ISO 1436

ISO/DISPRF 1436.2:2025(en)
ISO/TC 45/SC 1
Secretariat: DIN
Date: 2025-10-1411-11
Rubber hoses and hose assemblies — Wire-braid-reinforced
hydraulic types for oil-based or water-based fluids — Specification
Tuyaux et flexibles en caoutchouc — Types hydrauliques avec armature de fils métalliques tressés pour fluides à
base d'huile ou à base d'eau— Spécifications
PROOF
ISO/PRF 1436:2025(en)
© ISO 2025, Published in Switzerland
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Published in Switzerland
ii
ISO/DISPRF 1436.2:2025(en)
Contents
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 . 3
6.1 Hose diameters and hose concentricity . 3
6.2 Length. 4
7 Performance requirements . 4
7.1 General . 4
7.2 Hydrostatic requirements . 5
7.3 Minimum bend radius . 5
7.4 Resistance to impulse . 6
7.5 Leakage of hose assemblies . 6
7.6 Low temperature flexibility . 6
7.7 Adhesion between components . 6
7.8 Vacuum resistance . 7
7.9 Abrasion resistance . 7
7.10 Fluid resistance . 8
7.11 Ozone resistance . 8
7.12 Visual examination . 8
8 Frequency of testing . 8
9 Marking . 9
9.1 Hoses . 9
9.2 Hose assemblies . 9
Annex A (normative) Test frequency for type tests and routine tests . 11
Annex B (informative) Recommendations for lengths of supplied hoses and tolerances on
length of hose assemblies . 13
Bibliography . 14

© ISO 2025 – All rights reserved
iii
ISO/PRF 1436:2025(en)
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
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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 document should be noted. This document was drafted in accordance with the editorial rules of the
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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 seventh edition cancels and replaces the sixth edition (ISO 1436:2020), which has been technically
revised.
The main changes are as follows:
— — revision of Clause 8Clause 8 to state that the manufacturer should define the frequency of type testing;
— — revision of Annex AAnnex A;;
— — deletion of Annex BAnnex B.
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/DIS 1436.2:2025(en)
DRAFT International Standard
Rubber hoses and hose assemblies — Wire-braid-reinforced
hydraulic types for oil-based or water-based fluids — Specification
1 Scope
This document specifies requirements for six types of wire-braid-reinforced hoses and hose assemblies of
nominal size from 5 to 51. This document also specifies the hose of nominal size 63 for types 2SN and R2AT,
and the hose of nominal size 76 for type 2SN.
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
−40 °C to + 70 °C;
— — water at temperatures ranging from 0 °C to + 70 °C.
This document does not apply to the connection ends. It is limited to the performance of hoses and hose
assemblies.
NOTE 1: The hose assembly maximum working pressure is governed by the lowest maximum working pressure of the
components.
NOTE 2 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 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, 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/PRF 1436:2025(en)
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 — Measurement of flexibility and stiffness — Part 2:
Bending tests at sub-ambient temperatures
ISO/TS 20444, Rubber and plastics hoses — Determination of abrasion resistance of the outer cover
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 8330 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— — ISO Online browsing platform: available at https://www.iso.org/obp
— — IEC Electropedia: available at https://www.electropedia.org/
4 Classification
Six types of hose are specified, distinguished by their construction, working pressure and oil resistance:
— — type 1ST: hoses with a single braid of wire reinforcement and having a thick cover;
— — type 2ST: hoses with two braids of wire reinforcement and having a thick cover;
— — types 1SN and R1AT: hoses with a single braid of wire reinforcement and having a thin cover;
— — types 2SN and R2AT: hoses with two braids of wire reinforcement and having a thin cover.
Types 1ST and 2ST should not be used for new design.
NOTE Types 1SN and R1AT and types 2SN and R2AT have the same reinforcement dimensions as type 1ST and
type 2ST, respectively, except that they have thinner covers designed to assemble with fittings without removal of the
cover or a portion of the cover.
5 Materials and construction
5.1 Hoses
Hoses shall consist of a rubber lining resistant to oil- or water-based hydraulic fluids or water, one or two
layers of high-tensile steel wire and a weather- oil-and abrasion-resistant rubber cover.
