prEN ISO 18752

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)

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 avec armature de fils métalliques tressés - Spécifications (ISO/DIS 18752:2020)

Gumene cevi in cevni priključki - Vrste hidravličnih cevi in priključkov, ojačenih z žico ali tekstilom, z enojnim delovnim tlakom - Specifikacija (ISO/DIS 18752:2020)

General Information

• Status: Not Published
• ICS: 23.040.70 - Hoses and hose assemblies
• Technical Committee: CEN/TC 218 - Rubber and plastics hoses and hose assemblies
• Drafting Committee: CEN/TC 218/WG 2 - Rubber and plastics hoses and hose assemblies for hydraulic applications
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Due Date: 29-Nov-2021
• Completion Date: 29-Nov-2021
• Ref Project: oSIST prEN ISO 18752:2020 - Rubber hoses and hose assemblies - Wire- or textile-reinforced single-pressure types for hydraulic applications - Specification (ISO/DIS 18752:2020)

RELATIONS

• Revised: 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: 15-Apr-2020

Standards Content (sample)

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.

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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
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Phone: [phone]
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Email: [e-mail]
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Published in Switzerland
ii © ISO 2020 – All rights reserved
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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
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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
MWP (MPa) 3,5 7 14 21 25 28 35 42 49 56
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.
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
Grade Type
Temperature Impulse pressure
Minimum number of cycles
°C (% of MWP )
A 100 133 % 200 000
B 100 133 % 500 000
C 120 133 % and 120 % 500 000
D DC 120 133 % 1 000 000
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.
Maximum working pressure.

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
MWP (MPa) 3,5 7 14 21 25 28 35 42 49 56
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
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
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
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.
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
...