SIST EN ISO 18752:2022

Rubber hoses and hose assemblies - Wire- or textile-reinforced single-pressure types for hydraulic applications - Specification (ISO 18752:2022)

This document specifies requirements for ten classes, four grades and seven types of wire- or textilereinforced hydraulic hoses and hose assemblies of nominal sizes ranging from 5 to 102. Each class has a
single maximum working pressure for all sizes.
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 for types AS, AC, BS and BC hoses and from −40 °C to +120 °C for types CS, CC
and DC hoses.
— water-based fluids HFC, HFAE, HFAS and HFB as defined in ISO 6743-4 at temperatures ranging
from −40 °C to +70 °C.
— water at temperatures ranging from 0 °C to +70 °C.
This document does not include requirements for the connection ends. It is limited to the performance
of hoses and hose assemblies. The hose assembly maximum working pressure is governed by the lowest
maximum working pressure of the components.
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.

Gummischläuche und -schlauchleitungen - Draht- oder textilverstärkte Einzeldrucktypen für hydraulische Anwendungen - Spezifikation (ISO 18752:2022)

Dieses Dokument legt Anforderungen an zehn Kategorien, vier Klassen und sieben Typen von draht- oder textilverstärkten Hydraulikschläuchen und -schlauchleitungen mit Nenngrößen im Bereich von 5 bis 102 fest. Jede Kategorie hat bei allen Größen einen einzigen maximalen Betriebsdruck.
Sie sind für den Gebrauch mit:
- ölbasierte Hydraulikflüssigkeiten HH, HL, HM, HR und HV geeignet, wie in ISO 6743-4 festgelegt, bei Temperaturen im Bereich von −40 °C bis +100 °C für Typen AS, AC, BS und BC und von −40 °C bis +120 °C für Typen CS, CC und DC;
- den in ISO 6743-4 festgelegten wasserbasierten Flüssigkeiten HFC, HFAE, HFAS und HFB in einem Temperaturbereich von −40 °C bis +70 °C geeignet;
- Wasser bei Temperaturen im Bereich von 0 °C bis +70 °C geeignet;
Dieses Dokument enthält keine Anforderungen an die Anschlussstutzen. Sie ist auf die Leistung von Schläuchen und Schlauchleitungen begrenzt. Der maximale Betriebsdruck einer Schlauchleitung wird durch den geringsten maximalen Betriebsdruck der Komponenten bestimmt.
ANMERKUNG Es liegt in der Verantwortung des Benutzers, in Absprache mit dem Schlauchhersteller, die Verträglichkeit des Schlauches mit der Flüssigkeit, die verwendet wird, sicherzustellen.

Tuyaux et flexibles en caoutchouc - Types hydrauliques à pression unique, avec armature de fils métalliques ou textiles tressés - Spécifications (ISO 18752:2022)

Le présent document spécifie des exigences pour dix classes, quatre grades et sept types de tuyaux et flexibles hydrauliques avec armature de fils métalliques tressés de dimensions nominales comprises entre 5 et 102. Chaque classe a une pression maximale de service unique pour toutes les dimensions.
Ils sont adaptés pour une utilisation avec:
—    des fluides hydrauliques HH, HL, HM, HR et HV tels que définis dans l’ISO 6743-4 pour une plage de températures de –40 °C à +100 °C pour les tuyaux de types AS, AC, BS et BC et de –40 °C à +120 °C pour les tuyaux de types CS, CC et DC.
—    des fluides hydrauliques à base d’eau HFC, HFAE, HFAS et HFB tels que définis dans l’ISO 6743-4 pour une plage de températures de −40 °C à +70 °C.
—    de l’eau pour une plage de températures de 0 °C à +70 °C.
Le présent document ne contient pas d'exigences relatives aux extrémités de raccordement. Il se limite aux performances des tuyaux et flexibles. La pression maximale de service du flexible. La pression maximale de service du flexible est régie par la plus faible pression maximale de service des composants.
NOTE            Il est de la responsabilité de l'utilisateur, en concertation avec le fabricant de tuyaux, d'établir la compatibilité du tuyau avec le fluide destiné à être utilisé.

