SIST ISO 4079:2020

SLOVENSKI STANDARD
SIST ISO 4079:2020
01-september-2020
Gumene cevi in cevni priključki - S tekstilom ojačene hidravlične cevi za tekočine
na oljni ali vodni osnovi - Specifikacija
Rubber hoses and hose assemblies - Textile-reinforced hydraulic types for oil-based or
water-based fluids - Specification
Tuyaux et flexibles en caoutchouc - Types hydrauliques avec armature de textile pour
fluides à base d'huile ou à base d'eau - Spécifications
Ta slovenski standard je istoveten z: ISO 4079:2017
ICS:
23.100.40 Cevna napeljava in sklopke Piping and couplings
83.140.40 Gumene cevi Hoses
SIST ISO 4079:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ISO 4079:2020

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SIST ISO 4079:2020
INTERNATIONAL ISO
STANDARD 4079
Fifth edition
2017-07
Rubber hoses and hose assemblies —
Textile-reinforced hydraulic types
for oil-based or water-based fluids —
Specification
Tuyaux et flexibles en caoutchouc — Types hydrauliques avec
armature de textile pour fluides à base d’huile ou à base d’eau —
Spécifications
Reference number
ISO 4079:2017(E)
©
ISO 2017

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SIST ISO 4079:2020
ISO 4079:2017(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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copyright@iso.org
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ii © ISO 2017 – All rights reserved

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SIST ISO 4079:2020
ISO 4079:2017(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 . 4
6.1 Hose diameters and hose concentricity . 4
6.2 Length . 4
7 Performance requirements . 4
7.1 General . 4
7.2 Hydrostatic requirements . 4
7.3 Minimum bend radius . 6
7.4 Resistance to impulse . 7
7.4.1 Water-based fluid impulse test . 7
7.4.2 Oil-based fluid impulse test . 7
7.4.3 Optional impulse test . 7
7.5 Leakage of hose assemblies . 8
7.6 Cold flexibility . 8
7.7 Adhesion between components . 8
7.8 Vacuum resistance . 8
7.9 Fluid resistance . 9
7.9.1 General. 9
7.9.2 Oil resistance . 9
7.9.3 Water resistance . . . 9
7.10 Ozone resistance. 9
7.11 Visual examination . 9
8 Marking . 9
8.1 Hoses . 9
8.2 Hose assemblies .10
Annex A (normative) Type and routine testing of production hoses .11
Annex B (informative) Periodic testing of production hose .12
Annex C (informative) Recommendations for lengths of supplied hoses and tolerances on
lengths of hose assemblies .13
© ISO 2017 – All rights reserved iii

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SIST ISO 4079:2020
ISO 4079:2017(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: w w w . i s o .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 fifth edition cancels and replaces the fourth edition (ISO 4079:2015), 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 revised: year of publication of a standard shall be included in the marking if previous
edition is used.
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SIST ISO 4079:2020
INTERNATIONAL STANDARD ISO 4079:2017(E)
Rubber hoses and hose assemblies — Textile-reinforced
hydraulic types for oil-based or water-based fluids —
Specification
1 Scope
This document specifies requirements for five types of textile-reinforced hydraulic hose and hose
assembly of nominal size from 5 to 100.
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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SIST ISO 4079:2020
ISO 4079:2017(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.
— Type 1TE: hoses with a single braid of textile reinforcement.
— Type 2TE: hoses with one or more braid(s) of textile reinforcement.
— Type 3TE: hoses with one or more braid(s) of textile reinforcement (higher working pressure).
— Type R3: hoses with two braids of textile reinforcement.
— Type R6: hoses with a single braid of textile reinforcement.
NOTE Type 1TE is not subjected to the impulse or vacuum resistance test. Type R3 is not subjected to the
vacuum resistance test. Type R6 is not subjected to the impulse or vacuum resistance test.
5 Materials and construction
5.1 Hoses
Hoses shall consist of a rubber lining that is resistant to water- and oil-based hydraulic fluids, one or
more layers of suitable textile yarn and a weather- and oil-resistant rubber cover.
Hoses shall be designed to enable end fittings to be assembled without removal of the cover.
5.2 Hose assemblies
Hose assemblies shall be manufactured only with those hose fittings whose functionality has been
verified in accordance with 7.2, 7.4, 7.5 and 7.6. The manufacturer’s instructions shall be followed for
the preparation and fabrication of hose assemblies.
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SIST ISO 4079:2020
ISO 4079:2017(E)

© ISO 2017 – All rights reserved 3
Table 1 — Dimensions of hoses
Inside diameter Outside diameter
mm mm
Nominal
Types 1TE,
a
size Type R6 Type R3 Type 1TE Type 2TE Type 3TE Type R6 Type R3
b
2TE, 3TE
min. max. min. max. min. max. min. max. min. max. min. max. min. max. min. max.
5 4,4 5,2 4,2 5,4 4,5 5,4 10,0 11,6 11,0 12,6 12,0 13,6 10,3 11,9 11,9 13,5
6,3 5,9 6,9 5,6 7,2 6,1 7,0 11,6 13,2 12,6 14,2 13,6 15,2 11,9 13,5 13,5 15,1
8 7,4 8,4 7,2 8,8 7,6 8,5 13,1 14,7 14,1 15,7 16,1 17,7 13,5 15,1 16,7 18,3
10 9,0 10,0 8,7 10,3 9,2 10,1 14,7 16,3 15,7 17,3 17,7 19,3 15,1 16,7 18,3 19,8
12,5 12,1 13,3 11,9 13,5 12,4 13,5 17,7 19,7 18,7 20,7 20,7 22,7 19,0 20,6 23,0 24,6
16 15,3 16,5 15,1 16,7 15,6 16,7 21,9 23,9 22,9 24,9 24,9 26,9 22,2 23,8 26,2 27,8
19 18,2 19,8 18,3 19,9 18,7 19,8 — — 26,0 28,0 28,0 30,0 25,4 27,8 31,0 32,5
25 24,6 26,2 — — 25,1 26,2 — —
...