Rubber hoses and hose assemblies -- Compact wire-braid-reinforced hydraulic types for oil-based or water-based fluids -- Specification

ISO 11237 specifies requirements for five types of compact, wire-braid-reinforced hose and hose assembly of nominal size from 5 to 31,5. They are suitable for use with - oil-based hydraulic fluids HH, HL, HM, HR and HV as defined in ISO 6743-4 at temperatures ranging from −40 °C to +100 °C; - water-based fluids HFC, HFAE, HFAS and HFB as defined in ISO 6743-4 at temperatures ranging from 0 °C to +60 °C; - water at temperatures ranging from 0 °C to +60 °C. ISO 11237 does not include requirements for end fittings. It is limited to requirements for hoses and hose assemblies. NOTE It is the responsibility of the user, in consultation with the hose manufacturer, to establish the compatibility of the hose with the fluid to be used.

Tuyaux et flexibles en caoutchouc -- Types hydrauliques compacts avec armature de fils métalliques tressés pour fluides à base d'huile ou à base d'eau -- Spécifications

General Information

Status
Published
Publication Date
01-Oct-2017
Current Stage
6060 - International Standard published
Start Date
20-Aug-2017
Completion Date
02-Oct-2017
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ISO 11237:2017 - Rubber hoses and hose assemblies -- Compact wire-braid-reinforced hydraulic types for oil-based or water-based fluids -- Specification
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INTERNATIONAL ISO
STANDARD 11237
Second edition
2017-09
Rubber hoses and hose assemblies —
Compact wire-braid-reinforced
hydraulic types for oil-based or water-
based fluids — Specification
Tuyaux et flexibles en caoutchouc — Types hydrauliques compacts
avec armature de fils métalliques tressés pour fluides à base d'huile
ou à base d'eau — Spécifications
Reference number
ISO 11237:2017(E)
ISO 2017
---------------------- Page: 1 ----------------------
ISO 11237:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form

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ii © ISO 2017 – All rights reserved
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ISO 11237:2017(E)
Contents Page

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

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

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

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Classification ............................................................................................................................................................................................................ 2

5 Materials and construction ....................................................................................................................................................................... 2

5.1 Hoses ............................................................................................................................................................................................................... 2

5.2 Hose assemblies ..................................................................................................................................................................................... 2

6 Dimensions ................................................................................................................................................................................................................. 2

6.1 Hose diameters and cover thickness.................................................................................................................................... 2

6.2 Concentricity............................................................................................................................................................................................. 3

6.3 Hose cover thickness ......................................................................................................................................................................... 3

7 Performance requirements ....................................................................................................................................................................... 3

7.1 General ........................................................................................................................................................................................................... 3

7.2 Change in length requirements ................................................................................................................................................ 4

7.3 Hydrostatic requirements ............................................................................................................................................................. 4

7.4 Minimum bend radius ...................................................................................................................................................................... 5

7.5 Resistance to impulse ........................................................................................................................................................................ 5

7.5.1 Oil-based fluid impulse test .................................................................................................................................... 5

7.5.2 Water-based fluid impulse test ........................................................................................................................... 6

7.5.3 Optional impulse test ................................................................................................................................................... 6

7.6 Leakage of hose assemblies ......................................................................................................................................................... 6

7.7 Cold flexibility .......................................................................................................................................................................................... 6

7.8 Adhesion between components ............................................................................................................................................... 6

7.9 Vacuum resistance ............................................................................................................................................................................... 7

7.10 Fluid resistance ...................................................................................................................................................................................... 7

7.10.1 General...................................................................................................................................................................................... 7

7.10.2 Oil resistance ....................................................................................................................................................................... 7

7.10.3 Water resistance .................. .................................................... ......................................................................................... 7

7.11 Ozone resistance.................................................................................................................................................................................... 7

7.12 Visual examination .............................................................................................................................................................................. 8

8 Marking .......................................................................................................................................................................................................................... 8

8.1 Hoses ............................................................................................................................................................................................................... 8

8.2 Hose assemblies ..................................................................................................................................................................................... 8

9 Recommendations for length of supplied hoses and tolerances on lengths of

hose assemblies ..................................................................................................................................................................................................... 8

Annex A (normative) Type and routine testing of production hoses ................................................................................. 9

Annex B (informative) Periodic testing of production hoses ...................................................................................................10

Annex C (informative) Recommendations for lengths of supplied hoses and length

tolerances for hose assemblies ..........................................................................................................................................................11

© ISO 2017 – All rights reserved iii
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ISO 11237:2017(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the 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 the following

URL: www.iso.org/iso/foreword.html.

