ISO 12151-6:2009

Connections for hydraulic fluid power and general use - Hose fittings - Part 6: Hose fittings with ISO 8434-6 60 degree cone ends

ISO 12151-6:2009 specifies the general and dimensional requirements for the design and performance of hose fittings made of carbon steel with 60° cone ends for hose sizes 5 to 51 inclusive, in accordance with ISO 4397. These hose fittings are for use in hydraulic fluid power systems with hose that meets the requirements of the respective hose standards and in general applications with suitable hose.

Raccordements pour transmissions hydrauliques et applications générales — Flexibles de raccordement — Partie 6: Flexibles avec embouts à cône à 60 degrés conformes à l'ISO 8434-6

L'ISO 12151-6:2009 spécifie les exigences générales et dimensionnelles pour la conception et les performances des flexibles de raccordement fabriqués en acier au carbone avec embouts à cône à 60° pour des tailles de flexibles comprises entre 5 et 51 inclus, conformément à l'ISO 4397. Ces flexibles de raccordement sont utilisés dans les systèmes de transmissions hydrauliques avec des tuyaux qui répondent aux exigences des normes de tuyaux respectives, et dans des applications générales lorsqu'il s'agit de tuyaux adaptés.

General Information

• Status: Published
• Publication Date: 08-Jul-2009
• ICS: 23.040.70 - Hoses and hose assemblies
• ICS: 23.100.40 - Piping and couplings
• Technical Committee: ISO/TC 131/SC 4 - Connectors and similar products and components
• Drafting Committee: ISO/TC 131/SC 4 - Connectors and similar products and components
• Current Stage: 9093 - International Standard confirmed
• Start Date: 07-Sep-2021
• Completion Date: 13-Dec-2025

Overview

ISO 12151-6:2009 specifies the general and dimensional requirements for hose fittings made of carbon steel with 60° cone ends (to mate with ISO 8434-6 connectors) for hose sizes 5 to 51 (per ISO 4397). Intended for hydraulic fluid power systems and general-pressure hose applications, the standard covers design, performance verification, manufacture, assembly instructions, marking and procurement information for hose fittings.

Key topics and technical requirements

• Scope and materials: Carbon steel hose fittings with 60° cone ends for nominated hose sizes; other materials permitted only by agreement between manufacturer and user.
• Interface and compatibility: Cone ends and mating tube/tubing interfaces conform to ISO 8434-6; hose size references follow ISO 4397.
• Performance testing: Hose assemblies must meet hose specification performance and pass pressure and cyclic endurance testing (hose tests per ISO 6605; fitting verification per ISO 19879). Rated working pressure is the lower of the connector (ISO 8434-6) and the hose specification.
• Design and dimensions: Detailed dimensional tables, typical fitting illustrations (straight, swivel, 45°/90° elbows), hex tolerances (ISO 4759-1 grade C) and angular tolerances are specified. Threads on connection ends are inch screw threads per ISO 228-1.
• Sealing styles: Letter-coded sealing styles (e.g., A = O-ring, B = non O-ring) and alphanumeric designation format (Hose fitting ISO 12151-6 - [code] - OD × ID) to standardize ordering and identification.
• Manufacture & workmanship: Acceptable manufacturing methods (forging, cold-forming, machining) and surface finish requirements (machined surfaces Ra max 6.3 µm).
• Corrosion protection: Carbon steel parts must be plated/coated to pass a 72 h salt spray test (ISO 9227); cadmium plating is prohibited.
• Assembly & marking: Manufacturers must supply assembly instructions (torques/wrench turns, tooling) and fittings must be permanently marked with manufacturer identification.

Practical applications

• Use in hydraulic fluid power systems (mobile and industrial hydraulics) where hoses with 60° cone end fittings are required.
• General-pressure hose systems in construction, agricultural equipment, material handling, and industrial machinery.
• Standardizes interchangeability and procurement for OEMs, hose-assembly manufacturers, distributors and maintenance shops.