5.2 Hose assemblies
Hose assemblies shall be manufactured using hoses that conform 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, 7.47.2, 7.4, 7.5, 7.5 and 7.67.6. The manufacturer's instructions shall be
followed for the preparation and fabrication of hose assemblies.
2 © ISO 2020 – All rights reserved
ISO/DISPRF 1436.2:2025(en)
6 Dimensions
6.1 Hose diameters and hose concentricity
The test shall be carried out in accordance with ISO 4671. The inside diameter and the diameter over
reinforcement of hoses shall conform to the values given in Table 1Table 1.
The test shall be carried out in accordance with ISO 4671. The outside diameter of hoses and cover thickness
(where appropriate) shall conform to the values given in Table 2Table 2.
The test shall be carried out in accordance with ISO 4671. The concentricity of hoses shall conform to the
values given in Table 3Table 3.
Table 1 — Inside diameters and diameter over the reinforcement of hoses
All types Types R1AT, 1SN, 1ST Types R2AT, 2SN, 2ST
Nominal Inside diameter Diameter over the reinforcement
a
size mm mm
min. max. min. max. min. max.
5 4,6 5,4 9,0 10,0 10,6 11,6
6,3 6,2 7,0 10,6 11,6 12,1 13,3
8 7,7 8,5 12,1 13,3 13,7 14,9
10 9,3 10,1 14,5 15,7 16,1 17,3
12,5 12,3 13,5 17,5 19,1 19,0 20,6
16 15,5 16,7 20,6 22,2 22,2 23,8
19 18,6 19,8 24,6 26,2 26,2 27,8
25 25,0 26,4 32,5 34,1 34,1 35,7
31,5 31,4 33,0 39,3 41,7 43,3 45,7
38 37,7 39,3 45,6 48,0 49,6 52,0
51 50,4 52,0 58,7 61,7 62,3 64,7
b
63 62,3 64,7 — — 72,2 73,8
c
76 75,0 77,4 — — 87,0 88,6
a The hose sizes correspond to those given in ISO 1307.
b This hose size is for types R2AT and 2SN only.
c This hose size is for type 2SN only.
Table 2 — Outside diameters and cover thickness of hoses
Type 1ST Types 1SN, R1AT Type 2ST Types 2SN, R2AT
Outside Outside Cover Outside Outside Cover
Nominal
diameter diameter thickness diameter diameter thickness
a
size
mm mm mm mm mm mm
min. max. max. min. max. min. max. max. min. max.
5 11,9 13,5 12,5 0,8 1,5 15,1 16,7 14,1 0,8 1,5
6,3 15,1 16,7 14,1 0,8 1,5 16,7 18,3 15,7 0,8 1,5
8 16,7 18,3 15,7 0,8 1,5 18,3 19,9 17,3 0,8 1,5
© ISO 2025 – All rights reserved
ISO/PRF 1436:2025(en)
Type 1ST Types 1SN, R1AT Type 2ST Types 2SN, R2AT
Outside Outside Cover Outside Outside Cover
Nominal
diameter diameter thickness diameter diameter thickness
a
size
mm mm mm mm mm mm
min. max. max. min. max. min. max. max. min. max.
10 19,0 20,6 18,1 0,8 1,5 20,6 22,2 19,7 0,8 1,5
12,5 22,2 23,8 21,4 0,8 1,5 23,8 25,4 23,0 0,8 1,5
16 25,4 27,0 24,5 0,8 1,5 27,0 28,6 26,2 0,8 1,5
19 29,4 31,0 28,5 0,8 1,5 31,0 32,6 30,1 0,8 1,5
25 37,1 39,1 36,6 0,8 1,5 38,5 40,9 38,9 1,0 2,0
31,5 44,4 47,6 44,8 1,0 2,0 49,2 52,4 49,5 1,0 2,0
38 50,8 54,0 52,1 1,5 2,5 55,6 58,8 55,9 1,3 2,5
51 65,1 68,3 65,5 1,5 2,5 68,2 71,4 68,6 1,3 2,5
b
63 — — — — — — — 81,8 1,3 2,5
c
76 — — — — — — — 93,0 1,5 3,0
a The hose sizes correspond to those given in ISO 1307.
b This hose size is for types R2AT and 2SN only.
c This hose size is for type 2SN only.
Table 3 — Concentricity of hoses
Maximum variation in wall thickness
mm
Nominal s
...