-1 24° cone connector ends with
O-rings
Numéro de référence
ISO 12151-2:2022(F)
© ISO 2022
---------------------- Page: 1 ----------------------
ISO 12151-2:2022(F)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2022
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
ii
© ISO 2022 – Tous droits réservés
---------------------- Page: 2 ----------------------
ISO 12151-2:2022(F)
Sommaire Page
Avant-propos .iv
Introduction .v
1 Domaine d’application . 1
2 Références normatives .1
3 Termes et définitions . 1
4 Exigences relatives aux performances . 2
5 Désignation des flexibles de raccordement . 2
6 Conception .3
7 Fabrication . 3
7.1 Construction . 3
7.2 Qualité d'exécution . 4
7.3 Finition . 4
7.4 Protection des embouts . 4
8 Instructions de montage .4
9 Informations à fournir à l'achat . 5
10 Marquage . 5
11 Phrase d'identification . 5
Bibliographie .13
iii
© ISO 2022 – Tous droits réservés
---------------------- Page: 3 ----------------------
ISO 12151-2:2022(F)
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes
nationaux de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est
en général confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l'ISO participent également aux travaux.
L'ISO collabore étroitement avec la Commission électrotechnique internationale (CEI) en ce qui
concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document a
été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir
www.iso.org/directives).
L'attention est attirée sur le fait que certains des éléments du présent document peuvent faire l'objet de
droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable
de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant
les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de
l'élaboration du document sont indiqués dans l'Introduction et/ou dans la liste des déclarations de
brevets reçues par l'ISO (voir www.iso.org/brevets).
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un
engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion
de l'ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles
techniques au commerce (OTC), voir www.iso.org/avant-propos.
Le présent document a été élaborée par le comité technique ISO/TC 131, Transmissions hydrauliques et
pneumatiques, sous-comité SC 4, Raccords, produits similaires et leurs composants.
Cette deuxième édition annule et remplace la première édition (ISO 12151-2:2003) qui a fait l’objet
d’une révision technique.
Les principales modifications sont les suivantes:
— suppression de toutes les références à l'ISO 8434-4 qui a été annulée et remplacée par l'ISO 8434-1;
— suppression de toutes les références à l'ISO 8434-5 qui a été annulée et remplacée par l’ISO 19879.
Une liste de toutes les parties de la série ISO 12151 se trouve sur le site web de l’ISO.
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes
se trouve à l’adresse www.iso.org/fr/members.html.
iv
© ISO 2022 – Tous droits réservés
---------------------- Page: 4 ----------------------
ISO 12151-2:2022(F)
Introduction
Dans les systèmes de transmissions hydrauliques, l'énergie est transmise et commandée par
l'intermédiaire d'un fluide sous pression circulant en circuit fermé. Dans les applications générales, le
fluide peut être véhiculé sous pression.
Les composants sont raccordés par leurs orifices au moyen d'éléments mâles fixés sur les embouts des
tubes/tuyauteries rigides ou sur les flexibles de raccordement.
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NORME INTERNATIONALE ISO 12151-2:2022(F)
Raccordements pour transmissions hydrauliques et
applications générales — Flexibles de raccordement —
Partie 2:
Flexibles avec embouts à cône à 24 degrés et joints
toriques conformes à l'ISO 8434-1
1 Domaine d’application
Le présent document spécifie les exigences générales et dimensionnelles pour la conception et les
performances des flexibles de raccordement avec embouts à cône à 24° et joints toriques conformes à
l’ISO 8434-1. Ces flexibles de raccordement sont réalisés en acier au carbone et sont prévus pour être
utilisés avec des tuyaux dont le diamètre intérieur nominal est compris entre 5 mm et 38 mm inclus.
NOTE Pour les flexibles de raccordement utilisés dans les systèmes de freinage hydrauliques et pneumatiques
sur les véhicules routiers, voir l'ISO 4038, l’ISO 4039-1 et l'ISO 4039-2.
Ces flexibles de raccordement sont utilisés dans les systèmes de transmissions hydrauliques avec des
tuyaux flexibles qui répondent aux exigences des normes de tuyaux respectives et dans des applications
générales avec des tuyaux adaptés.
2 Références normatives
Les documents suivants sont cités dans le texte de sorte qu’ils constituent, pour tout ou partie de leur
contenu, des exigences du présent document. Pour les références datées, seule l’édition citée s’applique.
Pour les références non datées, la dernière édition du document de référence s'applique (y compris les
éventuels amendements).