Gumene cevi in cevni priključki - Vrste hidravličnih cevi in priključkov, ojačenih z žico ali tekstilom, z enojnim delovnim tlakom - Specifikacija (ISO 18752:2022)

Ta dokument določa zahteve za deset razredov, štiri skupine in sedem vrst s tekstilom ojačenih hidravličnih cevi in cevnih priključkov z nazivno velikostjo od 5 do 102. Vsak razred ima en sam največji delovni tlak za vse velikosti. Primerni so za uporabo s/z: – hidravličnimi tekočinami na oljni osnovi HH, HL, HM, HR in HV, kot je opredeljeno v standardu ISO 6743-4 pri temperaturah od –40 °C do 100 °C za vrste cevi AS, AC, BS in BC ter od –40 °C do 120 °C za vrste cevi CS, CC in DC; – tekočinami na vodni osnovi HFC, HFAE, HFAS in HFB, kot je opredeljeno v standardu ISO 6743-4 pri temperaturah od –40 °C do 70 °C; – vodo pri temperaturah od 0 °C do 70 °C. Ta dokument ne vključuje zahtev za priključne konce. Standard je omejen na učinkovitost cevi in cevnih priključkov. Največji delovni tlak cevnega priključka je določen z najnižjim maksimalnim delovnim tlakom elementov. OPOMBA: Uporabnik mora po posvetovanju s proizvajalcem cevi določiti združljivost cevi z uporabljeno tekočino.

General Information

• Status: Published
• Public Enquiry End Date: 31-Jul-2020
• Publication Date: 18-Apr-2022
• ICS: 23.040.70 - Hoses and hose assemblies
• Technical Committee: IPMA - Polimer materials and products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 13-Apr-2022
• Due Date: 18-Jun-2022
• Completion Date: 19-Apr-2022
• Ref Project: EN ISO 18752:2022 - Rubber hoses and hose assemblies - Wire- or textile-reinforced single-pressure types for hydraulic applications - Specification (ISO 18752:2022)

Relations

• Replaces: SIST EN ISO 18752:2016 - Rubber hoses and hose assemblies - Wire- or textile-reinforced single-pressure types for hydraulic applications - Specification (ISO 18752:2014)
• Effective Date: 13-Apr-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 18752:2022
01-junij-2022
Nadomešča:
SIST EN ISO 18752:2016
Gumene cevi in cevni priključki - Vrste hidravličnih cevi in priključkov, ojačenih z
žico ali tekstilom, z enojnim delovnim tlakom - Specifikacija (ISO 18752:2022)
Rubber hoses and hose assemblies - Wire- or textile-reinforced single-pressure types for
hydraulic applications - Specification (ISO 18752:2022)
Gummischläuche und -schlauchleitungen - Draht- oder textilverstärkte Einzeldrucktypen
für hydraulische Anwendungen - Spezifikation (ISO 18752:2022)
Tuyaux et flexibles en caoutchouc - Types hydrauliques à pression unique, avec
armature de fils métalliques ou textiles tressés - Spécifications (ISO 18752:2022)
Ta slovenski standard je istoveten z: EN ISO 18752:2022
ICS:
23.040.70 Gumene cevi in armature Hoses and hose assemblies
SIST EN ISO 18752:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 18752:2022

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SIST EN ISO 18752:2022


EN ISO 18752
EUROPEAN STANDARD

NORME EUROPÉENNE

April 2022
EUROPÄISCHE NORM
ICS 23.040.70 Supersedes EN ISO 18752:2016
English Version

Rubber hoses and hose assemblies - Wire- or textile-
reinforced single-pressure types for hydraulic applications
- Specification (ISO 18752:2022)
Tuyaux et flexibles en caoutchouc - Types hydrauliques Gummischläuche und -schlauchleitungen - Draht- oder
à pression unique, avec armature de fils métalliques ou textilverstärkte Einzeldrucktypen für hydraulische
textiles tressés - Spécifications (ISO 18752:2022) Anwendungen - Spezifikation (ISO 18752:2022)
This European Standard was approved by CEN on 27 March 2022.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 18752:2022 E
worldwide for CEN national Members.

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SIST EN ISO 18752:2022
EN ISO 18752:2022 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 18752:2022
EN ISO 18752:2022 (E)
European foreword
This document (EN ISO 18752:2022) has been prepared by Technical Committee ISO/TC 45 "Rubber
and rubber products" in collaboration with Technical Committee CEN/TC 218 “Rubber and plastics
hoses and hose assemblies” the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by October 2022, and conflicting national standards shall
be withdrawn at the latest by October 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 18752:2016.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 18752:2022 has been approved by CEN as EN ISO 18752:2022 without any modification.