Who should use this standard

• Design engineers and system integrators specifying hydraulic connections
• Hose and fitting manufacturers and quality engineers for design and testing
• Procurement specialists and spec writers creating purchase orders and product catalogs
• Test laboratories verifying pressure, cyclic and corrosion performance

Related standards

• ISO 8434-6 (60° cone connectors)
• ISO 4397 (hose sizes)
• ISO 6605 (hose assembly tests)
• ISO 19879 (test methods for hydraulic connections)
• ISO 9227 (salt spray corrosion test)
• ISO 228-1 (pipe threads)
• ISO 4759-1 (tolerances for fasteners)

Keywords: ISO 12151-6, hose fittings, 60° cone ends, ISO 8434-6, hydraulic fluid power, carbon steel fittings, hose assemblies, ISO 4397.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 12151-6
First edition
2009-07-15
Connections for hydraulic fluid power
and general use — Hose fittings —
Part 6:
Hose fittings with ISO 8434-6 60° cone
ends
Raccordements pour transmissions hydrauliques et applications
générales — Flexibles de raccordement —
Partie 6: Flexibles avec embouts à cône à 60° conformes
à l'ISO 8434-6
Reference number
©
ISO 2009
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.

©  ISO 2009
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
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Tel. + 41 22 749 01 11
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Published in Switzerland
ii © ISO 2009 – All rights reserved

Contents Page
Foreword. iv
Introduction . v
1 Scope .1
2 Normative references .1
3 Terms and definitions .2
4 Performance requirements .2
5 Designation of hose fittings .2
6 Design .3
7 Manufacture.3
8 Assembly instructions .4
9 Procurement information.5
10 Marking .5
11 Identification statement (reference to this part of ISO 12151) .5
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.
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 12151-6 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 4,
Connectors and similar products and components.
ISO 12151 consists of the following parts, under the general title Connections for hydraulic fluid power and
general use — Hose fittings:
⎯ Part 1: Hose fittings with ISO 8434-3 O-ring face seal ends
⎯ Part 2: Hose fittings with ISO 8434-1 and ISO 8434-4 24° cone connector ends with O-rings
⎯ Part 3: Hose fittings with ISO 6162-1 or ISO 6162-2 flange ends
⎯ Part 4: Hose fittings with ISO 6149 metric stud ends
⎯ Part 5: Hose fittings with ISO 8434-2 37° flared ends
⎯ Part 6: Hose fittings with ISO 8434-6 60° cone ends
iv © ISO 2009 – All rights reserved

Introduction
In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an
enclosed circuit. In general applications, the fluid may be conveyed under pressure.
Components are connected through their ports by stud ends on fluid conductor connectors to tubes or pipes
or to hose fittings and hoses.
ISO/TC 131/SC 4 recommends that hose fittings that conform to ISO 12151-1 and ISO 12151-2 be used
because these International Standards represent the state of the art. However, this part of ISO 12151 has
been developed because it specifies hose fittings that are currently used worldwide.
INTERNATIONAL STANDARD ISO 12151-6:2009(E)

