ISO 11237:2017

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
• ICS: 23.100.40 - Piping and couplings
• ICS: 83.140.40 - Hoses
• Technical Committee: ISO/TC 45/SC 1 - Rubber and plastics hoses and hose assemblies
• Drafting Committee: ISO/TC 45/SC 1/WG 3 - Hydraulic hoses
• Current Stage: 9599 - Withdrawal of International Standard
• Start Date: 02-May-2025
• Completion Date: 13-Dec-2025

Relations

• Revised: ISO 11237:2025 - Rubber hoses and hose assemblies - Compact wire-braid-reinforced hydraulic types for oil-based or water-based fluids - Specification
• Effective Date: 28-Jan-2023
• Revises: ISO 11237:2010 - Rubber hoses and hose assemblies - Compact wire-braid-reinforced hydraulic types for oil-based or water-based fluids - Specification
• Effective Date: 12-Dec-2015

Overview

ISO 11237:2017 specifies requirements for compact, wire-braid‑reinforced rubber hoses and hose assemblies used in hydraulic systems with oil‑based or water‑based fluids. The standard covers five hose types (1SC, 2SC, R16S, R17, R19) in nominal sizes from 5 to 31.5 mm, and defines construction, dimensional limits, performance criteria and testing for hoses and assemblies. It applies to hoses for oil‑based hydraulic fluids (HH, HL, HM, HR, HV) at −40 °C to +100 °C, water‑based fluids (HFC, HFAE, HFAS, HFB) and water at 0 °C to +60 °C. ISO 11237:2017 does not set requirements for end fittings - compatibility with fittings and fluids is the user’s responsibility in consultation with the manufacturer.

Key topics and technical requirements

• Types and classification: Five compact hydraulic hose types (single/dual wire braid and constant‑pressure R16S/R17/R19 variants).
• Materials & construction: Rubber inner lining resistant to target fluids, one or two high‑tensile steel wire braids, and a weather‑ and oil‑resistant rubber cover.
• Dimensions: Specified inside/outside diameters, concentricity limits and cover thickness 0.8–1.5 mm (measured per ISO 4671).
• Pressure ratings: Maximum working pressures, proof pressures and minimum burst pressures are defined by type and nominal size (tables in the standard). Some types reach up to ~28 MPa (280 bar) working pressure.
• Performance & testing: Requirements and test methods for change in length at max working pressure (+2% to −4%), hydrostatic testing (ISO 1402), impulse resistance (oil and water‑based), cold flexibility, vacuum resistance (not applicable to some types), adhesion between components, ozone resistance and visual examination. Annexes cover type/routine and periodic testing, plus length tolerances.
• Marking & documentation: Marking rules for hoses and assemblies, including edition/year reporting where older referenced standards are used.

Applications

ISO 11237:2017 is intended for hydraulic hose systems in:

• Mobile and industrial hydraulic equipment (construction, agriculture, material handling)
• Fluid power systems using oil‑based or specified water‑based hydraulic fluids
• Maintenance, replacement and assembly of hose circuits where compact, wire‑braid reinforcement and thin covers are required

Who uses this standard

• Hose manufacturers and assemblers
• OEM designers and specifiers of hydraulic systems
• Maintenance and reliability engineers
• Procurement and quality assurance teams
• Test laboratories validating hose performance

Related standards

Normative references cited include ISO 1402 (hydrostatic testing), ISO 6743‑4 (fluid classification), ISO 4671 (dimension measurement), ISO 6803 (impulse testing), ISO 8033 (adhesion), ISO 7326 (ozone resistance), and ISO 10619 (flexibility/stiffness). These provide the test methods and terminology used throughout ISO 11237:2017.

Keywords: ISO 11237:2017, rubber hoses, hose assemblies, wire‑braid‑reinforced, hydraulic hoses, oil‑based fluids, water‑based fluids, hydrostatic testing, impulse resistance, working pressure, cover thickness.

Standards Content (Sample)

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 2017
© 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
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
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www.iso.org
ii © ISO 2017 – All rights reserved

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
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

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 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

Table 1 — Dimensions
...