ISO 4079-2:2005

INTERNATIONAL ISO
STANDARD 4079-2
First edition
2005-10-15

Rubber hoses and hose assemblies —
Textile-reinforced hydraulic types —
Specification —
Part 2:
Water-based fluid applications
Tuyaux et flexibles en caoutchouc — Types hydrauliques avec
armature de textile — Spécifications —
Partie 2: Applications pour fluide à base d'eau




Reference number
ISO 4079-2:2005(E)
©
ISO 2005

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ISO 4079-2:2005(E)
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ii © ISO 2005 – All rights reserved

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ISO 4079-2:2005(E)
Contents Page
Foreword. iv
1 Scope . 1
2 Normative references . 1
3 Classification. 2
4 Materials and construction . 2
4.1 Hoses . 2
4.2 Hose assemblies. 2
5 Dimensions. 2
5.1 Hose diameters and hose concentricity. 2
5.2 Length . 2
6 Performance requirements . 4
6.1 General. 4
6.2 Hydrostatic requirements . 4
6.3 Minimum bend radius. 4
6.4 Impulse test requirements . 6
6.5 Leakage of hose assemblies . 6
6.6 Cold flexibility . 6
6.7 Adhesion between components. 6
6.8 Vacuum resistance . 7
6.9 Abrasion resistance. 7
6.10 Fluid resistance. 7
6.11 Ozone resistance . 8
7 Marking . 8
7.1 Hoses . 8
7.2 Hose assemblies. 8
Annex A (normative) Type and routine testing of production hoses . 9
Annex B (informative) Production acceptance testing. 10
Annex C (informative) Recommendations for lengths of supplied hoses and length tolerances on
lengths of hose assemblies. 11
Bibliography . 12

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ISO 4079-2:2005(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 4079-2 was prepared by Technical Committee ISO/TC 45, Ruber and rubber products, Subcommittee
SC 1, Hoses (rubber and plastics).
Together with Part 1 (see below), it cancels and replaces ISO 4079:1991, which has been technically revised.
ISO 4079 consists of the following parts, under the general title Rubber hoses and hose assemblies —
Textile-reinforced hydraulic types — Specification:
⎯ Part 1: Oil-based fluid applications
⎯ Part 2: Water-based fluid applications

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INTERNATIONAL STANDARD ISO 4079-2:2005(E)

Rubber hoses and hose assemblies — Textile-reinforced
hydraulic types — Specification —
Part 2:
Water-based fluid applications
1 Scope
This part of ISO 4079 specifies requirements for five types of textile-reinforced hydraulic hoses and hose
assemblies of nominal size from 5 to 100. They are suitable for use with hydraulic fluids HFC, HFAE, HFAS
and HFB as defined in ISO 6743-4 at temperatures ranging from − 40 °C to + 60 °C.
This part of ISO 4079 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 compatibility of the
hose with the fluid to be used.
2 Normative references
The following referenced documents are indispensable for the application 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 — Determination of the effect of liquids
ISO 4079-1, Rubber hoses and hose assemblies — Textile-reinforced hydraulic types — Specification —
Part 1: Oil-based fluid applications
ISO 4671, Rubber and plastics hoses and hose assemblies — Methods of measurement of dimensions
ISO 4672:1997, Rubber and plastics hoses — Sub-ambient temperature flexibility tests
ISO 6605, Hydraulic fluid power — Hoses and hose assemblies — Test methods
ISO 6803, Rubber or plastics hoses and hose assemblies — Hydraulic pressure impulse test without flexing
ISO 6945, Rubber hoses — Determination of abrasion resistance of the outer cover
ISO 7233, Rubber and plastics hoses and hose assemblies — Determination of suction resistance
ISO 7326:1991, Rubber and plastics hoses — Assessment of ozone resistance under static conditions
ISO 8033:1991, Rubber and plastics hose — Determination of adhesion between components
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ISO 4079-2:2005(E)
3 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 tests. Type R3 is not subjected to the vacuum
resistance or abrasion resistance tests. Type R6 is not subjected to the impulse, vacuum resistance or abrasion resistance
tests.
4 Materials and construction
4.1 Hoses
Hoses shall consist of a rubber lining resistant to water-based hydraulic fluids, one or more layers of suitable
textile yarn, and an oil- and weather-resistant rubber cover.
Hoses shall be designed to enable end fittings to be assembled without removal of the cover.
4.2 Hose assemblies
Hose assemblies shall be manufactured with only those hose fittings whose functionality has been verified in
accordance with Subclauses 6.2, 6.4, 6.5 and 6.6 of this part of ISO 4079.
The manufacturer's instructions for proper preparation and fabrication of hose assemblies shall be followed.
5 Dimensions
5.1 Hose diameters and hose concentricity
When measured in accordance with ISO 4671, the inside and outside diameters of the hoses shall conform to
the values given in Table 1.
When measured in accordance with ISO 4671, the concentricity of the hoses shall conform to the values given
in Table 2.
5.2 Length
The length of supplied hoses and hose assemblies shall be the subject of agreement between the
manufacturer and the purchaser.
NOTE Recommendations for supplied lengths of hoses and hose assemblies are given in Annex C.

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ISO 4079-2:2005(E)
© ISO 2005 – All rights reserved                   3
Table 1 — Dimensions of hoses
Inside diameter Outside diameter
mm mm
Nominal
size
a
Types 1TE, 2TE, 3TE Types R6, R3 Type 1TE Type 2TE Type 3TE Type R6 Type R3
min. max. min. max. min. max. min. max. min. max. min. max. min. max.
5 4,4 5,2 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 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 7,6 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 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 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 15,6 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 18,7 19,8 — — 26,0 28,0 28,0 30,0 25,4 27,8 31,0 32,5
...