Connections for hydraulic fluid power and general use — Hose
fittings —
Part 6:
Hose fittings with ISO 8434-6 60° cone ends
1 Scope
This part of ISO 12151 specifies the general and dimensional requirements for the design and performance of
hose fittings made of carbon steel with 60° cone ends for hose sizes 5 to 51 inclusive, in accordance with
ISO 4397.
These hose fittings (see Figure 1 for a typical example) are for use in hydraulic fluid power systems with
hoses that meet the requirements of the respective hose standards and in general applications with suitable
hoses.
NOTE 1 Other materials can be supplied as agreed between the manufacturer and user.
NOTE 2 For hose fittings used in hydraulic and pneumatic braking systems on road vehicles (as defined in the scope of
ISO/TC 22), see ISO 4038, ISO 4039-1 and ISO 4039-2.
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 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions,
tolerances and designation
ISO 4397, Fluid power systems and components — Connectors and associated components — Nominal
1)
outside diameters of tubes and nominal sizes of hoses
ISO 4759-1, 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 6605, Hydraulic fluid power — Hoses and hose assemblies — Test methods
ISO 8434-6, Metallic tube connections for fluid power and general use — Part 6: 60° cone connectors with or
2)
without O-ring
ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests
ISO 19879, Metallic tube connections for fluid power and general use — Test methods for hydraulic fluid
power connections
1) Under development. (Revision of ISO 4397:1993)
2) To be published.
3 Terms and definitions
For the purposes of this part of ISO 12151, the terms and definitions given in ISO 5598 shall apply.
4 Performance requirements
Hose assemblies shall meet the performance requirements specified in the appropriate hose specification
without leakage or failure when tested in accordance with ISO 6605.
The rated (working) pressure of the hose assembly shall be the lower of the rated pressure given for its size in
ISO 8434-6 and the working pressure in the relevant hose specification.
The rated pressure of the hose fitting shall be verified through testing conducted in accordance with
ISO 19879, but the entire hose assembly shall be tested in accordance with ISO 6605. During the cyclic
endurance test, the hose assembly shall be subjected to the number of cycles specified in the relevant hose
specification.
5 Designation of hose fittings
5.1 Hose fittings shall be designated by an alphanumeric code to facilitate ordering. They shall be
designated by the phrase “Hose fitting,” followed by “ISO 12151-6”, followed by a spaced hyphen, then the
connection end type, shape and sealing style letter symbols (see 5.4), followed by another spaced hyphen,
the 60° cone connector end size (nominal tube outside diameter in accordance with ISO 8434-6) and the
hose size (nominal hose inside diameter in accordance with ISO 4397), each separated by a multiplication
symbol (×).
EXAMPLE A swivel hose fitting O-ring sealing with 45° elbow, for 12 mm nominal OD tubing and 12,5 mm nominal
ID hose, is designated as follows:
Hose fitting ISO 12151-6 - SWE45A - 12 × 12,5
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 male 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 Letter
Swivel SW
Shape Letter
Straight S
E
90° elbow
E45
45° elbow
Sealing Style
O-ring A
Non O-ring B
2 © ISO 2009 – All rights reserved

6 Design
6.1 Figure 1 shows a typical example of a hose fitting with a 60° cone connection end.

Key
1 hose fitting
2 O-ring seal
3 nut
4 straight stud connector conforming to ISO 8434-6
5 port conforming to ISO 6149-1
Figure 1 — Typical example of hose fitting with 60° cone connection
6.2 Hose fitting dimensions shown in Figures 2 through 5 shall conform to the dimensions in Tables 1
through 4 and to the relevant dimensions in ISO 8434-6.
6.3 Hex tolerances across flats shall be in accordance with ISO 4759-1, product grade C. Minimum across-
corner hex diameters 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 through 4 are maintained.
6.6 The screw threads on the connection ends of the hose fittings shall be inch screw threads in
accordance with ISO 228-1.
7 Manufacture
7.1 Construction
Hose fittings may be forged, cold-formed, machined from barstock or manufactured from multiple
components.
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 which can be dislodged in
use and any other defects that might affect the function of the parts. All machined surfaces shall have a
surface roughness value of Ra max 6,3 µm, except where otherwise sp
...

DRAFT INTERNATIONAL STANDARD ISO/DIS 12151-6
ISO/TC 131/SC 4 Secretariat: ANSI
Voting begins on: Voting terminates on:
2007-01-23 2007-06-23
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION
Connections for hydraulic fluid power and general use — Hose
fittings —
Part 6:
Hose fittings with ISO 8434-6 60° cone ends
Raccordements pour transmissions hydrauliques et applications générales — Flexibles de raccordement —
Partie 6: Flexibles avec embouts à cône à 60° confor mes à l'ISO 8434-6
ICS 23.040.70; 23.100.40
To expedite distribution, this document is circulated as received from the committee secretariat.
ISO Central Secretariat work of editing and text composition will be undertaken at publication
stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.
THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.
© International Organization for Standardization, 2007