3

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SIST EN ISO 18752:2022

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SIST EN ISO 18752:2022
INTERNATIONAL ISO
STANDARD 18752
Fourth edition
2022-03
Rubber hoses and hose assemblies —
Wire- or textile-reinforced single-
pressure types for hydraulic
applications — Specification
Tuyaux et flexibles en caoutchouc — Types hydrauliques à pression
unique, avec armature de fils métalliques ou textiles tressés —
Spécifications
Reference number
ISO 18752:2022(E)
© ISO 2022

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SIST EN ISO 18752:2022
ISO 18752:2022(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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2022 – All rights reserved

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SIST EN ISO 18752:2022
ISO 18752:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification . 2
4.1 Classes . 2
4.2 Grades and types . 2
5 Materials and construction . 3
5.1 Hoses . 3
5.2 Hose assemblies . 3
6 Dimensions and tolerances .4
6.1 Diameters . 4
6.2 Cover thickness . 6
6.3 Concentricity . 6
6.4 Length . 6
7 Physical properties .7
7.1 Fluid resistance of rubber compounds . 7
7.1.1 Test pieces . 7
7.1.2 Oil resistance . 7
7.1.3 Water-based fluid resistance . 7
7.1.4 Water resistance . 7
7.2 Performance requirements . 7
7.2.1 Hydrostatic requirements . 7
7.2.2 Change in length . 8
7.2.3 Minimum bend radius. 8
7.2.4 Resistance to impulse . 10
7.2.5 Leakage of hose assemblies . 10
7.2.6 Cold flexibility . 10
7.2.7 Adhesion between components . 10
7.2.8 Vacuum resistance . 10
7.2.9 Ozone resistance . 11
7.2.10 Abrasion resistance . 11
8 Frequency of testing . .11
9 Marking . .11
9.1 Hoses . 11
9.2 Hose assemblies . 11
10 Recommendations for packaging and storage .11
11 Information by hose manufacturer .12
12 Test report .12
Annex A (normative) Type tests and routine tests .13
Annex B (informative) Production tests .14
Annex C (informative) Information to be provided by hose manufacturer .15
Bibliography .16
iii
© ISO 2022 – All rights reserved

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SIST EN ISO 18752:2022
ISO 18752:2022(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 45, Rubber and rubber products,
Subcommittee SC 1, Rubber and plastics hoses and hose assemblies, in collaboration with the European
Committee for Standardization (CEN) Technical Committee CEN/TC 218, Rubber and plastics hoses and
hose assemblies, in accordance with the Agreement on technical cooperation between ISO and CEN
(Vienna Agreement).
This fourth edition cancels and replaces the third edition (ISO 18752:2014), which has been technically
revised.
The main changes are as follows:
— the scope has been extended to water-based fluid, in order to align the document with ISO 1436,
ISO 3862 and ISO 4079;
— in 7.1.2:
— “For all grades” was replaced with “For types AS, AC, BS and BC”;
— a new temperature condition of 120 °C was added;
— a new subclause 7.1.3 was added;
— in Annex B, Table B.1, change in length test per batch, was replaced “X” with “N/A”.
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

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SIST EN ISO 18752:2022
INTERNATIONAL STANDARD ISO 18752:2022(E)
Rubber hoses and hose assemblies — Wire- or textile-
reinforced single-pressure types for hydraulic applications
— Specification
1 Scope
This document specifies requirements for ten classes, four grades and seven types of wire- or textile-
reinforced hydraulic hoses and hose assemblies of nominal sizes ranging from 5 to 102. Each class has a
single maximum working pressure for all sizes.
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 for types AS, AC, BS and BC hoses and from −40 °C to +120 °C for types CS, CC
and DC hoses.
— water-based fluids HFC, HFAE, HFAS and HFB as defined in ISO 6743-4 at temperatures ranging
from −40 °C to +70 °C.
— water at temperatures ranging from 0 °C to +70 °C.
This document does not include requirements for the connection ends. It is limited to the performance
of hoses and hose assemblies. The hose assembly maximum working pressure is governed by the lowest
maximum working pressure of the components.
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 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 — Test methods for hoses and hose assemblies
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, Rubber and plastics hoses — Determination of adhesion between components
ISO 8330, Rubber and plastics hoses and hose assemblies — Vocabulary
1
© ISO 2022 – All rights reserved

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SIST EN ISO 18752:2022
ISO 18752:2022(E)
ISO 10619-1:2017, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness —
Part 1: Bending tests at ambient temperature
ISO 10619-2:2021, Rubber and plastics hoses and tubing — M
...