ISO 1302, Spécification géométrique des produits (GPS) — Indication des états de surface dans la
documentation technique de produits
ISO 4759-1:2000, Tolérances des éléments de fixation — Partie 1: Vis, goujons et écrous — Grades A, B et C
ISO 5598, Transmissions hydrauliques et pneumatiques — Vocabulaire
ISO 8434-1, Raccordements de tubes métalliques pour transmissions hydrauliques et pneumatiques et
applications générales — Partie 1: Raccords coniques à 24°
ISO 9227, Essais de corrosion en atmosphères artificielles — Essais aux brouillards salins
3 Termes et définitions
Pour les besoins du présent document, les termes et définitions donnés dans l’ISO 5598 s'appliquent.
L'ISO et l'IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en
normalisation, consultables aux adresses suivantes:
— ISO Online browsing platform: disponible à l'adresse https:// www .iso .org/ obp
— IEC Electropedia: disponible à l'adresse https:// www .electropedia .org/
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ISO 12151-2:2022(F)
4 Exigences relatives aux performances
4.1 Les flexibles de raccordement doivent satisfaire aux exigences de performances spécifiées dans la
spécification appropriée pour les tuyaux flexibles sans présenter de fuite ou de rupture. Des exemples
de normes ISO correspondantes figurent dans la Bibliographie.
4.2 La pression d'utilisation du flexible de raccordement doit être la plus basse des pressions données
pour sa dimension dans l'ISO 8434-1 et dans toute spécification appropriée pour les tuyaux.
4.3 Les extrémités des flexibles de raccordement doivent répondre aux exigences de performance
spécifiées dans l'ISO 8434-1.
5 Désignation des flexibles de raccordement
5.1 Les flexibles de raccordement doivent être désignés par un code alphanumérique pour faciliter
la commande. Ils doivent être désignés par “ISO 12151-2”, suivi d'un tiret espacé, ensuite des symboles
du type d’extrémité de raccordement et de sa forme (voir 5.4), suivi d’un autre tiret espacé et, pour les
extrémités, du symbole de la série directement suivi de la dimension de l'embout à cône à 24° (dimension
nominale du raccordement) et de la dimension du tuyau flexible (diamètre intérieur nominal), chacune
des dimensions étant séparée par un signe de multiplication (×).
EXEMPLE Un flexible de raccordement droit pivotant de série légère pour utilisation avec un tube de
diamètre extérieur de 22 mm et un tuyau flexible de diamètre intérieur de 19 mm est désigné comme suit:
ISO 12151-2 - SWS - L22 × 19
5.2 La désignation par le symbole du flexible de raccordement doit comporter le type de l'extrémité
de raccordement, immédiatement suivi de la forme de l'embout, et le type de l'écrou, le cas échéant.
5.3 Les extrémités des tubes sont implicites, il n'est donc pas nécessaire de les inclure dans le code.
Par contre, si un autre type d'extrémité est prévu, il doit être désigné.
5.4 Les symboles suivants doivent être utilisés:
Type d'extrémité
Forme
de raccordement
Pivotant / SW Droit / S
Coude à 90° / E
Coude à 45° / E45
Série Symbole
Série légère L
Série lourde S
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ISO 12151-2:2022(F)
6 Conception
6.1 La Figure 1 présente un raccordement typique avec un flexible de raccordement conforme au
présent document.
Légende
1 flexible de raccordement 4 adaptateur
2 joint torique 5 écrou
3 orifice
Figure 1 — Exemple de flexible de raccordement typique ISO 12151-2
6.2 Les dimensions des flexibles de raccordement représentés aux Figures 2 à 5 doivent être
conformes aux dimensions des Tableaux 1 à 4 et aux dimensions appropriées de l'ISO 8434-1.
6.3 Les tolérances des surplats des éléments hexagonaux doivent être conformes à l'ISO 4759-1:2000,
grade C. Les cotes surangles minimales sont de 1,092 fois les cotes nominales des surplats. La largeur
minimale d'un plat est de 0,43 fois la cote nominale des surplats.
6.4 Les tolérances angulaires sur les axes des extrémités des coudes doivent être de ±3° pour toutes
les dimensions.
6.5 Les détails du contour doivent être laissés au choix du fabricant, à condition que les dimensions
données dans les Tableaux 1 à 4 soient respectées.
7 Fabrication
7.1 Construction
Les embouts peuvent être forgés ou façonnés à froid, usinés à partir d'acier laminé ou fabriqués à partir
d'éléments multiples. Des matériaux autres que les aciers au carbone peuvent être utilisés par accord
entre le fabricant et l'utilisateur.
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ISO 12151-2:2022(F)
7.2 Qualité d'exécution
La qualité d'exécution doit être conforme aux meilleures pratiques commerciales pour donner des
flexibles de raccordement de haute qualité. Les flexibles de raccordement doivent être exempts de tout
contaminant visuel, de toute bavure, d'écaille et d'éclat qui peuvent être délogés lors de l'utilis
...
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