ISO/DIS 12151-6
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This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall
not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the
unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted
under the applicable laws of the user's country, neither this ISO draft nor any extract from it may be
reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, photocopying,
recording or otherwise, without prior written permission being secured.
Requests for permission to reproduce should be addressed to either ISO at the address below or ISO's
member body in the country of the requester.
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Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
©
ii ISO 2007 – All rights reserved

ISO/DIS 12151-6
Contents
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.4
7.1 Construction.4
7.2 Workmanship.4
7.3 Finish.4
7.4 Protection.4
8 Assembly instructions.4
9 Procurement information.5
10 Marking.5
11 Identification statement (reference to this part of ISO 12151) .5
Bibliography.13

DRAFT 2007
ISO/DIS 12151-6
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.
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.
International Standard ISO 12151-6 was prepared by Technical Committee ISO/TC 131, Fluid power systems,
Subcommittee SC 4, Connectors and similar products and components.
ISO 12151 consists of the following parts, under the general title Connections for hydraulic fluid power and general
use — Hose fittings:
⎯ Part 1: Hose fittings with ISO 8434-3 O-ring face seal ends
⎯ Part 2: Hose fittings with ISO 8434-1 and ISO 8434-4 24° cone connector end with O-rings
⎯ Part 3: Hose fittings with ISO 6162 flange ends
⎯ Part 4: Hose fittings with ISO 6149 metric stud ends
⎯ Part 5: Hose fittings with ISO 8434-2 37° flared ends
⎯ Part 6: Hose fittings with ISO 8434-6 60° cone ends
iv © ISO 2006 – All rights reserved

DRAFT 2007
ISO/DIS 12151-6
Introduction
In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an
enclosed circuit. In general applications, the fluid may be conveyed under pressure.
Components are connected through their ports by stud ends on fluid conductor connectors to tubes or pipes or to
hose fittings and hoses.
DRAFT 2007
DRAFT INTERNATIONAL STANDARD ISO/DIS 12151-6

Connections for hydraulic fluid power and general use — Hose
fittings —
Part 6:
Hose fittings with ISO 8434-6 60° cone ends
1 Scope
This part of ISO 12151 specifies the general and dimensional requirements for the design and performance of hose
fittings made of carbon steel with 60° cone ends for hose sizes 5 to 51 inclusive, in accordance with ISO 4397.
These hose fittings (see Figure 1 for a typical example) are for use in hydraulic fluid power systems with hose that
meets the requirements of the respective hose standards and in general applications with suitable hose.
NOTE 1 Other materials may be supplied as agreed between the manufacturer and user.
NOTE 2 For hose fittings used in hydraulic and pneumatic braking systems on road vehicles (as defined in the scope of
ISO/TC 22), see ISO 4038 and ISO 4039.
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 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions, tolerances
and designation
ISO 4397, Fluid power systems and components — Connectors and associated components — Nominal outside
diameters of tubes and nominal inside diameters of hoses
ISO 4759-1, Tolerances for fasteners — Part 1: Bolts, screws, studs and nuts — Product grades A, B and C
1)
ISO 5598 , Fluid power systems and components — Vocabulary
2)
ISO 8434-6 , Metallic tube connections for fluid power and general use — Part 6: 60° cone connectors with or
without O-ring
ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests
ISO 19879, Metallic tube connections for fluid power and general use — Test methods for hydraulic fluid power
connections
3 Terms and definitions
For the purposes of this part of ISO 12151, the terms and definitions given in ISO 5598 shall apply.