This document was prepared by Technical Committee ISO/TC 45, Rubber and rubber products,

Subcommittee SC 1, Rubber and plastics hoses and hose assemblies.

This second edition cancels and replaces the first edition (ISO 11237:2010), which has been technically

revised.
The main changes compared to the previous edition are as follows:
— Clause 1 has been updated to be more precise;

— Clause 2 has been updated: ISO 4672 has been deleted and replaced by ISO 10619-2 and ISO 10619-1

has been added;

— 8.1 has been amended, year of publication of a standard shall be included in the marking if previous

edition is used;
— Clause 9 has been added to cite Annex C.
iv © ISO 2017 – All rights reserved
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INTERNATIONAL STANDARD ISO 11237:2017(E)
Rubber hoses and hose assemblies — Compact wire-braid-
reinforced hydraulic types for oil-based or water-based
fluids — Specification
1 Scope

This document specifies requirements for five types of compact, wire-braid-reinforced hose and hose

assembly of nominal size from 5 to 31,5.
They are suitable for use with

— oil-based hydraulic fluids HH, HL, HM, HR and HV as defined in ISO 6743-4 at temperatures ranging

from −40 °C to +100 °C;

— water-based fluids HFC, HFAE, HFAS and HFB as defined in ISO 6743-4 at temperatures ranging

from 0 °C to +60 °C;
— water at temperatures ranging from 0 °C to +60 °C.

This document does not include requirements for end fittings. It is limited to requirements for hoses

and hose assemblies.

NOTE It is the responsibility of the user, in consultation with the hose manufacturer, to establish the

compatibility of the hose with the fluid to be used.
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 1307, Rubber and plastics hoses — Hose sizes, minimum and maximum inside diameters, and tolerances

on cut-to-length hoses
ISO 1402, Rubber and plastics hoses and hose assemblies — Hydrostatic testing

ISO 1817, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids

ISO 4671, Rubber and plastics hoses and hose assemblies — Methods of measurement of the dimensions of

hoses and the lengths of hose assemblies
ISO 6605, Hydraulic fluid power — Hoses and hose assemblies — Test methods

ISO 6743-4, Lubricants, industrial oils and related products (class L) — Classification — Part 4: Family H

(Hydraulic systems)

ISO 6803, Rubber or plastics hoses and hose assemblies — Hydraulic-pressure impulse test without flexing

ISO 7233, Rubber and plastics hoses and hose assemblies — Determination of resistance to vacuum

ISO 7326:2016, Rubber and plastics hoses — Assessment of ozone resistance under static conditions

ISO 8033:2016, Rubber and plastics hoses — Determination of adhesion between components

ISO 8330, Rubber and plastics hoses and hose assemblies — Vocabulary
© ISO 2017 – All rights reserved 1
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ISO 11237:2017(E)

ISO 10619-1:2011, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness —

Part 1: Bending tests at ambient temperature

ISO 10619-2:2011, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness —

Part 2: Bending tests at sub-ambient temperatures
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 8330 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 Classification

Five types of hose are specified, distinguished by their construction, working pressure and minimum

bend radius. These hoses have thin covers designed to permit fitting assembly without the removal of

the cover or a portion of the cover.
a) Type 1SC: Hoses with a single braid of wire reinforcement.
b) Type 2SC: Hoses with two braids of wire reinforcement.
c) Type R16S: Hoses with one or two braids of wire reinforcement.

d) Type R17: 21 MPa (210 bar) constant pressure hoses with one or two braids of wire reinforcement.

e) Type R19: 28 MPa (280 bar) constant pressure hoses with one or two braids of wire reinforcement.

NOTE Types R16S, R17 and R19 are not subjected to the vacuum resistance tests.
5 Materials and construction
5.1 Hoses

Hoses shall consist of a rubber lining resistant to oil- or water-based hydraulic fluids, one or two layers

of high-tensile steel wire and a weather- and oil-resistant rubber cover.
5.2 Hose assemblies

Hose assemblies shall be manufactured using hoses conforming to the requirements of this document.

Hose assemblies shall be manufactured only with those hose fittings whose correct functioning has

been verified in accordance with 7.2, 7.3, 7.5, 7.6 and 7.7. The manufacturer’s instructions shall be

followed for the preparation and fabrication of hose assemblies.
6 Dimensions
6.1 Hose diameters and cover thickness

When measured in accordance with ISO 4671, the hose diameters shall conform to the values given in

Table 1 and the cover thickness to 6.3.
2 © ISO 2017 – All rights reserved
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ISO 11237:2017(E)
Table 1 — Dimensions
...

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