SLOVENSKI STANDARD
oSIST prEN ISO 18752:2020
01-julij-2020
Gumene cevi in cevni priključki - Vrste hidravličnih cevi in priključkov, ojačenih z
žico ali tekstilom, z enojnim delovnim tlakom - Specifikacija (ISO/DIS 18752:2020)
Rubber hoses and hose assemblies - Wire- or textile-reinforced single-pressure types for
hydraulic applications - Specification (ISO/DIS 18752:2020)
Gummischläuche und -schlauchleitungen - Draht- oder textilverstärkte Einzeldrucktypen
für hydraulische Anwendungen - Spezifikation (ISO/DIS 18752:2020)
Tuyaux et flexibles en caoutchouc - Types hydrauliques avec armature de fils
métalliques tressés - Spécifications (ISO/DIS 18752:2020)
Ta slovenski standard je istoveten z: prEN ISO 18752
ICS:
23.040.70 Gumene cevi in armature Hoses and hose assemblies
oSIST prEN ISO 18752:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 18752:2020

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oSIST prEN ISO 18752:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 18752
ISO/TC 45/SC 1 Secretariat: DIN
Voting begins on: Voting terminates on:
2020-06-11 2020-09-03
Rubber hoses and hose assemblies — Wire- or textile-
reinforced single-pressure types for hydraulic applications
— Specification
ICS: 23.040.70
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
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
ISO/CEN PARALLEL PROCESSING
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
Reference number
NATIONAL REGULATIONS.
ISO/DIS 18752:2020(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2020

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oSIST prEN ISO 18752:2020
ISO/DIS 18752:2020(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2020
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: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

---------------------- Page: 4 ----------------------
oSIST prEN ISO 18752:2020
ISO/DIS 18752:2020(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification . 2
4.1 Classes . 2
4.2 Grades and types . 2
5 Materials and construction . 3
5.1 Hoses . 3
5.2 Hose assemblies . 3
6 Dimensions and tolerances . 4
6.1 Diameters . 4
6.2 Cover thickness . 6
6.3 Concentricity. 6
7 Physical properties . 7
7.1 Fluid resistance of rubber compounds . 7
7.1.1 Test pieces . 7
7.1.2 Oil resistance . 7
7.2 Performance requirements . 7
7.2.1 Hydrostatic requirements . 7
7.2.2 Change in length . 7
7.2.3 Minimum bend radius . 8
7.2.4 Resistance to impulse .10
7.2.5 Leakage of hose assemblies .11
7.2.6 Cold flexibility .11
7.2.7 Adhesion between components .11
7.2.8 Vacuum resistance .11
7.2.9 Ozone resistance .11
8 Frequency of testing .11
9 Marking .12
9.1 Hoses .12
9.2 Hose assemblies .12
10 Recommendations for packaging and storage .12
11 Information by hose manufacturer .12
12 Test report .12
Annex A (normative) Type tests and routine tests .13
Annex B (informative) Production tests .14
Annex C (informative) Information to be provided by hose manufacturer .15
Bibliography .16
© ISO 2020 – All rights reserved iii

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oSIST prEN ISO 18752:2020
ISO/DIS 18752:2020(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 45, Rubber and rubber products,
Subcommittee SC 1, Rubber and plastics hoses and hose assemblies.
This fourth edition cancels and replaces the third edition (ISO 18752:2014), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— Scope is extended to water-based fluid, in order to align the standard with ISO 1436, ISO 3861 and
ISO 4079
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 2020 – All rights reserved