1)
Under revision
2)
To be published
DRAFT 2007
ISO/DIS 12151-6
4 Performance requirements
Hose assemblies shall meet the performance requirements specified in the appropriate hose specification without
leakage or failure when tested in accordance with ISO 6605.
The rated (working) pressure of the hose assembly shall be the lower of the rated pressure given for its size in
ISO 8434-6 and the working pressure in the relevant hose specification.
The working pressure of the hose fitting shall be verified through testing conducted in accordance with ISO 19879,
but the entire hose assembly shall be tested in accordance with ISO 6605. During the cyclic endurance test, the
hose fitting shall be subjected to the number of cycles specified in the relevant hose specification.
5 Designation of hose fittings
5.1 Hose fittings shall be designated by an alphanumeric code to facilitate ordering. They shall be designated by
the phrase “Hose fitting,” followed by ISO 12151-6, followed by a spaced hyphen, then the connection end type,
shape and sealing style letter symbols (see 5.4) followed by another spaced hyphen, the 60° cone connector end
size (nominal tube outside diameter in accordance with ISO 8434-6) and the hose size (nominal hose inside
diameter in accordance with ISO 4397), each separated by a multiplication symbol (×).
A swivel hose fitting O-ring sealing with 45° elbow, for 12 mm nominal OD tubing and 12,5 mm nominal ID hose is
designated as follows:
EXAMPLE
Hose fitting ISO 12151-6 - SWE45B - 12 × 12,5
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 male 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 Letter
Swivel SW
Shape Letter
Straight S
E
90° elbow
E45
45° elbow
Sealing Style
O-ring A
Non O-ring B
2 © ISO 2006 – All rights reserved

DRAFT 2007
ISO/DIS 12151-6
6 Design
6.1 Figure 1 shows a typical example of a hose fitting with a 60° cone connection end.

Key
1 Hose fitting
2 O-ring seal
3 Nut
4 Straight stud connector conforming to ISO 8434-6
5 Port conforming to ISO 6149-1
6 O-ring seal
Figure 1 — Typical example of hose fitting with 60° cone connection
6.2 Hose fitting dimensions shown in Figures 2 through 5 shall conform to the dimensions in Tables 1 through 4
and to the relevant dimensions in ISO 8434-6.
6.3 Hex tolerances across flats shall be in accordance with ISO 4759-1, product gra
...

NORME ISO
INTERNATIONALE 12151-6
Première édition
2009-07-15
Raccordements pour transmissions
hydrauliques et applications générales —
Flexibles de raccordement —
Partie 6:
Flexibles avec embouts à cône à 60°
conformes à l'ISO 8434-6
Connections for hydraulic fluid power and general use — Hose
fittings —
Part 6: Hose fittings with ISO 8434-6 60° cone ends

Numéro de référence
©
ISO 2009
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©  ISO 2009
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quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit
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Publié en Suisse
ii © ISO 2009 – Tous droits réservés

Sommaire Page
Avant-propos. iv
Introduction . v
1 Domaine d'application.1
2 Références normatives .1
3 Termes et définitions.2
4 Exigences de performance .2
5 Désignation des flexibles de raccordement .2
6 Conception .3
7 Fabrication.4
8 Instructions de montage .5
9 Informations à fournir à l’achat.5
10 Marquage.5
11 Phrase d’identification (Référence à la présente partie de l'ISO 12151) .5
Bibliographie .12

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 Normes internationales sont rédigées conformément aux règles données dans les Directives ISO/CEI,
Partie 2.
La tâche principale des comités techniques est d'élaborer les Normes internationales. Les projets de Normes
internationales adoptés par les comités techniques sont soumis aux comités membres pour vote. Leur
publication comme Normes internationales requiert l'approbation de 75 % au moins des comités membres
votants.
L'attention est appelée 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.
L'ISO 12151-6 a été élaborée par le comité technique ISO/TC 131, Transmissions hydrauliques et
pneumatiques, sous-comité SC 4, Raccords, produits similaires et leurs composants.
L'ISO 12151 comprend les parties suivantes, présentées sous le titre général Raccordements pour
transmissions hydrauliques et applications générales — Flexibles de raccordement:
⎯ Partie 1: Flexibles avec embouts à joints faciaux toriques conformes à l'ISO 8434-3
⎯ Partie 2: Flexibles avec embouts à cône à 24° et joints toriques conformes à l'ISO 8434-1 et à l'ISO 8434-4
⎯ Partie 3: Flexibles avec brides conformes à l'ISO 6162-1 ou à l'ISO 6162-2
⎯ Partie 4: Flexibles avec éléments mâles métriques conformes à l'ISO 6149
⎯ Partie 5: Flexibles avec embouts évasés à 37° conformes à l'ISO 8434-2
⎯ Partie 6: Flexibles avec embouts à cône à 60° conformes à l'ISO 8434-6
iv © ISO 2009 – Tous droits réservés

Introduction
Dans les systèmes de transmissions hydrauliques, l'énergie est transmise et commandée par l'intermédiaire
d'un liquide sous pression circulant en circuit fermé. Dans les applications générales, le fluide peut être
véhiculé sous pression.
Les composants sont raccordés par leurs orifices par des éléments mâles fixés sur les raccords de tubes et
de tuyauterie ou sur les flexibles de raccordement et les tuyaux.
L’ISO/TC 131/SC 4 recommande l’utilisation de flexibles de raccordement conformes à l’ISO 12151-1 et à
l’ISO 12151-2 car ces Normes internationales représentent l’état de l’art. Cependant, la présente partie de
l’ISO 12151 a été développée car elle spécifie des flexibles de raccordement qui sont actuellement utilisés
dans le monde entier.
NORME INTERNATIONALE ISO 12151-6:2009(F)

Raccordements pour transmissions hydrauliques et
applications générales — Flexibles de raccordement —
Partie 6:
Flexibles avec embouts à cône à 60° conformes à l'ISO 8434-6
1 Domaine d'application
La présente partie de l'ISO 12151 spécifie les exigences générales et dimensionnelles pour la conception et
les performances des flexibles de raccordement fabriqués en acier au carbone avec embouts à cône à 60°
pour des tailles de flexibles comprises entre 5 et 51 inclus, conformément à l’ISO 4397.
Ces flexibles de raccordement (voir Figure 1 pour un exemple type) sont utilisés dans les systèmes de
transmissions hydrauliques avec des tuyaux qui répondent aux exigences des normes de tuyaux respectives,
et dans des applications générales lorsqu'il s'agit de tuyaux adaptés.
NOTE 1 D’autres matériaux peuvent être utilisés après accord entre le fabricant et l’utilisateur.
NOTE 2 Pour les flexibles de raccordement utilisés dans les systèmes de freinage hydrauliques et pneumatiques sur
les véhicules routiers (comme défini dans le domaine d’application de l’ISO/TC 22), voir l’ISO 4038, l’ISO 4039-1 et
l’ISO 4039-2.
2 Références normatives
Les documents de référence suivants sont indispensables pour l'application 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 228-1, Filetages de tuyauterie pour raccordement sans étanchéité dans le filet — Partie 1: Dimensions,
tolérances et désignation
ISO 4397, Transmissions hydrauliques et pneumatiques — Raccords et éléments associés — Diamètres
1)
extérieurs nominaux des tubes et tailles nominaux des tuyaux flexibles
ISO 4759-1, Tolérances des éléments de fixation — Partie 1: Vis, goujons et écrous — Grades A, B et C
ISO 5598, Transmissions hydrauliques et pneumatiques — Vocabulaire
ISO 6605, Transmissions hydrauliques — Tuyaux et ensembles flexibles — Méthode d'essai
ISO 8434-6, Raccordements de tubes métalliques pour transmissions hydrauliques et pneumatiques et
2)
applications générales — Partie 6: Raccords coniques à 60° avec ou sans joint torique