---------------------- Page: 6 ----------------------
oSIST prEN ISO 18752:2020
DRAFT INTERNATIONAL STANDARD ISO/DIS 18752:2020(E)
Rubber hoses and hose assemblies — Wire- or textile-
reinforced single-pressure types for hydraulic applications
— Specification
1 Scope
This document specifies requirements for ten classes, four grades and seven types of wire- or textile-
reinforced hydraulic hoses and hose assemblies of nominal sizes ranging from 5 to 102. Each class has a
single maximum working pressure for all sizes.
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 for types AS, AC, BS and BC hoses and from −40 °C to +120 °C for types CS, CC
and DC hoses;
— water-based fluids HFC, HFAE, HFAS and HFB as defined in ISO 6743-4 at temperatures ranging
from −40 °C to +70 °C;
— water at temperatures ranging from 0 °C to +70 °C;
This document does not include requirements for the connection ends. It is limited to the performance
of hoses and hose assemblies. The hose assembly maximum working pressure is governed by the lowest
maximum working pressure of the components.
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 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 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 7326:2006, Rubber and plastics hoses — Assessment of ozone resistance under static conditions
ISO 8033:2006, Rubber and plastics hoses — Determination of adhesion between components
ISO 8330, Rubber and plastics hoses and hose assemblies — Vocabulary
ISO 10619-1, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness — Part 1:
Bending tests at ambient temperature
© ISO 2020 – All rights reserved 1

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oSIST prEN ISO 18752:2020
ISO/DIS 18752:2020(E)

ISO 10619-2:2011, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness —
Part 2: Bending tests at sub-ambient temperatures
ISO 17165-1, Hydraulic fluid power — Hose assemblies — Part 1: Dimensions and requirements
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:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4 Classification
4.1 Classes
Ten classes of hose are specified, distinguished by their maximum working pressure, as shown in
Table 1. Each class may be manufactured in up to 14 nominal sizes.
Table 1 — Classes and nominal sizes
Class 35 70 140 210 250 280 350 420 490 560
a
MWP (MPa) 3,5 7 14 21 25 28 35 42 49 56
a
MWP (bar) 35 70 140 210 250 280 350 420 490 560
Nominal size
5 X X X X X X X X N/A N/A
6,3 X X X X X X X X N/A N/A
8 X X X X X X X X N/A N/A
10 X X X X X X X X N/A N/A
12,5 X X X X X X X X N/A N/A
16 X X X X X X X X X X
19 X X X X X X X X X X
25 X X X X X X X X X X
31,5 X X X X X X X X X X
38 X X X X X X X X N/A N/A
51 X X X X X X X X N/A N/A
63 X X X X X X X N/A N/A N/A
76 X X X N/A N/A N/A N/A N/A N/A N/A
102 X N/A N/A N/A N/A N/A N/A N/A N/A N/A
X = Applicable; N/A = Not applicable.
a
Maximum working pressure.
4.2 Grades and types
Hoses are classified into four grades according to their resistance to impulse: A, B, C and D. Each grade
is classified by outside diameter into standard types (AS, BS and CS) and compact types (AC, BC, CC and
DC), as shown in Table 2.
2 © ISO 2020 – All rights reserved

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oSIST prEN ISO 18752:2020
ISO/DIS 18752:2020(E)

Table 2 — Grades and types
Resistance to impulse
a
Grade Type
Temperature Impulse pressure
Minimum number of cycles
b
°C (% of MWP )
AS
A 100 133 % 200 000
AC
BS
B 100 133 % 500 000
BC
CS
c
C 120 133 % and 120 % 500 000
CC
D DC 120 133 % 1 000 000
a
Standard or compact, e.g. CS is grade C and standard type.
As shown in Table 4 and Table 8, standard types have larger outside diameters and larger bend radii and compact types
have smaller outside diameters and smaller bend radii.
b
Maximum working pressure.
c
120 % of the MWP shall be used for classes 350, 420, 490 and 560 instead of 133 %.
Each class includes one of each type or both as shown in Table 3.
Table 3 — Type and maximum working pressure
Class 35 70 140 210 250 280 350 420 490 560
a
MWP (MPa) 3,5 7 14 21 25 28 35 42 49 56
a
MWP (bar) 35 70 140 210 250 280 350 420 490 560
Grade Type
AS X X X X X X X X N/A N/A
A
AC X X X X X X X X N/A N/A
BS X X X X X X X X N/A N/A
B
BC X X X X X X X X N/A N/A
CS N/A N/A N/A X X X X X N/A N/A
C
CC N/A N/A N/A X X X X X X X
D DC N/A N/A N/A X X X X X N/A N/A
X = Applicable; N/A = Not applicable.
a
Maximum working pressure.
5 Materials and construction
5.1 Hoses
Hoses shall consist of a hydraulic-fluid-resistant rubber lining, one or multiple layers of steel wire
or textile and an oil-, abrasion- and weather-resistant rubber cover. A layer of other materials on the
rubber cover is allowed for improved resistance to abrasion or other.
5.2 Hose assemblies
Hose
...