1) En cours d’élaboration. (Révision de l’ISO 4397:1993)
2) À publier.
ISO 9227, Essais de corrosion en atmosphères artificielles — Essais aux brouillards salins
ISO 19879, Raccords de tubes métalliques pour transmissions hydrauliques et pneumatiques et applications
générales — Méthodes d'essai pour raccords pour transmissions hydrauliques
3 Termes et définitions
Pour les besoins de la présente partie de l’ISO 12151, les termes et définitions donnés dans l’ISO 5598
s'appliquent.
4 Exigences de performance
Les flexibles de raccordement assemblés doivent satisfaire aux exigences de performance fixées dans la
spécification pertinente pour les tuyaux, sans présenter de fuite ou rupture, lorsqu’ils sont soumis à essai
conformément à l’ISO 6605.
La pression nominale (de fonctionnement) des assemblages flexibles doit être la plus basse des pressions
nominales données pour sa taille dans l’ISO 8434-6 et la plus basse pression de fonctionnement indiquée
dans la spécification pertinente pour les tuyaux.
La pression nominale du flexible de raccordement doit être vérifiée par des essais effectués conformément à
l'ISO 19879, mais l’intégralité des assemblages flexibles doit faire l’objet d’essais conformément à l'ISO 6605.
Au cours de l’essai d’endurance cyclique, le flexible de raccordement doit subir le nombre de cycles spécifié
dans les spécifications appropriées des tuyaux.
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 la mention «Flexibles de raccordement», suivie de «ISO 12151-6»,
suivi d'un trait d'union, puis des symboles littéraux du type d’extrémité de raccordement, de la forme et du
type d’étanchéité (voir 5.4), suivi d'un autre trait d'union, puis de la dimension de l’embout à cône à
60° (diamètre extérieur nominal du tube conformément à l'ISO 8434-6) et de la taille du tuyau (diamètre
intérieur nominal conformément à l'ISO 4397), chacune des dimensions étant séparée par un signe de
multiplication (×).
EXEMPLE Un raccord de flexible pivotant à joint torique avec un coude à 45°, pour tube de diamètre extérieur
nominal 12 mm et tuyau flexible de diamètre intérieur nominal 12,5 mm, est désigné comme suit:
Raccord de flexible ISO 12151-6 - SWE45A - 12 × 12,5
5.2 La désignation du raccord de flexible par un symbole littéral doit comporter le type d’embout,
immédiatement suivi de la forme du raccord et du type d’écrou, le cas échéant.
5.3 Les extrémités mâles des tubes étant implicites, il n’est pas nécessaire de les inclure dans le code.
Cependant, si un autre type d’extrémité est prévu, il doit être désigné.
2 © ISO 2009 – Tous droits réservés

5.4 Les symboles littéraux suivants doivent être utilisés:
Type d’extrémité Code
de raccordement alphanumérique
Pivotant SW
Forme Code
alphanumérique
Droit S
E
Coude à 90°
Coude à 45° E45
Étanchéité Type
Joint torique A
Joint non torique B
6 Conception
6.1 La Figure 1 représente un exemple type de flexible de raccordement à embout à cône à 60°.

Légende
1 flexible de raccordement
2 joints toriques
3 écrou
4 raccord mâle droit conforme à l’ISO 8434-6
5 orifice conforme à l’ISO 6149-1
Figure 1 — Exemple type de flexible de raccordement à embout à cône à 60°
6.2 Les dimensions des flexibles de raccordement représentés aux Figures 2 à 5 doivent être conformes à
celles des Tableaux 1 à 4 et aux dimensions pertinentes de l'ISO 8434-6.
6.3 Les tolérances sur les cotes surplats des éléments hexagonaux doivent être conformes à l’ISO 4759-1,
classe de qualité C. Les diamètres surangles minimaux sont de 1,092 fois la largeur nominale des surplats. La
largeur minimale d’un plat est de 0,43 fois la largeur nominale des surplats.
6.4 La tolérance angulaire sur l'axe des extrémités des coudes doit être de ± 3° pour toutes les dimensions.
6.5 Les détails du contour doivent être laissés au choix du fabricant, dans la mesure où les dimensions
données aux Tableaux 1 à 4 sont respectées.
6.6 Les filetages sur les extrémités des flexibles de raccordement doivent être des filetages en inches
conformes à l’ISO 228-1.
7 Fabrication
7.1 Construction
Les flexibles de raccordement peuvent être forgés ou façonnés à froid, usinés à partir d'acier laminé ou
fabriqués à partir d'éléments multiples.
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, écaille et éclat qui pourraient se détacher lors de l’utilisation et de tout autre défaut qui
pourrait altérer la f
...